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Chauvin, A., Molina-Luna, L., Ding, J., Choi, C.-H., Tessier, P.-Y. & El Mel, A.-A. (2019) Study of the Coarsening of Nanoporous Gold Nanowires by In Situ Scanning Transmission Electron Microscopy During Annealing. Physica Status Solidi-Rapid Research Letters, 1900376. 
Added by: Richard Baschera (2019-09-30 09:09:02)   Last edited by: Richard Baschera (2019-09-30 09:20:46)
Type de référence: Article
DOI: 10.1002/pssr.201900376
Clé BibTeX: Chauvin2019
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Catégories: INTERNATIONAL, PCM
Créateurs: Chauvin, Choi, Ding, El Mel, Molina-Luna, Tessier
Collection: Physica Status Solidi-Rapid Research Letters
Consultations : 1/437
Indice de consultation : 5%
Indice de popularité : 1.25%
Résumé     
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 degrees 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.
  
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