Lithography of Self-assembled Semiconductor Quantum Dots on Templates Fabricated from Mixed Langmuir-Blodgett Films
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- Watanabe Satoshi
- Department of Materials Science and Technology, Tokyo University of Science
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- Tamura Naoya
- Department of Materials Science and Technology, Tokyo University of Science
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- Matsumoto Mutsuyoshi
- Department of Materials Science and Technology, Tokyo University of Science
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In this paper, we discuss a useful technique to fabricate patterned single layers consisting of quantum dots on two-dimensional templates fabricated from phase-separated mixed Langmuir-Blodgett (LB) films. The phase-separated structures are governed by two competing interactions-line tension and dipole-dipole interaction-and are tunable by adjusting the intermolecular interactions between the film-forming molecules and the fabrication conditions. The templates can be fabricated from mixed LB films containing silane-coupling agents, which form covalent bonds with Si wafers. The CdS- or CdSe/ZnS-nanoparticles were immobilized on the templates using a chemisorption technique. The samples were analyzed using ultraviolet-visible absorption spectroscopy, emission spectroscopy, atomic force microscopy, scanning electron microscopy, and fluorescence microscopy. The diameters of the CdS-NPs and CdSe/ZnS were estimated to be about 2.6 and 4.5 nm, respectively, using the Brus equation. We successfully obtained a patterned single layer consisting of quantum dots on the templates. The density of the immobilized-CdSe/ZnS-NPs on these templates can be controlled through variations in the concentration of the aqueous dispersion of CdSe/ZnS-NPs. Fluorescence observations indicate that the immobilized-CdSe/ZnS-NPs on the templates serve as light-emitting devices. These results indicate that patterned quantum dots can be formed only through self-assembly processes.
収録刊行物
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- Journal of Oleo Science
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Journal of Oleo Science 61 (5), 277-283, 2012
公益社団法人 日本油化学会
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詳細情報 詳細情報について
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- CRID
- 1390001204091543680
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- NII論文ID
- 130004435965
- 40019229978
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- NII書誌ID
- AA11503337
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- COI
- 1:STN:280:DC%2BC38rnslynsw%3D%3D
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- ISSN
- 13473352
- 13458957
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- NDL書誌ID
- 023584431
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- PubMed
- 22531055
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- PubMed
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