Surfactant Ligand Removal and Rational Fabrication of Inorganically Connected Quantum Dots

Handle URI:
http://hdl.handle.net/10754/599820
Title:
Surfactant Ligand Removal and Rational Fabrication of Inorganically Connected Quantum Dots
Authors:
Zhang, Haitao; Hu, Bo; Sun, Liangfeng; Hovden, Robert; Wise, Frank W.; Muller, David A.; Robinson, Richard D.
Abstract:
A novel method is reported to create inorganically connected nanocrystal (NC) assemblies for both II-VI and IV-VI semiconductors by removing surfactant ligands using (NH 4) 2S. This surface modification process differs from ligand exchange methods in that no new surfactant ligands are introduced and the post-treated NC surfaces are nearly bare. The detailed mechanism study shows that the high reactivity between (NH 4) 2S and metal-surfactant ligand complexes enables the complete removal of surfactant ligands in seconds and converts the NC metal-rich shells into metal sulfides. The post-treated NCs are connected through metal-sulfide bonding and form a larger NCs film assembly, while still maintaining quantum confinement. Such "connected but confined" NC assemblies are promising new materials for electronic and optoelectronic devices. © 2011 American Chemical Society.
Citation:
Zhang H, Hu B, Sun L, Hovden R, Wise FW, et al. (2011) Surfactant Ligand Removal and Rational Fabrication of Inorganically Connected Quantum Dots. Nano Lett 11: 5356–5361. Available: http://dx.doi.org/10.1021/nl202892p.
Publisher:
American Chemical Society (ACS)
Journal:
Nano Letters
KAUST Grant Number:
KUS-C1-018-02
Issue Date:
14-Dec-2011
DOI:
10.1021/nl202892p
PubMed ID:
22011091
Type:
Article
ISSN:
1530-6984; 1530-6992
Sponsors:
We acknowledge helpful discussions with Professor Tobias Hanrath. This publication is based on work supported in part by Award No. KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST) and by the Semiconductor Research Corporation and the Center for Nanoscale Systems (NSF #EEC-0117770, 0646547). We also acknowledge support of 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 support of Energy Materials Center at Cornell (EMC<SUP>2</SUP>), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Science under Award Number DE-SC0001086.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorZhang, Haitaoen
dc.contributor.authorHu, Boen
dc.contributor.authorSun, Liangfengen
dc.contributor.authorHovden, Roberten
dc.contributor.authorWise, Frank W.en
dc.contributor.authorMuller, David A.en
dc.contributor.authorRobinson, Richard D.en
dc.date.accessioned2016-02-28T06:10:35Zen
dc.date.available2016-02-28T06:10:35Zen
dc.date.issued2011-12-14en
dc.identifier.citationZhang H, Hu B, Sun L, Hovden R, Wise FW, et al. (2011) Surfactant Ligand Removal and Rational Fabrication of Inorganically Connected Quantum Dots. Nano Lett 11: 5356–5361. Available: http://dx.doi.org/10.1021/nl202892p.en
dc.identifier.issn1530-6984en
dc.identifier.issn1530-6992en
dc.identifier.pmid22011091en
dc.identifier.doi10.1021/nl202892pen
dc.identifier.urihttp://hdl.handle.net/10754/599820en
dc.description.abstractA novel method is reported to create inorganically connected nanocrystal (NC) assemblies for both II-VI and IV-VI semiconductors by removing surfactant ligands using (NH 4) 2S. This surface modification process differs from ligand exchange methods in that no new surfactant ligands are introduced and the post-treated NC surfaces are nearly bare. The detailed mechanism study shows that the high reactivity between (NH 4) 2S and metal-surfactant ligand complexes enables the complete removal of surfactant ligands in seconds and converts the NC metal-rich shells into metal sulfides. The post-treated NCs are connected through metal-sulfide bonding and form a larger NCs film assembly, while still maintaining quantum confinement. Such "connected but confined" NC assemblies are promising new materials for electronic and optoelectronic devices. © 2011 American Chemical Society.en
dc.description.sponsorshipWe acknowledge helpful discussions with Professor Tobias Hanrath. This publication is based on work supported in part by Award No. KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST) and by the Semiconductor Research Corporation and the Center for Nanoscale Systems (NSF #EEC-0117770, 0646547). We also acknowledge support of 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 support of Energy Materials Center at Cornell (EMC<SUP>2</SUP>), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Science under Award Number DE-SC0001086.en
dc.publisherAmerican Chemical Society (ACS)en
dc.subjectconnectionen
dc.subjectligand removalen
dc.subjectmechanismen
dc.subjectNanocrystalsen
dc.subjectphotoluminescence lifetimeen
dc.subjectquantum confinementen
dc.titleSurfactant Ligand Removal and Rational Fabrication of Inorganically Connected Quantum Dotsen
dc.typeArticleen
dc.identifier.journalNano Lettersen
dc.contributor.institutionCornell University, Ithaca, United Statesen
dc.contributor.institutionKavli Institute at Cornell for Nanoscale Science, Ithaca, United Statesen
dc.contributor.institutionBowling Green State University, Bowling Green, 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.