my toothpaste with Nanotechnology?

Imagine a toothpaste that not only seeks out but actually repairs destroy to tooth enamel. For those who dread their annual visit to the dentist, this may sound like science fiction. For people in Japan, it is a reality. Using nanoparticles, Japan's Sangi Company, Ltd., has sold over 50 million tubes - & continues to expand its line of products containing nanoparticles. Scientists have learned to synthesize hydroxyapatite, a key part of tooth enamel, as nanosized crystals. When nano-hydroxyapatite is used in toothpaste, it forms a protective film on tooth enamel, & even restores the surface in damaged areas. Availability of similar products that claim to actually repair cavities is around the corner.

Toothpaste is among consumer products that contain nanoparticles

Unlikely as it seems at first blush, the $200 billion global cosmetics industry is of the major players in the emerging field of nanotechnology. According to the Centre for the Study of Environmental Change at Lancaster University in Britain, the cosmetics industry already holds the largest number of patents for nanoparticles - & be it toothpaste, sunscreen, shampoo, hair conditioner, lipstick, eye shadow, after shave, moisturizer or deodorant, the industry is leading the way.
 reason for this is the very marketable area of anti-aging products. In 2004, the marketplace for these youth-promising skin care treatments was estimated at US$9.9 billion worldwide. New advances by nanotechnology are expected to drive that number up significantly. Take L'Oreal, which ranks sixth among nanotechnology patent holders in the U.S., with  200 nanotechnology patents according to Boston-based UTEK-EKMS, Inc. The cosmetics giant has developed a polymeric nanocapsule which guides active ingredients in to the lower layers of skin, increasing their efficacy. Although these fountain of youth products may be the most marketable & most profitable, L'Oreal & its competitors are also introducing nanoproducts that have been engineered to produce dramatic results of a different sort, such as eye shadow with more vivid colors & iridescent or metallic effects.
For years, the cosmetics industry has made a great deal of money by promotion beauty products. People require these things & cosmetics companies provide them - simple supply & demand. The issue with nanoengineered products is that no knows whether they are safe.

