Now, gold nanoparticles for permanent hair dye
- Spot-fixing: Chandila was in touch with four sets of bookies, says Delhi Police
- Chinese Premier Li Keqiang arrives, to hold talks with PM on boundary, water issues
- IPL 2013: Delhi Daredevils crash to defeat, finish last
- Jaganmohan's wife attacks CBI, accuses it of working at Congress behest
- Blast accused death: UP govt seeks CBI probe, FIR against 42 persons
A permanent solution! Scientists, for the first time, have synthesised gold nanoparticles for dyeing white hair to near permanent brown shades.
The process involves soaking white hair in a solution of a gold compound, turning them pale yellow and then darkening them to a deep brown.
Using an electron microscope, French scientists confirmed that the particles were forming inside the central core cortex of the hair. The colour remained even after repeated washings.
Scientists reported the discovery had applications ranging from hair dyeing to electronic sensors to development of materials with improved properties.
Philippe Walter, director of a lab at the Centre National de la Recherche Scientifique (CNRS) and colleagues explain that gold nanoparticles ¿ 40,000-60,000 of which could fit across the width of a human hair ¿ are a hot topic.
Scientists are exploring other uses, ranging from electronics and sensors to medical diagnostic tests and cancer treatments, the American Chemical Society (ACS) reported.
Gold nanoparticles have been deposited on hair for use as electrodes, and also used to dye wool.
Walter's team looked at a new use ¿ dyeing hair, inspired by the ancient Greeks' and Romans' use of another metal, lead, to colour their hair.
The study was published in American Chemical Society ACS' journal Nano Letters.
- Quake-hit and shaken, Bhaderwah spends nights in the open
- UP blast accused dies on way to jail, govt wanted to drop case against him
- Former civil aviation secy changes mind, seeks airport security exemption as EC
- BCCI suspects Gujarat players in other teams were also approached
- Police on money trail, Sreesanth in fresh trouble
- Chhattisgarh 'encounter' leaves 8 villagers dead, no Maoist link yet