Experimental Observation of Quantum Confinement in the Conduction Band of CdSe Quantum Dots

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Recent theoretical descriptions as to the magnitude of effect that quantum confinement has on he conduction band (CB) of CdSe quantum dots (QD) have been conflicting. In this manuscript, we experimentally identify quantum confinement effects in the CB of CdSe QDs for the first time. Using X-ray absorption spectroscopy, we have unambiguously witnessed the CB minimum shift to higher energy with decreasing particle size and have been able to compare these results to recent theories. Our experiments have been able to identify which theories correctly describe the CB states in CdSe QDs. In particular, our experiments suggest that multiple theories ... continued below

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7 p. (0.3 MB)

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Lee, J I; Meulenberg, R W; Hanif, K M; Mattoussi, H; Klepeis, J E; Terminello, L J et al. December 15, 2006.

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Recent theoretical descriptions as to the magnitude of effect that quantum confinement has on he conduction band (CB) of CdSe quantum dots (QD) have been conflicting. In this manuscript, we experimentally identify quantum confinement effects in the CB of CdSe QDs for the first time. Using X-ray absorption spectroscopy, we have unambiguously witnessed the CB minimum shift to higher energy with decreasing particle size and have been able to compare these results to recent theories. Our experiments have been able to identify which theories correctly describe the CB states in CdSe QDs. In particular, our experiments suggest that multiple theories describe the shifts in the CB of CdSe QDs and are not mutually exclusive.

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7 p. (0.3 MB)

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PDF-file: 7 pages; size: 0.3 Mbytes

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  • Journal Name: Physical Review Letters, vol. 98, N/A, April 13, 2007, pp. 146803; Journal Volume: 98

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  • Report No.: UCRL-JRNL-226853
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 907875
  • Archival Resource Key: ark:/67531/metadc890640

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Office of Scientific & Technical Information Technical Reports

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  • December 15, 2006

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  • Sept. 22, 2016, 2:13 a.m.

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  • April 17, 2017, 12:58 p.m.

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Lee, J I; Meulenberg, R W; Hanif, K M; Mattoussi, H; Klepeis, J E; Terminello, L J et al. Experimental Observation of Quantum Confinement in the Conduction Band of CdSe Quantum Dots, article, December 15, 2006; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc890640/: accessed November 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.