Title: A photochemical method for fabrication of triangular silver nanoplates using light emission diodes for biosensors

Authors: Mai Ngoc Tuan Anh; Tran Thi Le Khanh; Huynh Trong Phat; Tieu Tu Doanh; Nguyen Thi Phuong Phong; Nguyen Thi To Uyen; Nguyen Vo Ky Duyen

Addresses: Research Laboratories of Sai Gon Hi-Tech Park, Lot I3, N2 Street, Tan Phu Ward, District 9, Ho Chi Minh City, 70000, Vietnam ' Research Laboratories of Sai Gon Hi-Tech Park, Lot I3, N2 Street, Tan Phu Ward, District 9, Ho Chi Minh City, 70000, Vietnam ' Research Laboratories of Sai Gon Hi-Tech Park, Lot I3, N2 Street, Tan Phu Ward, District 9, Ho Chi Minh City, 70000, Vietnam ' Research Laboratories of Sai Gon Hi-Tech Park, Lot I3, N2 Street, Tan Phu Ward, District 9, Ho Chi Minh City, 70000, Vietnam ' University of Science, Vietnam National University Ho Chi Minh City, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, 70000, Vietnam ' University of Science, Vietnam National University Ho Chi Minh City, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, 70000, Vietnam ' Ton Duc Thang University, Nguyen Huu Tho Street, Tan Phong Ward, District 7, Ho Chi Minh City, 70000, Vietnam

Abstract: Triangular silver nanoplates (TSPs) were synthesised by photochemical method. Manufacturing process includes two steps: (i) firstly, silver nanoparticles with 8-10 nm diameters were synthesised by reducing silver nitrate with sodium borohydride, (ii) secondly, these nanoparticles were irradiated by green light emission diodes (LEDs, 520 ± 20 nm, 20 W) at different times (6, 12, 18, 24, 48 and 72 h) to form TSPs. The results of the analysis from UV-Vis, FE-SEM and TEM showed that the quantity of TSPs was directly proportional to reaction time and the edge lengths of TSPs were 80-100 nm at 48 h. The surfaces of TSPs were functionalised with 3-mercaptopropionic acid and conjugated with anti-clenbuterol antibodies, using N-hydroxysuccinimide (NHS) and 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide (EDC) coupling chemistry for biosensor applications.

Keywords: TSPs; triangular silver nanoplates; photochemical method; light emission diodes; conjugate; clenbuterol.

DOI: 10.1504/IJNT.2018.099928

International Journal of Nanotechnology, 2018 Vol.15 No.11/12, pp.873 - 886

Available online: 27 May 2019 *

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