Search results for “Nanocrystal”

Wireless nanocrystals efficiently radiate visible light

Researchers developed wireless nanocrystals that emit visible light by pumping them with a nearby quantum well, improving efficiency over traditional fluorescent bulbs. The process produces white light through varying the size of quantum dots, paving the way for more efficient white-light-emitting diodes.

SourceDOE/Sandia National Laboratories·JournalNature·DateJun 22, 2004

Gold-tipped nanocrystals developed by Hebrew University

Researchers at Hebrew University create gold-tipped nanocrystals that offer a solution to problems of building nanoscale transistors and electronic circuits. These nanodumbbells provide strong chemical bonds between the gold and semiconductor, leading to good electrical connectivity.

SourceThe Hebrew University of Jerusalem·JournalScience·DateJun 17, 2004

Pumping energy to nanocrystals from a quantum well

Researchers at Los Alamos National Laboratory have developed a new method for transferring non-contact energy to nanocrystals from a quantum well. This enables the efficient production of light with controlled color, opening up possibilities for hybrid quantum-well/nanocrystal devices and applications in solar cells.

SourceDOE/Los Alamos National Laboratory·JournalNature·DateJun 11, 2004

Sandia/UNM self-assembly process forms durable nanocrystal arrays and independent nanocrystals

Researchers at Sandia National Laboratories and the University of New Mexico developed a simple method to form durable nanocrystal arrays using a self-assembly process. The arrays can be used for biological labeling, laser light, catalysts, memory storage, and relief for physicists. The technique also enables the creation of independen...

SourceDOE/Sandia National Laboratories·JournalScience·DateApr 26, 2004

Electricity controls nanocrystal shape

Researchers at Argonne National Laboratory developed a method to control the architecture of nanocrystals using electrochemistry. They created nearly 30 different nanostructures by changing applied voltages and chemical types, offering greater predictability and convenience compared to traditional methods.

SourceDOE/Argonne National Laboratory·JournalJournal of the American Chemical Society·DateMar 17, 2004

For 'quantum confinement' size matters, but so does shape

The study finds that the shape of a semiconductor nanocrystal can significantly impact its electronic and optical properties. The researchers developed a novel synthesis method to create indium phosphide nanowires with controlled diameters, allowing them to investigate the effect of two-dimensional vs. three-dimensional confinement.

SourceWashington University in St. Louis·JournalNature Materials·DateOct 13, 2003

Technological breakthrough in silicon photonics

Researchers at the Max Planck Institute have developed a novel technique for tailoring silicon nanocrystals on 4-inch wafers, enabling the mass production of these tiny crystals. By controlling the size and position of the nanocrystals, the team aims to improve the efficiency of light-emitting devices such as LEDs.

SourceMax-Planck-Gesellschaft·DateAug 27, 2003

3-D imaging inside living organism, using quantum dots

Researchers at Cornell University developed a new approach to using quantum dots for biological studies of living animals, achieving high-resolution three-dimensional images inside living tissue. The technique, known as multiphoton microscopy with quantum-dot imaging, outperforms conventional methods by 1,000 times in brightness and re...

SourceCornell University·JournalScience·DateMay 29, 2003

Plastic LEDs break telecommunications barrier

Researchers at Technion-Israel Institute of Technology have created plastic LEDs that can efficiently produce near-infrared radiation, a crucial component for high-speed fiber optic communications. The new technology has the potential to cut costs and increase efficiency, paving the way for global networks in homes.

SourceAmerican Society for Technion - Israel Institute of Technology·JournalScience·DateFeb 21, 2002

Computer chips found to possess explosive properties useful for chemical analysis and nanoscale sensors

Researchers at UCSD have discovered that silicon wafers can be easily made into tiny explosives, ideal for rapid chemical analysis of toxic metals. The explosives can also be used as power sources for micro-electrical mechanical systems, enabling the creation of self-destructing devices.

SourceUniversity of California - San Diego·JournalAdvanced Materials·DateJan 9, 2002