Size dependence in tunneling spectra of PbSe quantum-dot arrays
碩士 === 國立交通大學 === 電子物理系所 === 97 === Interdot Coulomb interactions and collective Coulomb blockade were theoretically argued to be a newly important topic and experimentally identified in semiconductor quantum dots, formed in the gate confined two-dimensional electron gas system. The developments of...
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ndltd-TW-097NCTU54290502015-10-13T15:42:33Z http://ndltd.ncl.edu.tw/handle/56145897540241988260 Size dependence in tunneling spectra of PbSe quantum-dot arrays 硒化鉛量子點陣列的穿隧能譜對尺寸之相關性 Chen, Sung-Fang 鄭淞芳 碩士 國立交通大學 電子物理系所 97 Interdot Coulomb interactions and collective Coulomb blockade were theoretically argued to be a newly important topic and experimentally identified in semiconductor quantum dots, formed in the gate confined two-dimensional electron gas system. The developments of the cluster science and colloidal synthesis accelerated the studies of electron transport in colloidal nanocrystal or quantum-dot solids. To study the interdot coupling, various sizes of two-dimensional arrays of colloidal PbSe quantum dots are self-assembled on flat gold surfaces for scanning tunneling microscopy and scanning tunneling spectroscopy measurements at both room and liquid-nitrogen temperatures. The tip-to-array, array-to-substrate, and interdot capacitances are evaluated and the tunneling spectra of quantum-dot arrays are analyzed by the theory of collective Coulomb blockade. The current-voltage of PbSe quantum-dot arrays conforms properly to a scaling power law function. In this study, a dependence of tunneling spectra on sizes (numbers of quantum dots) of arrays is reported and the capacitive coupling between quantum dots in the arrays is explored. Jian, Wen-Bin 簡紋濱 2009 學位論文 ; thesis 57 zh-TW |
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碩士 === 國立交通大學 === 電子物理系所 === 97 === Interdot Coulomb interactions and collective Coulomb blockade were theoretically argued to be a newly important topic and experimentally identified in semiconductor quantum dots, formed in the gate confined two-dimensional electron gas system. The developments of the cluster science and colloidal synthesis accelerated the studies of electron transport in colloidal nanocrystal or quantum-dot solids. To study the interdot coupling, various sizes of two-dimensional arrays of colloidal PbSe quantum dots are self-assembled on flat gold surfaces for scanning tunneling microscopy and scanning tunneling spectroscopy measurements at both room and liquid-nitrogen temperatures. The tip-to-array, array-to-substrate, and interdot capacitances are evaluated and the tunneling spectra of quantum-dot arrays are analyzed by the theory of collective Coulomb blockade. The current-voltage of PbSe quantum-dot arrays conforms properly to a scaling power law function. In this study, a dependence of tunneling spectra on sizes (numbers of quantum dots) of arrays is reported and the capacitive coupling between quantum dots in the arrays is explored.
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author2 |
Jian, Wen-Bin |
author_facet |
Jian, Wen-Bin Chen, Sung-Fang 鄭淞芳 |
author |
Chen, Sung-Fang 鄭淞芳 |
spellingShingle |
Chen, Sung-Fang 鄭淞芳 Size dependence in tunneling spectra of PbSe quantum-dot arrays |
author_sort |
Chen, Sung-Fang |
title |
Size dependence in tunneling spectra of PbSe quantum-dot arrays |
title_short |
Size dependence in tunneling spectra of PbSe quantum-dot arrays |
title_full |
Size dependence in tunneling spectra of PbSe quantum-dot arrays |
title_fullStr |
Size dependence in tunneling spectra of PbSe quantum-dot arrays |
title_full_unstemmed |
Size dependence in tunneling spectra of PbSe quantum-dot arrays |
title_sort |
size dependence in tunneling spectra of pbse quantum-dot arrays |
publishDate |
2009 |
url |
http://ndltd.ncl.edu.tw/handle/56145897540241988260 |
work_keys_str_mv |
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1717768299743281152 |