Strong, Ductile, and Tough Nanocrystal-Assembled Freestanding Gold Nanosheets

Qing Yu; Jingyang Zhang; Jia Li; Tianyu Wang; Minhyuk Park; Quanfeng He; Zhibo Zhang; Tao Liang; Xue Ding; Yang Yang Li; Qing Wang; Qiaoshi Zeng; Yong Yang

doi:10.1021/acs.nanolett.1c04553

Strong, Ductile, and Tough Nanocrystal-Assembled Freestanding Gold Nanosheets

Qing Yu
, Jingyang Zhang
, Jia Li
, Tianyu Wang
, Minhyuk Park
, Quanfeng He
, Zhibo Zhang
, Tao Liang
, Xue Ding
, Yang Yang Li
, Qing Wang^*
, Qiaoshi Zeng^*
, Yong Yang^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

26 Citations (Scopus)

Abstract

The structural and mechanical properties of low-dimensional nanostructured metals have been attracting tremendous interest in the fast-growing fields of nanosciences and nanotechnologies. However, it still remains a challenge today to develop strong yet ductile low-dimensional metals that can support the further development of nanodevices. Here, through the polymer-assisted assembly of gold nanocrystals, we successfully fabricated the freestanding, ultrathin gold nanomaterial. Unlike conventional bulk gold or other low-dimensional gold nanostructures (i.e., nanowires and nanosheets), these gold nanosheets are composed of highly distorted gold nanocrystals that are 3–5 nm in size, which are joined together through nanosized amorphous carbon interphases. As a result, the gold nanosheets exhibit superb strength (up to 1.2 GPa), excellent ductility (>50%), and superior fracture toughness (>100 J/m²), outperforming various gold nanostructures hitherto reported.

Original language	English
Pages (from-to)	822-829
Journal	Nano Letters
Volume	22
Issue number	2
Online published	14 Jan 2022
DOIs	https://doi.org/10.1021/acs.nanolett.1c04553
Publication status	Published - 26 Jan 2022

Funding

We thank Yanping Yang from HPSTAR for her help with the sample processing using FIB for mechanical and TEM tests. The work of Y.Y. is supported by the Research Grants Council (RGC), the Hong Kong government, through the General Research Fund (GRF) with grant numbers CityU11200719 and CityU11213118. Q.Y. acknowledges funding from the Hong Kong Scholars Program and the China Postdoctoral Science Foundation (2019TQ0279). Q.Z. acknowledges the funding support from the National Natural Science Foundation of China (nos. 51871054 and U1930401).

Research Keywords

freestanding nanosheets
mechanical behavior
nanocrystal-assembled
strong and ductile
ultrathin gold nanosheets

RGC Funding Information

RGC-funded

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10.1021/acs.nanolett.1c04553

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title = "Strong, Ductile, and Tough Nanocrystal-Assembled Freestanding Gold Nanosheets",

abstract = "The structural and mechanical properties of low-dimensional nanostructured metals have been attracting tremendous interest in the fast-growing fields of nanosciences and nanotechnologies. However, it still remains a challenge today to develop strong yet ductile low-dimensional metals that can support the further development of nanodevices. Here, through the polymer-assisted assembly of gold nanocrystals, we successfully fabricated the freestanding, ultrathin gold nanomaterial. Unlike conventional bulk gold or other low-dimensional gold nanostructures (i.e., nanowires and nanosheets), these gold nanosheets are composed of highly distorted gold nanocrystals that are 3–5 nm in size, which are joined together through nanosized amorphous carbon interphases. As a result, the gold nanosheets exhibit superb strength (up to 1.2 GPa), excellent ductility (>50\%), and superior fracture toughness (>100 J/m2), outperforming various gold nanostructures hitherto reported.",

keywords = "freestanding nanosheets, mechanical behavior, nanocrystal-assembled, strong and ductile, ultrathin gold nanosheets",

author = "Qing Yu and Jingyang Zhang and Jia Li and Tianyu Wang and Minhyuk Park and Quanfeng He and Zhibo Zhang and Tao Liang and Xue Ding and Li, \{Yang Yang\} and Qing Wang and Qiaoshi Zeng and Yong Yang",

year = "2022",

month = jan,

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doi = "10.1021/acs.nanolett.1c04553",

