19 Current news of Empa

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The stacked colour sensor

True colours meet minimization

17-Nov-2017

Red-sensitive, blue-sensitive and green-sensitive colour sensors stacked on top of each other instead of being lined up in a mosaic pattern - this principle could allow image sensors with unprecedented resolution and sensitivity to light to be created. However, up to now, the reality hasn't quite ...

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Single crystal measures radioactivity

Affordable detectors for gamma radiation

21-Sep-2016

A research team at Empa and ETH Zurich has developed single crystals made of lead halide perovskites, which are able to gage radioactive radiation with high precision. Initial experiments have shown that these crystals, which can be manufactured from aqueous solutions or low-priced solvents, work ...

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Synthesis of structurally pure carbon nanotubes using molecular seeds

08-Aug-2014

For the first time, researchers at Empa and the Max Planck Institute for Solid State Research have succeeded in "growing" single-wall carbon nanotubes (CNT) with a single predefined structure - and hence with identical electronic properties. And here is how they pulled it off: the CNTs "assembled ...

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Sketchy emission reports revealed by Empa measurements at Jungfraujoch

Fudging in greenhouse gas stats?

31-Aug-2011

Fluorinated hydrocarbons are potent greenhouse gases, emission of which must be reduced under the Kyoto Protocol. If you rely on the official reports of the participating countries, the output of trifluoromethane (HFC-23) in Western Europe is indeed significantly decreasing. However, pollutant ...

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Nanostructures stabilise lasers

Empa researchers use electron beams for chemical reactions

14-Apr-2011

Electron microscopes use focussed electron beams to make extremely small objects visible. By combining the instrument with a gas-injection system material samples can be manipulated and surface structures measuring only nanometres across can be “written”. Empa researchers, together with ...

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Empa researchers clarify reaction pathway to fabricate graphene-like materials

11-Nov-2010

Graphene is a promising material for tomorrow’s nanoelectronics devices. Precise and upscaleable methods to fabricate graphene and derived materials with desired electronic properties are however still searched after. To overcome the current limitations, Empa researchers have fabricated ...

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Nanoribbons for graphene transistors

Materials for tomorrow's nanoelectronics

23-Jul-2010

In the recent issue of Nature, scientists from Empa and the Max Planck Institute for Polymer Research report how they have managed for the first time to grow graphene ribbons that are just a few nanometres wide using a simple surface-based chemical method. Graphene ribbons are considered to be ...

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Nanowires for the electronics and optoelectronics of the future

Process for manufacturing nanoelectronic 'mini-circuits' developed

25-Jun-2010

Organic semiconductors are very promising candidates as starting materials for the manufacture of cheap, large area and flexible electronic components such as transistors, diodes and sensors on a scale ranging from micro to nano. A condition for success in achieving this goal is the ability to ...

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Empa scientists synthesize graphene-like material

Polymer with honeycomb structure

25-Nov-2009

Graphene consists of a two-dimensional carbon layer in which the carbon atoms are arranged on a hexagonal lattice, resembling a honeycomb. Carbon nanotubes are rolled-up sheets of graphene, and thick piles of graphene sheets form graphite. Graphene boasts some very special characteristics - it is ...

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