4:00 PM - 4:15 PM
[7p-S44-11] Nano-particle positioning for highly sensitive detection of circular dichroism
Keywords:chiral molecules, plasmon, optical pressure
Circular dichroism is known as an optical evaluation method of chiral properties. But, this method is necessary to use the huge amount of chiral molecules. Localized surface plasmon can be engineered to efficiently couple to propagating light and concentrate it into highly localized area, and intense localized fields can enhance the optical signal from the coupled molecules. In particular, an extremely small gap between metal nano-structures exhibits superior light concentration properties. We have demonstrated alignment of a target molecule to a tiny nano-gap with a fluorescent molecule based nano-particle made by the reprecipitation method and optical pressure.
At first, we have fabricated round shape and 40 nm diameter nano-particles with appropriate process condition. A continuous wave laser with a 1064 nm wavelength was used for particle adsorption. We have succeeded to position chiral molecules at the nano-gap region.
At first, we have fabricated round shape and 40 nm diameter nano-particles with appropriate process condition. A continuous wave laser with a 1064 nm wavelength was used for particle adsorption. We have succeeded to position chiral molecules at the nano-gap region.