Feed aggregator

First on-chip nanoscale optical quantum memory developed: Smallest-yet optical quantum memory device is a storage medium for optical quantum networks with the potential to be scaled up for commercial use

Nanotech-Now - September 19, 2017 - 7:45am
For the first time, an international team led by engineers at Caltech has developed a computer chip with nanoscale optical quantum memory.

Avalanche effect allows fast-acting phase-change memory

Nanotechweb - September 19, 2017 - 1:59am
Speed of phase transitions is affected by mechanical strain, meaning that voltage response can be tuned.

DNA sequences shape-shift hydrogels

Nanotechweb - September 18, 2017 - 4:20am
Potential applications include soft robotics and precision medicine.

Aluminium oxide film staves off battery ageing

Nanotechweb - September 18, 2017 - 2:52am
Epitaxial coating prevents performance fade by preserving electrode structure.

How to draw electricity from the bloodstream: A one-dimensional fluidic nanogenerator with a high power-conversion efficiency

Nanotech-Now - September 17, 2017 - 7:45am
Men build dams and huge turbines to turn the energy of waterfalls and tides into electricity. To produce hydropower on a much smaller scale, Chinese scientists have now developed a lightweight power g...

U of Illinois, NCSA Launch First US Nanomanufacturing Node - HPCwire (blog)

InterNano Industry News - September 17, 2017 - 3:45am
HPCwire (blog)U of Illinois, NCSA Launch First US Nanomanufacturing NodeHPCwire (blog)The University of Illinois at Urbana-Champaign together with the National Center for Supercomputing Applications (NCSA) have launched the United States's first computational node aimed at the development of nanomanufacturing simulation tools.
Categories: Nanotechnology News

Patent for one-of-a-kind process exfoliating pure graphene

InterNano Industry News - September 17, 2017 - 3:45am
Researchers have patented a one-of-a-kind process for exfoliating graphene in its pure (unoxidized) form, as well as manufacturing innovative graphene nanocomposites that have potential uses in a variety of applications.
Categories: Nanotechnology News

A nanotechnology approach to purifying liquid crystals

InterNano Industry News - September 17, 2017 - 3:45am
Liquid crystals used in modern devices such as laptops, tablets and smartphones typically contain a small fraction of ionic contaminants. These ion contaminants can originate from multiple sources during the chemical synthesis of materials, in the process of assembling the device, and in its daily use. In the case of LCDs, mobile ions in liquid crystals lead to such undesirable effects as image sticking, image flickering, and slow response. A promising solution to reduce the concentration of mobile ions in liquid crystal devices can be found by merging liquid crystals and nanotechnology.
Categories: Nanotechnology News

