| 银－金红石复合纳米微晶的光谱性能 |
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| 引用本文： | 刘云,刘春艳,张志颖. 银－金红石复合纳米微晶的光谱性能[J]. 化学学报, 2000, 58(4): 397-401 |
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| 作者姓名： | 刘云 刘春艳 张志颖 |
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| 作者单位： | 中国科学院感光化学研究所,北京,100101 |
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| 基金项目： | 国家自然科学基金，2957314， |
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| 摘 要： | 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。
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| 关 键 词： | 银 金红石 纳米相材料 表面增强拉曼散射 二氧化钛 |
| 修稿时间： | 1999-05-21 |
Spectral properties of silver-rutile composite microcrystals |
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| LIU Yun,LIU Chun-Yan,ZHANG Zhi-Ying. Spectral properties of silver-rutile composite microcrystals[J]. Acta Chimica Sinica, 2000, 58(4): 397-401 |
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| Authors: | LIU Yun LIU Chun-Yan ZHANG Zhi-Ying |
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| Affiliation: | Inst Photog Chem, Acad Sinica.Beijing(100101) |
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| Abstract: | Composite ultrafine aparticles 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”. |
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| Keywords: | composite particle SERS resonance enhancement |
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