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Open AccessArticle

Photochemical Synthesis of Silver Nanodecahedrons under Blue LED Irradiation and Their SERS Activity

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Research Laboratories of Sai Gon Hi-Tech Park, Lot I3, N2 Street, Tan Phu Ward, District 9, Ho Chi Minh City 70000, Vietnam
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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
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Institute of Research and Development, Duy Tan University, Danang 550000, Vietnam
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Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 01 TL29, District 12, Ho Chi Minh City 700000, Vietnam
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Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
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Laboratory of Advanced Materials Chemistry, Advanced Institute of Materials Science, Ton Duc Thang University, Ho Chi Minh City 758307, Vietnam
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Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City 758307, Vietnam
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Author to whom correspondence should be addressed.
Processes 2020, 8(3), 292; https://doi.org/10.3390/pr8030292
Received: 15 February 2020 / Revised: 1 March 2020 / Accepted: 2 March 2020 / Published: 4 March 2020
(This article belongs to the Special Issue Synthesis and Application of Nano- and Microdispersed Systems)
Silver nanodecahedrons were successfully synthesized by a photochemical method under irradiation of blue light-emitting diodes (LEDs). The formation of silver nanodecahedrons at different LED irradiation times (0–72 h) was thoroughly investigated by employing different characterization methods such as ultraviolet–visible spectroscopy (UV–Vis), transmission electron microscopy (TEM), and Raman spectroscopy. The results showed that silver nanodecahedrons (AgNDs) were formed from silver nanoseeds after 6 h of LED irradiation. The surface-enhanced Raman scattering (SERS) effects of the synthesized AgNDs were also studied in comparison with those of spherical silver nanoparticles in the detection of 4-mercapto benzoic acid. Silver nanodecahedrons with a size of 48 nm formed after 48 h of LED irradiation displayed stronger SERS properties than spherical nanoparticles because of electromagnetic enhancement. The formation mechanism of silver nanodecahedrons is also reported in our study. The results showed that multihedral silver nanoseeds favored the formation of silver nanodecahedrons. View Full-Text
Keywords: silver nanodecahedron; SERS; photochemical synthesis; LEDs silver nanodecahedron; SERS; photochemical synthesis; LEDs
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Tuan Anh, M.N.; Nguyen, D.T.D.; Ke Thanh, N.V.; Phuong Phong, N.T.; Nguyen, D.H.; Nguyen-Le, M.-T. Photochemical Synthesis of Silver Nanodecahedrons under Blue LED Irradiation and Their SERS Activity. Processes 2020, 8, 292.

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