In Situ Observation of Gold Chloride Decomposition in a Confined Nanospace by Transmission Electron Microscopy

被引：6

作者：

Kobayashi, Keita ^{[1
]}

Kitaura, Ryo ^{[1
]}

Sasaki, Katsuhiro ^{[2
]}

Kuroda, Kotaro ^{[2
]}

Saito, Takeshi ^{[3
]}

Shinohara, Hisanori ^{[1
,4
]}

机构：

[1] Nagoya Univ, Dept Chem, Nagoya, Aichi 4648602, Japan

[2] Nagoya Univ, Dept Quantum Engn, Nagoya, Aichi 4648603, Japan

[3] Natl Inst Adv Ind Sci & Technol, Nanotube Res Ctr, Tsukuba, Ibaraki 3058565, Japan

[4] Nagoya Univ, Inst Adv Res, Nagoya, Aichi 4648601, Japan

来源：

MATERIALS TRANSACTIONS | 2014年 / 55卷 / 03期

基金：

日本科学技术振兴机构;

关键词：

carbon nanotubes; transmission electron microscopy; in situ observation; electron beam irradiation; gold chloride; WALLED CARBON NANOTUBES; LEVEL;

D O I：

10.2320/matertrans.MD201308

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The behavior of gold chloride (AuClx) encapsulated within the inner space of a single-wall carbon nanotube (SWCNT) was investigated under electron beam (e-beam) irradiation and high temperatures. Analysis of the pristine specimen by transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), and Raman spectroscopy show that AuClx is encapsulated within the SWCNTs as a dilute disordered structure. In situ TEM observation of the specimen under e-beam irradiation shows that, within the SWCNTs, AuClx is reduced to a crystalline Au nanowire (AuNW). The AuNW drifts significantly within the SWCNT during the reduction. At high temperatures (>673 K), in situ TEM shows that the AuNW oscillates intermittently at a frequency of similar to 1.1 s(-1) and amplitude of similar to 60 nm. Raman spectroscopy and EDX suggest that these phenomena are caused by an increase in the internal gas pressure in the SWCNTs because the decomposition of AuClx by e-beam irradiation or heat treatment produced chlorine (Cl-2) gas.

引用

页码：461 / 465

页数：5

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