Nanoparticles can feign very antithetical chemical, corporeal and begotten properties than their normal-sized counterparts. This, coupled with the fact that these tiny particles can be absorbed finished the cutis or indrawn, is causing operative concern about the country of nanoparticles, especially those victimized in informal toiletries.
Tho' there is no expressed inform that nanocosmetics pose a health hazard, origin studies inform there may be large seek of nanoparticles temporary through the rind, into the bloodstream, and accumulating in paper and meat. It is believed that hearty wound provides an decent roadblock against particle sorption; nonetheless scraped, and plane flexed, pare may countenance particles to follow the body.
A assemble of researchers led by the Neurotoxicology Discord at EPA's (Environmental Endorsement Bureau) National Welfare and Environmental Effects Research Laboratory in the U.S. jazz studied the force of titania (titanium pollutant nanoparticles) in walk cells. The researchers rumored ("Metal Whitener (P25) Produces Activated Oxygen Species in Immortalized Intelligence Microglia (BV2): Implications for Nanoparticle Neurotoxicity") that the nanoparticles, which are currently victimized in sunblock products, falsify the cells' mean greeting to adventive particles. Rather than releasing a have of chemicals - oxidizable gas species (ROS) - to protect the mentality, the nanoparticles stimulate a slower resign of ROS, which could be potentially prejudicious to other intelligence cells. Else studies someone shown correspondent results in search. There is no aggregation to affirm that this type of oxidative
{Although this is one of much than 350 hit studies ("Calls Wave for Much Explore on Toxicology of Nanomaterials") currently underway at labs and academic institutions around the orb, scientists emphasize that these results are origination and untold solon explore must be done before an answer is institute. In an article publicised in Power ("Virulent Potential of Materials at the Nanolevel"), researchers at UCLA finished that though it is likely that engineered nanomaterials may make nephrotoxic personalty, there is less grounds to declare the personalty instrument cause a key difficulty that cannot be addressed by a noetic, technological motion. Although assured in science's knowledge to assure the safety of nanomaterials, these scientists also urge an prompt and proactive attack to area - which so far, hasn't happened in a large-scale and interconnected way.
In the meantime, numerous toiletry containing nanoparticles are already on the industry, and author are state introduced. A past list work institute statesman than 270 nanotechnology products already on the industry in 15 countries; umpteen of those were toiletries. These 270+ products may inform a fairly true show of the industry - or they may personify only a puny reckon of what's truly out there.
Because the toiletry manufacture is largely unregulated and cosmetics manufacturers are not required to give quantity labeling, more grouping may be exposing themselves to the country uncertainties of nanoparticles without educated it. At this doctor, consumers can bag their purchasing decisions only on advertising claims. And, piece nanotechnology is a general nonsense in marketing, not all products containing nanoparticles advertise their proximity.
The lack of substance nigh the safety of nanoparticles has generated fear among directional supranational regulatory agencies. In the U.S., the Matter and Ingest Governance (FDA) is currently considering whether a effort and empowerment system control the use of nanoparticles in toiletries should be implemented.
Crusader Concerns Get Louder
Friends of the Stuff (FOE), an outside mesh of grassroots environmental groups, is one of the most voiced advocates for stricter controls on products containing nanoparticles. The system is calling for a moratorium on specified products and the termination of those already on the marketplace, until decent bingle studies know been completed and regulations put in gauge.
In a past information ("Nanomaterials, sunscreens and cosmetics: Runty Ingredients, Big Risks", pdf download 4 MB), FOE criticizes regime agencies, including the FDA and the Royal Order in the UK, for their lack of activity concerning the business and merchantability of products containing nanoparticles. "The insolvency of regime regulators to bonk earnestly the azoic warning signs surrounding nanotoxicity suggests that they have learned null from any of the longer identify of disasters that resulted from the nonstarter to act to azoic warning signs around old detected 'wonder' materials (suchlike asbestos, DDT and PCBs)." Remaining organizations, including the Environmental Construction with business for nano-cosmetics that expectation low wrinkles or whiter set, the enticement may examine overwhelming. Whether the promises - or the risks - are sincere needs to be shown. Notwithstanding, until the potency risks are thoroughly premeditated, should the bark for smoother rind and flashier eye dominate conduct activity over eudaimonia and safety concerns?
 

nanotechnology startling landscapes

The nanoworld cannot be portrayed with a camera, nor can it be seen even with the most powerful optical microscope. Only special instruments have access to images of the nanoworld. A fascinating new exhibition "Blow-up: images from the nanoworld" in Modena/Italy shows the work of scientists associated with the National Middle on Nanostructures & Biosystems at Surfaces in Modena, France, headed by Elisa Molinari. The images have been manipulated in a variety of ways by photographer, Lucia Covi. Covi is sensible to the aesthetic paradigms of scientists: her gaze thus grasps essential aspects of the portrayed objects & lets her shine them with a brand spanking new light, as they are revealed now. This exhibition brings to the public images that are usually available to few, because they stay confined in the research laboratories, on the scientists' desks. The images are stills that, over time, have been put together from different framings, & that they can look at thanks to the mediation of machines. A number of them represent exceptional events, outstanding results that ended on the cover of scientific journals. Others were born from everyday research. All of them show a landscape that is being unraveled by scientists, scenery that is different from the they can see in the media, largely obtained through computer graphics & "artistic" interpretations, when not directly borrowed from science fiction.

 

Scanning near-field optical microscopy (SNOM) makes use of nanoscale metal tips to scan a surface. Here, a standard tip has been modified & sharpened to increase its precision. The tip in the midst of this structure measures a few tens of nanometers. (Picture: G.C. Gazzadi, S3 (INFM-CNR), Modena; P.Gucciardi, CNR-IPCF, Messina. Artwork: Lucia Covi)

Developing new instruments to be able to "see" at the nanoscale is a research field in itself. Shown here is the tip of an atomic force microscope (AFM), of the foremost tools for imaging, measuring & manipulating matter at the nanoscale. Here, a platinum electrode measuring hundredth of a nanometer has been deposited on the tip of this pyramid formed AFM tip by focused ion beam (FIB) deposition. (Picture: C. Menozzi, G.C. Gazzadi, S3 (INFM-CNR), Modena. Artwork: Lucia Covi)