Molybdenum-Disulfide 2D Transistors Go Ballistic

InterNano Industry News - September 17, 2017 - 3:45am
<?xml version="1.0" encoding="UTF-8"?> 2D nanomaterial pulls ahead with working registers and latch circuits and devices that let electrons zip through unimpeded Image: Stanford University Molybdenum disulfide, a two dimensional semiconductor that’s just 3 atoms thick, has had a big year. In October, a group of researchers made a 1-nanometer transistor from the material, showing that even if silicon transistors stop shrinking, the new material might provide a path forward. In December, at the IEEE International Electron Devices Meeting in San Francisco, researchers presented work they say shows that molybdenum disulfide not only makes for superlative single transistors, but can be made into complex circuits using realistic manufacturing methods. At the meeting, a group from Stanford showed that transistors made from large sheets of MoS2 can be used to make transistors with 10-nanometer-long, gate having electronic properties that approach the material’s theoretical limits. The devices displayed traits close to ballistic conduction, a state of very low electrical resistance that allows the unimpeded flow of charge over relatively long distances—a phenomenon that should lead to speedy circuits. Separately, a team from MIT demonstrated complex circuit elements made from MoS2 transistors. Most of the work on molybdenum disulfide so far has been what Stanford electrical engineer Eric Pop calls “Powerpoint devices.” These one-off devices, made by hand in the lab, have terrific performance that looks great in a slide. This step is an important one, says Pop, but the 2D material is now maturing. Image: Stanford University The Stanford lab’s transistors are not as small as the record-breaking ones demonstrated in October. What’s significant, says group leader Pop, is that these latest transistors maintained similar performance even though they were made using more industrial-type techniques. Instead of using Scotch tape to peel off a layer of molybdenum disulfide from a rock of the material, then carefully placing it down and crafting one transistor at a time, Pop’s grad student started by growing a large sheet of the material on a wafer of silicon. In a transistor, a gate electrode switches the semiconductor channel between conducting and insulating states. In the Stanford device, the tricky part was coming up with an easy way to make a small gate atop the molybdenum disulfide without harming it, says Pop. That is, until his student, Christopher English, realized they could harness the power of rust. English chose a somewhat unusual material, aluminum, to serve as the gate electrode. He deposited a 20-nanometer finger of aluminum on the molybdenum, then allowed it to oxidize and shrink down to a smaller size. The gate ends up being about 10 nanometers. At these relatively small dimensions, the molybdenum disulfide transistors approach their ultimate electrical limit, a state called ballistic conduction. When a device is small enough (or at low enough temperature), electrons will travel through the conducting medium without scattering because of collisions with the atoms that make up the material. Transistors operating ballistically should switch very fast and enable high-performance processors. Pop estimates that about 1 in 5 electrons moves though the rusty transistors ballistically. By further improving the quality of the material (or making the transistors smaller), he expects that ratio to improve. The important thing, he says, is the way they achieved this: using methods that could translate to larger scales. “We have all the ingredients we need to scale this up,” says Pop. Zippy nanoscale transistors are great on their own, but they’re useful only if you can build them into circuits.  Researchers from MIT demonstrated just that by constructing working registers and latches. They managed the feat, says electrical engineer Dina El-Damak, by creating computer-aided design software tailored to MoS2. This sort of software is common in the silicon world and enables designers to come up with new circuits relatively easily. (El-Damak worked on the molybdenum disulfide project at MIT and is now a professor at the University of Southern California in Los Angeles.) Since molybdenum disulfide is so new, not many circuit designers have worked with the material. So far, most work has been done by trial and error, one device at a time. The MIT group can create an informed circuit design, using their computer models to simulate the best and worst cases, based on the material’s known properties and the performance of previous devices, says El-Damak. Then the group fabricates the design that seems most likely to work, tests its performance, and feeds the results back into the program. “By doing this, we have more confidence in scaling up this technology,” she says. Both Pop and El-Damak say molybdenum disulfide is unlikely to be a direct replacement for silicon. The material will either be used to build complementary systems on top of silicon chips, or it will be used on its own in flexible, transparent electronics. It’s also possible that some other 2D semiconductor will end up being a better option. Molybdenum disulfide is a few steps ahead because researchers have worked with it more than, say, tungsten selenide, and know how to grow the material over large areas. The Stanford and MIT research demonstrates important progress in this field, says Deji Akinwande, an electrical engineer at the University of Texas at Austin who co-chaired the IEDM session on 1D and 2D devices. People who work in industry are always asking when these materials will be made into useful circuits, and now it’s happening, he says. “Industry is starting to take this more seriously, now that it’s no longer just the grad student in the basement working on it,” he says.
Categories: Nanotechnology News

MIT awarded UNESCO Medal for contributions to nanoscience and nanotechnologies

InterNano Industry News - September 17, 2017 - 3:45am
MIT has been honored with the UNESCO Medal for contributions to the development of nanoscience and nanotechnologies by the United Nations Educational, Scientific and Cultural Organization (UNESCO). Established in 2010, the UNESCO Medal has awarded over 30 prominent scientists and public figures for their individual contributions to advancing the fields of nanoscience and nanotechnologies. This year MIT shares the distinction, along with St. Petersburg State University of Information Technologies in Russia, of being the first organization to be recognized. In addition to the two universities, four eminent scientists from Korea, the United Arab Emirates, Ukraine, and the United Kingdom, were recipients of the medal. An awards ceremony was held on Oct. 11 at the UNESCO headquarters in Paris, France. Institute Professor Mildred (Millie) Dresselhaus, a nanoscience pioneer who herself has won many recognitions including the U.S. Presidential Medal of Freedom and the L'Oreal-UNESCO Award for Women in Science, made the trip at the invitation of President Rafael Reif to accept the medal on behalf of MIT. “Using science and technology as a way to bring people together is something MIT has learned to do really well,” says Dresselhaus. “Our faculty, staff, and students come together from countries all over the world with diverse technical backgrounds to work across the many academic departments and laboratories on campus. This culture of interdisciplinary collaboration enables us to work for common goals, so it made sense to me that MIT was recognized as an institution. This should serve as encouragement to move forward as rapidly as possible to complete MIT.nano and to achieve some exceptionally great outcomes through this initiative as it comes to fruition.” The award will eventually be displayed within the public spaces of MIT.nano — the 214,000-square-foot center for nanoscience and nanotechnology that is currently under construction in the heart of the MIT campus — after the building opening in June 2018, says Vladimir Bulović, faculty lead of the project. The UNESCO Medal is an initiative of the International Commission responsible for developing the Encyclopedia of Life Support Systems theme on nanoscience and nanotechnologies. Each year, the medal recognizes those making significant contributions in the field in an effort to showcase the tremendous benefits of progress being made. MIT joins a distinguished group of scientists who have received the medal thus far, including Nobel Prize-winners in physics Zhores Alferov and Isamu Akasaki.
Categories: Nanotechnology News

