earticle

영어

Outstanding optical property of noble metal nanostructures, localized surface plasmon resonance (LSPR), is a powerful phenomenon used in many chemical and biological. This report described two types of goldcapped nanostructures: nanoparticle and porous anodic alumina (PAA) which reveal the strong excitation of LSPR spectra in the UV-visible region. The silica nanoparticles layer formed by chemical reaction [1] and PAA-fabricated by two-step anodizing process [2] could be used as the bases in gold-capped nanoparticle and PAA structures. After gold deposition on the surface, nanostructures of nanoparticle and PAA are
obviously expressed the optical absorbance of LSPR spectra. Interestingly, depending on the nanostructures, gold-capped nanoparticle structure provides a single peak for its absorbance at 540 nm, however, the gold-capped PAA structure enables to observed many fringes in a wide
range of wavelengths due to the coupling of LSPR and interferometry. We demonstrated that all two types of nanostructures have high potential to develop the extra-sensitive protein sensors with the molecular interface functionalizations. [This work was supported in part by the IT Leading R&D Support Project from the Ministry of Knowledge Economy through KEIT].