TY - JOUR
T1 - Modeling of an atmospheric pressure plasma-liquid anodic interface
T2 - Solvated electrons and silver reduction
AU - Zheng, Yashuang
AU - Wang, Lijun
AU - Bruggeman, Peter
N1 - Publisher Copyright:
© 2020 Author(s).
PY - 2020/12/1
Y1 - 2020/12/1
N2 - Solvated electrons (eaq-) generated by atmospheric pressure plasmas in contact with liquids are a key source of plasma-induced liquid chemistry that enable applications in biotechnology and nanoparticle synthesis. In this paper, we report liquid phase reactive species concentrations near an anodic plasma-liquid interface as described by a fluid model. In particular, the interfacial structures and plasma-induced reactive species in NaCl and AgNO3 solutions as generated by a pulsed plasma are highlighted. The results show that the magnitude and the penetration depth of the eaq- concentration in AgNO3 solution are smaller than that in the NaCl solution due to the scavenger reactions of eaq- by Ag+ and NO3-. The early products of the plasma-induced Ag+ reduction are also presented, and the impact of the current density, the pulse width, and the AgNO3 concentration on the silver reduction is analyzed. It is further shown that a typical OH radical flux present in such plasmas can highly impact the eaq- concentration and the Ag+ reduction while the impact of vacuum ultraviolet radiation, H, and H2O2 is less pronounced.
AB - Solvated electrons (eaq-) generated by atmospheric pressure plasmas in contact with liquids are a key source of plasma-induced liquid chemistry that enable applications in biotechnology and nanoparticle synthesis. In this paper, we report liquid phase reactive species concentrations near an anodic plasma-liquid interface as described by a fluid model. In particular, the interfacial structures and plasma-induced reactive species in NaCl and AgNO3 solutions as generated by a pulsed plasma are highlighted. The results show that the magnitude and the penetration depth of the eaq- concentration in AgNO3 solution are smaller than that in the NaCl solution due to the scavenger reactions of eaq- by Ag+ and NO3-. The early products of the plasma-induced Ag+ reduction are also presented, and the impact of the current density, the pulse width, and the AgNO3 concentration on the silver reduction is analyzed. It is further shown that a typical OH radical flux present in such plasmas can highly impact the eaq- concentration and the Ag+ reduction while the impact of vacuum ultraviolet radiation, H, and H2O2 is less pronounced.
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U2 - 10.1116/6.0000575
DO - 10.1116/6.0000575
M3 - Article
AN - SCOPUS:85095445698
SN - 0734-2101
VL - 38
JO - Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
JF - Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
IS - 6
M1 - 575
ER -