Quantum Dots

Quantum ghosts are helpful

harminka — Mon, 27 Apr 2009 10:46:59 -0500

The idea that far distant particles can somehow 'talk' to each other worried Einstein so much that he called it 'spooky action at a distance'.

Visualizing atomic-scale acoustic wavesin nanostructures

harminka — Fri, 04 Jul 2008 10:48:34 -0500

Acoustic waves play many everyday roles - from communication between people to ultrasound imaging. Now the highest frequency acoustic waves in materials, with nearly atomic-scale wavelengths, promise to be useful probes of nanostructures such as LED lights.

Quantum dots can penetrate skin through minor abrasions

harminka — Thu, 03 Jul 2008 08:12:52 -0500

Researchers at North Carolina State University have found that quantum dot nanoparticles can penetrate the skin if there is an abrasion, providing insight into potential workplace concerns for healthcare workers or individuals involved in the manufacturing of quantum dots or doing research on potential biomedical applications of the tiny nanoparticles.

Gene silence, quantum dots reduce protein production to whisper

harminka — Tue, 24 Jun 2008 03:51:25 -0500

More than 15 years ago scientists discovered a way to stop a particular gene in its tracks. The Nobel Prize-winning finding holds tantalizing promise for medical science, but so far it has been difficult to apply the technique, known as RNA interference, in living cells.

Microwave synthesis connects with the quantum dots

harminka — Fri, 13 Jun 2008 12:34:47 -0500

Materials researchers at the National Institute of Standards and Technology (NIST) have developed a simplified, low-cost process for producing high-quality, water-soluble "quantum dots" for biological research.

Europe gets together to harness quantum physics

harminka — Thu, 05 Jun 2008 10:33:08 -0500

The long cherished goal of applying the strange properties of quantum mechanics to the macroscopic world we inhabit has been brought closer by a series of recent developments.

Advancing Nanoparticle Technology Creating Opportunities for Drug Developers

mksmith — Tue, 03 Jun 2008 12:24:35 -0500

New Survey by Greystone Associates Examines Technology, Therapeutic and Market Factors

Measuring movement of nanomaterials in simple model food chain

harminka — Sat, 31 May 2008 03:38:31 -0500

New research shows that while engineered nanomaterials can be transferred up the lowest levels of the food chain from single celled organisms to higher multicelled ones, the amount transferred was relatively low and there was no evidence of the nanomaterials concentrating in the higher level organisms.

JILA solves problem of quantum dot 'blinking'

harminka — Thu, 24 Jan 2008 05:56:37 -0600

Quantum dots—tiny, intense, tunable sources of colorful light—are illuminating new opportunities in biomedical research, cryptography and other fields. But these semiconductor nanocrystals also have a secret problem, a kind of nervous tic. They mysteriously tend to “blink” on and off like Christmas tree lights, which can reduce their usefulness.

New quantum dot transistor counts individual photons

harminka — Fri, 12 Oct 2007 13:12:17 -0500

A transistor containing quantum dots that can count individual photons (the smallest particles of light) has been designed and demonstrated at the National Institute of Standards and Technology (NIST).

Researcher studies what makes quantum dots blink

harminka — Fri, 05 Oct 2007 05:40:48 -0500

In order to learn more about the origins of quantum dot blinking, researchers from the U.S. Department of Energy's Argonne National Laboratory, the University of Chicago and the California Institute of Technology have developed a method to characterize it on faster time scales than have previously been accessed.

Researchers set new record for brightness of quantum dots

harminka — Wed, 26 Sep 2007 10:15:06 -0500

By placing quantum dots on a specially designed photonic crystal, researchers at the University of Illinois have demonstrated enhanced fluorescence intensity by a factor of up to 108. Potential applications include high-brightness light-emitting diodes, optical switches and personalized, high-sensitivity biosensors.