Non-enzymatic sensors based on in situ laser-induced synthesis of copper-gold and gold nano-sized microstructures.
The synthesis of conductive gold and copper-gold microstructures with high developed surface based on the method of laser-induced metal deposition from solution was developed. The topology and crystallization phase of these structures were observed by means of scanning electron microscopy and X-ray diffraction, respectively. The electrochemical properties of the synthesized materials were investigated using cyclic voltamperometry and amperometry. According to the obtained results, it was found out that copper-gold microstructures demonstrate a linear dependence of Faraday current vs. concentration from 0.025 to 5µM for D-glucose and from 0.025 to 10µM for hydrogen peroxide. In turn, gold deposit exhibits a linear dependence of Faraday current vs. concentration from 0.025 to 50µM for D-glucose and from 0.025 to 1µM for hydrogen peroxide. Moreover, the synthesized materials reveal low detection limits (0.025µM) with respect to the aforementioned analytes, which is quite promising for their potential application in design and fabrication of new non-enzymatic biosensors.
Saint Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034 Russia.
Maxim S
MS
Panov
Saint Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034 Russia.
Olga A
OA
Vereshchagina
Saint Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034 Russia.
Sergey S
SS
Ermakov
Saint Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034 Russia.
Ilya I
II
Tumkin
Saint Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034 Russia.
Evgeniia M
EM
Khairullina
Saint Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034 Russia.
Mikhail Yu
MY
Skripkin
Saint Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034 Russia.
Andrey S
AS
Mereshchenko
Saint Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034 Russia; Saint-Petersburg Scientific Center RAS, 5 Universitetskaya nab., St. Petersburg 199034 Russia.
Mikhail N
MN
Ryazantsev
Saint Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034 Russia. Electronic address: lasergroupspb@gmail.com.
Vladimir A
VA
Kochemirovsky
Copper; Cyclic voltammetry; Electrochemical electrodes; Gold; Laser-induced deposition; Non-enzymatic sensors