Top view of a hole carved in a polyethylene surface. During a series of experiments the use of a FIB has proven to be very versatile and capable of carving various materials, including plastic. (Image: G.C. Gazzadi, S3 (INFM-CNR), Modena. Artwork: Lucia Covi)

Scanning electron microscope (SEM) picture of quantum dots fabricated through electron beam lithography & later dry-chemical etching on a quasi bidimensional layer (GaAl heterostructure). These structures are used to study the behavior of electrons, which are confined in to small spaces – approximate. ten electrons per dot. The diameter of each quantum dot is 200 nm (which means that a billion of these structure basically fit on the tip of your finger). (Picture: C.P. Garcia, V. Pellegrini , NEST (INFM), Pisa. Artwork: Lucia Covi)

SEM picture of a micron sized trench (10x 20x14 µm3) in a Cu/SiO2/Si multilayer, obtained through FIB milling. The precision of this method allows the visualization of ultrathin (tens of nanometers) layers. (Picture: G.C.Gazzadi, S.Frabboni, S3 (INFM-CNR), Modena. Artwork: Lucia Covi)

SEM picture of a work sample on a magnesium oxide surface using FIB. The diameter of the hole measures approximate. three µm. (Picture: G.C. Gazzadi, A. Spessot, S3 (INFM-CNR), Modena. Artwork: Lucia Covi)

Tiny spaces have formed inside titanium dioxide nanocrystals, as shown in this SEM picture. The square structure of these inside spaces, which measure between twenty nm & 40 nm, is due to the crystalline structure of the material. (Picture: L. Nasi, IMEM (CNR), Parma. Artwork: Lucia Covi)

nanofabrication of armor Nature's bottom-up

nanofabrication of armor Nature's bottom-up .

Seashells are natural armor materials. The necessity for toughness arises because aquatic organisms are subject to fluctuating forces & impacts in the work of motion or through interaction with a moving surroundings. Nacre (mother-of-pearl), the pearly internal layer of plenty of mollusc shells, is the best example of a natural armor material that exhibits structural robustness, despite the brittle nature of their ceramic constituents. This material consists of about 95% inorganic aragonite with only a few percent of organic biopolymer by volume. New research at the university of South Carolina reveals the toughening secrets in nacre: rotation & deformation of aragonite nanograins absorb energy in the deformation of nacre. The aragonite nanograins in nacre are not brittle but deformable. The new findings may lead to the development of ultra-tough nanocomposites, for example for armor material, by realizing the rotation mechanism.

Super-tough and ultra-high temperature resistant materials are in critical need for applications under extreme conditions such as jet engines, power turbines, catalytic heat exchangers, military armors, aircrafts, and spacecrafts. Structural ceramics have largely failed to fulfill their promise of revolutionizing engines with strong materials that withstand very high temperature. The major problem with the use of ceramics as structural materials is their brittleness. Although many attempts have been made to increase their toughness, including incorporation of fibers, whiskers, or particles, and ZrO2 phase transformation toughening, currently available ceramics and their composites are still not as tough as metals and polymers. The brittleness of ceramic materials has not yet been overcome. It has proven difficult to solve this problem by conventional approaches.
On the other hand, Nature has evolved complex bottom-up methods for fabricating ordered nanostructured materials that often have extraordinary mechanical strength and toughness. One of the best examples is nacre. It has evolved through millions of years to a level of optimization not currently achieved in engineered composites.
This material has a brick-and-mortar-like structure with highly organized polygonal aragonite platelets of a thickness ranging from 200 to 500 nm and an edge length about 5 µm sandwiched with a 5-20 nm thick organic biopolymer interlayer, which assembles the aragonite platelets together. The combination of the soft organic biopolymer and the hard inorganic calcium carbonate produces a lamellar composite with a 2-fold increase in strength and a 1000-fold increase in toughness over its constituent materials.
Such remarkable properties have motivated many researchers to synthesize biomimetic nanocomposites that attempt to reproduce nature’s achievements and to understand the toughening and deformation mechanisms of natural nanocomposite materials.

