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化学学报
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化学学报 ›› 2000, Vol. 58 ›› Issue (4): 397-401. 上一篇    下一篇

研究论文

银－金红石复合纳米微晶的光谱性能

刘云;刘春艳;张志颍   

  1. 中国科学院感光化学研究所.北京(100101)
  • 发布日期:2000-04-15

Spectral properties of silver-rutile composite microcrystals

Liu Yun;Liu Chunyan;Zhang Zhiying   

  1. Inst Photog Chem, Acad Sinica.Beijing(100101)
  • Published:2000-04-15

PDF

486

被引次数

5

λ>330nm光照射含有金红石型TiO2微晶颗粒的AgNO3溶液，制备出了Ag-TiO2复合超微粒子，与纯的银溶胶相比，复合粒子上银的等离子体吸收峰宽化红移，位于400～600nm。这种复合超微粒子的溶胶，表现出表面增强拉曼散射(SERS)效应。吸附-共振增强可用来解释Ag-TiO2复合粒子的SERS效应。

关键词: 银, 金红石, 纳米相材料, 表面增强拉曼散射, 二氧化钛

Composite ultrafine a\particles of silver microcrystals supported on a microcrystalline TiO2(rutile) particle are synthesized by irradiating rutile colloid containing AgNO3 soluton with light of wavelength λ>330 nm. The surface plasa absorption of Ag microcrystals supported on the microcrystalline TiO2 particle shows broadened absorption at 400～600 nm. The silver microcystals loaded on the surface of microcrystalline rutile is confirmed by TEM. A strong surace-enhanced Raman scattering (SERS) effect of the rutile microcrystal particles on which silver microcrys- tals are deposited is observed. The SERS could be attributed to “adsorption- resonance enhancement”.

Key words: SILVER, RUTILE, NANOPHASE MATERIALS, SURFACE ENHANCED RAMAN SCATTERING, TITANIUM DIOXIDE

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