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Quantum simulation 2.0: Atoms chat long distance: Physicists have measured long-range magnetic interactions between ultracold particles

Nanotech-Now - April 13, 2016 - 7:45am
Simulations are a popular tool to study physical processes that cannot be investigated experimentally in detail. For example, scientists are challenged to investigate physical processes in materials s...

Dressed to kill: Tailoring a suit for tumor-penetrating cancer meds

Nanotech-Now - April 13, 2016 - 7:45am
For more than a decade, biomedical researchers have been looking for better ways to deliver cancer-killing medication directly to tumors in the body. Tiny capsules, called nanoparticles, are now being...

New magnetism research brings high-temp superconductivity applications closer

Nanotech-Now - April 13, 2016 - 7:45am
A research team led by the U.S. Department of Energy's (DOE) Argonne National Laboratory has discovered that only half the atoms in some iron-based superconductors are magnetic, providing a conclusive...

Theory consultancy catalyses big business opportunities

Nanotechweb - April 13, 2016 - 4:38am
Nanolayers Research Computing, a young company specializing in modelling and simulations, as well as evolutionary algorithms, and neural networks, has signed a multimillion euro agreement for catalyst development.

Thomas Swan Team up with Plessey And DelStar International to Develop Commercial Applications for Graphene

InterNano Industry News - April 13, 2016 - 3:45am
Government grants awarded to leading Graphene manufacturer in top class development partnerships. Thomas Swan is pleased to announce the recent award of additional Innovate UK funding for two new...
Categories: Nanotechnology News

Tin Oxide: The First Stable p-type 2-D Semiconductor Material

InterNano Industry News - April 13, 2016 - 3:45am
<?xml version="1.0" encoding="UTF-8"?> Photo: Dan Hixson/University of Utah College of Engineering Researchers at the University of Utah have developed the first stable intrinsic p-type (carrying positive charges) 2-D semiconductor material, tin oxide. If this semiconductor is mated with a n-type (carrying electrons) 2-D semiconductor in a transistor, it opens up the possibility of building power-saving two-dimensional complementary logic circuits like the ones in microprocessors today. "Now we have everything—we have p-type 2-D semiconductors and n-type 2-D semiconductors," said Ashutosh Tiwari, an associate professor at the University of Utah and the leader of the research, in a press release. "Now things will move forward much more quickly." The potential for 2-D materials—such as graphene and molybdenum disulfide—as an alternative to the three-dimensional silicon, raises hopes for smaller, faster, lower-power transistors. However, the path to success for these 2-D materials in transistors has not always been clear, whether it be issues such as graphene not being a natural semiconductor or the charge carrier traps that compromise molybdenum disulfide. But possibly the biggest issue has been that all previous 2-D materials have only been stable n-type semiconductors. It has been possible to dope other 2-D materials, such as molybdenum disulfide and tungsten diselenide, to behave as p-type. However, this new tin oxide represents the first intrinsic p-type semiconductor in a 2D material. In research described in the journal Advanced Electronic Materials , the Utah University researchers overcame this limitation by layering 2-D tin oxide (SnO) onto a sapphire-and-silicon-dioxide (SiO2) substrate. The researchers were then able to fabricate a few field-effect transistors (FETs) from it. With this development, the attractive properties of 2-D materials in transistors are more fully exploitable. For instance, in 2-D materials charge transport is basically confined to a single plane, meaning electrical and thermal transport properties that can be much better than those of bulk silicon. That could mean chips that consume less power and throw-off less heat. In an e-mail interview, Tiwari said that the next step in their research will be to build a CMOS (complementary metal oxide semiconductor) using their new p-type 2-D semiconductor. This post was corrected on 18 February to indicate that some 2-D materials could act as p-type semiconductors when doped.
Categories: Nanotechnology News

Electrically controlling valley carriers in 2D materials

Nanotechweb - April 13, 2016 - 3:30am
An important step forward to making “valleytronics” devices for next-generation electronics and computing.

Physicists discover flaws in superconductor theory: A chink in the 'theoretical armor' of how superconductors trap and hold a magnetic field led to a discovery by a group of University of Houston physicists that may open the door to using 'trapped field m

Nanotech-Now - April 11, 2016 - 7:45am
University of Houston physicists report finding major theoretical flaws in the generally accepted understanding of how a superconductor traps and holds a magnetic field. More than 50 years ago, C.P. B...

National Space Society Applauds SpaceX First Stage Barge Landing and Successful Launch of CRS8/BEAM to the ISS

Nanotech-Now - April 11, 2016 - 7:45am
With a successful launch on April 8 at 4:43 PM EST, 2016 SpaceX achieved several dramatic milestones on their first supply run to the International Space Station (ISS) following the loss of a Falcon 9...

A single ion impacts a million water molecules

Nanotech-Now - April 11, 2016 - 7:45am
Water is simple and complex at the same time. A single water molecule (H20) is made up of only 3 atoms. Yet the collective behavior of water molecules is unique and continues to amaze us. Water molecu...

Intracellular recordings using nanotower electrodes: Nanoscale-tipped high-aspect-ratio vertical microneedle electrodes for intracellular recordings

Nanotech-Now - April 11, 2016 - 7:45am
Our current understanding of how the brain works is very poor. The electrical signals travel around the brain and throughout the body, and the electrical properties of the biological tissues are studi...

ORNL neutron 'splashes' reveal signature of exotic particles

Nanotech-Now - April 11, 2016 - 7:45am
Researchers at the Department of Energy's Oak Ridge National Laboratory used neutrons to uncover novel behavior in materials that holds promise for quantum computing. The findings, published in Nature...

Catalyst could make production of key chemical more eco-friendly

Nanotech-Now - April 11, 2016 - 7:45am
The world has more carbon dioxide than it needs, and a team of Brown University chemists has come up with a potential way to put some of it to good use.

ORNL tracks how halogen atoms compete to grow 'winning' perovskites

Nanotech-Now - April 11, 2016 - 7:45am
Researchers at the Department of Energy's Oak Ridge National Laboratory have found a potential path to further improve solar cell efficiency by understanding the competition among halogen atoms during...

UCSB researchers identify specific defects in LED diodes that lead to less efficient solid state lighting

Nanotech-Now - April 11, 2016 - 7:45am
Using state-of-the-art theoretical methods, UCSB researchers have identified a specific type of defect in the atomic structure of a light-emitting diode (LED) that results in less efficient performanc...

Nanopillars on drone fly larvae allow them to avoid bacterial contamination

Nanotech-Now - April 11, 2016 - 7:45am
The immature stage of the drone fly (Eristalis tenax) is known as a "rat-tailed maggot" because it resembles a hairless baby rodent with a "tail" that is actually used as a breathing tube. Rat-tailed...

Stanford scientists improve perovskite solar-cell absorbers by giving them a squeeze

Nanotech-Now - April 11, 2016 - 7:45am
Solar cells made of artificial metallic crystalline structures called perovskites have shown great promise in recent years. Now Stanford University scientists have found that applying pressure can cha...

Nanoporous material breathes out when it breathes in

Nanotechweb - April 11, 2016 - 3:37am
Counterintuitive behaviour of new metal-organic framework structure might help in the development of new types of micropneumatic devices, switches and mechanical actuators.