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Self-folding origami

Chemical "programming" to induce Nafion foil to fold itself

26-Jun-2017

Plastic with a thousand faces: A single piece of Nafion foil makes it possible to produce a broad palette of complex 3D structures. Researchers describe how they use simple chemical "programming" to induce the foil to fold itself using origami and kirigami principles. These folds can be ...

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Short, Ultrashort, Sub-Cycle Short

Making light pulses ever-shorter is one of the goals in ultrafast optics.

04-Jun-2015

Ultrashort light pulses are a valuable achievement. They make it possible to observe chemical reactions, opening up the field of femtochemistry. Other current and/or future applications include high capacity telecommunications systems, photonic switching devices, optical coherence tomography, and ...

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Three wavelengths will do

Practical approach for assessing the melanin and blood content of the skin

24-Apr-2015

Many factors can change skin pigmentation, including aging, exposure to UV light, certain drugs, as well as certain diseases. A simple technique for measuring skin pigmentation could be a helpful tool for research and diagnostics. The same goes for measuring the skin blood content. Alteration of ...

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Musical molecules

Nanofibers align to the sound of Beethoven and Mozart

13-Jan-2014

Humans create and perform music for a variety of purposes such as aesthetic pleasure, healing, religion, and ceremony. Accordingly, a scientific question arises: Can molecules or molecular assemblies interact physically with the sound vibrations of music? In the journal ChemPlusChem, Japanese ...

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Laser diodes versus LEDs

13-Nov-2013

Solid-state lighting (SSL) has recently become competitive with conventional light sources and is now the most efficient source of high color quality white light ever created. At the heart of SSL is the light-emitting diode (LED). The current standard architecture for SSL is the ...

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Growing gallium nitride crystals

06-Nov-2013

Gallium nitride (GaN) is an important material for the semiconductor industry. It features a wide band gap and high thermal conductivity at room temperature, which make it a good material for optoelectronic devices and high-performance radio-frequency microdevices. In the European Journal of ...

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Raman pixel by pixel

15-Aug-2013

Raman spectroscopy provides molecular specificity through spectrally-resolved measurement of the inelastic scattering under monochromatic excitation. In the context of microscopy, it may serve as label-free cell imaging, providing structural information. However, the very low cross-section of ...

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Graphene-like ultrathin sheets of MoO3 are highly efficient photocatalysts

19-Jun-2013

Waste from textile and paint industries often contains organic dyes such as methylene blue as pollutants. Photocatalysis is an efficient means of reducing such pollution, and molybdenum trioxide (MoO3) catalyzes this degradation. Researchers from Bangalore, India, led by C. N. R. Rao now report ...

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Closer to reality

17-Jun-2013

Heterogeneous gas-solid catalyst reactions occur on the atomic scale and there is increasing evidence single atoms and very small clusters can act as primary active sites in chemical reactions. When studying the reactions taking place at the catalyst surface, scientists usually have to look into ...

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When boron butts in

Bridging N–N ligand borylation in group 4 metallocene complexes

16-Apr-2013

For Nature and chemists alike, making atmospheric nitrogen available for the formation of more complex nitrogen compounds is both essential and difficult. Paul Chirik and Scott Semproni at Princeton University, USA, report the first examples of the use of group 4 metallocene complexes for ...

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