Development of nano-structured super-lattice hybrid material for highly qualified optical modulation device

为了研究表面等离子体效应对光谱的光学修饰作用，制备了以Au为核、氧化铁为壳的杂化纳米粒子，并制备了纳米粒子自组装膜。我们成功地合成了直径为6 nm的Au核纳米粒子，壳层厚度为1.8~2.9nm。由于表面等离子体共振，我们可以观察到混合纳米颗粒膜在580 nm处的光谱的最大吸收，其与混合纳米颗粒分散溶液的光谱的最大吸收没有变化，但显示出比Au纳米颗粒分散溶液的最大吸收红移。从这个结果，表面等离子体共振是非常敏感的介电常数的相邻材料的Au表面。

Synthesis of Au core/iron-oxide shell hybrid nanoparticles and fabrication of their self-assembled nanoparticle film have been developed to investigate optical modification of spectra through surface plasmon effect. We successfully synthesized Au core nanoparticle with 6nm in diameter covered by iron-oxide shell with 1.8~2.9nm in thickness. And we could observed the maximum absorption of the spectrum for the hybrid nanoparticle film at 580nm due to surface plasmon resonance, which was unchanged with that of the hybrid nanoparticle dispersion solution although showed a red-shift from that of Au nanoparticle dispersion solution. From this result, the surface plasmon resonance is very sensitive to dielectric constant of adjacent material to Au surface.