Sentences with phrase «of nanowires»

In the notice, Chang Ming Li from the Institute for Clean Energy & Advanced Materials (ICEAM) at Southwest University in China, states that there is «insufficient evidence to conclusively» identify the composition of the nanowire array described in the article, which «severely undermines the validity of the reported conclusions.»

Their laser's target was an array of nanowires made out of a material called deuterated polyethylene.

The X-ray images of each nanowire show the distribution of the scattering intensity and the mechanical strain in the core of gallium - nitride and the shell of indium - gallium - nitride.

The chip, which comprises ultrathin networks of nanowires in the shape of «hashtags», has all the qualities to allow Majorana particles to exchange places.

Moreover, there is no simple way to grow different types of nanowires in the same environment and on the same substrate.

«We found out that the growth of the nanowires is not only due to the VLS mechanism but that a second component also contributes, which we were able to observe and quantify for the first time in this experiment.

This change is of relevance to applications, as the structure and shape of the nanowires considerably affect the properties of the resulting material.

«Although this process is already quite well established, it has not been possible until now to specifically control the crystal structure of the nanowires produced by it.

So, my group developed the synthesis of the nanowires used in the study.

Cross-sectional SEM image of the nanowire / bacteria hybrid array used in a revolutionary new artificial photosynthesis system.

He says this bundle of nanowire resonates like a guitar string, firing thousands of times faster than normal activity in a neuron.

Since these nanowires are prepared using standard semiconductor processing techniques, we can prepare, within, say, an hour or so, 6 - inch wafers full of nanowires with varying densities, varying lengths and varying diameters.

Generating videos of the nanowires stretching out required new methods to simultaneously label multiple features, keep a camera focused on the wriggling bacteria, and combine the optical techniques with atomic force microscopy to gain higher resolution.

Preliminary research results that began as lemons — a contaminant - caused failure that impeded the expected formation of nanowires — eventually turned into lemonade when scanning electron microscope images revealed long, straight channels.

The researchers also showed that depending on the growth direction chosen, different optical properties were observed thanks to the crystal surfaces exposed at the surface of the nanowire.

As a graduate student, Alex developed arrays of nanowires as cellular - scale syringes and electrochemical probes (Shalek et al, PNAS, 2010; Robinson et al, Nature Nanotech, 2012) and used them to study how biochemical perturbations alter cellular responses en masse (Chevrier et al, Cell, 2011; Shalek et al, Nano Letters, 2012; Yosef et al, Nature, 2013).

DOS close to the free surface is found to differ from the one at the center of the nanowire, revealing more populated modes at lower frequencies.

Direct atomic - scale visualization of nanowires of zinc oxide was achieved through their unique pancake - type diffraction by using four - dimensional (4D) ultrafast electron crystallography.

Georgia Tech scientists made piezoelectric generators out of nanowires and attached them to tiny hamster jackets.

The silicon particles are made up of a series of nanowires connected by thin bridges, which allows for high flexibility and porosity.

This creates just enough collisions to allow electrons to exchange from one to the next until they reach the end of the nanowire and transfer to the rock or metal surface.

Through light microscopy imaging, the team had an idea of the nanowires» basic composition.

Independently of VLS growth, the vapour deposited material also attaches itself directly to the side walls, particularly in the lower region of the nanowire.

By reducing the density of nanowires, the expansions reach even larger values and occur at shorter times, suggesting a decrease of the structural constraint in transient atomic motions.

We have examined a number of nanowires using X-ray microscopy and even though the nanowires should in principle be identical, we can see that they are different and have very different structure,» explains Robert Feidenhans «l, professor and head of the Niels Bohr Institute at the University of Copenhagen.

At the University of California, Berkeley, electrical engineer Ali Javey and his team attached a grid of nanowire transistors to a polyimide film placed atop a layer of rubber.

«We measured 20 nanowires and when we saw the images, we were very surprised because you could clearly see the details of each nanowire.

The process clears out nearly 100 percent of nanowires, nanosheets, nanotubes and other one - and two - dimensional nanomaterials.

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.

The ability to direct the positioning of nanowires is likely to add steam to the already fast moving field of molecular electronics, says Bao.

«Nano - hashtags» could provide definite proof of Majorana particles: Network of nanowires gives particles the space to exchange places.»

Copper's rippled surface could add to the electrical resistance of nanowires made from the metal.

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.

Scientists designed a mesh of nanowires made of potassium manganese oxide.

Researchers at IBM Almaden Research Center in San Jose, Calif., meanwhile, are placing their bets on racetrack memory, which stores data in a magnetic pattern on thousands of nanowires — each 1,000 times thinner than a human hair — arranged on a silicon chip.

Further microscopy of the nanowire showed that the structure of the tin oxide atoms had changed from an ordered crystalline arrangement to an amorphous glass - like form.

This inhomogeneous stress field results in a nonsymmetrical mechanical response of the nanowires under tensile and compressive loadings.

«The complex nature of the stresses formed in nanowires, as a result of superposition of the stress fields from surface relaxation and reconstruction as well as the stacking fault stress fields, changes the failure mechanism of the nanowires.»

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.

Srinivasan's team designed two - and three - dimensional (2D and 3D) models of nanowires with a square, hexagonal or octagonal core surrounded by various shell configurations.

At the initial deposition stage — the lowest size range — the shells consisted of perfect cylinders in the 2D model, and they formed ultrasmall rings, or «nanorings», stacked along the vertical direction of the nanowire, in the 3D model.

And by staining the bacterial membrane, periplasm, cytoplasm, and specific proteins, researchers were able to take video of the nanowires reaching out — confirming that they were based on membrane, and not pili at all.

By altering the concentrations in the alloy, the researchers could precisely manipulate, even on the same substrate in the same batch, the orientation of the nanowires.

In addition to using a different metal, the researchers are also using a vertical alignment of nanowire structures.

One of the nanowires central to the NBI - scientist's research.

Frank Ogletree, Molecular Foundry staff scientist, assisted in mapping the optical properties of the nanowires.

Surprisingly, this phenomenon does not depend on the diameter of the nanowire as long as d < 500nm.

The thermal conductances of the nanowire systems are compared to bulk values for silicon and expected values for nanowires.

These wires are created by partly embedding a silicon nanowire in a polymer and subsequent etching of the exposed part of the nanowire.

Researchers at the SHINES center showed that they could control phonons by confining them in a field of nanowires.