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Molecular Linker Enhanced Assembly of CdSe/ZnS Core-Shell Quantum Dots  

Cho, Geun Tae (Department of Chemistry-BK21and Sungkyunkwan Advanced Institute of Nanotechnology, Institute of Basic Sciences, Sungkyunkwan University)
Lee, Jong Hyeon (Department of Chemistry-BK21and Sungkyunkwan Advanced Institute of Nanotechnology, Institute of Basic Sciences, Sungkyunkwan University)
Nam, Hye Jin (Department of Chemistry-BK21and Sungkyunkwan Advanced Institute of Nanotechnology, Institute of Basic Sciences, Sungkyunkwan University)
Jung, Duk Young (Department of Chemistry-BK21and Sungkyunkwan Advanced Institute of Nanotechnology, Institute of Basic Sciences, Sungkyunkwan University)
Publication Information
Korean Chemical Engineering Research / v.46, no.6, 2008 , pp. 1081-1086 More about this Journal
Abstract
QDs-LEDs(quantum dot light emitting device) should contain well-organized arrays of QDs on an electron transport layer. Thin films of CdSe/ZnS core-shell QDs were successfully fabricated on $TiO_2$ substrates by using PDMS stamp and micro contact printing method. 2-Carboxyethylphosphonic acid(CAPO) and 1,6-hexanedithiol(HDT) were employed as molecular linkers in assembling CdSe/ZnS core-shell QDs with high-density and uniform array. The CAPO increased the binding strength between the QDs and the substrates, and the HDT induced the strong inter-particle attractions of assembled QDs. The assembling properties of QDs thin films were characterized by SEM, AFM, optical microscope and photoluminescence spectroscope(PL).
Keywords
Quantum Dot; Molecular Linker; Micro Contact Printing; Surface Modification; Nanoparticle Assembly;
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