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Oxygen-Controlled Photoconductivity in ZnO Nanowires Functionalized with Colloidal CdSe Quantum Dots
- Source :
- The Journal of Physical Chemistry C. 116:19604-19610
- Publication Year :
- 2012
- Publisher :
- American Chemical Society (ACS), 2012.
-
Abstract
- ZnO nanowire arrays were functionalized with colloidal CdSe quantum dots stabilized by 3-mercaptopropionic acid to form hybrid devices. The photoconductivity of the nanowire/quantum-dot devices was studied under selective photoexcitation of the quantum dots, and it was found that the dynamics strongly depend on the gas environment. Desorption of surface oxygen from both the ZnO nanowires and the CdSe quantum dots, activated by electron tunnelling between the nanowires and the quantum dots, is found to be the dominating process that determines the dynamics of the photoconductivity in the hybrid nanowire/quantum-dot devices.
- Subjects :
- Materials science
Condensed Matter::Other
business.industry
Photoconductivity
Nanowire
Physics::Optics
Nanotechnology
Electron
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Photoexcitation
Condensed Matter::Materials Science
Colloid
General Energy
Quantum dot
Desorption
Optoelectronics
Physical and Theoretical Chemistry
business
Quantum tunnelling
Subjects
Details
- ISSN :
- 19327455 and 19327447
- Volume :
- 116
- Database :
- OpenAIRE
- Journal :
- The Journal of Physical Chemistry C
- Accession number :
- edsair.doi...........efc3ee3934bf63d34386ef123a5c2fd5