Condensed Matter


Peculiar Magnetic Susceptibility

Authors: George Rajna

In a proof-of-concept study published in Nature Physics, researchers drew magnetic squares in a nonmagnetic material with an electrified pen and then "read" this magnetic doodle with X-rays. [21] Researchers have brought electrides into the nanoregime by synthesizing the first 2D electride material. Electrides are ionic compounds, which are made of negative and positive ions. But in electrides, the negative "ions" are simply electrons, with no nucleus. [20] Microelectromechanical systems, or MEMS, are tiny machines fabricated using equipment and processes developed for the production of electronic chips and devices. [19] Researchers from the Harvard John A. Paulson School of Engineering and Applied Sciences have made the world's smallest radio receiver-built out of an assembly of atomic-scale defects in pink diamonds. [18] Smart phones have shiny flat AMOLED displays. Behind each single pixel of these displays hide at least two silicon transistors which were mass-manufactured using laser annealing technologies. [17] Bumpy surfaces with graphene between would help dissipate heat in next-generation microelectronic devices, according to Rice University scientists. [16] Scientists at The University of Manchester and Karlsruhe Institute of Technology have demonstrated a method to chemically modify small regions of graphene with high precision, leading to extreme miniaturisation of chemical and biological sensors. [15] A new method for producing conductive cotton fabrics using graphene-based inks opens up new possibilities for flexible and wearable electronics, without the use of expensive and toxic processing steps. [14] A device made of bilayer graphene, an atomically thin hexagonal arrangement of carbon atoms, provides experimental proof of the ability to control the momentum of electrons and offers a path to electronics that could require less energy and give off less heat than standard silicon-based transistors. It is one step forward in a new field of physics called valleytronics. [13]

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[v1] 2017-03-03 07:23:24

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