Title :
Charge transfer mechanism from quantum dot to carbon nanotube
Author :
Han, Chang-Soo ; Jeong, Sohee ; Shim, Hyung Cheoul
Author_Institution :
Dept. of Nano-Mechanic, Korea Inst. of Machinery & Mater. (KIMM), Daejeon, South Korea
Abstract :
We successfully assembled individual carbon nanotube (CNT) on the electrode as well as quantum dots (QDs) on the CNT by using dielectrophoretic force twice. For chemical bonding between CNT and QD, pyridine molecules are used. Charges generated from photo excitation of QD transported to the CNT, and then we measured the current change. It was observed that CNT played role of excellent conduit for charge transfer. When we used several sizes of QDs, absorption bandwidth of the optical device was determined by the emission wavelength of QD.
Keywords :
II-VI semiconductors; bonds (chemical); cadmium compounds; carbon nanotubes; charge exchange; electrophoresis; nanofabrication; photoexcitation; photoluminescence; semiconductor growth; semiconductor quantum dots; semiconductor-insulator boundaries; wide band gap semiconductors; C-CdSe; absorption bandwidth; carbon nanotube; charge transfer; chemical bonding; conduit; current change; dielectrophoretic force; emission wavelength; microelectrode; optical device; photoexcitation; photoluminescence; pyridine molecules; quantum dot;
Conference_Titel :
Nanotechnology (IEEE-NANO), 2010 10th IEEE Conference on
Conference_Location :
Seoul
Print_ISBN :
978-1-4244-7033-4
Electronic_ISBN :
1944-9399
DOI :
10.1109/NANO.2010.5697844
