Title: Facile fabrication of silver nanowires and polyhedral silver nanoparticles as promising SERS substrates

Authors: Khuong Quoc Vo; Thu Anh Nguyen; Tuan-Kiet Duong; Tuyen Thi-Thanh Huynh; Tuan-Vu Pham; Minh-Vu Dinh Pham; Phuong-Phong Thi Nguyen

Addresses: Faculty of Chemistry, Department of Physical Chemistry, Ho Chi Minh City University of Science, Vietnam National University, Ho Chi Minh City, 227 Nguyen Van Cu Street, Ward 4, District 5, Ho Chi Minh City, 70000, Vietnam; Vietnam National University Ho Chi Minh City, Ho Chi Minh City, 70000, Vietnam ' Faculty of Chemistry, Department of Physical Chemistry, Ho Chi Minh City University of Science, Vietnam National University, Ho Chi Minh City, 227 Nguyen Van Cu Street, Ward 4, District 5, Ho Chi Minh City, 70000, Vietnam; Vietnam National University Ho Chi Minh City, Ho Chi Minh City, 70000, Vietnam ' Faculty of Chemistry, Department of Physical Chemistry, Ho Chi Minh City University of Science, Vietnam National University, Ho Chi Minh City, 227 Nguyen Van Cu Street, Ward 4, District 5, Ho Chi Minh City, 70000, Vietnam ' Faculty of Chemistry, Department of Physical Chemistry, Ho Chi Minh City University of Science, Vietnam National University, Ho Chi Minh City, 227 Nguyen Van Cu Street, Ward 4, District 5, Ho Chi Minh City, 70000, Vietnam ' Faculty of Chemistry, Department of Physical Chemistry, Ho Chi Minh City University of Science, Vietnam National University, Ho Chi Minh City, 227 Nguyen Van Cu Street, Ward 4, District 5, Ho Chi Minh City, 70000, Vietnam ' Faculty of Chemistry, Department of Physical Chemistry, Ho Chi Minh City University of Science, Vietnam National University, Ho Chi Minh City, 227 Nguyen Van Cu Street, Ward 4, District 5, Ho Chi Minh City, 70000, Vietnam ' Faculty of Chemistry, Department of Physical Chemistry, Ho Chi Minh City University of Science, Vietnam National University, Ho Chi Minh City, 227 Nguyen Van Cu Street, Ward 4, District 5, Ho Chi Minh City, 70000, Vietnam

Abstract: One-dimensional silver nanowires have gained considerable attention in various applications involving sensing, agriculture, antibacterial, and electric because of their distinctive electromagnetic and optical properties. Therefore, this study focuses on developing a rapid and facile controlled synthesis of silver nanowires (AgNWs) by the modified polyol method. Tailoring parameters such as time reaction, Na2S, and PVP concentration, silver nanoparticles were transformed from polygonal to wire nanostructures with a relatively high aspect ratio. The role of these factors that influenced AgNW formation was also clarified. AgNWs with an average length of approximately 6.5 μm and aspect ratio (length/width, R) of more than 600 were obtained with high yield. We investigated the SERS activity of PAgNPs/AgNWs-substrates in detecting methylene blue with a concentration ranging from 10^-5 M to 10^-9 M. The preliminary results indicate the PAgNPs/AgNWs-substrates have the potential for SERS substrate in trace analysis of organic compounds.

Keywords: silver nanowires; silver polygonal nanoparticles; SERS; methylene blue; polyol.

DOI: 10.1504/IJNT.2024.146453

International Journal of Nanotechnology, 2024 Vol.21 No.7/8/9/10/11/12, pp.478 - 489

Published online: 30 May 2025 *

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