TY - JOUR
T1 - Study of the Coarsening of Nanoporous Gold Nanowires by In Situ Scanning Transmission Electron Microscopy During Annealing
AU - Chauvin, Adrien
AU - Molina-Luna, Leopoldo
AU - Ding, Junjun
AU - Choi, Chang Hwan
AU - Tessier, Pierre Yves
AU - El Mel, Abdel Aziz
N1 - Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/11/1
Y1 - 2019/11/1
N2 - Over the past decades, porous gold has been used in plenty of applications such as catalysis or sensor detection. However, the nanoscale size of both the ligaments and pores makes such material very sensible to temperature. Indeed, the increase in temperature induces coarsening of the structure which can be detrimental for various applications. In this context, understanding of the coarsening on nanoporous gold (NPG) is crucial. In this communication, in situ scanning transmission electron microscopy (STEM) analysis of coarsening is reported by considering the nanosize of the dealloyed sample in dependence on the annealing of NPG nanowire. This study is performed by the in situ STEM of NPG nanowires after annealing between 25 and 600 °C with two different feature ratios (i.e., ligament/pore size) of 0.6 and 1.4. Herein, for the first time, an experimental demonstration is carried out for the two different behaviors of morphology evolution with temperature, corresponding to ligament pinch-off and collapsing of nanoporous materials, which have been highlighted by simulations in the literature.
AB - Over the past decades, porous gold has been used in plenty of applications such as catalysis or sensor detection. However, the nanoscale size of both the ligaments and pores makes such material very sensible to temperature. Indeed, the increase in temperature induces coarsening of the structure which can be detrimental for various applications. In this context, understanding of the coarsening on nanoporous gold (NPG) is crucial. In this communication, in situ scanning transmission electron microscopy (STEM) analysis of coarsening is reported by considering the nanosize of the dealloyed sample in dependence on the annealing of NPG nanowire. This study is performed by the in situ STEM of NPG nanowires after annealing between 25 and 600 °C with two different feature ratios (i.e., ligament/pore size) of 0.6 and 1.4. Herein, for the first time, an experimental demonstration is carried out for the two different behaviors of morphology evolution with temperature, corresponding to ligament pinch-off and collapsing of nanoporous materials, which have been highlighted by simulations in the literature.
KW - annealing
KW - coarsening
KW - collapsing
KW - nanoporous gold
KW - nanowires
KW - pinch-off
UR - http://www.scopus.com/inward/record.url?scp=85071760380&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85071760380&partnerID=8YFLogxK
U2 - 10.1002/pssr.201900376
DO - 10.1002/pssr.201900376
M3 - Article
AN - SCOPUS:85071760380
SN - 1862-6254
VL - 13
JO - Physica Status Solidi - Rapid Research Letters
JF - Physica Status Solidi - Rapid Research Letters
IS - 11
M1 - 1900376
ER -