Strain-Mediated Interfacial Dynamics during Au–PbS Core–Shell Nanostructure Formation

Handle URI:
http://hdl.handle.net/10754/621667
Title:
Strain-Mediated Interfacial Dynamics during Au–PbS Core–Shell Nanostructure Formation
Authors:
Niu, Kai-Yang; Liu, Miao; Persson, Kristin A.; Han, Yu ( 0000-0003-1462-1118 ) ; Zheng, Haimei
Abstract:
An understanding of the hierarchical nanostructure formation is of significant importance for the design of advanced functional materials. Here, we report the in situ study of lead sulfide (PbS) growth on gold (Au) nanorod seeds using liquid cell transmission electron microscopy (TEM). By tracking the formation dynamics of Au-PbS core-shell nanoparticles, we found the preferential heterogeneous nucleation of PbS on the ends of a Au nanorod prior to the development of a complete PdS shell. During PbS shell growth, drastic sulfidation of Au nanorod was observed, leading to large volume shrinkage (up to 50%) of the initial Au nanorod seed. We also captured intriguing wavy interfacial behavior, which can be explained by our DFT calculation results that the local strain gradient at the core-shell interface facilitates the mass transport and mediates reversible phase transitions of Au ↔ Au2S during the PbS shell growth. © 2016 American Chemical Society.
KAUST Department:
Advanced Membranes and Porous Materials Research Center; Physical Sciences and Engineering (PSE) Division
Citation:
Niu K-Y, Liu M, Persson KA, Han Y, Zheng H (2016) Strain-Mediated Interfacial Dynamics during Au–PbS Core–Shell Nanostructure Formation. ACS Nano 10: 6235–6240. Available: http://dx.doi.org/10.1021/acsnano.6b02331.
Publisher:
American Chemical Society (ACS)
Journal:
ACS Nano
Issue Date:
23-May-2016
DOI:
10.1021/acsnano.6b02331
Type:
Article
ISSN:
1936-0851; 1936-086X
Sponsors:
We acknowledge the facility support of National Center for Electron Microscopy (NCEM) at the Molecular Foundry of Lawrence Berkeley National Laboratory, which is funded by the U.S. Department of Energy Basic Energy Sciences under the Contract No. DE-AC02-05CH11231. H.Z. thanks the support of DOE Office of Science Early Career Research Program. The computational work was supported by the Department of Energy's Basic Energy Sciences program - the Materials Project - under Grant No. EDCBEE. We also thank Dr. Karen Bustillo in NCEM for her help on the TEM analyzes.
Appears in Collections:
Articles; Advanced Membranes and Porous Materials Research Center; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorNiu, Kai-Yangen
dc.contributor.authorLiu, Miaoen
dc.contributor.authorPersson, Kristin A.en
dc.contributor.authorHan, Yuen
dc.contributor.authorZheng, Haimeien
dc.date.accessioned2016-11-03T13:22:17Z-
dc.date.available2016-11-03T13:22:17Z-
dc.date.issued2016-05-23en
dc.identifier.citationNiu K-Y, Liu M, Persson KA, Han Y, Zheng H (2016) Strain-Mediated Interfacial Dynamics during Au–PbS Core–Shell Nanostructure Formation. ACS Nano 10: 6235–6240. Available: http://dx.doi.org/10.1021/acsnano.6b02331.en
dc.identifier.issn1936-0851en
dc.identifier.issn1936-086Xen
dc.identifier.doi10.1021/acsnano.6b02331en
dc.identifier.urihttp://hdl.handle.net/10754/621667-
dc.description.abstractAn understanding of the hierarchical nanostructure formation is of significant importance for the design of advanced functional materials. Here, we report the in situ study of lead sulfide (PbS) growth on gold (Au) nanorod seeds using liquid cell transmission electron microscopy (TEM). By tracking the formation dynamics of Au-PbS core-shell nanoparticles, we found the preferential heterogeneous nucleation of PbS on the ends of a Au nanorod prior to the development of a complete PdS shell. During PbS shell growth, drastic sulfidation of Au nanorod was observed, leading to large volume shrinkage (up to 50%) of the initial Au nanorod seed. We also captured intriguing wavy interfacial behavior, which can be explained by our DFT calculation results that the local strain gradient at the core-shell interface facilitates the mass transport and mediates reversible phase transitions of Au ↔ Au2S during the PbS shell growth. © 2016 American Chemical Society.en
dc.description.sponsorshipWe acknowledge the facility support of National Center for Electron Microscopy (NCEM) at the Molecular Foundry of Lawrence Berkeley National Laboratory, which is funded by the U.S. Department of Energy Basic Energy Sciences under the Contract No. DE-AC02-05CH11231. H.Z. thanks the support of DOE Office of Science Early Career Research Program. The computational work was supported by the Department of Energy's Basic Energy Sciences program - the Materials Project - under Grant No. EDCBEE. We also thank Dr. Karen Bustillo in NCEM for her help on the TEM analyzes.en
dc.publisherAmerican Chemical Society (ACS)en
dc.subjectcore-shell nanostructureen
dc.titleStrain-Mediated Interfacial Dynamics during Au–PbS Core–Shell Nanostructure Formationen
dc.typeArticleen
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Centeren
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalACS Nanoen
dc.contributor.institutionDepartment of Materials Science and Engineering, University of California, Berkeley, CA, United Statesen
dc.contributor.institutionEnvironmental Energy Technologies Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United Statesen
dc.contributor.institutionMaterials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United Statesen
kaust.authorHan, Yuen
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