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22 Current news about the topic silicon dioxide

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Magnetic nanoparticles with ionic liquids for water purification

Providing Safe, Clean Water

03-Dec-2019

In many parts of the world, access to clean drinking water is far from certain. Filtration of large volumes of water, however, is slow and impractical. In the journal Angewandte Chemie, scientists have introduced a new water purification method based on magnetic nanoparticles coated with a ...

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Crystal surprise

High-pressure experiments reveal new forms of a silica

16-Nov-2018

By compressing the rare mineral coesite an international team of scientists has discovered unexpected forms of silica with unusual crystal structures. The findings could have direct implications not only for the understanding of silicate liquids in the deep interior of Earth, but also for ...

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Diamond watch components

19-Jun-2018

SNSF-funded researchers have developed a new technique for carving materials to create micromechanical systems. In particular, they have created a miniscule watch component out of synthetic single-crystal diamond. Diamond is very hard and elastic, a very good thermal conductor and highly ...

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Atomic blasting creates new devices to measure nanoparticles

18-Dec-2017

Like sandblasting at the nanometer scale, focused beams of ions ablate hard materials to form intricate three-dimensional patterns. The beams can create tiny features in the lateral dimensions--length and width, but to create the next generation of nanometer-scale devices, the energetic ions must ...

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Ultrafast snapshots of relaxing electrons in solids

18-Sep-2017

Using ultrafast flashes of laser and x-ray radiation, scientists at the Max Planck Institute of Quantum Optics took snapshots of the briefest electron motion inside a solid material to date. The electron motion lasted only 750 billionths of the billionth of a second before it fainted, setting a ...

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Hafnia dons a new face

17-May-2017

It's a material world, and an extremely versatile one at that, considering its most basic building blocks -- atoms -- can be connected together to form different structures that retain the same composition. Diamond and graphite, for example, are but two of the many polymorphs of carbon, meaning ...

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A perfect team for nanoelectronics

Polymer-coated silicon nanosheets as alternative to graphene

09-Mar-2017

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material ...

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A SOI wafer is a suitable substrate for gallium nitride crystals

06-Mar-2017

In cooperation with Okmetic Oy and the Polish ITME, researchers at Aalto University have studied the application of SOI (Silicon On Insulator) wafers, which are used as a platform for manufacturing different microelectronics components, as a substrate for producing gallium nitride crystals. The ...

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Semiconductor-free microelectronics are now possible, thanks to metamaterials

09-Nov-2016

Engineers at the University of California San Diego have fabricated the first semiconductor-free, optically-controlled microelectronic device. Using metamaterials, engineers were able to build a microscale device that shows a 1,000 percent increase in conductivity when activated by low voltage ...

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Electric current at record speed

Scientists have generated the fastest electric current that has ever been measured inside a solid material

27-Oct-2016

In the field of electronics, the principle 'the smaller, the better' applies. Some building blocks of computers or mobile phones, however, have become nearly as small today as only a few atoms. It is therefore hardly possible to reduce them any further. Another factor for the performance of ...

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