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Latest Nanocrystal Stories

nanoparticle growth
2014-03-30 06:06:44

Deutsches Elektronen-Synchrotron (DESY) Analysis allows tailoring materials for switchable windows and solar cells With DESY’s X-ray light source PETRA III, Danish scientists observed the growth of nanoparticles live. The study shows how tungsten oxide nanoparticles are forming from solution. These particles are used for example for smart windows, which become opaque at the flick of a switch, and they are also used in particular solar cells. The team around lead author Dr. Dipankar...

Size Matters When Nanocrystals Go Through Phases
2013-08-26 15:35:09

Lawrence Berkeley National Laboratory Berkeley Lab Researchers at the Molecular Foundry Reveal Fundamental Size-Dependence of Metal Nanocrystals Undergoing Phase Transitions Understanding what happens to a material as it undergoes phase transformations – changes from a solid to a liquid to a gas or a plasma – is of fundamental scientific interest and critical for optimizing commercial applications. For metal nanocrystals, assumptions about the size-dependence of phase...

Size Matters In Nanocrystals' Ability To Adsorb And Release Gases
2013-08-07 08:02:53

Vanderbilt University More efficient catalytic converters on autos, improved batteries and more sensitive gas sensors are some of the potential benefits of a new system that can directly measure the manner in which nanocrystals adsorb and release hydrogen and other gases. The technique, which was developed by Vanderbilt University Assistant Professor of Chemical and Biomolecular Engineering Rizia Bardhan, is described in a paper published online Aug. 4 by the journal Nature Materials....

Tiny Silicon Crystals Could Be Safe For Deep-tissue Imaging
2013-07-31 13:54:50

University at Buffalo Tiny silicon crystals caused no health problems in monkeys three months after large doses were injected, marking a step forward in the quest to bring such materials into clinics as biomedical imaging agents, according to a new study. The findings, published online July 10 in the journal ACS Nano, suggest that the silicon nanocrystals, known as quantum dots, may be a safe tool for diagnostic imaging in humans. The nanocrystals absorb and emit light in the...

Coveted Nanocrystal Process Simplified
2013-06-25 12:29:07

Helmholtz-Zentrum Dresden-Rossendorf A formation mechanism of nanocrystalline cerium dioxide (CeO2), a versatile nanomaterial, has been unveiled by scientists from the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) and the University of New South Wales in Sydney, Australia. The research results were published in the scientific journal Chemistry – A European Journal. This finding potentially simplifies and alleviates the existing synthetic processes of nanocrystalline CeO2 production....

Gold Nanocrystal Vibration Captured On Billion-frames-per-second Film For First Time
2013-05-24 07:22:10

[ Watch The Video Movie of 3D Image of a Gold Nanocrystal ] University College London The film, which was made using 3D imaging pioneered at the London Centre for Nanotechnology (LCN) at UCL, reveals important information about the composition of gold. The findings are published in the journal Science. Jesse Clark, from the LCN and lead author of the paper said: "Just as the sound quality of a musical instrument can provide great detail about its construction, so too can the...

2013-05-13 12:47:50

Quantum dots are tiny nanocrystals with extraordinary optical and electrical properties with possible uses in dye production, bioimaging, and solar energy production. Researchers at the University of Illinois at Chicago have developed a way to introduce precisely four copper ions into each and every quantum dot. The introduction of these "guest" ions, called doping, opens up possibilities for fine-tuning the optical properties of the quantum dots and producing spectacular colors. "When...

Microwave Oven Used To Cook Up Solar Cell Material
2013-05-06 09:16:00

University of Utah Nanocrystal semiconductor for photovoltaics, medical sensors, heat reuse University of Utah metallurgists used an old microwave oven to produce a nanocrystal semiconductor rapidly using cheap, abundant and less toxic metals than other semiconductors. They hope it will be used for more efficient photovoltaic solar cells and LED lights, biological sensors and systems to convert waste heat to electricity. Using microwaves "is a fast way to make these particles that...

2012-12-14 12:27:50

When materials are stressed, they eventually change shape. Initially these changes are elastic, and reverse when the stress is relieved. When the material's strength is exceeded, the changes become permanent. This could result in the material breaking or shattering, but it could also re-shape the material, such as a hammer denting a piece of metal. Understanding this last group of changes is the focus of research from a team including Carnegie's Ho-kwang "Dave" Mao. Their breakthrough...

Researchers Create Flexible Nano-Sized Electronic Circuits
2012-11-27 13:50:59

Michael Harper for redOrbit.com — Your Universe Online Scientists have been finding ways to shrink electronic circuits ever since they were first invented. But no matter how small these circuits get, they´ve been largely confined to rigid surfaces, typically silicon. Now, one University of Pennsylvania team have set out to free the electronic circuit from its stiff and rigid existence and, just as many other researchers have been doing in recent years, they looked to...


Word of the Day
mundungus
  • A stinking tobacco.
  • Offal; waste animal product; organic matter unfit for consumption.
This word comes from the Spanish 'mondongo,' tripe, entrails.