Email this article EFFECTS OF TIME ON THE GROWTH OF SILVER NANOPARTICLES USING PLASMON-MEDIATED METHOD UNDER THE IRRADIATION OF GREEN LED
About this article
Received: 06/03/19 Published: 08/03/19Authors
1. Vu Xuan Hoa
, University of Science – TNU2. Pham Minh Tan, University of Technology - TNU
3. Pham Thi Thu Ha, University of Science – TNU
4. Nguyen Van Dong, University of Science – TNU
5. Lo Thi Hue, University of Science – TNU
6. Do Manh Quyen, University of Science – TNU
7. Hoang Cao Nguyen, University of Science – TNU
8. Phan Thanh Phuong, University of Science – TNU
Abstract
In this paper, we present the results of the growth of silver nanoparticles (AgNPs) from spherical shape to triangular structure by the plasmon-mediated under the irradiation of green LED (532 ± 10 nm of wavelength) at the same power density of 0.51 mW/cm2 via time. The size, shape and optical properties of AgNPs were investigated by TEM and UV-Vis plasmon absorption spectrum. The results indicate that the size of AgNPs seed was average 14 nm in diameter. The size of egde triangular of AgNPs plate depends on time of irradiation of green LED and the ratio of concentration of [NaBH4]/[AgNO3]. Additionnally, when the time of ligth irradiation inscreases then the corner of the triangular nanoparticles became more truncated corresponding to surface plasmon band blue-shifted. These results show that there are many promising applications in the biomedical field, such as: SERS, biological sensors.
Keywords
plasmon absorption; spherical silver nanoparticles; triangle silver nanoparticles; TEM; LED
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