Patent ID: 7599066
Filing Date: 2009-10-06
Classification: B82Y,G01N

Abstract:
1. A sensing method for detecting a change in an optical constant in an ambient solvent of a nanostructure comprising metal and being capable of localized plasmon resonance, said method comprising: detecting the change in the optical constant by detecting a change in each of a pair of plasmon resonance peaks in a response spectrum with respect to light incident on said nanostructure, wherein one of said pair of plasmon resonance peaks is shifted to a longer wavelength side by the change in the optical constant in the ambient solvent and the other of said pair of plasmon resonance peaks is shifted to a shorter wavelength side by the change in the optical constant in the ambient solvent, wherein at least one of said pair of plasmon resonance peaks is shifted to the shorter wavelength side when a dielectric constant of the ambient solvent is increased and is shifted to the longer wavelength side when the dielectric constant of the ambient solvent is decreased.