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Bumpy surfaces, graphene beat the heat in devices: Rice University theory shows way to enhance heat sinks in future microelectronics
Bumpy surfaces with graphene between would help dissipate heat in next-generation microelectronic devices, according to Rice University scientists.
Deepa Sritharan and Elisabeth Smela Department of Mechanical Engineering, University of Maryland, College Park, MD 20742, USA Institute for Systems Research, University of Maryland, College Park,...
Nanobiotix Provides Update on Global Development of Lead Product NBTXR3: Seven clinical trials across the world: More than 2/3 of STS patients recruited in the act.in.sarc Phase II/III trial: Phase I/II prostate cancer trial now recruiting in the U.S.
NANOBIOTIX (Euronext: NANO ISIN: FR0011341205), a late clinical-stage nanomedicine company pioneering novel approaches for the local treatment of cancer, today provides an update on the global devel...
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts...
New electrode material might be useful in applications such as portable electronics devices, electric vehicles and for storing renewable energy on the grid scale.
NewsCell phones and Apple watches could last a little longer due to a new method to create copper nanowires. Contributed Author: Lawrence Livermore National LaboratoryTopics: Nanotechnology
<?xml version="1.0" encoding="UTF-8"?> A novel molecule changes the game in flexible nonvolatile memory, potentially ushering a new era in wearable electronics Illustration: Paolo Samori/University of Strasbourg & CNRS Irradiation with either blue or green light is used to respectively "write" or "erase" information on a flexible transistor device. The molecular switch contained in a semiconducting polymer matrix undergoes reversible interconversion between its two forms, interacting (trapping) or not with the current flowing through the semiconductor. A regular stream of breakthroughs with organic nanomaterials for use in flexible electronics has observers scratching their heads as to why we aren’t seeing more of these technologies in applications such as wearable electronics. The problem has been that although organic nanomaterials have made flexible logic circuits and displays possible, they have pretty much failed to yield flexible, nonvolatile memories with write/erase speeds that would make them practical. Now a team of researchers hailing from the University of Strasbourg and the Centre National de la Recherche Scientifique (CNRS) in France, along with collaborators from Humboldt University of Berlin and the University of Nova Gorica, in Slovenia, has developed a flexible nonvolatile optical memory thin-film transistor device made from organic nanomaterials that may change the game in wearable electronics. To date, the major challenge in developing flexible organic memories has been creating a stable system that doesn’t lose data over time (volatility), is flexible, and offers an acceptable number of write/erase cycles (endurance). The international research team overcame all of those hurdles, but they wanted more. “We wanted every single device to be able to store more than just a single bit (multilevel operation); we achieved 8 bits,” said Emanuele Orgiu, a researcher at CNRS and one of the authors of the paper, in an email interview with IEEE Spectrum. “In addition, our devices can be made from solutions directly on a plastic substrate, and they feature very fast response times (within nanoseconds)—an intensely sought-after property for organic semiconductors, which usually exhibit very long response times (greater than a millisecond),” added Orgiu. In a paper published in the journal Nature Nanotechnology , the team explains that it was able to achieve all of this by fabricating the device from molecules known as diarylethenes (DAEs), which can be switched between two states (called either open or closed form). Switching from writing to erasing was as simple as adjusting the wavelength of the light hitting the material (blue light for writing, green for erasing). “The DAEs used in our work are particularly suited for nonvolatile data storage, since their two forms are stable at ambient conditions,” explained Tim Leydecker, another researcher from CNRS who is a member of the research team. “Plus, they can be switched even when embedded within a semiconducting polymer matrix, making them an ideal candidate for flexible films.” explains that the molecules’ fast response to a 3-nanosecond laser pulse is relevant to modern electronics. Another benefit of the DAE molecules is that the amount of molecules that are switched in reaction to the light can be precisely controlled, which is a key requirement for multi-level storage that improves the data density. Paolo Samorì, another team member from CRNS, explained that the molecules’ fast response to a 3-nanosecond laser pulse brings them right in line with modern electronics. Samorì added that another benefit of the DAE molecules is that the number of molecules that are switched in reaction to the light can be precisely controlled—a key requirement for improved data density in multilevel storage. The devices they have fabricated so far are laboratory prototypes, and thus are relatively large at 1 square millimeter. Needless to say, miniaturization and encapsulation will need to be addressed in order for these memories to become a commercial product. However, the rearchers already have these issues in their sights, and plan to continue testing the performance and stability of the devices after encapsulation. The team will also be examining fabrication processes compatible with industrial output, such as roll-to-roll manufacturing and inkjet printing. Stefan Hecht, a team member from Humboldt University of Berlin, added: “Implementation into electronics featuring other organic components (organic light-emitting diodes and organic field-effect transistors) is an important step, as the entire system would benefit from the advantages of organic electronics.”
Researchers have developed a novel type of “buckypaper” – a thin film composed of carbon nanotubes – that has better thermal and electrical properties than most types of buckypaper previously developed. Researchers believe the innovative buckypaper could be used to create ultra-lightweight composite materials for numerous aerospace and energy applications, including advanced lightning strike protection on airplanes and more powerful lithium-ion batteries. Read More...
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With the recent publication on the 2016 National Nanotechnology Initiative (NNI) strategic plan last month, we are provided insight on refinements o Jeff Morse, Ph.D.
Single wall carbon nanotubes are one of the most effective conductive additives – they are able to significantly increase electrical and thermal conductivity, and to improve the mechanical properti OCSiAl News
A Polish-British team of physicists has constructed and tested a compact, efficient converter capable of modifying the quantum properties of individual photons. The new device should facilitate the co...
Leti and Grenoble Partners Demonstrate Worlds 1st Qubit Device Fabricated in CMOS Process: Paper by Leti, Inac and University of Grenoble Alpes Published in Nature Communications
Leti, an institute of CEA Tech, along with Inac, a fundamental research division of CEA, and the University of Grenoble Alpes have achieved the first demonstration of a quantum-dot-based spin qubit us...
Scientists shrink electron gun to matchbox size: Terahertz technology has the potential to enable new applications
In a multi-national effort, an interdisciplinary team of researchers from DESY and the Massachusetts Institute of Technology (MIT) has built a new kind of electron gun that is just about the size of a...
Micro-bubbles make big impact: Research team develops new ultrasound-powered actuator to develop micro robot
The quest to develop a wireless micro-robot for biomedical applications requires a small-scale "motor" that can be wirelessly powered through biological media. While magnetic fields can be used to pow...
From champagne bubbles, dance parties and disease to new nanomaterials: Understanding nucleation of protein filaments might help with Alzheimer's Disease and type 2 Diabetes
Whether it is clouds or champagne bubbles forming, or the early onset of Alzheimer's disease or Type 2 diabetes, a common mechanism is at work: nucleation processes.
Uncovering the secrets of friction on graphene: Sliding on flexible graphene surfaces has been uncharted territory until now
Graphene, a two-dimensional form of carbon in sheets just one atom in thick, has been the subject of widespread research, in large part because of its unique combination of strength, electrical conduc...
Supersonic spray yields new nanomaterial for bendable, wearable electronics: Film of self-fused nanowires clear as glass, conducts like metal
A new, ultrathin film that is both transparent and highly conductive to electric current has been produced by a cheap and simple method devised by an international team of nanomaterials researchers fr...