Surface modification-induced phase transformation of hexagonal close-packed gold square sheets

Handle URI:
http://hdl.handle.net/10754/347306
Title:
Surface modification-induced phase transformation of hexagonal close-packed gold square sheets
Authors:
Fan, Zhanxi; Huang, Xiao; Han, Yu ( 0000-0003-1462-1118 ) ; Bosman, Michel ( 0000-0002-8717-7655 ) ; Wang, Qingxiao; Zhu, Yihan; Liu, Qing; Li, Bing; Zeng, Zhiyuan; Wu, Jumiati; Shi, Wenxiong; Li, Shuzhou; Gan, Chee Lip; Zhang, Hua
Abstract:
Conventionally, the phase transformation of inorganic nanocrystals is realized under extreme conditions (for example, high temperature or high pressure). Here we report the complete phase transformation of Au square sheets (AuSSs) from hexagonal close-packed (hcp) to face-centered cubic (fcc) structures at ambient conditions via surface ligand exchange, resulting in the formation of (100)f-oriented fcc AuSSs. Importantly, the phase transformation can also be realized through the coating of a thin metal film (for example, Ag) on hcp AuSSs. Depending on the surfactants used during the metal coating process, two transformation pathways are observed, leading to the formation of (100)f-oriented fcc Au@Ag core-shell square sheets and (110)h/(101)f-oriented hcp/fcc mixed Au@Ag nanosheets. Furthermore, monochromated electron energy loss spectroscopy reveals the strong surface plasmon resonance absorption of fcc AuSS and Au@Ag square sheet in the infrared region. Our findings may offer a new route for the crystal-phase and shape-controlled synthesis of inorganic nanocrystals. © 2015 Macmillan Publishers Limited. All rights reserved.
KAUST Department:
Advanced Membranes and Porous Materials Research Center; Physical Sciences and Engineering (PSE) Division; Advanced Nanofabrication, Imaging and Characterization Core Lab
Citation:
Surface modification-induced phase transformation of hexagonal close-packed gold square sheets 2015, 6:6571 Nature Communications
Publisher:
Springer Nature
Journal:
Nature Communications
Issue Date:
13-Mar-2015
DOI:
10.1038/ncomms7571
Type:
Article
ISSN:
2041-1723
Additional Links:
http://www.nature.com/doifinder/10.1038/ncomms7571
Appears in Collections:
Articles; Advanced Membranes and Porous Materials Research Center; Advanced Nanofabrication, Imaging and Characterization Core Lab; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorFan, Zhanxien
dc.contributor.authorHuang, Xiaoen
dc.contributor.authorHan, Yuen
dc.contributor.authorBosman, Michelen
dc.contributor.authorWang, Qingxiaoen
dc.contributor.authorZhu, Yihanen
dc.contributor.authorLiu, Qingen
dc.contributor.authorLi, Bingen
dc.contributor.authorZeng, Zhiyuanen
dc.contributor.authorWu, Jumiatien
dc.contributor.authorShi, Wenxiongen
dc.contributor.authorLi, Shuzhouen
dc.contributor.authorGan, Chee Lipen
dc.contributor.authorZhang, Huaen
dc.date.accessioned2015-03-30T13:54:20Zen
dc.date.available2015-03-30T13:54:20Zen
dc.date.issued2015-03-13en
dc.identifier.citationSurface modification-induced phase transformation of hexagonal close-packed gold square sheets 2015, 6:6571 Nature Communicationsen
dc.identifier.issn2041-1723en
dc.identifier.doi10.1038/ncomms7571en
dc.identifier.urihttp://hdl.handle.net/10754/347306en
dc.description.abstractConventionally, the phase transformation of inorganic nanocrystals is realized under extreme conditions (for example, high temperature or high pressure). Here we report the complete phase transformation of Au square sheets (AuSSs) from hexagonal close-packed (hcp) to face-centered cubic (fcc) structures at ambient conditions via surface ligand exchange, resulting in the formation of (100)f-oriented fcc AuSSs. Importantly, the phase transformation can also be realized through the coating of a thin metal film (for example, Ag) on hcp AuSSs. Depending on the surfactants used during the metal coating process, two transformation pathways are observed, leading to the formation of (100)f-oriented fcc Au@Ag core-shell square sheets and (110)h/(101)f-oriented hcp/fcc mixed Au@Ag nanosheets. Furthermore, monochromated electron energy loss spectroscopy reveals the strong surface plasmon resonance absorption of fcc AuSS and Au@Ag square sheet in the infrared region. Our findings may offer a new route for the crystal-phase and shape-controlled synthesis of inorganic nanocrystals. © 2015 Macmillan Publishers Limited. All rights reserved.en
dc.publisherSpringer Natureen
dc.relation.urlhttp://www.nature.com/doifinder/10.1038/ncomms7571en
dc.rightsArchived with thanks to Nature Communicationsen
dc.titleSurface modification-induced phase transformation of hexagonal close-packed gold square sheetsen
dc.typeArticleen
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Centeren
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentAdvanced Nanofabrication, Imaging and Characterization Core Laben
dc.identifier.journalNature Communicationsen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionSchool of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singaporeen
dc.contributor.institutionInstitute of Materials Research and Engineering (IMRE), A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602, Singaporeen
dc.contributor.institutionNanyang Technological University, Temasek Laboratories@NTU, 9th Storey, BorderX Block, Research Techno Plaza 50 Nanyang Drive, Singapore 637553, Singaporeen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorHan, Yuen
kaust.authorWang, Qingxiaoen
kaust.authorZhu, Yihanen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.