Control of Electron Transfer from Lead-Salt Nanocrystals to TiO 2

Handle URI:
http://hdl.handle.net/10754/597855
Title:
Control of Electron Transfer from Lead-Salt Nanocrystals to TiO 2
Authors:
Hyun, Byung-Ryool; Bartnik, A. C.; Sun, Liangfeng; Hanrath, Tobias; Wise, F. W.
Abstract:
The roles of solvent reorganization energy and electronic coupling strength on the transfer of photoexcited electrons from PbS nanocrystals to TiO 2 nanoparticles are investigated. We find that the electron transfer depends only weakly on the solvent, in contrast to the strong dependence in the nanocrystal-molecule system. This is ascribed to the larger size of the acceptor in this system, and is accounted for by Marcus theory. The electronic coupling of the PbS and TiO 2 is varied by changing the length, aliphatic and aromatic structure, and anchor groups of the linker molecules. Shorter linker molecules consistently lead to faster electron transfer. Surprisingly, linker molecules of the same length but distinct chemical structures yield similar electron transfer rates. In contrast, the electron transfer rate can vary dramatically with different anchor groups. © 2011 American Chemical Society.
Citation:
Hyun B-R, Bartnik AC, Sun L, Hanrath T, Wise FW (2011) Control of Electron Transfer from Lead-Salt Nanocrystals to TiO 2 . Nano Lett 11: 2126–2132. Available: http://dx.doi.org/10.1021/nl200718w.
Publisher:
American Chemical Society (ACS)
Journal:
Nano Letters
KAUST Grant Number:
KUS-C1-018-02
Issue Date:
11-May-2011
DOI:
10.1021/nl200718w
PubMed ID:
21506588
Type:
Article
ISSN:
1530-6984; 1530-6992
Sponsors:
The authors thank Professor Masa-aki Haga (Chuo University, Japan) for providing MBPA. This work was supported by the Cornell Center for Materials Research (CCMR) with funding from the Materials Research Science and Engineering Center program of the National Science Foundation (cooperative agreement DMR 0520404) and in part by Award No. KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST).
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorHyun, Byung-Ryoolen
dc.contributor.authorBartnik, A. C.en
dc.contributor.authorSun, Liangfengen
dc.contributor.authorHanrath, Tobiasen
dc.contributor.authorWise, F. W.en
dc.date.accessioned2016-02-25T12:57:51Zen
dc.date.available2016-02-25T12:57:51Zen
dc.date.issued2011-05-11en
dc.identifier.citationHyun B-R, Bartnik AC, Sun L, Hanrath T, Wise FW (2011) Control of Electron Transfer from Lead-Salt Nanocrystals to TiO 2 . Nano Lett 11: 2126–2132. Available: http://dx.doi.org/10.1021/nl200718w.en
dc.identifier.issn1530-6984en
dc.identifier.issn1530-6992en
dc.identifier.pmid21506588en
dc.identifier.doi10.1021/nl200718wen
dc.identifier.urihttp://hdl.handle.net/10754/597855en
dc.description.abstractThe roles of solvent reorganization energy and electronic coupling strength on the transfer of photoexcited electrons from PbS nanocrystals to TiO 2 nanoparticles are investigated. We find that the electron transfer depends only weakly on the solvent, in contrast to the strong dependence in the nanocrystal-molecule system. This is ascribed to the larger size of the acceptor in this system, and is accounted for by Marcus theory. The electronic coupling of the PbS and TiO 2 is varied by changing the length, aliphatic and aromatic structure, and anchor groups of the linker molecules. Shorter linker molecules consistently lead to faster electron transfer. Surprisingly, linker molecules of the same length but distinct chemical structures yield similar electron transfer rates. In contrast, the electron transfer rate can vary dramatically with different anchor groups. © 2011 American Chemical Society.en
dc.description.sponsorshipThe authors thank Professor Masa-aki Haga (Chuo University, Japan) for providing MBPA. This work was supported by the Cornell Center for Materials Research (CCMR) with funding from the Materials Research Science and Engineering Center program of the National Science Foundation (cooperative agreement DMR 0520404) and in part by Award No. KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST).en
dc.publisherAmerican Chemical Society (ACS)en
dc.subjectanchor groupsen
dc.subjectelectron transferen
dc.subjectelectronic couplingen
dc.subjectMarcus theoryen
dc.subjectsolvent reorganization energyen
dc.subjectspacer lengthen
dc.titleControl of Electron Transfer from Lead-Salt Nanocrystals to TiO 2en
dc.typeArticleen
dc.identifier.journalNano Lettersen
dc.contributor.institutionCornell University, Ithaca, United Statesen
kaust.grant.numberKUS-C1-018-02en

Related articles on PubMed

All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.