Dr. Xiaodong Li, who heads the Nanostructures and Reliability Laboratory at the University of South Carolina, and his team have published papers that examine the role of nanostructures in the brilliant properties of nacre. In a first paper (" Nanoscale Structural and Mechanical Characterization of a Natural Nanocomposite Material: The Shell of Red Abalone"), the group reported the discovery of nanosized grains (particles) in nacre. However, the functionality of these aragonite nanograins was entirely unknown. Subsequently, lots of research groups asked: What roles do the nanoscale structures play in the inelasticity and toughening of nacre? Can they learn from this to produce nacre-like nanocomposites?
In a recent follow-up paper, Li and his group now reveal the functionality of these aragonite nanograins. The paper is titled "In Situ Observation of Nanograin Rotation and Deformation in Nacre", which appeared in the September 14, 2006 online edition of Nano Letters.
"To reveal the secret recipe of nacre is not an simple job" Li explains his research to Nanowerk. "We developed a micro-mechanical tester that can be used inside an atomic force microscope. They performed tensile and bending tests on nacre in situ where the nacre surface was imaged simultaneously by the atomic force microscope. The discoveries - rotation and deformation of aragonite nanograins clarify the earlier misunderstandings in modeling work, and provide a nanoscale modeling boundary condition. This opens up opportunities to create nacre-like ultra hard materials."
The grain rotation and deformation mechanisms in nacre aragonite platelets can be summarized by this figure:

On tension, the biopolymer between the nanograins is stretched in the tensile direction, which allows space for definite grains to rotate. Since the shape of these nanograins is normally irregular, the rotation of individual nanograins will push their neighbor grains apart, thereby leading to an increase in the spacing between the rotated nanograins and their neighbor grains (as shown in b).

With no outside applied strain/stress, nanograins with irregular shapes are originally packed closely by the biopolymer adhesives to form a sturdy structure (as shown in a).

The spacing behavior between the nanograins within an aragonite platelet causes the aragonite platelet to expand in the direction perpendicular to that of the applied strain/stress.
Schematics of grain rotation and deformation mechanisms in an aragonite platelet. D denotes grain deformation. The blue arrows denote the tensile direction. Green arrows denote the rotation direction of grains.(Reprinted with permission from the American Chemical Society)
The new findings are expected to revolutionize the way of preparing hard ceramic materials and structural parts, and will open up new application opportunities of ceramic materials and other materials as well.
Li points out that Nature has long been using bottom-up nanofabrication methods to form self-assembled nanomaterials that are much stronger and tougher than lots of manmade materials formed top-down.
"Mother Nature knows best" Li says. "Nature has evolved highly complex and elegant mechanisms for materials design and synthesis. Living organisms produce materials with physical properties that still surpass those of analogous synthetic materials with similar phase composition. They must turn our attention to Nature's designs and fabrication of materials. There is still a lot they must learn from Nature."

the wunderkind nanotechnology in pharmaceutics: Creating multifunctional nanocarriers

the wunderkind nanotechnology in pharmaceutics: Creating multifunctional nanocarriers.

The last few years saw tremendous progress in the use of nanoparticles to enhance the in vivo efficiency of many drugs. Currently used pharmaceutical nanocarriers, such as liposomes, micelles, nanoemulsions, polymeric nanoparticles and many others demonstrate a broad variety of useful properties, such as for instance increased longevity in the blood, specific targeting to certain disease sites, or enhanced intracellular penetration. Some of these pharmaceutical carriers have already made their way into clinics, while others are still under preclinical development. In the next phase of developing nanocarriers, researchers are intrigued by the possibility to synthesize pharmaceutical nanocarriers that possess not only one but several properties. Such particles can significantly enhance the efficacy of many therapeutic and diagnostic protocols. A brandnew review paper considers current status and possible future directions in the emerging area of multifunctional nanocarriers with primary attention on the combination of such properties as longevity, targetability, intracellular penetration and contrast loading.


