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27 Current news about the topic fluorescent dyes

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Smart Fluorescent Dyes

Modulating photo- and electroluminescence in a stimuli-responsive molecular dye

17-Aug-2018

Controlling the excited electronic states in luminescent systems remains a challenge in the development of fluorescent and phosphorescent dyes. Now, scientists in Japan have developed a unique organic fluorophore that changes its emission color without loss of efficiency when externally ...

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Fluorescence dyes from the pressure cooker

01-Feb-2017

The laboratory of Dr. Miriam M. Unterlass at the Institute of Materials Chemistry at TU Wien has just reported the synthesis of more than 20 different perylene bisimide dyes. This is not impressive per se. The way they prepare these compounds is though: Conventionally, perylene bisimides are ...

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Shining a light on damage within polymers

19-Aug-2016

When it comes to even the most advanced materials, the adage "if it does not bend, it breaks" is often true. But before that final snap, most materials experience microscopic damage that could be fixed -- but only if you know it's there. In a study researchers introduce a new technique that ...

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Ultrasensitive sensor using N-doped graphene

26-Jul-2016

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 nitrogen atoms into the carbon structure of graphene. This ...

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New fluorescent nanomaterials whose inspiration was taken from plant antenna systems

28-Jan-2016

These new multifunctional materials aim to imitate the photosynthetic organisms of plants. These microorganisms consist of thousands of chlorophyll molecules embedded in a protein matrix, which provides them with a specific orientation/arrangement and intermolecular distance. One of the main ...

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World's first fluorescent sensor to detect date rape drug

01-Apr-2014

A team of researchers from the National University of Singapore (NUS) has developed the world's first fluorescent sensor to identify the presence of a drug known as GHB that is commonly used to spike beverages. When the sensor is mixed with a sample of a beverage containing GHB, the mixture ...

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Anti-counterfeit 'fingerprints' made from silver nanowires

24-Mar-2014

Unique patterns made from tiny, randomly scattered silver nanowires have been created by a group of researchers from South Korea in an attempt to authenticate goods and tackle the growing problem of counterfeiting. The nanoscale 'fingerprints' are made by randomly dumping 20 to 30 individual ...

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Light-controlled data storage using ‘colloidal pixels’

05-Dec-2013

Scientists in Germany have designed a grid of light responsive colloidal particles that could be used to create barcodes for cryptographic data storage. Using a photochromic and fluorescent dyes, the researchers devised a light-triggered ‘dye switch’ to store data. Photochromic dyes are used in ...

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Chemistry breakthrough sheds new light on illness and health

14-May-2013

From microscopes to MRI scanners, imaging technology is growing ever more vital in the world's hospitals, whether for the diagnosis of illness or for research into new cures. Imaging technology requires dyes or contrast agents of some sort. Current contrast agents and dyes are expensive, ...

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Fewer animal experiments thanks to nanosensors

12-Jan-2012

Countless mice, rats and rabbits die every year in the name of science – and the situation is getting worse. While German laboratories used some 2.41 million animals for scientific research in 2005, by 2009 this number had grown to 2.79 million. One third were destined for fundamental biology ...

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