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TY - JOUR

T1 - Strong, Ductile, and Tough Nanocrystal-Assembled Freestanding Gold Nanosheets

AU - Yu, Qing

AU - Zhang, Jingyang

AU - Li, Jia

AU - Wang, Tianyu

AU - Park, Minhyuk

AU - He, Quanfeng

AU - Zhang, Zhibo

AU - Liang, Tao

AU - Ding, Xue

AU - Li, Yang Yang

AU - Wang, Qing

AU - Zeng, Qiaoshi

AU - Yang, Yong

PY - 2022/1/26

Y1 - 2022/1/26

N2 - The structural and mechanical properties of low-dimensional nanostructured metals have been attracting tremendous interest in the fast-growing fields of nanosciences and nanotechnologies. However, it still remains a challenge today to develop strong yet ductile low-dimensional metals that can support the further development of nanodevices. Here, through the polymer-assisted assembly of gold nanocrystals, we successfully fabricated the freestanding, ultrathin gold nanomaterial. Unlike conventional bulk gold or other low-dimensional gold nanostructures (i.e., nanowires and nanosheets), these gold nanosheets are composed of highly distorted gold nanocrystals that are 3–5 nm in size, which are joined together through nanosized amorphous carbon interphases. As a result, the gold nanosheets exhibit superb strength (up to 1.2 GPa), excellent ductility (>50%), and superior fracture toughness (>100 J/m2), outperforming various gold nanostructures hitherto reported.

AB - The structural and mechanical properties of low-dimensional nanostructured metals have been attracting tremendous interest in the fast-growing fields of nanosciences and nanotechnologies. However, it still remains a challenge today to develop strong yet ductile low-dimensional metals that can support the further development of nanodevices. Here, through the polymer-assisted assembly of gold nanocrystals, we successfully fabricated the freestanding, ultrathin gold nanomaterial. Unlike conventional bulk gold or other low-dimensional gold nanostructures (i.e., nanowires and nanosheets), these gold nanosheets are composed of highly distorted gold nanocrystals that are 3–5 nm in size, which are joined together through nanosized amorphous carbon interphases. As a result, the gold nanosheets exhibit superb strength (up to 1.2 GPa), excellent ductility (>50%), and superior fracture toughness (>100 J/m2), outperforming various gold nanostructures hitherto reported.

KW - freestanding nanosheets

KW - mechanical behavior

KW - nanocrystal-assembled

KW - strong and ductile

KW - ultrathin gold nanosheets

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U2 - 10.1021/acs.nanolett.1c04553

DO - 10.1021/acs.nanolett.1c04553

M3 - RGC 21 - Publication in refereed journal

C2 - 35029994

SN - 1530-6984

VL - 22

SP - 822

EP - 829

JO - Nano Letters

JF - Nano Letters

IS - 2

ER -

Strong, Ductile, and Tough Nanocrystal-Assembled Freestanding Gold Nanosheets

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GRF: Development of Strong-yet-Ductile Nanograined Alloys with Intergranular Amorphous Films Based on Metallic-Glass Templates

GRF: The Development of Dual-Phase Fe-Based Metallic Glasses and Composites with Optimized Mechanical and Magnetic Properties

Cite this

Strong, Ductile, and Tough Nanocrystal-Assembled Freestanding Gold Nanosheets

Abstract

Funding

Research Keywords

RGC Funding Information

Access Output

Other Access Options

Permanent Link

Other Files and Links

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Projects

GRF: Development of Strong-yet-Ductile Nanograined Alloys with Intergranular Amorphous Films Based on Metallic-Glass Templates

GRF: The Development of Dual-Phase Fe-Based Metallic Glasses and Composites with Optimized Mechanical and Magnetic Properties

Cite this