It looks like a Slinky suspended in motion. Yet this photonics advancement, called a metamaterial hyperlens, doesn’t climb down stairs. Instead, it improves our ability to see tiny objects. The hyperlens may someday help detect some of the most lethal forms of cancer.
Physicists have developed an innovative method that could enable the efficient use of...
Computer simulations have predicted a new phase of matter: atomically thin 2-D liquid. This...
Ever since single-layer graphene burst onto the science scene in 2004, the possibilities for the promising material have seemed nearly endless. With its high electrical conductivity, ability to store energy, and ultra-strong and lightweight structure, graphene has potential for many applications in electronics, energy, the environment and even medicine.
Researchers have found a way to couple the properties of different 2-D materials to provide an exceptional degree of control over light waves. They say this has the potential to lead to new kinds of light detection, thermal management systems and high-resolution imaging devices.
Researchers from Swinburne Univ. of Technology and the Univ. of Science and Technology of China have developed a low-cost technique that holds promise for a range of scientific and technological applications. They have combined laser printing and capillary force to build complex, self-assembling microstructures using a technique called laser printing capillary-assisted self-assembly (LPCS).
A microsupercapacitor designed by scientists at Rice Univ. that may find its way into personal and even wearable electronics is getting an upgrade. The laser-induced graphene device benefits greatly when boron becomes part of the mix. The Rice lab of chemist James Tour uses commercial lasers to create thin, flexible supercapacitors by burning patterns into common polymers.
Nanoengineers at the Univ. of California, San Diego developed a gel filled with toxin-absorbing nanosponges that could lead to an effective treatment for skin and wound infections caused by MRSA, an antibiotic-resistant bacteria. This "nanosponge-hydrogel" minimized the growth of skin lesions on mice infected with MRSA, without the use of antibiotics.
Nanoscale materials feature extraordinary, billionth-of-a-meter qualities that transform everything from energy generation to data storage. But while a nanostructured solar cell may be fantastically efficient, that precision is notoriously difficult to achieve on industrial scales. The solution may be self-assembly, or training molecules to stitch themselves together into high-performing configurations.
One of the barriers to using graphene at a commercial scale could be overcome using a method demonstrated by researchers at Oak Ridge National Laboratory. Graphene, a material stronger and stiffer than carbon fiber, has enormous commercial potential but has been impractical to employ on a large scale, with researchers limited to using small flakes of the material.
Rice Univ. scientists have found a way to simplify the manufacture of solar cells by using the top electrode as the catalyst that turns plain silicon into valuable black silicon. Black silicon is silicon with a highly textured surface of nanoscale spikes or pores that are smaller than the wavelength of light. The texture allows the efficient collection of light from any angle, at any time of day.
Inspired by the way iridescent bird feathers play with light, scientists have created thin films of material in a wide range of pure colors with hues determined by physical structure rather than pigments. Structural color arises from the interaction of light with materials that have patterns on a minute scale, which bend and reflect light to amplify some wavelengths and dampen others.
Pollutants emitted by factories and car exhausts affect humans who breathe in these harmful gases and also aggravate climate change up in the atmosphere. Being able to detect such emissions is a critically needed measure. New research has developed an efficient way to improve methods for detecting polluting emissions using a sensor at the nanoscale.
Researchers at the Univ. of Georgia have developed an inexpensive way to manufacture extraordinarily thin polymer strings commonly known as nanofibers. These polymers can be made from natural materials like proteins or from human-made substances to make plastic, rubber or fiber, including biodegradable materials.
A new technique invented at Massachusetts Institute of Technology can measure the relative positions of tiny particles as they flow through a fluidic channel, potentially offering an easy way to monitor the assembly of nanoparticles, or to study how mass is distributed within a cell. With further advancements, this technology has the potential to resolve the shape of objects in flow as small as viruses, the researchers say.
Physicists were able to show, for the first time, that the nuclear spins of single molecules can be detected with the help of magnetic particles at room temperature. The researchers describe a novel experimental setup with which the tiny magnetic fields of the nuclear spins of single biomolecules could be registered for the first time.
An international research group led by scientists at NIST has developed a technique for creating nanoscale whispering galleries for electrons in graphene. The development opens the way to building devices that focus and amplify electrons just as lenses focus light and resonators (like the body of a guitar) amplify sound.
Scientists from the MESA+ Institute for Nanotechnology at the Univ. of Twente in the Netherlands and Thales Research & Technology, France, have found a way to control heat propagation in photonic nano-sized devices, which will be used for high speed communications and quantum information technologies.
For faster, longer-lasting water filters, some scientists are looking to graphene to serve as ultra-thin membranes, filtering out contaminants to quickly purify high volumes of water. Graphene’s unique properties make it a potentially ideal membrane for water filtration or desalination. But there’s been one main drawback to its wider use.
Researchers experimentally demonstrated that patterning of magnetic materials into arrays of nanoscale dots can lead to a very strong and highly controllable modification of the polarization of light when the beam reflects from the array. This discovery could increase the sensitivity of optical components for telecommunication and biosensing applications.
In a study that could open doors for new applications of photonics from molecular sensing to wireless communications, Rice Univ. scientists have discovered a new method to tune the light-induced vibrations of nanoparticles through slight alterations to the surface to which the particles are attached.
Imagine taking strands of DNA and using it to build tiny structures that can deliver drugs to targets within the body or take electronic miniaturization to a whole new level. While it may still sound like science fiction to most of us, researchers have been piecing together and experimenting with DNA structures for decades.
Researchers have developed an inexpensive technique called “microcombing” to align carbon nanotubes, which can be used to create large, pure CNT films that are stronger than any previous such films. The technique also improves the electrical conductivity that makes these films attractive for use in electronic and aerospace applications.
To the list of potential applications of graphene we can now add valleytronics, the coding of data in the wave-like motion of electrons as they speed through a conductor. Lawrence Berkeley National Laboratory researchers have discovered topologically protected 1-D electron conducting channels at the domain walls of bilayer graphene. These conducting channels are “valley polarized".
A team of researchers from Lawrence Livermore National Laboratory and Univ. of California, Davis, have found that covering an implantable neural electrode with nanoporous gold could eliminate the risk of scar tissue forming over the electrode’s surface. The team demonstrated that the nanostructure of nanoporous gold achieves close physical coupling of neurons by maintaining a high neuron-to-astrocyte surface coverage ratio.
Researchers at the Univ. of Rochester have shown that defects on an atomically thin semiconductor can produce light-emitting quantum dots. The quantum dots serve as a source of single photons and could be useful for the integration of quantum photonics with solid-state electronics: a combination known as integrated photonics.
What if peanut brittle, under certain conditions, behaved like taffy? Something like that happens to a 2-D dichalcogenide analyzed by scientists at Rice Univ. Rice researchers calculated that atomically thin layers of molybdenum disulfide can take on the qualities of plastic through exposure to a sulfur-infused gas at the right temperature and pressure.
The probe of an atomic force microscope (AFM) scans a surface to reveal details at a resolution 1,000 times greater than that of an optical microscope. That makes AFM the premier tool for analyzing physical features, but it cannot tell scientists anything about chemistry. For that they turn to the mass spectrometer.
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