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

本文研究了金核/氧化铁壳杂化纳米粒子的合成及其自组装纳米粒子膜的制备，并利用表面等离子体效应对光谱进行了光学修饰。我们成功地合成了直径为6nm的金核纳米粒子，并覆盖了厚度为1.8~2.9nm的氧化铁壳。由于表面等离子体共振，杂化纳米颗粒膜在580nm处的光谱吸收最大，与杂化纳米颗粒分散溶液的光谱吸收没有变化，但与金纳米颗粒分散溶液的光谱吸收有红移。由此可见，表面等离子体共振对相邻材料的介电常数非常敏感。

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.