Vladimir P. Torchilin, Distinguished Professor of Pharmaceutical Sciences and Director of the Center for Pharmaceutical Biotechnology and Nanomedicine at Northeastern University, described to Nanowerk how such nanocarriers would work: "One may want to have a drug-loaded nanocarrier demonstrating the following set of properties: (a) prolonged circulation in the blood; (b) ability to accumulate – specifically or non-specifically – in the required pathological zone, (c) responsiveness to local stimuli, such as pH and/or temperature changes, resulting, for example, in accelerated drug release, (d) allow for an effective intracellular drug delivery and further to individual cell organelles, and (e) bear a contrast/reporter moiety allowing for the real-time observation of its accumulation inside the target. Some other, more exotic properties can be added to the list, such as magnetic sensitivity."


In order to prepare such a smart multifunctional pharmaceutical nanocarrier, chemical moieties providing certain required individual properties have to be simultaneously assembled on the surface of the same nanoparticle. Moreover, these individual moieties have to function in a certain coordinated way to provide a desired combination of useful properties.


Torchilin cautions that systems like these still represent quite a challenge to researchers.



The schematic structure of the assembly of the multifunctional pharmaceutical nanocarrier. 1 – Traditional “plain” nanocarrier (a – drug loaded into the carrier); 2 – targeted nanocarrier or immunocarrier (b – specific targeting ligand, usually a monoclonal antibody, attached to the carrier surface); 3 – magnetic nanocarrier (c – magnetic particles loaded into the carrier together with the drug and allowing for the carrier sensitivity towards the external magnetic field and its use as a contrast agent for magnetic resonance imaging); 4 – long-circulating nanocarrier (d – surface-attached protecting polymer (usually PEG) allowing for prolonged circulation of the nanocarrier in the blood); 5 – contrast nanocarrier for imaging purposes (e – heavy metal atom – 111In, 99mTc, Gd, Mn – loaded onto the nanocarrier via the carrier-incorporated chelating moiety for gamma- or MR imaging application); 6 – cell-penetrating nanocarrier (f – cell-penetrating peptide, CPP, attached to the carrier surface and allowing for the carrier enhanced uptake by the cells); 7 – DNA-carrying nanocarrier such as lipoplex or polyplex (g – DNA complexed by the carrier via the carrier surface positive charge); 8 – hypothetical multifunctional pharmaceutical nanocarrier combining the properties of the carriers # 1–7. (Reprinted with permission from Elsevier)
Multifunctional nanocarriers need to possess a number of basic properties to make them effective and efficient:
Longevity in the blood
Nanoparticles are normally attacked as foreign substance by the body's defense system and removed from circulation long prior to completion of their function. Thus, the basic property of any multifunctional nanocarrier is its longevity, and long-circulating pharmaceuticals and pharmaceutical carriers represent currently an important and still growing area of biomedical research.
Chemical modification of pharmaceutical nanocarriers with certain synthetic polymers, such as polyethylene glycol (PEG), is the most frequent way to impart the in vivo longevity to drug carriers. The term “steric stabilization” has been introduced to describe the phenomenon of polymer-mediated protection. On the biological level, coating nanoparticles with PEG sterically hinders interactions of blood components with their surface and reduces the binding of plasma proteins with PEGylated nanoparticles. This prevents drug carrier interaction with opsonins and slows down their fast capture by the reticuloendothelial system (RES).
Several other polymers have also been suggested as alternative steric protectors for nano drug carriers and there is a lot of ongoing research in this area. These polymers are expected to be biocompatible, soluble, hydrophilic, and with a highly flexible main chain.
In summary, the most significant biological consequence of nanocarrier modification with protecting polymers is the sharp increase in its circulation time and decrease in their RES accumulation.
Targetability
To increase the functionality of pharmaceutical nanocarriers involves adding the property of the specific target recognition to the carrier's ability to circulate long, i.e. simultaneously attach both the protecting polymer and the targeting moiety on the surface of the nanocarrier. Targeting of drug carriers with the aid of ligands specific to cell surface-characteristic structures allows for the selective drug delivery to those cells. To obtain “simple” targeted nanocarriers, a variety of methods have been developed to attach corresponding vectors (antibodies, peptides, sugar moieties, folate, and other ligands) to the carrier surface.
Stimuli sensitivity
An additional function that researchers are keen to add to long-circulating PEGylated pharmaceutical carriers will allow for the detachment of protecting PEG chains under the action of certain local stimuli characteristic of pathological areas, such as decreased pH value or increased temperature usually noted for inflamed areas.
The problem here is that the stability of PEGylated nanocarriers may not always be favorable for drug delivery. For instance, if drug-containing nanocarriers accumulate inside a tumor, they may be unable to easily release the drug to kill the tumor cells. In order to solve these problems, for example, in the case of long-circulating liposomes, the chemistry was developed to detach PEG from the lipid anchor in the desired conditions.
As a result, polymeric components with pH-sensitive (pH-cleavable) bonds are used to produce stimuli-responsive drug delivery systems that are stable in the circulation or in normal tissues, however, acquire the ability to degrade and release the entrapped drugs in body areas or cell compartments with lowered pH, such as tumors, infarcts, or inflammation zones.
Intracellular delivery


