Scientists have long sought to
use nanowires in batteries.
HP: Typically,
we use nanowires with ~ 100 nm in diameter.
He first designed a system that
uses nanowires coated with bacteria.
The team set up an aluminium superconductor and built an escape route for the electrons
using nanowires.
Na, Y.R., Kim, S.Y., Gaublomme, J.T., Shalek, A.K., Jorgollia, M., Park, H. and Yang, E.G., «Probing Enzymatic Activity inside Living Cells
Using a Nanowire − Cell «Sandwich» Assay,» Nano Lett., 13, 153 (2013).
HP: What we have shown so far is that we can indeed introduce a variety of different biochemicals into neurons, neuronal networks and now even tissues
using these nanowires in a spatially selected fashion.
The process works through a mixture of steps
using nanowires and bacteria that work together to mimic the photosynthesis process that plants use to turn carbon dioxide into food and the byproduct, oxygen.
For this new battery, the researchers
used nanowires, which are highly conductive and have a large surface area, making them great at holding charge as electrodes.
Not exact matches
A team of researchers at UCI had been experimenting with
nanowires for potential
use in batteries, but found that over time the thin, fragile wires would break down and crack after too many charging cycles.
Their paper published on March 22 by the Proceedings of the National Academy of Sciences highlights research that offers a new understanding of how these bacteria may
use «
nanowires» to accomplish the electronic feat.
The
nanowires collect sunlight, much like the light - absorbing layer on a solar panel, and the bacteria
use the energy from that sunlight to carry out chemical reactions that turn carbon dioxide into a liquid fuel such as isopropanol.
Using epitaxy, the semiconductor
nanowires can then be grown atom for atom out of these holes.»
The
nanowires are produced by a company in Sweden and this new information can be
used to tweak the layer structure in the
nanowires.
Silver
nanowires have drawn significant interest in recent years for
use in many applications, ranging from prosthetic devices to wearable health sensors, due to their flexibility, stretchability and conductive properties.
While proof - of - concept experiments have been promising, there have been significant challenges to printing highly integrated circuits
using silver
nanowires.
«Given the technique's efficiency, direct writing capability, and scalability, we're optimistic that this can be
used to advance the development of flexible, stretchable electronics
using silver
nanowires — making these devices practical from a manufacturing perspective,» Zhu says.
The researchers have
used the new technique to create prototypes that make
use of the silver
nanowire circuits, including a glove with an internal heater and a wearable electrode for
use in electrocardiography.
The researchers studied
nanowires using X-ray microscopy and with this method they can pinpoint exactly how the
nanowire should be designed to give the best properties.
Last year, the same team led by USC Viterbi electrical engineering professor Chongwu Zhou developed a successful anode design
using porous silicon
nanowires that allowed the material to expand and contract without breaking, effectively solving the pulverization problem.
Researchers at North Carolina State University have developed a new technique that allows them to print circuits on flexible, stretchable substrates
using silver
nanowires.
Using a compact but powerful laser to heat arrays of ordered
nanowires, CSU scientists and collaborators have demonstrated micro-scale nuclear fusion in the lab.
These proteins can be
used to precipitate gold from a solution, craft aluminum
nanowires to form semiconductors, or soak up dyes or heavy metals from contaminated water, according to researchers.
«Before we can put this discovery to
use and make an actual device, we have many more studies to do, including determining how to separate out the individual
nanowires, and overcoming technical challenges to manufacturing and mass production,» Kim said.
In the presented experiment they formed intersections
using the same kinds of
nanowire so that four of these intersections form a «hashtag», #, and thus create a closed circuit along which Majoranas are able to move.
«These
nanowires are about 10 times smaller than the smallest silicon wires, and, if
used in future technology, would result in powerful energy - efficient devices,» Kim said.
The new approach
uses yarns, made from
nanowires of the element niobium, as the electrodes in tiny supercapacitors (which are essentially pairs of electrically conducting fibers with an insulator between).
