TY - JOUR
T1 - Spontaneous deicing on cold surfaces
AU - Song, Dong
AU - Jiang, Youhua
AU - Chou, Tsengming
AU - Asawa, Kaustubh
AU - Choi, Chang Hwan
N1 - Publisher Copyright:
© 2020 American Chemical Society
PY - 2020/9/29
Y1 - 2020/9/29
N2 - Although freezing of a droplet on cold surfaces is a universal phenomenon, its mechanisms are still inadequately understood, especially on the surfaces of which the temperature is lower than −60 °C. Here, we report the unique spontaneous deicing phenomena of a water droplet impacting on cold surfaces with a temperature as low as −120 °C. As a hydrophilic surface is cooled below a critically low temperature (e.g., −57 °C for a silicon surface with a native oxide), the impacting water droplet spontaneously delaminates from the substrate and freezes radially outward in a horizontal plane, as opposed to the typical upward freezing shown on a warmer surface. The self-delamination phenomenon is suppressed or reinstated by the combination of thermal and hydrophobic modifications of the surface, which can be taken advantage of for effective deicing schemes for icephobic surface applications.
AB - Although freezing of a droplet on cold surfaces is a universal phenomenon, its mechanisms are still inadequately understood, especially on the surfaces of which the temperature is lower than −60 °C. Here, we report the unique spontaneous deicing phenomena of a water droplet impacting on cold surfaces with a temperature as low as −120 °C. As a hydrophilic surface is cooled below a critically low temperature (e.g., −57 °C for a silicon surface with a native oxide), the impacting water droplet spontaneously delaminates from the substrate and freezes radially outward in a horizontal plane, as opposed to the typical upward freezing shown on a warmer surface. The self-delamination phenomenon is suppressed or reinstated by the combination of thermal and hydrophobic modifications of the surface, which can be taken advantage of for effective deicing schemes for icephobic surface applications.
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U2 - 10.1021/acs.langmuir.0c01523
DO - 10.1021/acs.langmuir.0c01523
M3 - Article
C2 - 32902998
AN - SCOPUS:85092120592
SN - 0743-7463
VL - 36
SP - 11245
EP - 11254
JO - Langmuir
JF - Langmuir
IS - 38
ER -