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Effect of using polyimide capillaries during thermal experiments on the particle size distribution of supported Pt nanoparticles
Author(s) -
GámezMendoza Liliana,
Resto Oscar,
MartínezIñesta María
Publication year - 2015
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s1600576715015083
Subject(s) - polyimide , materials science , thermogravimetric analysis , kapton , thermal stability , transmission electron microscopy , nanoparticle , outgassing , composite material , particle (ecology) , transmittance , analytical chemistry (journal) , chemical engineering , nanotechnology , layer (electronics) , chemistry , optoelectronics , chromatography , oceanography , organic chemistry , geology , engineering
Kapton HN‐type polyimide capillaries are commonly used as sample holders for transmission X‐ray experiments at temperatures below 673 K because of their thermal stability, high X‐ray transmittance and low cost. Using high‐angle annular dark field scanning high‐resolution transmission electron microscopy and thermogravimetric analysis, this work shows that using polyimide capillaries leads to the overgrowth of supported Pt nanoparticles during reduction at temperatures below the glass transition temperature ( T g = 658 K) owing to an outgassing of water from the polyimide. Quartz capillaries were also studied and this overgrowth was not observed.