Yarn made of niobium
nanowires, seen here in a scanning electron microscope image (background), can be
used to make very efficient supercapacitors, MIT researchers have found.
A separate group in Zhang's lab accomplished a similar feat
using silver
nanowires embedded in a solid base.
Previously it has been shown that the chirality can be manipulated by applying magnetic fields to complicated
nanowire geometries, but the
use of magnetic fields is wasteful of energy and limits the ability to address individual domain walls selectively.
A team of Korean researchers, affiliated with Ulsan National Institute of Science and Technology (UNIST) has recently pioneered in developing a new simple
nanowire manufacturing technique that
uses self - catalytic growth process assisted by thermal decomposition of natural gas.
In a study, reported in the January 21, 2016 issue of Nano Letters, the team demonstrated a new redox - responsive assembly method to synthesize hierarchically structured carbon - sheathed germanium
nanowires (c - GeNWs) on a large scale by the
use of self - catalytic growth process assisted by thermally decomposed natural gas.
A team of Korean researchers, affiliated with UNIST has recently pioneered in developing a new simple
nanowire manufacturing technique that
uses self - catalytic growth process assisted by thermal decomposition of natural gas.
Small magnetic domain wall structures in
nanowires can be
used to store information and, for example, can be
used as angle sensors.
An experiment that, by design, was not supposed to turn up anything of note instead produced a «bewildering» surprise, according to the Stanford scientists who made the discovery: a new way of creating gold nanoparticles and
nanowires using water droplets.
In the information technology world, nanoprinting could be
used to achieve the controlled placement of catalytic seed particles for growing semiconducting
nanowires.
It will help advance the development of nanoscale biosensors and ultratiny lenses that can bend light inside future optical chips as well as the fabrication of
nanowires that could be
used to build more advanced computer chips, researchers report in Nature Nanotechnology.
One group at Lund University in Sweden has been able to kick - start the spontaneous growth of «forests» of 1000 - nm - high «
nanowire trees»,
using 50 - nm - wide clusters of gold as a catalyst, and a gallium phosphide substrate.
DNA and viruses are already commonly in
use to build
nanowires of inorganic materials, he says.
Wang and his team looked at creating a
nanowire material that was flexible, easily manufactured and environmentally friendly and could cool with an electric field safe for human
use.
Their vertically aligned ferroelectric barium strontium titanate
nanowire array can cool about 5.5 degrees Fahrenheit
using 36 volts, an electric field level safe for humans.
The researchers
use a template so all the
nanowires grow perpendicular to the glass» surface and to the same height.
Also, it is
used as
nanowires in electrical measurement technology.
A study in the journal Nature Materials details the creation of a
nanowire - based technology that absorbs solar energy at comparable levels to currently available systems while
using only 1 percent of the silicon material needed to capture photons.
The germanium
nanowires produced by this method have superior electronic properties compared to silicon and can be
used as high - capacity anode material for lithium - ion batteries, but the
nanowires were previously too expensive and difficult to produce.
This approach allowed them to lithographically define oxide templates and fill them via epitaxy, in the end making
nanowires, cross junctions, nanostructures containing constrictions and 3 - D stacked
nanowires using the already established scaled processes of Si technology.
It was confirmed when they
used a strain of Geobacter genetically altered to prevent it from producing
nanowires, and the process did not work.
Gallium nitride
nanowires, however, don't experience the same sort of crystal strain, so scientists hope to
use them as tunable, broad - spectrum light sources.
«While silver
nanowires have been
used in touch screens before, no one has tried to combine them with graphene.
It would be relatively simple to combine silver
nanowires and graphene in this way on a large scale
using spraying machines and patterned rollers.
Dr Matthew Large, University of Sussex, flexes a screen made from acrylic plastic coated in silver
nanowires and graphene to illustrate the kind of touch screens that can potentially be produced
using the new approach.