Ultra-stable 4H-gold nanowires up to 800 °c in a vacuum

Wang，Qi; Zhao，Zhi Liang; Cai，Chao; Li，Hui; Gu，Meng

2019

10.1039/c9ta01306g

Journal of Materials Chemistry A   影响因子和分区

2050-7488

2050-7496

Crystal phase engineering allows the growth of important noble metal structures with superior optical, electronic, or catalytic functional properties. However, the thermodynamic phase stabilities of nano-sized materials at high temperature are still largely unknown. Here, we reported atomic-scale structural analysis during heating hexagonal 4H-gold nanowires to high temperatures ∼850 °C using in situ transmission electron microscopy (TEM). The 4H phase can withstand high temperature till 800 °C and maintain a typical ABCB 4H stacking order. Further heating to 850 °C led to melting of the 4H-phase nanowires to form particles. After cooling the as-formed particles to room temperature, atomic-scale scanning TEM characterization revealed an fcc crystal structure of these particles. The 4H-gold nanowires with only 12 nm diameter showed remarkable phase stability up to 800 °C, making various applications possible in electronics, catalytic reactions, and optical fields.

EI ; SCI

英语

第一 ; 通讯

Development and Reform Commission of Shenzhen Municipality[] ; Development and Reform Commission of Shenzhen Municipality[] ; Development and Reform Commission of Shenzhen Municipality[1106] ; National Natural Science Foundation of China[21802065]

Chemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000508175800027

Royal Society of Chemistry

20194407611534

Catalysis ; Gold ; High resolution transmission electron microscopy ; In situ processing ; Nanowires ; Phase stability ; Temperature

Precious Metals:547.1 ; Thermodynamics:641.1 ; Optical Devices and Systems:741.3 ; Nanotechnology:761 ; Physical Chemistry:801.4 ; Chemical Reactions:802.2 ; Solid State Physics:933 ; Crystal Lattice:933.1.1

2-s2.0-85071641940

Scopus

Department of Materials Science and EngineeringSouthern University of Science and Technology,Shenzhen, Guangdong,No. 1088 Xueyuan Blvd,518055,China

Wang，Qi,Zhao，Zhi Liang,Cai，Chao,et al. Ultra-stable 4H-gold nanowires up to 800 °c in a vacuum[J]. Journal of Materials Chemistry A,2019,7(41):23812-23817.

Wang，Qi,Zhao，Zhi Liang,Cai，Chao,Li，Hui,&Gu，Meng.(2019).Ultra-stable 4H-gold nanowires up to 800 °c in a vacuum.Journal of Materials Chemistry A,7(41),23812-23817.

Wang，Qi,et al."Ultra-stable 4H-gold nanowires up to 800 °c in a vacuum".Journal of Materials Chemistry A 7.41(2019):23812-23817.