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Gold Nanoparticle Arrays Can Form New Highly Ultra-sensitive Sensors

A group of scientists from the University of Bath and Northwestern University has created a novel type of sensor dais taking a gold nanoparticle array that is 100 times more responsive in comparison to the present analogous sensors. The sensors will have a series of gold disk-structured nanoparticles placed on a glass slide. The Bath team observed that the use of an infra-red laser on the precisely arranged particles tends to bring about an unusual amount of ultra violet (UV) light emission.

The bonding between the molecules and the surface nanoparticles is basically affected using the UV light generation mechanism which means only a small portion of the material is sensed. The researchers anticipate that in the forecast the new technology can help create new ultra-sensitive sensors for medical diagnostics or air pollution applications. According to Dr. Ventsislav Valev, the lead of the research this novel mechanism can help detect tiny molecules making it 100 times more sensitive compared to conventional techniques. The array of gold nanoparticles disks arrangement on the glass slide is very intricate and precise such that any change in the gap between the disks or its thickness changes the signal being detected.

The binding of the molecules to the gold nanoparticle coated surface tends to bring about a change in the electrons present at the gold surface, which causes them to alter the extent of UV light emitted. The amount of emitted UV light generally depends on the molecule type and its bond with the surface. The tiny volumes of molecules can be discovered with the help of this technique that would permit ultra-sensitive detection. The low concentrated biological markers can be found in order to pre-diagnose disease like cancer in the future timeframe. The present study focuses on the new sensing mechanism so as to help test the sensing of enormous types of chemicals. This technique is expected to reach other scientists in the next 5 Years. Washington State University scientists have created a new way to transfer drugs and therapies into cells at the nanoscale level without any toxic effects that have obstructed other such efforts.

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