Ag Nano Particle Composite Film Preparation and Surface Absorption Characteristics

ZHAO Ya-li; LI Ke-xun; MA Fu-hua; SUN Ji-wei; GU Jian-yu; WEI Xue-hong

doi:10.3788/fgxb20153602.0231

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Ag Nano Particle Composite Film Preparation and Surface Absorption Characteristics

更新时间：2020-08-12

- Ag Nano Particle Composite Film Preparation and Surface Absorption Characteristics
- Chinese Journal of Luminescence Vol. 36, Issue 2, Pages: 231-236(2015)
- 作者机构：
  
  1. 山西大学化学化工学院,山西太原,030006
  2. 中国电子科技集团公司第三十三研究所电磁防护技术山西省重点实验室,山西太原,030006
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20153602.0231
  CLC： TG156.2;O614.122
- Received：13 November 2014，
  
  Revised：04 December 2014，
  
  Published：03 February 2015
- 稿件说明：
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赵亚丽, 李克训, 马富花等. 纳米Ag颗粒复合薄膜的制备及其吸收特性[J]. 发光学报, 2015,36(2): 231-236

ZHAO Ya-li, LI Ke-xun, MA Fu-hua etc. Ag Nano Particle Composite Film Preparation and Surface Absorption Characteristics[J]. Chinese Journal of Luminescence, 2015,36(2): 231-236
赵亚丽, 李克训, 马富花等. 纳米Ag颗粒复合薄膜的制备及其吸收特性[J]. 发光学报, 2015,36(2): 231-236 DOI： 10.3788/fgxb20153602.0231.

ZHAO Ya-li, LI Ke-xun, MA Fu-hua etc. Ag Nano Particle Composite Film Preparation and Surface Absorption Characteristics[J]. Chinese Journal of Luminescence, 2015,36(2): 231-236 DOI： 10.3788/fgxb20153602.0231.

摘要

利用磁控溅射分层制备Ag和SiO

薄膜

通过快速热处理

使Ag颗粒富集在复合薄膜的表面.研究了Ag膜层厚度、退火时间、退火温度和退火方式对Ag颗粒形貌的影响

以及Ag颗粒致密度对其共振吸收的影响.结果表明:通过控制每层Ag膜的厚度

可有效控制Ag颗粒形貌.当每层金属为2 nm、退火温度为500 ℃时

形成的颗粒粒径大小均匀且致密度较高.通过间断退火可有效降低Ag颗粒的粒径.发现Ag颗粒表面等离子共振吸收并没有随颗粒粒径的减小而明显降低

甚至提高.这和以往的报道不同.通过深入研究金属颗粒表面等离子体产生机理

发现其表面等离子共振吸收增强的原因是致密度较高的颗粒表面能级与费米能级差值较大

Ag颗粒内部的电子向颗粒表面迁移越多

形成新的费米能级

的电子数就越多

表面等离子共振吸收就越强.最终得出了金属颗粒共振吸收不单纯依赖于金属粒径、和颗粒的致密度也有很大关系的结论.

Abstract

Ag and SiO

films were prepared by RF magnetron sputtering layer by layer. Ag nanoparticles diffused towards and mostly assembled near the surfaces of composite films

via

ripid thermal treatment. The effects of the thickness of each Ag film

the thermal treatment time

temperature and process on the Ag particle morphology were investigated. The relationship of Ag particles density with the resonance absorption was researched

too. It is found that different Ag particle shapes can be obtained by changing the thickness of each Ag film. The smaller Ag particles can be obtained by intermittent thermal treatment. The Ag particle density and particle uniformity can be improved by annealing at 500 ℃. The result in this paper is different from previous reports. Namely

the surface plasmon resonance absorption of Ag particles does not significantly decrease with the decreasing of particle size

even improves. It is found that the higher the density of the Ag particles is

the larger of the difference between the particle surface energy level and Fermi level is. With the migrating of the electrons from the particle interior to the surface

the electron number to form new Fermi level

increases

so the surface plasmon resonance absorption becomes stronger. Finally

we draw a conclusion that the metal particle resonance absorption not only relies on the metal particle size

but also greatly relies on the particle density.

关键词

Keywords

references

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