Surfactant Ligand Removal and Rational Fabrication of Inorganically Connected Quantum Dots

Haitao Zhang; Bo Hu; Liangfeng Sun; Robert Hovden; Frank W. Wise; David A. Muller; Richard D. Robinson

doi:10.1021/nl202892p

Surfactant Ligand Removal and Rational Fabrication of Inorganically Connected Quantum Dots

Haitao Zhang, Bo Hu, Liangfeng Sun, Robert Hovden, Frank W. Wise, David A. Muller, Richard D. Robinson

Research output: Contribution to journal › Article › peer-review

201 Scopus citations

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.

Original language	English (US)
Pages (from-to)	5356-5361
Number of pages	6
Journal	Nano Letters
Volume	11
Issue number	12
DOIs	https://doi.org/10.1021/nl202892p
State	Published - Dec 14 2011
Externally published	Yes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUS-C1-018-02
Acknowledgements: 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 (EMC2), 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.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

Access to Document

10.1021/nl202892p

Cite this

@article{fb24bd9ea421474e9373ae92f4e2ca37,

title = "Surfactant Ligand Removal and Rational Fabrication of Inorganically Connected Quantum Dots",

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. {\textcopyright} 2011 American Chemical Society.",

author = "Haitao Zhang and Bo Hu and Liangfeng Sun and Robert Hovden and Wise, {Frank W.} and Muller, {David A.} and Robinson, {Richard D.}",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): KUS-C1-018-02 Acknowledgements: 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 (EMC2), 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. This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

year = "2011",

month = dec,

day = "14",

doi = "10.1021/nl202892p",

language = "English (US)",

volume = "11",

pages = "5356--5361",

journal = "Nano Letters",

issn = "1530-6984",

publisher = "American Chemical Society",

number = "12",

}

TY - JOUR

T1 - Surfactant Ligand Removal and Rational Fabrication of Inorganically Connected Quantum Dots

AU - Zhang, Haitao

AU - Hu, Bo

AU - Sun, Liangfeng

AU - Hovden, Robert

AU - Wise, Frank W.

AU - Muller, David A.

AU - Robinson, Richard D.

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): KUS-C1-018-02 Acknowledgements: 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 (EMC2), 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. This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2011/12/14

Y1 - 2011/12/14

N2 - 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.

AB - 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.

UR - http://hdl.handle.net/10754/599820

UR - https://pubs.acs.org/doi/10.1021/nl202892p

UR - http://www.scopus.com/inward/record.url?scp=83655172557&partnerID=8YFLogxK

U2 - 10.1021/nl202892p

DO - 10.1021/nl202892p

M3 - Article

C2 - 22011091

SN - 1530-6984

VL - 11

SP - 5356

EP - 5361

JO - Nano Letters

JF - Nano Letters

IS - 12

ER -

Surfactant Ligand Removal and Rational Fabrication of Inorganically Connected Quantum Dots

Abstract

Bibliographical note

Access to Document

Other files and links

Fingerprint

Cite this