NMR study of InP quantum dots: Surface structure and size effects

NMR study of InP quantum dots: Surface structure and size effects
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InP 量子点的 NMR 研究:表面结构和尺寸效应

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发表时间:
1999
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通讯作者:
A. Alivisatos
A. Alivisatos
中科院分区:
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文献类型:
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作者:
M. Tomaselli;J. Yarger;M. Bruchez;R. Havlin;David deGraw;A. Pines;A. Alivisatos

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报道了三辛基氧化膦(TOPO)钝化的InP量子点的~(31)P NMR测量结果。光谱显示不同的表面封端的网站,这意味着一个多方面的晶体配体键合配置。两个In 31 P表面组件被解决,并与不同的电子环境。 随着颗粒尺寸的减小,In 31 P芯共振揭示了与InP电子结构的整体尺寸依赖性相关的增加的高场化学位移。 
We report the results of 31P NMR measurements on trioctylphosphine oxide (TOPO) passivated InP quantum dots. The spectra show distinct surface-capping sites, implying a manifold of crystal–ligand bonding configurations. Two In 31P surface components are resolved and related to different electronic surroundings. With decreasing particle size the In 31P core resonance reveals an increasing upfield chemical shift related to the overall size dependence of the InP electronic structure.