Nano planet

Study reveals new method to develop more efficient drugs

Physorg.com - 7 июля, 2015 - 15:30
A new study led by University of Kentucky researchers suggests a new approach to develop highly-potent drugs which could overcome current shortcomings of low drug efficacy and multi-drug resistance in the treatment of cancer as well as viral and bacterial infections.
Категории: Nano planet

Tiny wires could provide a big energy boost

Physorg.com - 7 июля, 2015 - 13:56
Wearable electronic devices for health and fitness monitoring are a rapidly growing area of consumer electronics; one of their biggest limitations is the capacity of their tiny batteries to deliver enough power to transmit data. Now, researchers at MIT and in Canada have found a promising new approach to delivering the short but intense bursts of power needed by such small devices.
Категории: Nano planet

Graphene sheets enable ultrasound transmitters

Physorg.com - 7 июля, 2015 - 13:14
University of California, Berkeley, physicists have used graphene to build lightweight ultrasonic loudspeakers and microphones, enabling people to mimic bats or dolphins' ability to use sound to communicate and gauge the distance and speed of objects around them.
Категории: Nano planet

Could black phosphorus be the next silicon?

Physorg.com - 7 июля, 2015 - 12:00
As scientists continue to hunt for a material that will make it possible to pack more transistors on a chip, new research from McGill University and Université de Montréal adds to evidence that black phosphorus could emerge as a strong candidate.
Категории: Nano planet

Project uses crowd computing to improve water filtration

Physorg.com - 6 июля, 2015 - 19:42
Nearly 800 million people worldwide don't have access to safe drinking water, and some 2.5 billion people live in precariously unsanitary conditions, according to the Centers for Disease Control and Prevention. Together, unsafe drinking water and the inadequate supply of water for hygiene purposes contribute to almost 90% of all deaths from diarrheal diseases—and effective water sanitation interventions are still challenging scientists and engineers.
Категории: Nano planet

Surfing a wake of light: Researchers observe and control light wakes for the first time

Physorg.com - 6 июля, 2015 - 19:37
When a duck paddles across a pond or a supersonic plane flies through the sky, it leaves a wake in its path. Wakes occur whenever something is traveling through a medium faster than the waves it creates—in the duck's case water waves, in the plane's case shock waves, otherwise known as sonic booms.
Категории: Nano planet

Nanomedicine in the fight against thrombotic diseases

Physorg.com - 6 июля, 2015 - 16:48
Future Science Group (FSG) today announced the publication of a new article in Future Science OA, covering the use of nanocarriers and microbubbles in drug delivery for thrombotic disease.
Категории: Nano planet

Engineering the world's smallest nanocrystal

Physorg.com - 6 июля, 2015 - 15:20
In the natural world, proteins use the process of biomineralization to incorporate metallic elements into tissues, using it to create diverse materials such as seashells, teeth, and bones. However, the way proteins actually do this is not well understood.
Категории: Nano planet

A stretchy mesh heater for sore muscles

Physorg.com - 3 июля, 2015 - 16:55
If you suffer from chronic muscle pain a doctor will likely recommend for you to apply heat to the injury. But how do you effectively wrap that heat around a joint? Korean Scientists at the Center for Nanoparticle Research, Institute for Basic Science (IBS) in Seoul, along with an international team, have come up with an ingenious way of creating therapeutic heat in a light, flexible design.
Категории: Nano planet

Polymer mold makes perfect silicon nanostructures

Physorg.com - 3 июля, 2015 - 13:35
Using molds to shape things is as old as humanity. In the Bronze Age, the copper-tin alloy was melted and cast into weapons in ceramic molds. Today, injection and extrusion molding shape hot liquids into everything from car parts to toys.
Категории: Nano planet

Scientists use nanoparticles to shut down mechanism that drives cancer growth

Physorg.com - 3 июля, 2015 - 12:32
When scientists develop cancer therapies, they target the features that make the disease deadly: tumor growth, metastasis, recurrence and drug resistance. In epithelial cancers—cancers of the breast, ovaries, prostate, skin and bladder, which begin in the organs' lining—these processes are controlled by a genetic program called epithelial–mesenchymal transition.
Категории: Nano planet

