Tue, 28 Mar 2017 11:26:11 EDTExpanding the potential of gold nanoparticles for a range of uses requires methods to stabilize the clusters and control their size. Researchers at KAUST reveal how simple organic citrate ions, derived from readily available citric acid, can interact with the gold atoms to yield the stable nanoparticles needed for further research.
Tue, 28 Mar 2017 10:08:17 EDTSwirling objects known as magnetic vortices and skyrmions can be miniaturized without sacrificing mobility, a KAUST-led international research team has found. These findings are relevant for future "race-track" memory technologies that feature massive densities of moveable magnetic bits.
Tue, 28 Mar 2017 09:48:50 EDTUsing sunlight to drive chemical reactions, such as artificial photosynthesis, could soon become much more efficient thanks to nanomaterials.
Tue, 28 Mar 2017 05:59:43 EDTA new nanoscale sensor has been developed that can help detect cytokines—molecules that play a critical role in cellular response to infection, inflammation, trauma and disease.
Mon, 27 Mar 2017 16:19:06 EDTResearchers at Aalto University have manufactured artificial materials with engineered electronic properties. By moving individual atoms under their microscope, the scientists were able to create atomic lattices with a predetermined electrical response. The possibility to precisely arrange the atoms on a sample bring 'designer quantum materials' one step closer to reality. By arranging atoms in a lattice, it becomes possible to engineer the electronic properties of the material through the atomic structure.
Mon, 27 Mar 2017 12:19:55 EDTMeasuring brain activity with precision is essential to developing further understanding of diseases such as epilepsy and disorders that affect brain function and motor control. Neural probes with high spatial resolution are needed for both recording and stimulating specific functional areas of the brain. Now, researchers from the Graphene Flagship have developed a new device for recording brain activity in high resolution while maintaining excellent signal to noise ratio (SNR). Based on graphene field-effect transistors, the flexible devices open up new possibilities for the development of functional implants and interfaces.
Mon, 27 Mar 2017 12:19:27 EDTFor the last few decades, microchip manufacturers have been on a quest to find ways to make the patterns of wires and components in their microchips ever smaller, in order to fit more of them onto a single chip and thus continue the relentless progress toward faster and more powerful computers. That progress has become more difficult recently, as manufacturing processes bump up against fundamental limits involving, for example, the wavelengths of the light used to create the patterns.
Mon, 27 Mar 2017 11:55:32 EDTMacromolecules regularly fold and unfold themselves inside cells. Their diverse three-dimensional structures help determine their functions. Understanding molecule folding can shed light on complex physical processes that may influence diseases, cancers and allergies.
Mon, 27 Mar 2017 08:40:25 EDTSize really does matter when it comes to the mechanisms that cells use to communicate with each other, according to pioneering new nanobiotechnology research which has important implications for the diagnosis and treatment of disease.
Mon, 27 Mar 2017 08:39:36 EDTThe usual way of cultivating cells is to use a flat laboratory dish of glass. However, inside a human body, the cells do not grow on a flat surface, but rather in three dimensions. This has lead researchers at Lund University in Sweden to develop a porous "spaghetti" of tissue-friendly polymers with cavities in which the cells can develop in a more natural way.
Mon, 27 Mar 2017 08:25:52 EDTOne of the biggest challenges to society today is finding clean, safe and affordable forms of energy. Scientists at the University of Maryland are working on developing novel technologies to solve such challenges, including Marina Leite, an Assistant Professor in the Department of Materials Science and Engineering and in the Institute for Research in Electronics and Applied Physics, and her team. Solar energy, which is harnessed from the light/heat of the sun, is an especially important source of renewable energy.
Mon, 27 Mar 2017 06:24:26 EDTWith graphene, Rutgers researchers have discovered a powerful way to cool tiny chips – key components of electronic devices with billions of transistors apiece.
Fri, 24 Mar 2017 09:30:01 EDT(Phys.org)—Researchers have demonstrated that ice crystals will grow along straight lines in a controlled way on microgrooved surfaces. Compared to the random formation of ice crystals on smooth surfaces, the ice on the microgrooved surfaces forms more slowly and melts more quickly, which could lead to improved anti-icing and deicing methods. Ice formation is currently a major problem in a wide variety of areas, including solar panels, refrigeration systems, power transmission systems, and aircraft, and the new surface may help reduce ice build-up in these systems.
Fri, 24 Mar 2017 08:31:55 EDTThe National Physical Laboratory (NPL) has developed a novel measurement method, providing simultaneous topographical, electrical, chemical and optical microscopy (STEOM) at the nanoscale for the first time. The new method can be used to optimise the performance of optoelectronic devices such as organic solar cells, sensors and transistors.
Fri, 24 Mar 2017 05:31:29 EDTNanocars will compete for the first time ever during an international molecule-car race on April 28-29, 2017 in Toulouse (south-western France). The vehicles, which consist of a few hundred atoms, will be powered by minute electrical pulses during the 36 hours of the race, in which they must navigate a racecourse made of gold atoms, and measuring a maximum of a 100 nanometers in length. They will square off beneath the four tips of a unique microscope located at the CNRS's Centre d'élaboration de matériaux et d'études structurales (CEMES) in Toulouse. The race, which was organized by the CNRS, is first and foremost a scientific and technological challenge, and will be broadcast live on the YouTube Nanocar Race channel. Beyond the competition, the overarching objective is to advance research in the observation and control of molecule-machines.
