期刊
ACS NANO
卷 4, 期 1, 页码 324-330出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn9009938
关键词
OD-1D hybrid; CdSe nanocrystal quantum dot; single-walled carbon nanotube; noncovalent adsorption; carrier transfer; photoluminescence; photocurrent
类别
资金
- Ministry of Education, Science and Technology [2009-0083219]
- Center for Nanoscale Mechantronics and Manufacturing
- Ministry of Knowledge Economy (MKE)
- Korea Institute for Advancement in Technology (KIAT)
- Brain Korea 21 Project
Nanocrystal quantum dot (NOD)/single-walled carbon nanotube (SWNT) hybrid nanomaterials were synthesized, assembled into field effect transistors (FETs) via dielectrophoresis (DEP), and characterized optically and electronically. The pyridine moiety functioned as a short, noncovalent linker between the NODS and SWNTs and allowed more efficient carrier transfer through the assemblies without deleteriously altering electronic structures. Photoluminescence studies of the resulting assemblies support an efficient carrier transfer process in CdSe-py-SWNTs unlike that of CdSe/ZnS-py-SWNTs. The use of DEP as a means of controlling the assembly process allowed the creation of a SWNT array containing densely packed CdSe NQDs across a 2 mu m gap between electrodes. Observations and characterization of the photocurrent, resistivity, gate dependence, and optical properties of these systems suggest efficient electron transfer from photoexcited NQDs to SWNTs.
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