TY - JOUR
T1 - Environment-sensitive thermal coarsening of nanoporous gold
AU - Kuwano-Nakatani, Satoko
AU - Fujita, Takeshi
AU - Uchisawa, Kazuki
AU - Umetsu, Daichi
AU - Kase, Yu
AU - Kowata, Yusuke
AU - Chiba, Katsuhiko
AU - Tokunaga, Tomoharu
AU - Arai, Shigeo
AU - Yamamoto, Yuta
AU - Tanaka, Nobuo
AU - Chen, Mingwei
N1 - Publisher Copyright:
© 2014 The Japan Institute of Metals and Materials.
PY - 2015
Y1 - 2015
N2 - In order to investigate environmental effects on the ligament/pore coarsening of nanoporous gold (NPG), we studied the thermal coarsening of NPG both in air and vacuum by ex situ observation, and found that it has high structural stability against heat treatment in vacuum. To clarify the nature of this phenomenon, we investigated the thermal coarsening of NPG by in situ environmental transmission electron microscopy. At an elevated temperature (400°C), the coarsening of ligaments/pores was triggered by introducing either pure N2 or O2 gas into the transmission electron microscopy (TEM) chamber (but not by Ar gas). We thus conclude with a discussion on the mechanism for thermal coarsening of NPG.
AB - In order to investigate environmental effects on the ligament/pore coarsening of nanoporous gold (NPG), we studied the thermal coarsening of NPG both in air and vacuum by ex situ observation, and found that it has high structural stability against heat treatment in vacuum. To clarify the nature of this phenomenon, we investigated the thermal coarsening of NPG by in situ environmental transmission electron microscopy. At an elevated temperature (400°C), the coarsening of ligaments/pores was triggered by introducing either pure N2 or O2 gas into the transmission electron microscopy (TEM) chamber (but not by Ar gas). We thus conclude with a discussion on the mechanism for thermal coarsening of NPG.
KW - Catalytic materials
KW - Environmental factors
KW - Environmental transmission electron microscopy
KW - Nanoporous gold
KW - Thermal coarsening
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U2 - 10.2320/matertrans.MF201403
DO - 10.2320/matertrans.MF201403
M3 - Article
AN - SCOPUS:84927556697
VL - 56
SP - 468
EP - 472
JO - Materials Transactions
JF - Materials Transactions
SN - 1345-9678
IS - 4
ER -