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Surface Defines the Properties: Colloidal Bi2Se3 Nanosheets with High Electrical Conductivity

Christoph Bauer, Rostyslav Lesyuk, Mahdi Samadi Khoshkhoo, Christian Klinke Orcid Logo, Vladimir Lesnyak, Alexander Eychmüller

The Journal of Physical Chemistry C, Volume: 125, Issue: 11, Pages: 6442 - 6448

Swansea University Author: Christian Klinke Orcid Logo

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DOI (Published version): 10.1021/acs.jpcc.1c00491

Abstract

We investigated the colloidal synthesis of Bi2Se3 nanosheets in ethylene glycol with the goal of increasing their lateral dimensions while keeping their thickness within a few nanometers. The influence of proton-donating sulfuric acid was found to be a triggering factor that promoted the lateral gro...

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Published in: The Journal of Physical Chemistry C
ISSN: 1932-7447 1932-7455
Published: American Chemical Society (ACS) 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa56731
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first_indexed 2021-04-25T10:27:54Z
last_indexed 2021-08-10T03:15:17Z
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spelling 2021-08-09T15:13:56.7222293 v2 56731 2021-04-25 Surface Defines the Properties: Colloidal Bi2Se3 Nanosheets with High Electrical Conductivity c10c44238eabfb203111f88a965f5372 0000-0001-8558-7389 Christian Klinke Christian Klinke true false 2021-04-25 CHEM We investigated the colloidal synthesis of Bi2Se3 nanosheets in ethylene glycol with the goal of increasing their lateral dimensions while keeping their thickness within a few nanometers. The influence of proton-donating sulfuric acid was found to be a triggering factor that promoted the lateral growth of up to 10 μm, whereas the thickness remained in the range 10–12 nm. The lateral size distribution was further optimized by size-selective precipitation enabling individual contacting of the nanosheets by electron-beam lithography. Electrical characterization of individually contacted nanosheets revealed a metal-like temperature dependence of the resistivity and values of the specific conductivity in the range of 470 S/cm at room temperature and 880 S/cm at 5.5 K, which is attributed to the surface-induced off-stoichiometry. The presented colloidal nanosheets can potentially serve as a platform for further studies on topologically nontrivial surface states and arising quantum phenomena in two-dimensional systems. Journal Article The Journal of Physical Chemistry C 125 11 6442 6448 American Chemical Society (ACS) 1932-7447 1932-7455 25 3 2021 2021-03-25 10.1021/acs.jpcc.1c00491 COLLEGE NANME Chemistry COLLEGE CODE CHEM Swansea University 2021-08-09T15:13:56.7222293 2021-04-25T11:27:25.0091326 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemistry Christoph Bauer 1 Rostyslav Lesyuk 2 Mahdi Samadi Khoshkhoo 3 Christian Klinke 0000-0001-8558-7389 4 Vladimir Lesnyak 5 Alexander Eychmüller 6 56731__19925__8fc5a1d592e343ec802ed754456d9947.pdf Manuscript-Bi2Se3-NSs.pdf 2021-05-18T12:54:51.0842266 Output 623379 application/pdf Accepted Manuscript true 2022-03-12T00:00:00.0000000 true eng
title Surface Defines the Properties: Colloidal Bi2Se3 Nanosheets with High Electrical Conductivity
spellingShingle Surface Defines the Properties: Colloidal Bi2Se3 Nanosheets with High Electrical Conductivity
Christian Klinke
title_short Surface Defines the Properties: Colloidal Bi2Se3 Nanosheets with High Electrical Conductivity
title_full Surface Defines the Properties: Colloidal Bi2Se3 Nanosheets with High Electrical Conductivity
title_fullStr Surface Defines the Properties: Colloidal Bi2Se3 Nanosheets with High Electrical Conductivity
title_full_unstemmed Surface Defines the Properties: Colloidal Bi2Se3 Nanosheets with High Electrical Conductivity
title_sort Surface Defines the Properties: Colloidal Bi2Se3 Nanosheets with High Electrical Conductivity
author_id_str_mv c10c44238eabfb203111f88a965f5372
author_id_fullname_str_mv c10c44238eabfb203111f88a965f5372_***_Christian Klinke
author Christian Klinke
author2 Christoph Bauer
Rostyslav Lesyuk
Mahdi Samadi Khoshkhoo
Christian Klinke
Vladimir Lesnyak
Alexander Eychmüller
format Journal article
container_title The Journal of Physical Chemistry C
container_volume 125
container_issue 11
container_start_page 6442
publishDate 2021
institution Swansea University
issn 1932-7447
1932-7455
doi_str_mv 10.1021/acs.jpcc.1c00491
publisher American Chemical Society (ACS)
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Chemistry{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Chemistry
document_store_str 1
active_str 0
description We investigated the colloidal synthesis of Bi2Se3 nanosheets in ethylene glycol with the goal of increasing their lateral dimensions while keeping their thickness within a few nanometers. The influence of proton-donating sulfuric acid was found to be a triggering factor that promoted the lateral growth of up to 10 μm, whereas the thickness remained in the range 10–12 nm. The lateral size distribution was further optimized by size-selective precipitation enabling individual contacting of the nanosheets by electron-beam lithography. Electrical characterization of individually contacted nanosheets revealed a metal-like temperature dependence of the resistivity and values of the specific conductivity in the range of 470 S/cm at room temperature and 880 S/cm at 5.5 K, which is attributed to the surface-induced off-stoichiometry. The presented colloidal nanosheets can potentially serve as a platform for further studies on topologically nontrivial surface states and arising quantum phenomena in two-dimensional systems.
published_date 2021-03-25T04:11:54Z
_version_ 1763753816235180032
score 11.012678

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