Nanotechnology
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May 23 | News
Ion bombardment of metal surfaces is an important, but poorly understood, nanomanufacturing technique. New research using sophisticated supercomputer simulations has shown what goes on in trillionths of a second. The advance could lead to better ways to predict the phenomenon and more uses of the technique to make new nanoscale products.
May 21 | News
A
year-long evaluation of the effect of quantum dots in primates has
found the nanoparticles to be safe, encouraging doctors and scientists
who are hoping to use them to battle diseases like cancer. Cadmium
selenide quantum dots were the variety used in the study.
May 18 | News
University
at Buffalo researchers are making significant progress on rust-proofing
steel using a graphene-based composite that could serve as a nontoxic
alternative to coatings that contain hexavalent chromium, a probable
carcinogen.
May 18 | News
Joshua
Zide has spent nearly a decade engineering nanomaterials using
molecular beam epitaxy. His particular area of expertise are
metalllic-semiconductor nanocomposite for use in electronics, and he is
now working on a variation of epitaxy that he hopes will bring the
materials deposition technique to the production line for the first
time.
May 14 | News
There's
nothing worse than a shonky pool table with an unseen groove or bump
that sends your shot off course. A new study has found that the same
goes at the nano-scale, where the "billiard balls" are tiny electrons
moving across a "table" made of the semiconductor gallium arsenide.
May 11 | News
A
French-American collaboration has developed a new combination of
polymers that makes it possible to design ultra-thin films capable of
self-organization with a 5-nm resolution. These hybrid copolymers are
based on sugars and oil-based macromolecules. Previous attempts using
nothing but oil-based molecules were limited to 20 nm in thickness.
May 10 | News
After
studies involving advanced simulations of nanoscale magnetic and
materials phenomena, a team of scientists in Germany have proposed
making use of magnetic moments in chains of iron atoms to allow
information to be transported on the nanoscale in a fast and
energy-efficient manner. The scheme, demonstrated in experiments, would
work over a wide temperature range, remaining largely unaffected by
external magnetic fields.
May 9 | News
A
detailed description of development of the first practical device that
mimics the process of photosynthesis has recently been published in an
American Chemical Society journal. Unlike earlier devices, which used
costly ingredients, the new device is made from inexpensive materials
and employs low-cost engineering and manufacturing processes.
May 9 | News
Gallium
nitride, a semiconductor material found in bright lights since the
1990s, is used in wireless applications because of its high efficiency
and high voltage operation. However, it’s difficult to remove heat from
GaN electronics, which limits applications and markets. Researchers at
the University of California, Riverside, have made a material from
graphene that does the job, and it looks a lot like a patterned quilt.
May 9 | News
White-light
quantum dots made from cadmium selenide can convert blue light produced
by a light-emitting diode into a warm white light similar to that
generated by an incandescent bulb. But their performance has been poor
until recent development breakthroughs have improved efficiency from
just 3% originally to as high as 45%.
