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Bài viết này trình bày các nano bạc dị hướng được chế tạo bằng phương pháp quang hóa bằng cách lần lượt kích thích ánh sáng LED xanh lá và LED xanh dương với các thời gian khác nhau lên các mầm nano cầu kích thước nhỏ (~7 nm). | TNU Journal of Science and Technology 226 07 143 - 150 FABRICATION OF ANISOTROPIC SILVER NANOPARTICLES BY COMBINATION OF BLUE AND GREEN LED IRRADIATION FOR MELAMIN DETECTION APPLICATIONS Vu Xuan Hoa TNU - University of Sciences ARTICLE INFO ABSTRACT Received 19 4 2021 This paper presents anisotropic silver nanoparticles fabricated by photochemical method by changing from blue to green radiation at Revised 18 5 2021 different exposure times on small spherical seed nanoparticles 7 nm . Published 24 5 2021 Morphology and size of obtained nanoparticles were investigated by field-emission scanning electron microscopy FESEM . Crystal KEYWORDS structure elemental composition was investigated by X-ray diffraction XRD and energy dispersion spectroscopy EDX . Optical properties Sylver nanoparticles of obtained silver nanoparticles product were analyzed by UV-Vis Surface enhanced Raman absorption spectroscopy. The obtained anisotropic silver nanoparticles scattering were triangular rounded triangular and cross-shaped flat plates and Absorption spectra nanodecahedra. Silver nanodecahedra were formed by stimulating on spherical silver nanoparticles under blue LED BLED . Triangular X-ray diffraction silver nanoparticles were formed when the seeds are excited by a green Melamin LED GLED . The results of investigating the applicability of silver nanoparticles for melamin detection by using surface enhancement Raman scattering SERS technique reached high sensitivity 10-6 M . The anisotropic silver nanoparticles promise to many interesting researches in analysis method and detecting toxic substances in food safety thanks to silver nanoparticles such as Raman sensors in the future. CHẾ TẠO CÁC NANO BẠC DỊ HƯỚNG BẰNG KÍCH THÍCH TỔ HỢP LED XANH LÁ VÀ LED XANH DƯƠNG CHO ỨNG DỤNG PHÁT HIỆN MELAMIN Vũ Xuân Hòa Trường Đại học Khoa học - ĐH Thái Nguyên THÔNG TIN BÀI BÁO TÓM TẮT Ngày nhận bài 19 4 2021 Bài báo này trình bày các nano bạc dị hướng được chế tạo bằng phương pháp quang hóa bằng