Nano: a cleaner option?

InterNano Industry News - September 17, 2017 - 3:45am
Could nanotechnology tidy up the planet without leaving a dangerous residue of its own?It's likely that you've recently swirled nanotechnology down your sink. Antimicrobial silver nanoparticles, for example, are added to food containers, socks, and cleaning products such as floor polish. But could nanoparticles – measuring less than 100 nanometres wide – clean more than just your house? Could nanotechnology tidy up the planet without leaving a dangerous residue of its own?The European Environment Agency estimates that "potentially polluting activities" have occurred at nearly three million EU sites. But nanoparticles could remediate water, soil and air polluted by compounds such as heavy metals and aromatic hydrocarbons. With high reactivity and a larger surface area than the same mass of material in a larger form, nanoparticles are prime candidates for capturing and destroying pollutants. Continue reading...
Categories: Nanotechnology News

Researchers print graphene-like materials with inkjet

InterNano Industry News - September 17, 2017 - 3:45am
New black phosphorous inks are compatible with conventional inkjet printing techniques for optoelectronics and photonics.
Categories: Nanotechnology News

New nanotechnology reporting rule from EPA

InterNano Industry News - September 17, 2017 - 3:45am
EPA issues guidance for new nanotechnology reporting and recordkeeping rule.
Categories: Nanotechnology News

UMass Amherst unveils high-tech labs - The Recorder

InterNano Industry News - September 17, 2017 - 3:45am
The RecorderUMass Amherst unveils high-tech labsThe RecorderThe five laboratories opened to the public Friday serve a large number of purposes that manufacturers will find appealing: roll-to-roll fabrication for nanomanufacturing; 3-D printing for wearable medical devices and biosensors; verification of those ...
Categories: Nanotechnology News

New Orleans Startup Advano Accepted Into YCombinator - Silicon Bayou News (press release) (blog)

InterNano Industry News - September 17, 2017 - 3:45am
New Orleans Startup Advano Accepted Into YCombinatorSilicon Bayou News (press release) (blog)Advano makes batteries better by making silicon nanomanufacturing affordable. The company has also hired six people and expanded to a 1,500 square foot office at the University of New Orleans. To date, the company has raised $800,000 to continue its ...
Categories: Nanotechnology News

Nanoscale honeycomb structures used in low-cost carbon monoxide sensor

InterNano Industry News - September 17, 2017 - 3:45am
Researchers have developed a highly sensitive, low-cost nanosensor that can quickly detect minute changes in carbon monoxide levels, with potential applications in environmental pollution monitoring.
Categories: Nanotechnology News

A high-resolution transfer printing method for graphene inks

InterNano Industry News - September 17, 2017 - 3:45am
Researchers have demonstrated here a transfer printing method based on a hydrophobic mold suitable for high-resolution patterning of graphene inks.
Categories: Nanotechnology News

Breathable, wearable nanomesh electronics on skin for long-term health monitoring

InterNano Industry News - September 17, 2017 - 3:45am
New nanomesh structure lets skin breathe, prevents inflammation.
Categories: Nanotechnology News

Researchers develop fast, cheap method to make supercapacitor electrodes for electric cars, high-powered lasers

InterNano Industry News - September 17, 2017 - 3:45am
A team of engineers thinks they've come up with a process for manufacturing supercapacitor electrode materials that will meet stringent industrial and usage demands.
Categories: Nanotechnology News

Nanomaterials strengthen 3D-printed parts

InterNano Industry News - September 17, 2017 - 3:45am
Scientists discovered a way to make 3-D printed parts stronger and immediately useful in real-world applications.
Categories: Nanotechnology News