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Title: | An approach for optimizing the shell thickness of core-shell quantum dots using photoinduced charge transfer |
Authors: | Vinayakan, R Shanmugapriya, T Pratheesh V Nair Ramamurthy, P George Thomas, K |
Keywords: | Photoinduced charge transfer dynamics Quantum dots Phenothiazine N-methylphenothiazine Photoluminescence quenching Electron transfer process |
Issue Date: | 19-Jul-2007 |
Publisher: | American Chemical Society, USA |
Citation: | Journal of Physical Chemistry C III(28):10146-10149; 19 Jul 2007 |
Abstract: | Photoinduced charge-transfer dynamics between CdSe quantum dots (QDs) possessing varying monolayers of ZnS and hole scavengers such as phenothiazine (PT) and N- methylphenothiazine (NMPT) were investigated for optimizing the shell thickness of core - shell quantum dots. Spectroscopic investigations indicate that phenothiazine binds onto the surface of bare CdSe QDs, resulting in the photoluminescence quenching, and two monolayers of ZnS prevent the electron -transfer process. Methodologies presented here can provide quantitative information on the optimum shell thickness of core - shell QDs, which can suppress the undesired electron transfer and provide maximum luminescence yield. |
URI: | http://hdl.handle.net/123456789/31 |
Appears in Collections: | 2007 |
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2007_00106.pdf Restricted Access | 129.52 kB | Adobe PDF | View/Open Request a copy |
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