Many biologically active compounds, including macromolecular drugs, need to be delivered intracellularly, for instance for gene therapy, to exert their therapeutic action inside the cell onto nucleus or other specific organelles, such as mitochondria. However, the lipophilic nature of the biological membranes restricts the direct intracellular delivery of such compounds.


Current delivery systems, be they viral or non-viral, all have drawbacks, such as for instance non-specificity and cytotoxic reactions, which makes them quite ineffective for clinical use. Researchers therefore have focused on the development of a new method that can deliver genetic constructs directly into the cytoplasm of the target cells. These include: the application of bimetallic nanorods that can simultaneously bind compacted DNA plasmid and targeting ligands in a spatially defined manner; membrane-destabilizing lipid components and anionic polymers; functionalizing drugs with proteins and peptides that demonstrate a unique ability to penetrate into cells (“protein transduction” phenomenon) and therefore may serve as a "transport" through the cell membrane.
Contrast moiety for visualization
To make it possible to use pharmaceutical nanocarriers for diagnostic/imaging purposes as well as to allow for their real-time biodistribution and target accumulation, contrast reporter moieties can be added to multifunctional nanocarriers to enable imaging modalities such as magnetic resonance, computer tomography or ultra-sonography.
Nanocarriers are able to carry multiple contrast moieties for an efficient delivery of contrast agents to areas of interest and enhancing a signal from these areas. Among nanocarriers for contrast agents, liposomes and micelles draw a special attention because of their easily controlled properties and good pharmacological characteristics. For instance, liposomes may incorporate contrast agents in both internal aqueous compartment and membrane.
Unlimited opportunities?
"As clearly follows from these examples, preparing multifunctional nanocarriers with controlled properties require the conjugation of proteins, peptides, polymers, cell-penetrating moieties, reporter groups and other functional ligands to the carrier surface; although, in certain cases, functional components may be loaded inside the nanocarrier or distributed within the nanocarrier structure" Torchilin explains. "This attachment can proceed non-covalently, via the hydrophobic adsorption of certain intrinsic or specially inserted hydrophobic groups in the ligands to be attached onto or into the surface of the nanocarrier. More frequently, the attachment is performed chemically, via the interaction of reactive groups generated on the carrier surface and certain groups in the molecule to be attached."
"Looking at all these developments, it becomes clear that multifunctional pharmaceutical nanocarriers could provide almost unlimited opportunities in producing highly efficient and specialized systems for drugs, genes, and diagnostic agents" Torchilin concludes. "Such multifunctional delivery systems with their individual functions acting in coordinated way should allow for delivery of pharmaceutical agents with required temporal and spatial deposition and release pattern. Although the approach is just emerging, it shows a promising future."

Researchers Create Improved Sodium-Manganese Oxide Re-chargeable Batteries Using Nanomaterials

A team of scientists at the Pacific Northwest National Laboratory of the Department of Energy are working together with researchers from the Wuhan University in China to manufacture electrodes using nanomaterials that can function well with sodium.

