Surface enhance Raman scattering in aligned metal/semiconductor nanocrystals

对齐金属/半导体纳米晶体中的表面增强拉曼散射

基本信息

  • 批准号:
    18540319
  • 负责人:
  • 金额:
    $ 2.51万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
  • 财政年份:
    2006
  • 资助国家:
    日本
  • 起止时间:
    2006 至 2007
  • 项目状态:
    已结题

项目摘要

We studied electronic interaction between semiconductor nanocrystals and metal nanocrystals by measuring Raman scattering and photoluminescence spectra. First, we discussed Raman scattering spectral shape of semiconductor nanocrystals. The Raman scattering spectral shape was calculated by a phonon confinement model considering the relaxation of the momentum conservation rule. The semiconductor nanocrystals we used had a possibility to farm zincblende or wurtzite crystal structure. The calculated Raman scattering spectra assuming wurtzite structure were more preferable to explain the experimental spectra. This result was consistent with the crystal structure obtained from TEM images. Our finding indicates that we can determine the nanocrystal structure from the Raman scattering analyses without using e. g. TEM.Next, we fabricated close-packed semiconductor/metal mixed nanoparticle monolayers and measured the Raman scattering and photoluminescence spectra simultaneously, in order to inve … More stigate the influence of the Raman scattering and photoluminescence properties of semiconductor nanoparticles on the surface plasmons of metal nanoparticles. The TEM images showed that close-packed semiconductor/metal nanoparticle monolayers were successfully fabricated. With an increase of the metal nanoparticle ratio, the PL intensity decreased dramatically, while the Raman scattering intensity increased slightly. The time-resolved photoluminescence spectra showed that the photo-excited exciton energy in semiconductor nanocrystals transferred to metal nanoparticles. The observed semiconductor-nanoparticle number density dependences of the Raman scattering and photoluminescence intensities were able to be explained by an energy transfer model which considered the effects of electromagnetic enhancement and energy transfer. We demonstrated that conducting simultaneous measurements of Raman scattering and photoluminescence spectra is a useful technique to understand the interaction between metal and semiconductor nanostructures. Less
通过测量拉曼散射和光致发光光谱,研究了半导体纳米晶与金属纳米晶之间的电子相互作用。首先,我们讨论了半导体纳米晶体的拉曼散射光谱形状。利用声子约束模型,考虑动量守恒定律的松弛,计算了拉曼散射谱的形状。我们使用的半导体纳米晶体有可能形成锌钛矿或纤锌矿晶体结构。纤锌矿结构的拉曼散射谱更能解释实验光谱。该结果与从TEM图像获得的晶体结构一致。我们的发现表明,我们可以确定的拉曼散射分析,而不使用电子的结构。G.然后,我们制备了半导体/金属混合纳米粒子的密排单层膜,并同时测量了其拉曼散射和光致发光光谱,以研究半导体/金属混合纳米粒子的光致发光特性。 ...更多信息 研究了半导体纳米颗粒的拉曼散射和光致发光特性对金属纳米颗粒表面等离子体的影响。TEM图像表明,紧密堆积的半导体/金属纳米粒子单层成功地制造。随着金属纳米颗粒比例的增加,荧光强度急剧下降,而拉曼散射强度略有增加。时间分辨光致发光谱表明,半导体纳米晶中的光激子能量转移到了金属纳米颗粒中。所观察到的纳米粒子的数量密度依赖的拉曼散射和光致发光强度能够被解释的能量转移模型,该模型考虑了电磁增强和能量转移的影响。我们证明,进行同时测量的拉曼散射和光致发光光谱是一个有用的技术,以了解金属和半导体纳米结构之间的相互作用。少

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Photoluminescence and Raman scattering spectra o CdSe/Au-nanoparticle monolayer films
CdSe/Au 纳米颗粒单层薄膜的光致发光和拉曼散射光谱
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    M. Kawai;N. Matsuura;A. Yamamoto;H. Yanagi;K. Hosoki;S Yamamoto;Y. Kanemitsu
  • 通讯作者:
    Y. Kanemitsu
Simultaneous measurements of photoluminescence and Raman scattering spectra in mixed metal and semiconductor nanoparticle monolayers
同时测量混合金属和半导体纳米颗粒单层中的光致发光和拉曼散射光谱
  • DOI:
  • 发表时间:
    2008
  • 期刊:
  • 影响因子:
    0
  • 作者:
    M. Kawai;N. Matsuura;H. Yanagi;A. Yamamoto;Y. Kanemitsu
  • 通讯作者:
    Y. Kanemitsu
Simultaneous measurements of photoluminescence and Ramar scattering spectra in metal/semiconductor-nanoparticle-composite monolayer films
同时测量金属/半导体纳米颗粒复合单层薄膜的光致发光和拉马尔散射光谱
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    M. Kawai;N. Matsuura;A. Yamamoto;H. Yanagi;K. Hosoki;S Yamamoto;Y. Kanemitsu
  • 通讯作者:
    Y. Kanemitsu
Photoluminescence and Raman scattering of metal/semiconductor nanoparticle monolayer films
金属/半导体纳米粒子单层薄膜的光致发光和拉曼散射
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    M. Kawai;N. Matsuura;A. Yamamoto;H. Yanagi;K. Hosoki;S Yamamoto;Y. Kanemitsu
  • 通讯作者:
    Y. Kanemitsu
金属/半導体ナノ粒子単層膜の作製と光学特性
金属/半导体纳米颗粒单层薄膜的制备及光学性能
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    A. Yamamoto;H. Endo;N. Matsuura;A. Ishizumi;Y. Kanemitsu;A. Yamamoto;細木弘真
  • 通讯作者:
    細木弘真
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YAMAMOTO Aishi其他文献

YAMAMOTO Aishi的其他文献

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{{ truncateString('YAMAMOTO Aishi', 18)}}的其他基金

Studies of the interaction between semiconductor nanocrystals and metal localized surface plasmons by photoluminescence and Raman scattering measurements
通过光致发光和拉曼散射测量研究半导体纳米晶体和金属局域表面等离子体激元之间的相互作用
  • 批准号:
    22540330
  • 财政年份:
    2010
  • 资助金额:
    $ 2.51万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)

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