TY - JOUR
T1 - Nanoscale Hydrophobicity and Electrochemical Mapping Provides Insights into Facet Dependent Silver Nanoparticle Dissolution
AU - Ma, Qingquan
AU - Young, Joshua
AU - Gao, Jianan
AU - Tao, Yi
AU - Zhang, Wen
N1 - Funding Information:
This study is supported by the US National Science Foundation (Award number: 1756444), NSF Intern grant (Award number: 1836036), and the New Jersey Water Resources Research Institute (NJWRRI) Grant (Project Number: 2020NJ025B). DFT calculations were performed on the Kong and Lochness clusters at the New Jersey Institute of Technology, the Extreme Science and Engineering Discovery Environment (XSEDE, supported by NSF Grant No. ACI-1053575) under allocation TG-DMR180009, and the CARBON cluster at the Center for Nanoscale Materials under allocations CNM72868 and CNM77374. Work performed at the Center for Nanoscale Materials, a U.S. Department of Energy Office of Science User Facility, was supported by the U.S. DOE, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.
Publisher Copyright:
© 2023 American Chemical Society.
PY - 2023/3/16
Y1 - 2023/3/16
N2 - Metal or metallic nanoparticle dissolution influences particle stability, reactivity, potential fate, and transport. This work investigated the dissolution behavior of silver nanoparticles (Ag NPs) in three different shapes (nanocube, nanorod, and octahedron). The hydrophobicity and electrochemical activity at the local surfaces of Ag NPs were both examined using atomic force microscopy (AFM) coupled with scanning electrochemical microscopy (AFM-SECM). The surface electrochemical activity of Ag NPs more significantly affected the dissolution than the local surface hydrophobicity did. Octahedron Ag NPs with dominant surface exposed facets of {111} dissolved faster than the other two kinds of Ag NPs. Density functional theory (DFT) calculation revealed that the {100} facet elicited greater affinities toward H2O than the {111} facet. Thus, poly(vinylpyrrolidone) or PVP coating on the {100} facet is critical for stabilizing and prevent the {100} facet from dissolution. Finally, COMSOL simulations demonstrated consistent shape dependent dissolution as we observed experimentally.
AB - Metal or metallic nanoparticle dissolution influences particle stability, reactivity, potential fate, and transport. This work investigated the dissolution behavior of silver nanoparticles (Ag NPs) in three different shapes (nanocube, nanorod, and octahedron). The hydrophobicity and electrochemical activity at the local surfaces of Ag NPs were both examined using atomic force microscopy (AFM) coupled with scanning electrochemical microscopy (AFM-SECM). The surface electrochemical activity of Ag NPs more significantly affected the dissolution than the local surface hydrophobicity did. Octahedron Ag NPs with dominant surface exposed facets of {111} dissolved faster than the other two kinds of Ag NPs. Density functional theory (DFT) calculation revealed that the {100} facet elicited greater affinities toward H2O than the {111} facet. Thus, poly(vinylpyrrolidone) or PVP coating on the {100} facet is critical for stabilizing and prevent the {100} facet from dissolution. Finally, COMSOL simulations demonstrated consistent shape dependent dissolution as we observed experimentally.
UR - http://www.scopus.com/inward/record.url?scp=85149739955&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85149739955&partnerID=8YFLogxK
U2 - 10.1021/acs.jpclett.2c03917
DO - 10.1021/acs.jpclett.2c03917
M3 - Article
C2 - 36892279
AN - SCOPUS:85149739955
SN - 1948-7185
VL - 14
SP - 2665
EP - 2673
JO - Journal of Physical Chemistry Letters
JF - Journal of Physical Chemistry Letters
IS - 10
ER -