Structural evolution of PVP@Ag nanowires induced by focused electron beam irradiation: The passivation effect of PVP

Chi Hao; Jiangbin Su; Peng Pan; Litao Sun; Zuming He; Bin Tang

Journal of Materials Research and Technology (Mar 2024)

Structural evolution of PVP@Ag nanowires induced by focused electron beam irradiation: The passivation effect of PVP

Chi Hao,
Jiangbin Su,
Peng Pan,
Litao Sun,
Zuming He,
Bin Tang

Affiliations

Chi Hao: Experiment Center of Electronic Science and Technology, School of Microelectronics and Control Engineering, Changzhou University, Changzhou, 213159, People's Republic of China
Jiangbin Su: Experiment Center of Electronic Science and Technology, School of Microelectronics and Control Engineering, Changzhou University, Changzhou, 213159, People's Republic of China; SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing, 210096, People's Republic of China; Corresponding author. Experiment Center of Electronic Science and Technology, School of Microelectronics and Control Engineering, Changzhou University, Changzhou 213159, People's Republic of China.
Peng Pan: Experiment Center of Electronic Science and Technology, School of Microelectronics and Control Engineering, Changzhou University, Changzhou, 213159, People's Republic of China
Litao Sun: SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing, 210096, People's Republic of China; Corresponding author. SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing, 210096, People's Republic of China.
Zuming He: Experiment Center of Electronic Science and Technology, School of Microelectronics and Control Engineering, Changzhou University, Changzhou, 213159, People's Republic of China
Bin Tang: Experiment Center of Electronic Science and Technology, School of Microelectronics and Control Engineering, Changzhou University, Changzhou, 213159, People's Republic of China

Journal volume & issue: Vol. 29
pp. 1467 – 1475

Abstract

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To explore the passivation effect of polyvinylpyrrolidone (PVP) on Ag nanowires (NWs), the structural evolution of PVP@Ag NWs was in situ induced under focused electron beam (e-beam) irradiation using transmission electron microscopy. Notably, interesting phenomena, including multiple necking and axial elongation, were observed at room temperature. By establishing a kinetic relationship, the passivation effect of PVP on the radial shrinkage of Ag NW was confirmed, with a determined surface energy index (b) of 0.2. The presence of PVP not only weakened the surface nanocurvature effect of Ag NW but also retarded the athermal activation effect of energetic e-beam irradiation. By taking into account two new concepts of nanocurvature effect and athermal activation effect, the structure evolution of PVP@Ag NW was well restored by COMSOL simulation. Additionally, the radial shrinkage of Ag NWs with and without PVP coating was compared extensively. The simulation vividly illustrated the evaporation and diffusion processes of atoms, showcasing how PVP effectively mitigates material loss.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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