Nano planet

Uncovering the mechanism of photoluminescence stabilization in semiconductor nanoparticles

Physorg.com - 19 июня, 2015 - 15:20
A collaborative of Korean researchers has discovered the mechanism of photoluminescence (PL) loss from semiconductor nanoparticles called quantum dots (QDs) and proposed an effective method for stabilization of PL.
Категории: Nano planet

Modeling how thin films break up

Physorg.com - 19 июня, 2015 - 14:22
Excess surface energy from unsatisfied bonds is a significant driver of dimensional changes in thin-film materials, whether formation of holes, contracting edges, or run-away corners. In general, this break-up of a material is known as dewetting. Recent MIT graduate Rachel V. Zucker, who received her PhD on June 5, has developed a range of mathematical solutions to explain various dewetting phenomena in solid films.
Категории: Nano planet

Chemical vapor deposition enables production of pure, uniform coatings of metals or polymers

Physorg.com - 19 июня, 2015 - 14:00
In a sense, says MIT chemical engineering professor Karen Gleason, you can trace the technology of chemical vapor deposition, or CVD, all the way back to prehistory: "When the cavemen lit a lamp and soot was deposited on the wall of a cave," she says, that was a rudimentary form of CVD.
Категории: Nano planet

Adapting nanoscience imaging tools to study ants' heat-deflecting adaptations

Physorg.com - 19 июня, 2015 - 13:40
The tiny hairs of Saharan silver ants possess crucial adaptive features that allow the ants to regulate their body temperatures and survive the scorching hot conditions of their desert habitat. According to a new research paper published in the journal Science, the unique triangular shape and internal structure of the hairs play a key role in maintaining the ant's average internal temperature below the critical thermal maximum of 53.6 degrees Celsius (128.48 degrees Fahrenheit) most of the time despite midday Saharan temperatures that can reach up to 70°C (158°F).
Категории: Nano planet

Unique reducers and new hydrocarbon synthesis methods for five new calcium carbides

Physorg.com - 19 июня, 2015 - 13:30
A team led by MIPT Professor Artem Oganov has used computer simulation to predict the existence of five completely new compounds of carbon and calcium with varied chemical and physical properties, obtaining two of them by experiment. The journal Nature Communications has published an article featuring the results of the study.
Категории: Nano planet

Biomedical breakthrough: Carbon nanoparticles you can make at home

Physorg.com - 18 июня, 2015 - 19:21
Researchers have found an easy way to produce carbon nanoparticles that are small enough to evade the body's immune system, reflect light in the near-infrared range for easy detection, and carry payloads of pharmaceutical drugs to targeted tissues.
Категории: Nano planet

Engineers find a simple yet clever way to boost chip speeds

Physorg.com - 18 июня, 2015 - 02:05
A typical computer chip includes millions of transistors connected with an extensive network of copper wires. Although chip wires are unimaginably short and thin compared to household wires both have one thing in common: in each case the copper is wrapped within a protective sheath.
Категории: Nano planet

Toward nanorobots that swim through blood to deliver drugs

Physorg.com - 18 июня, 2015 - 01:59
Someday, treating patients with nanorobots could become standard practice to deliver medicine specifically to parts of the body affected by disease. But merely injecting drug-loaded nanoparticles might not always be enough to get them where they need to go. Now scientists are reporting in the ACS journal Nano Letters the development of new nanoswimmers that can move easily through body fluids to their targets.
Категории: Nano planet

A new look at surface chemistry

Physorg.com - 18 июня, 2015 - 01:57
For the first time in the long and vaunted history of scanning electron microscopy, the unique atomic structure at the surface of a material has been resolved. This landmark in scientific imaging was made possible by a new analytic technique developed by a multi-institutional team of researchers, including scientists from the U.S. Department of Energy (DOE)'s Lawrence Berkeley National Laboratory (Berkeley Lab).
Категории: Nano planet

Hooked on phonons: Research group measures graphene vibrations

Physorg.com - 17 июня, 2015 - 16:10
An international research group led by scientists at the National Institute of Standards and Technology's (NIST) Center for Nanoscale Science and Technology has developed a method for measuring crystal vibrations in graphene. Understanding these vibrations is a critical step toward controlling future technologies based on graphene, a one-atom thick form of carbon.
Категории: Nano planet

