Email this article EFFECT OF APPLIED VOLTAGE ON FORMATION OF GOLD NANOPARTICLES PREPARED BY ELECTROCHEMICAL METHOD AND THEIR OPTICAL PROPERTIES
About this article
Received: 06/03/19 Published: 08/03/19Authors
1. Vu Quang Khue
, Advanced Institute of Science and Technology - Hanoi University of Science and Technology2. Hoang Long, University of Science – TNU
3. Vu Thi Lanh, University of Science – TNU
4. Nguyen Thi Luyen, University of Science – TNU
5. Pham The Tan, Hung Yen University of Technology and Education
6. Tran Quang Huy, National Institute of Hygiene and Epidemiology
Abstract
This study was conducted to investigate the effect of applied voltage on formation of gold nanoparticles prepared by electrochemical method and their optical properties. Two gold bars were used as anode and cathode electrodes, one head of electrodes were connected to a DC source with a voltage of 0-15V, other heads were dipped in bi-distilled water. The voltage was applied with increment of 3V per experiment, and characteristic properties of formed gold nanoparticles were investigated by observing the color change with naked eye, ultraviolet-visible absorption spectra and transmission electron microscopy. The results showed that gold nanoparticles were formed by using a voltage of 6-15V, the color of solution changed from light pink to dark red by increasing the voltage. UV-vis spectra of gold coloidal solution peaked at 528 nm - 538 nm of wavelength depending on voltage applied. Gold nanoparticles were found as spherical shape, distributed in the narrow size of less than 20 nm. This study has provided a part of the overall picture for optimal conditions to prepare gold nanoparticles from bulk gold for various applications.
Keywords
gold nanoparticles; bulk gold; electrochemical synthesis; optical properties; nanomedicine
Full Text:
PDF (Tiếng Việt)Refbacks
- There are currently no refbacks.