TY - JOUR
T1 - Surface thermal fluctuation spectroscopy study of ultra-thin ionic liquid films on quartz
AU - Maruyama, Shingo
AU - Ishikawa, Yuki
AU - Mitsui, Takahisa
AU - Aoki, Kenichiro
AU - Matsumoto, Yuji
N1 - Publisher Copyright:
© 2021 The Japan Society of Applied Physics.
PY - 2021/7
Y1 - 2021/7
N2 - We apply a surface thermal fluctuation spectroscopy technique to investigate the liquid nature of ionic liquid (IL) thin films and micro-droplets. While the spectrum for bulk IL was well explained by a simple Newtonian fluid model, a significant contribution of viscoelasticity was suggested for the vacuum-deposited thin films and micro-droplets. For a sample of IL micro-droplets with statistical distributions of their size and thickness, the scanning surface fluctuation spectroscopy was demonstrated to spatially map out the thickness and viscoelasticity values for effectively investigating the correlation between them, successfully reproducing a typical surface morphology of the sample as well.
AB - We apply a surface thermal fluctuation spectroscopy technique to investigate the liquid nature of ionic liquid (IL) thin films and micro-droplets. While the spectrum for bulk IL was well explained by a simple Newtonian fluid model, a significant contribution of viscoelasticity was suggested for the vacuum-deposited thin films and micro-droplets. For a sample of IL micro-droplets with statistical distributions of their size and thickness, the scanning surface fluctuation spectroscopy was demonstrated to spatially map out the thickness and viscoelasticity values for effectively investigating the correlation between them, successfully reproducing a typical surface morphology of the sample as well.
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U2 - 10.35848/1882-0786/ac08d1
DO - 10.35848/1882-0786/ac08d1
M3 - Article
AN - SCOPUS:85109212855
SN - 1882-0778
VL - 14
JO - Applied Physics Express
JF - Applied Physics Express
IS - 7
M1 - 075503
ER -