Surface plasmon resonance from self-assembled Ag nanoparticles and its enhanced CdSe emission
Surface plasmon resonance from self-assembled Ag nanoparticles and its enhanced CdSe emission
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自组装银纳米颗粒的表面等离子体共振及其增强的 CdSe 发射
作者：
采用柠檬酸钠还原AgNO3的方法制备了Ag胶体溶液，利用静电沉积技术自组装了单分散Ag纳米粒子薄膜，研究了Ag纳米粒子的光学性质。通过改变反应物浓度和退火温度，控制Ag纳米粒子的尺寸和表面等离子体共振吸收特性。Ag纳米粒子介导了CdSe量子点的发光。通过将Ag纳米颗粒薄膜与CdSe量子点偶联，观察到CdSe量子点的光致发光（PL）强度显著增强，这是由于金属纳米颗粒的表面等离子体共振增强效应。
Ag colloids solution was synthesized by reduction of AgNO3 from sodium citrate.Monodisperse Ag nanoparticles films were self-assembled by electrostatic deposition technique.We investigated the optical properties of Ag nanoparticles.The size of Ag nanoparticles and its surface plasmon resonance absorption properties were controlled by changing the concentration of the reactants and the following annealing temperature.Ag nanoparticles mediated emission of CdSe quantum dots(QDs) was also studied.By coupling Ag nanoparticles film to CdSe QDs,a significant enhancement in photoluminescence(PL) intensity of CdSe QDs was observed,which was due to the enhancement effect of surface plasmon resonance from metal nanoparticles.