Structural Disorder in Colloidal InAs and CdSe Nanocrystals Observed by X-Ray Absorption Near-Edge Spectroscopy
作者： K. S. Hamad , R. Roth , J. Rockenberger , T. van Buuren , A. P. Alivisatos
DOI: 10.1103/PHYSREVLETT.83.3474
关键词:
摘要: We report the observation of size dependent structural disorder by x-ray absorption near-edge spectroscopy (XANES) in InAs and CdSe nanocrystals 17--80 \AA{} diameter. XANES In Cd ${M}_{4,5}$ edges yields features that are sharp for bulk solid but broaden considerably as particle decreases. FEFF7 multiple-scattering simulations reproduce broadening spectra if a bulklike surface reconstruction spherical nanocrystal model is included. This illustrates sensitive to structure entire including surface.
harvard.edu
osti.gov
sci-hub.se 参考文章(34)
Horst Weller, SELF-ORGANIZED SUPERLATTICES OF NANOPARTICLES Angewandte Chemie. ,vol. 35, pp. 1079- 1081 ,(1996) , 10.1002/ANIE.199610791
Stephen A Empedocles, Moungi G Bawendi, Quantum-Confined Stark Effect in Single CdSe Nanocrystallite Quantum Dots Science. ,vol. 278, pp. 2114- 2117 ,(1997) , 10.1126/SCIENCE.278.5346.2114
T. G. Schaaff, M. N. Shafigullin, J. T. Khoury, I. Vezmar, R. L. Whetten, W. G. Cullen, P. N. First, C. Gutiérrez-Wing, J. Ascensio, M. J. Jose-Yacamán, Isolation of Smaller Nanocrystal Au Molecules: Robust Quantum Effects in Optical Spectra Journal of Physical Chemistry B. ,vol. 101, pp. 7885- 7891 ,(1997) , 10.1021/JP971438X
James R. Heath, Covalency in semiconductor quantum dots Chemical Society Reviews. ,vol. 27, pp. 65- 71 ,(1998) , 10.1039/A827065Z
Xiaogang Peng, J. Wickham, A. P. Alivisatos, Kinetics of II-VI and III-V Colloidal Semiconductor Nanocrystal Growth: “Focusing” of Size Distributions Journal of the American Chemical Society. ,vol. 120, pp. 5343- 5344 ,(1998) , 10.1021/JA9805425
JM McHale, A Auroux, AJ Perrotta, A Navrotsky, Surface Energies and Thermodynamic Phase Stability in Nanocrystalline Aluminas Science. ,vol. 277, pp. 788- 791 ,(1997) , 10.1126/SCIENCE.277.5327.788
Sarah H. Tolbert, A. P. Alivisatos, The wurtzite to rock salt structural transformation in CdSe nanocrystals under high pressure Journal of Chemical Physics. ,vol. 102, pp. 4642- 4656 ,(1995) , 10.1063/1.469512
Nicola A. Hill, K. Birgitta Whaley, A theoretical study of the influence of the surface on the electronic structure of CdSe nanoclusters Journal of Chemical Physics. ,vol. 100, pp. 2831- 2837 ,(1994) , 10.1063/1.466477
Charles B. Duke, Semiconductor Surface Reconstruction: The Structural Chemistry of Two-Dimensional Surface Compounds. Chemical Reviews. ,vol. 96, pp. 1237- 1260 ,(1996) , 10.1021/CR950212S
D. Bimberg, M. Grundmann, N.N. Ledentsov, Growth, Spectroscopy, and Laser Application of Self-Ordered III-V Quantum Dots Mrs Bulletin. ,vol. 23, pp. 31- 34 ,(1998) , 10.1557/S0883769400031249