A Systematic Study of the One-Pot Fabrication of Anisotropic Silver Nanoplates with Controllable Size and Shape for SERS
- PDF / 2,352,334 Bytes
- 10 Pages / 595.276 x 790.866 pts Page_size
- 20 Downloads / 151 Views
A Systematic Study of the One-Pot Fabrication of Anisotropic Silver Nanoplates with Controllable Size and Shape for SERS Amplification Tuan Anh Mai Ngoc 1,2 & Dinh Tien Dung Nguyen 3,4 & Vo Ke Thanh Ngo 1 & Phuong Phong Nguyen Thi 2 & Dai Hai Nguyen 5,6 & Minh-Tri Nguyen-Le 7,8 Received: 29 November 2019 / Accepted: 27 July 2020 # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstracts This study reported comprehensive and systematic investigations on size and shape control of silver nanoplates (SNPs) through a simple synthesis route where individual effects of each reactant on surface plasmon resonance of silver nanoplates were thoroughly investigated. SNPs were successfully fabricated via chemical reduction of AgNO3 with the aid of TSC, PVP, NaBH4, and H2O2 as a primary capping agent, secondary capping agent, reducing agent, and oxidative etchant, respectively. The role and effects of each reagent on the size and uniformity of SNPs during the synthesis were deeply investigated. The results showed that both TSC and H2O2 played critical roles in the growth of SNPs. Sufficient amount of TSC in the solution ([TSC]:[Ag+] molar ratio ≤ 22.5) would favor the formation of small-sized SNPs, while large-sized SNPs could be obtained at an excessive concentration of TSC. In addition to TSC, H2O2 was also essential for the formation of SNPs whose size increased with the addition of H2O2. In contrast, PVP did not play a major role in the formation of SNPs. It functioned as a secondary capping agent to prevent the formation of larger SNPs and facilitated the production of small-sized SNPs with equal uniformity. This role of PVP was particularly significant at the low level of TSC. The results were crucial for deeply understanding the individual effects of each reagent on the size and uniformity of SNPs so as to control the size and shape of SNPs for better surface-enhanced Raman scattering (SERS) signals of 4-mercapto benzoic acid (4-MBA). Keywords Silver . Nanoplates . Size . Plasmon . Chemical reduction
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11468-020-01240-5) contains supplementary material, which is available to authorized users. * Minh-Tri Nguyen-Le [email protected]
2
Faculty of Chemistry, University of Science, Vietnam National University Ho Chi Minh City, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City 70000, Vietnam
3
Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City 700000, Vietnam
4
Faculty of Natural Science, Duy Tan University, 550000 Danang City, Vietnam
5
Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 01TL29, District 12, 700000 Ho Chi Minh City, Vietnam
6
Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, 100000 Hanoi, Vietnam
Dai Hai Nguyen [email protected]
7
Laboratory of Advanced Materials Chemistry, Advanced Institute of Materials Science, Ton Duc Thang U
Data Loading...
