‘Movies’ of electron motion in solar cell made using femtosecond laser

“Movies” of electrons as they move across a semiconductor junction have been made by researchers at the Okinawa Institute of Science and Technology in Japan using a new imaging technique. Combining photoemission electron microscopy with femtosecond laser pump-probe methods, the technique tracks the motion of electrons on timescales shorter than 1 ps. The researchers say it […]

Gold nanogap electrodes trap tiny particles

Researchers at the University of Minnesota in Minneapolis have invented a new ultralow power technique to trap nanoparticles in the sub-10 nm gaps between two gold electrodes. The technique, which overcomes many of the problems encountered in traditional dielectrophoresis experiments, could help make portable biosensors….. http://nanotechweb.org/cws/article/tech/66547 Making nanogap electrodes

Vacancy defects toughen up 2D materials

Researchers at the University of Oxford in the UK and the Massachusetts Institute of Technology in the US are the first to combine experimental and theoretical approaches at the atomic level to study how monolayer molybdenum sulphide (a typical 2D material) fractures. Thanks to transmission electron microscopy observations, backed up with large-scale molecular dynamics simulations, […]

Polyphenol helps superstructure nano-objects

By functionalizing the surface of a variety of nano-objects (such as nanowires, nanosheets, nanocubes and even biological cells) with polyphenols, researchers at the University of Melbourne in Australia say that they can turn them into superstructured assemblies. The technique, which literally transforms the nanobject into a LEGO brick-like structure with stubs, could be used to […]

Silicon makes good qubit material

Ordinary silicon, the material that has dominated the semiconductor industry for decades, could also make a very promising host material for quantum bits in a future quantum computer. So say researchers at the Delft University of Technology in the Netherlands and the University of Wisconsin at Madison in the US, who have found that electrically […]

Negative refraction of electrons spotted in graphene

The negative refraction of electrons in graphene has been seen for the first time in experiments done by physicists in the US. The work represents an important advance in the fabrication of graphene electronic devices, and could lead to new applications of graphene such as low-power transistors……… http://nanotechweb.org/cws/article/tech/66506 Wrong way: electrons undergoing negative refraction at […]

Graphene coating improves electron microscopy images

Researchers in Korea and the UK have discovered that a graphene coating on biological samples helps dissipate the charge build-up that normally occurs on the surface of these samples during non-destructive electron microscopy imaging. Such a charge build-up is usually a big problem in this context and prevents high-resolution images from being obtained…….. http://nanotechweb.org/cws/article/tech/66514 Graphene […]

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