Abstract
It is well-known that gold nanoparticles (GNPs) exhibit an extinction peak due to localized surface plasmon resonance (SPR) in the visible region, which is applicable as optical sensors, surface-enhanced Raman scattering (SERS) and nonlinear optical (NLO) devices. In this paper, we shall demonstrate immobilization of GNPs in PDMS and reversible control in SPR wavelength of GNPs by changing their interparticle distance, which is dependent on the swelling effect of polydimethylsiloxane (PDMS).