The electrodes in lithium rechargeable batteries consist of manganese oxide. When batteries are charged or in use, the atoms present in this metal oxide form numerous tunnels and holes and enable the free movement of lithium ions. The free motion of lithium ions allows the battery to either retain power or release it. Replacing the lithium ions with sodium ions is challenging. Sodium ions are 70% larger than lithium ions and do not accommodate well in the crevices.

Researchers tried to make larger holes in manganese oxide with the use of nanomaterials. These materials are about a million times smaller than a dime.

The team combined different types of atomic building blocks of manganese oxide of which block had atoms that arranged themselves in pyramids and the other block atoms that formed an octahedron and predicted that the resultant material would have huge S-shaped tunnels and little five-sided tunnels for ions to pass. Following the mixing, the team subjected the materials to temperatures from 450°C to 900°C. Next, they observed the materials and evaluated the most effective type of treatment.

With the help of a scanning electron microscope, the team found that the quality of material differed at different temperatures. When manganese oxide was treated at 750°C, it created the most effective crystals. When heated to 600°C, the nanowires featured pockmarks that could obstruct the sodium ions, but the 750°C-treated wires appeared even and crystalline.

The electrode was dipped in electrolyte comprising sodium ions enabling the electrodes to generate a current. They charged and discharged the new battery cells continually. The peak capacity was recorded as 128 mA/g of electrode in the coursework of discharge of the new battery cell.

Finally, the team charged the experimental battery cell at various speeds to choose the time it takes to take up electricity. The faster the battery got charged, the lesser electricity it could retain. Thus, it was established that the rate at which sodium ions diffused in to the manganese oxide restricted the capacity of the battery cell.

Nanopositioning Systems New Featuring Details Catalog by PI

PIs New Nanopositioning Systems Catalog

Physik Instrumente (PI), a company that manufactures high-accuracy motion-control devices and nanopositioning stages for semiconductor, bio-medical, nanotechnology and imaging applications, introduces a nanopositioning catalog.
The catalog consists of 160 pages and concentrates on nanopositioning systems based on piezo-flexure that can cover tiny distances as tiny as an atom diameter repetitively. It explains in detail about the ways to get multi-axis movement such as serial and parallel kinematics. Serial Kinematics is an simple and cost-effective process when compared to parallel kinematics. The catalog covers both XY and XYZ stages and tip/tilt platforms necessary for imaging, adaptive optics, nanometrology, scanning microscopy, and laser beam steering.

The company also manufactures piezo motors, piezo nanopositioning systems and actuators for a broad range of applications. The catalog offers details about piezo nanopositioning and scanning systems.

The catalog also features ceramic precision linear motors, innovative hybrid systems, and parallel kinematic positioners that are dual-axis systems with six-axis hexapods. A specific section of the catalog elaborates on digital nanopositioning controllers. This section explains about the application necessary, discusses interfacing options and various digital servo control algorithms and models to accomplish high levels of linearity in dynamic and static applications.

Back To Original Shape After Being Crumpled? Breakthrough Produces Metal Rubber Flexible Metal Sheets Snap by Nanotechnology

once its started, nothing will makes it stop, the nano even comes to Produces Metal Rubber Flexible Metal Sheets

Metal rubber is narrow and can be twisted, folded, or crumpled up, and then immediately snaps back to its original shape. It also conducts electricity like solid metal. This of work has all sorts of industrial applications, including use in consumer electronics, military and aircraft industries, and medical technologies as well. It also has applications in robotics, where metal rubber could be used for robotic skin or flexible circuits. It may even be useful for generating artificial muscles.

A breakthrough in material science has produced a highly pliable metallic substance called "metal rubber." This has been developed by a company called NanoSonic, and is the product of nanotechnology fabrication processes.

While I am not a gigantic fan of the over-hyped nanotechnology field, this particular product of nanotechnology looks promising. A material such as this might potentially revolutionize flexible circuits and make all electronics, whether in robots, medical devices, or airplanes, far more resilient and resistant to fatigue.

Nanotech will kill cancer cells by the Heat treatment

The Treatment No Mater it comes from the Nanotech or else, but the Nano can give you a hand with the cancer cells

The testes -- always a few degrees cooler than the remainder of the body -- are an ideal location for cancer cells, but proof suggests those cells die when they try to spread to other locations around the body.

