Search results for raman dye

Optics & Photonics Apr 10, 2018

Iridescent photonic cellulose, mimicking the structural color of insects, with optical applications

The bright colors of some butterflies, beetles or birds are not due to the presence of pigments that selectively absorb light, but due to the so-called structural coloration. Structural coloration occurs on surfaces with ...

Nanophysics Jan 2, 2018

Silver nanoparticles take spectroscopy to new dimension

As medicine and pharmacology investigate nanoscale processes, it has become increasingly important to identify and characterize different molecules. Raman spectroscopy, a technique that leverages the scattering of laser light ...

Materials Science Jul 25, 2017

Scientists equip chemical sensors with 'traps' to detect toxic substances

Scientists from Tomsk Polytechnic University and the University of Chemistry and Technology (Prague, Czech Republic) have created novel chemical sensors for Raman spectrometers, devices that measure the quantitative and qualitative ...

Engineering Jun 1, 2017

Single cells lined up like ducks in a row

The higher the concentration of tumor cells in the bloodstream, the greater the risk of metastasis. The number of circulating tumor cells indicates how well a patient is responding to therapy. Fraunhofer researchers have ...

Optics & Photonics Apr 27, 2017

'Volumetric' imaging method reveals chemical content

A "chemical imaging" system that uses a special type of laser beam to penetrate deep into tissue might lead to technologies that eliminate the need to draw blood for analyses including drug testing and early detection of ...

Condensed Matter Mar 24, 2017

Surprising twist in confined liquid crystals: A simple route to developing new sensors

Researchers at Georgia Institute of Technology have found a material used for decades to color food items ranging from corn chips to ice creams could potentially have uses far beyond food dyes.

Nanophysics Feb 13, 2017

Luminescence switchable carbon nanodots follow intracellular trafficking and drug delivery

Tiny carbon dots have, for the first time, been applied to intracellular imaging and tracking of drug delivery involving various optical and vibrational spectroscopic-based techniques such as fluorescence, Raman, and hyperspectral ...

Optics & Photonics Dec 1, 2016

New ultra-high density optical storage technology

According to current estimates, dozens of zettabytes of information will be stored electronically by 2020, which will rely on physical principles that facilitate the use of single atoms or molecules as basic memory cells. ...

Bio & Medicine Oct 3, 2016

New system can detect cocaine at low concentrations

Researchers from Valencia and the Basque Country have developed a new method to detect cocaine and mycoplasma at very low concentrations. It has been designed as an alternative for use in laboratories and is potentially more ...

Nanomaterials Jul 22, 2016

Ultrasensitive sensor using N-doped graphene

A highly sensitive chemical sensor based on Raman spectroscopy and using nitrogen-doped graphene as a substrate was developed by an international team of researchers working at Penn State. In this case, doping refers to introducing ...

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