Better memory with faster lasers

Physorg.com - 2 июля, 2015 - 15:11
DVDs and Blu-ray disks contain so-called phase-change materials that morph from one atomic state to another after being struck with pulses of laser light, with data "recorded" in those two atomic states. Using ultrafast laser pulses that speed up the data recording process, Caltech researchers adopted a novel technique, ultrafast electron crystallography (UEC), to visualize directly in four dimensions the changing atomic configurations of the materials undergoing the phase changes. In doing so, they discovered a previously unknown intermediate atomic state—one that may represent an unavoidable limit to data recording speeds.
Категории: Nano planet

New technology using silver may hold key to electronics advances

Physorg.com - 2 июля, 2015 - 14:56
Engineers at Oregon State University have invented a way to fabricate silver, a highly conductive metal, for printed electronics that are produced at room temperature.
Категории: Nano planet

Quantum-dot spectrometer is small enough to function within a smartphone

Physorg.com - 2 июля, 2015 - 10:09
Instruments that measure the properties of light, known as spectrometers, are widely used in physical, chemical, and biological research. These devices are usually too large to be portable, but MIT scientists have now shown they can create spectrometers small enough to fit inside a smartphone camera, using tiny semiconductor nanoparticles called quantum dots.
Категории: Nano planet

NIST 'how-to' website documents procedures for nano-EHS research and testing

Physorg.com - 1 июля, 2015 - 18:48
As engineered nanomaterials increasingly find their way into commercial products, researchers who study the potential environmental or health impacts of those materials face a growing challenge to accurately measure and characterize them. These challenges affect measurements of basic chemical and physical properties as well as toxicology assessments.
Категории: Nano planet

New micro-supercapacitor structure inspired by the intricate design of leaves

Physorg.com - 1 июля, 2015 - 16:30
There was a time during the early development of portable electronics when the biggest hurdle to overcome was making the device small enough to be considered portable. After the invention of the microprocessor in the early 1970s, miniature, portable electronics have become commonplace and ever since the next challenge has been finding an equally small and reliable power source. Chemical batteries store a lot of energy but require a long period of time for that energy to charge and discharge plus have a limited lifespan. Capacitors charge quickly but cannot store enough charge to work for long enough to be practical. One possible solution is something called a solid-state micro-supercapacitor (MSC). Supercapacitors are armed with the power of a battery and can also sustain that power for a prolonged period time. Researchers have attempted to create MSCs in the past using various hybrids of metals and polymers but none were suitable for practical use. In more recent trials using graphene and carbon nanotubes to make MSCs, the results were similarly lackluster.
Категории: Nano planet

Calculations confirm that surface flaws are behind fluorescence intermittency in silicon nanocrystals

Physorg.com - 1 июля, 2015 - 12:59
Quantum dots are nanoparticles of semiconductor that can be tuned to glow in a rainbow of colors. Since their discovery in the 1980s, these remarkable nanoparticles have held out tantalizing prospects for all kinds of new technologies, ranging from paint-on lighting materials and solar cells to quantum computer chips, biological markers, and even lasers and communications technologies.
Категории: Nano planet

Chitosan coated, chemotherapy packed nanoparticles may target cancer stem cells

Physorg.com - 30 июня, 2015 - 18:17
Nanoparticles packed with a clinically used chemotherapy drug and coated with an oligosaccharide derived from the carapace of crustaceans might effectively target and kill cancer stem-like cells, according to a recent study led by researchers at The Ohio State University Comprehensive Cancer Center - Arthur G. James Cancer Hospital and Richard J. Solove Research Institute (OSUCCC - James).
Категории: Nano planet

Researchers develop new biodegradable silicon transistor based on a material derived from wood

Physorg.com - 30 июня, 2015 - 18:00
Portable electronics users tend to upgrade their devices frequently as new technologies offering more functionality and more convenience become available. A report published by the U.S. Environmental Protection Agency in 2012 showed that about 152 million mobile devices are discarded every year, of which only 10 percent is recycled—a legacy of waste that consumes a tremendous amount of natural resources and produces a lot of trash made from expensive and non-biodegradable materials like highly purified silicon.
Категории: Nano planet

Atomic force microscope advance leads to new breast cancer research

Physorg.com - 30 июня, 2015 - 16:06
Researchers who developed a high-speed form of atomic force microscopy have shown how to image the physical properties of live breast cancer cells, for the first time revealing details about how deactivation of a key protein may lead to metastasis.
Категории: Nano planet