Nanoparticles to kill cancer cells with heat

Physorg.com - 17 июня, 2015 - 16:00
Heat may be the key to killing certain types of cancer, and new research from a team including National Institute of Standards and Technology (NIST) scientists has yielded unexpected results that should help optimize the design of magnetic nanoparticles that can be used to deliver heat directly to cancerous tumors.
Категории: Nano planet

High-tech nanofibres could help nutrients in food hit the spot

Physorg.com - 17 июня, 2015 - 13:31
New research outlines how the creation of 'nanofibres' could provide new and improved products and delivery systems for supplementary foodstuffs.
Категории: Nano planet

Nanoparticles naturally present left- and right-handed versions

Physorg.com - 17 июня, 2015 - 12:22
A team of scientists from ITMO University and Trinity College Dublin published first experimental results showing that ordinary nanocrystals possess intrinsic chirality and can be produced under normal conditions as a half-and-half mixture of mirror images of each other. The discovery of this fundamental property in nanocrystals opens new horizons in nano- and bio-technology and medicine, for instance, in such applications as targeted drug delivery. The results of the study were published in Nano Letters.
Категории: Nano planet

Graphene heat-transfer riddle unraveled

Physorg.com - 17 июня, 2015 - 00:46
Researchers have solved the long-standing conundrum of how the boundary between grains of graphene affects heat conductivity in thin films of the miracle substance—bringing developers a step closer to being able to engineer films at a scale useful for cooling microelectronic devices and hundreds of other nano-tech applications.
Категории: Nano planet

Researchers create transparent, stretchable conductors using nano-accordion structure

Physorg.com - 16 июня, 2015 - 16:00
Researchers from North Carolina State University have created stretchable, transparent conductors that work because of the structures' "nano-accordion" design. The conductors could be used in a wide variety of applications, such as flexible electronics, stretchable displays or wearable sensors.
Категории: Nano planet

Graphene gets bright: World's thinnest lightbulb developed

Physorg.com - 15 июня, 2015 - 18:00
Led by Young Duck Kim, a postdoctoral research scientist in James Hone's group at Columbia Engineering, a team of scientists from Columbia, Seoul National University (SNU), and Korea Research Institute of Standards and Science (KRISS) reported today that they have demonstrated—for the first time—an on-chip visible light source using graphene, an atomically thin and perfectly crystalline form of carbon, as a filament. They attached small strips of graphene to metal electrodes, suspended the strips above the substrate, and passed a current through the filaments to cause them to heat up. The study, "Bright visible light emission from graphene," is published in the Advance Online Publication on Nature Nanotechnology's website on June 15.
Категории: Nano planet

Research team develops the first flexible phase-change random access memory

Physorg.com - 15 июня, 2015 - 17:17
Phase change random access memory (PRAM) is one of the strongest candidates for next-generation nonvolatile memory for flexible and wearable electronics. In order to be used as a core memory for flexible devices, the most important issue is reducing high operating current. The effective solution is to decrease cell size in sub-micron region as in commercialized conventional PRAM. However, the scaling to nano-dimension on flexible substrates is extremely difficult due to soft nature and photolithographic limits on plastics, thus practical flexible PRAM has not been realized yet.
Категории: Nano planet

Researchers grind nanotubes to get nanoribbons

Physorg.com - 15 июня, 2015 - 16:43
A simple way to turn carbon nanotubes into valuable graphene nanoribbons may be to grind them, according to research led by Rice University.
Категории: Nano planet

Graphene quantum dot LEDs

Physorg.com - 15 июня, 2015 - 15:18
The first graphene quantum dot light-emitting diodes (GQD-LEDs), fabricated by using high-quantum-yield graphene quantum dots through graphite intercalation compounds, exhibit luminance in excess of 1,000 cd/m2.
Категории: Nano planet

Researchers use nanotubes to better understand diseases

Physorg.com - 11 июня, 2015 - 12:46
Researchers in UC's Department of Cancer Biology are collaborating with material scientists from the University of Houston to create and use nanotubes to capture and understand the regulation of proteins involved in a variety of diseases including certain cancers, cardiovascular diseases and obesity.
Категории: Nano planet