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

Kai-Yang Niu; Miao Liu; Kristin A. Persson; Yu Han; Haimei Zheng

doi:10.1021/acsnano.6b02331

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

Kai-Yang Niu, Miao Liu, Kristin A. Persson, Yu Han, Haimei Zheng

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

25 Scopus citations

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.

Original language	English (US)
Pages (from-to)	6235-6240
Number of pages	6
Journal	ACS Nano
Volume	10
Issue number	6
DOIs	https://doi.org/10.1021/acsnano.6b02331
State	Published - May 26 2016

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: 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.

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title = "Strain-Mediated Interfacial Dynamics during Au–PbS Core–Shell Nanostructure Formation",

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. {\textcopyright} 2016 American Chemical Society.",

author = "Kai-Yang Niu and Miao Liu and Persson, {Kristin A.} and Yu Han and Haimei Zheng",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: 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.",

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AU - Liu, Miao

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AU - Han, Yu

AU - Zheng, Haimei

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: 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.

PY - 2016/5/26

Y1 - 2016/5/26

N2 - 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.

AB - 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.

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

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