Thu, 23 Mar 2017 17:11:44 EDTRice University scientists have created an efficient, simple-to-manufacture oxygen-evolution catalyst that pairs well with semiconductors for solar water splitting, the conversion of solar energy to chemical energy in the form of hydrogen and oxygen.
Thu, 23 Mar 2017 14:00:08 EDTFlorian Praetorius and Prof. Hendrik Dietz of the Technical University of Munich (TUM) have developed a new method that can be used to construct custom hybrid structures using DNA and proteins. The method opens new opportunities for fundamental research in cell biology and for applications in biotechnology and medicine.
Thu, 23 Mar 2017 09:20:32 EDTThe ability to deliver cargo like drugs or DNA into cells is essential for biological research and disease therapy but cell membranes are very good at defending their territory. Researchers have developed various methods to trick or force open the cell membrane but these methods are limited in the type of cargo they can deliver and aren't particularly efficient.
Thu, 23 Mar 2017 05:54:49 EDTEngineers from the University of Glasgow, who have previously developed an 'electronic skin' covering for prosthetic hands made from graphene, have found a way to use some of graphene's remarkable physical properties to use energy from the sun to power the skin.
Wed, 22 Mar 2017 12:03:01 EDTSolar cells and photodetectors could soon be made from new types of materials based on semiconductor quantum dots, thanks to new insights based on ultrafast measurements capturing real-time photoconversion processes.
Wed, 22 Mar 2017 08:42:34 EDTScientists have succeeded in 'filming' inter-molecular chemical reactions – using the electron beam of a transmission electron microscope (TEM) as a stop-frame imaging tool. They have also discovered that the electron beam can be simultaneously tuned to stimulate specific chemical reactions by using it as a source of energy as well as an imaging tool.
Wed, 22 Mar 2017 08:35:31 EDTMaterials scientists at the TU Darmstadt are imprinting nano-patterns in metals, a technology that could give metallic surfaces permanent functionality, like a lotus effect or reduced frictional properties.
Wed, 22 Mar 2017 08:20:28 EDTA simple, green method that applies a protective coating to semiconductors could help to develop these materials for many applications, from batteries to biosensors.
Wed, 22 Mar 2017 07:41:00 EDTChemists from Russia and Switzerland created biosafe luminescent nanoparticles for imaging tumors and blood vessels damaged by heart attack or stroke. The particles are made of hafnium oxide that is used for intravenous injection, and doped with ions of rare earth metals. The scientists hope to create an alternative to toxic quantum dots and image deep tissues without harming the patient. The study appeared in Colloids and Surfaces B: Biointerfaces.
Tue, 21 Mar 2017 17:13:37 EDTPrinceton researchers have discovered a new form of the simple compound GeSe that has surprisingly escaped detection until now. This so-called beta-GeSe compound has a ring type structure like graphene and its monolayer form could have similarly valuable properties for electronic applications, according to the study published in the Journal of the American Chemical Society.
Tue, 21 Mar 2017 12:22:15 EDTThe thinnest, smoothest layer of silver that can survive air exposure has been laid down at the University of Michigan, and it could change the way touchscreens and flat or flexible displays are made.
Tue, 21 Mar 2017 09:10:15 EDTA research team led by Professor Flavio Maran of the University of Padova (Italy) and Academy Professor Kari Rissanen of the University of Jyväskylä (Finland) has published in the prestigious the Journal of the American Chemical Society a study that demonstrates how it is possible to obtain very high quality crystals formed of gold nanoparticles.
Tue, 21 Mar 2017 08:50:01 EDTSince their discovery in 1895, X-rays have led to significant advances in science, medicine and industry. From probing distant galaxies to screening at airport security and facilitating medical diagnosis, they have allowed us to look beyond the surface and see what lies beneath.
Tue, 21 Mar 2017 06:36:03 EDTBiophysicists from Utrecht University have developed a strategy for using light-emitting nanocrystals as a marker in living cells. By recording the movements of these quantum dots, they can clarify the structure and dynamics of the cytoskeleton. Their findings were published today in Nature Communications.
Tue, 21 Mar 2017 06:35:20 EDTRewarded with a Nobel Prize in Chemistry in 2016, nanomachines provide mechanical work on the smallest of scales. Yet at such small dimensions, molecular motors can complete this work in only one direction. Researchers from the CNRS's Institut Charles Sadron, led by Nicolas Giuseppone, a professor at the Université de Strasbourg, working in collaboration with the Laboratoire de mathématiques d'Orsay (CNRS/Université Paris-Sud), have succeeded in developing more complex molecular machines that can work in one direction and its opposite. The system can even be controlled precisely, in the same way as a gearbox. The study was published in Nature Nanotechnology on March 20, 2017.