The Facile Synthesis of Novel ZnO Nanostructure for Galactose Biosensor Application

Abstract

We introduce a novel structure of ZnO nanorods (NRs) grown on ZnO NRs (ZnO NRs/NRs) via a facile, low-cost, and environmentally friendly synthesis for galactose biosensor application. The galactose oxidase enzyme (GalO x ) is immobilized on the ZnO NR/NR surface to form the novel electrode structure (GalO x |ZnO NRs/NRs). The GalO x |ZnO NR/NR electrode has a linear detection range of current density from 11.30 μA/mm 2 to 18.16 μA/mm 2 over a galactose concentration range from 40 mM to 230 mM, indicating the increment of electrode sensitivity up to 60.7%. The ZnO NR/NR morphology with a high surface area to volume ratio has a great contribution to the electrochemical performance of galactose biosensor. Our results propose a straightforward approach to fabricate architecturally ZnO-based nanostructure for biosensor application.

Improving the Performance of a Bioelectronic Tongue Using Silver Nanowires. Application to Milk Analysis

“…This is due to the large specific surface area and the higher number of active sites provided by nanowires that facilitate the electron transfer. Finally, the linear ranges observed were higher or at least comparable to other published enzymatic glucose oxidase, galactose oxidase or β-galactosidase biosensors [58][59][60][61][62].…”

“…The LODs were calculated using the 3σ/m criterion, where σ is the standard deviation for 5 measures of the blank and m is the slope of the calibration plot for the cathodic peak. The LODs obtained were lower or comparable to previously reported results for GOx, GaOx and β-gal immobilized on nanomaterials [58][59][60][61][62]. In addition, the LODs were lower when AgNWs were used as support, reaching values in the range of 10 -10 M, which is one order of magnitude lower than in the LODs obtained in the presence of AgNPs.…”

Electrical Characterization of Si/ZnO Nanorod PN Heterojunction Diode

“…However, heterojunctions of ZnO are realized with various semiconductors most commonly Si, GaN, and SiC for the fabrication of LEDs, Photodetectors, solar cells, biosensors, etc. [8][9][10][11].…”