Testicular cancer patients have a higher survival rate than other cancer patients because the cancer cells are sensitive to body heat, leading the researchers at Johns Hopkins University to conclude heat therapy could be a viable treatment for cancer.

"We tried to put our heads together about what they know about the differences between testicular and other cancers." Getzenberg said in the Journal of the American Medical Association. "There is an fabulous difference in treatment success, and they desired to come up with a simple idea that has a biological basis."

This leads Professor Robert Getzenberg and his colleagues to think the cancer cells would reply well to heat treatment in what they call the "Lance Armstrong effect," after the seven-time Tour de France winner who famously beat testicular cancer. Getzenberg and the other scientists are now experimenting with other heat-based methods of weakening cancer cells.

"These nanoparticles exist now and can be used in the body. The advantages are you don't must put them in every cell as long as you are getting a warming surroundings," Getzenberg said.

The issue with heat therapy would be targeting the cancer cells without doing any damage to the healthy cells. But nanotechnology could permit researchers to make use of ion particles on malignant cells directly by developing them to be drawn to specific markers on the surface of a cancer cell. Five times they bond with the cancer cells, the nanoparticles can be heated using a magnetic field.

Ed Yong, cancer information officer at Cancer Research UK, added, "Nanotechnology is a thrilling new field of science and it is set to play an increasing role in detecting and treating cancers."

But consumer health advocate Mike Adams disagrees. "You don't require nanotechnology or other technical hocus pocus to generate heat and damage cancer cells," they explains. "Just engage in regular physical exercise that makes you hot and produces a healthy sweat. Lance Armstrong didn't beat testicular cancer with nanotechnology, they beat it by pumping his legs on a bicycle."

treasure of the green nanotechnology might be in Cinnamon

(NaturalNews) Gold nanoparticles, so brilliantly tiny they can not be seen by the bare eye, are used in electronics, healthcare products and as pharmaceuticals in some cancer treatments. Regrettably, the positive applications of gold nanoparticles come with a downside -- producing the nanoparticles requires very poisonous chemicals and harmful acids. And, because the nanotechnology industry is expected to produce giant quantities of nanoparticles in the immediate future, serious concerns are being raised over the environmental impact of the global nanotechnological revolution and its current need for poisonous materials.

But now University of Missouri (UM) scientists have found a way to make "green" nanotechnology by replacing all of the poisonous chemicals necessary to make gold nanoparticles. How can this be accomplished? By using a spice present in most kitchens -- cinnamon.

There is another benefit, . "Our gold nanoparticles are not only ecologically and biologically benign, they are also biologically active against cancer cells," Dr. Katti announced in a statement to the media.

For their study, which was recently published in the journal Pharmaceutical Research, MU scientist Kattesh Katti, professor of radiology and physics in the School of Medicine and the College of Arts and Science, senior research scientist at the University of Missouri Research Reactor and director of the Cancer Nanotechnology Platform, and his research team combined gold salts with cinnamon and stirred the mixture in water to synthesize gold nanoparticles. This new method not only makes use of no poisonous materials, but it doesn't need any electricity, either.

While conducting their research, the scientists discovered that natural phytochemicals in cinnamon are released when the nanoparticles are created -- and these phytochemicals combined with gold nanoparticles form a promising treatment for cancer. That is because the phytochemicals are carried by the gold nanoparticles in to cancer cells and assist in the destruction or imaging of malignancies.

"From our work in green nanotechnology, it is clear that cinnamon -- and other species such as herbs, leaves and seeds -- will serve as a reservoir of phytochemicals and has the capability to convert metals in to nanoparticles," Dr. Katti said in a statement to the media. "Therefore, our approach to 'green' nanotechnology creates a renaissance symbolizing the indispensable role of Father Nature in all future nanotechnological developments."

Dr. Katti, who is the editor of The International Journal of Green Nanotechnology, added that as more makes use of for nanotechnology are created, it is crucial that scientists find ways to establish a workable connection between nanotechnology and green science.