An enzyme free Vitamin C augmented sensing with different ZnO morphologies on SnO2/F transparent glass electrode: A comparative study.
Three types of Zinc oxide (ZnO) nanostructures viz. ZnO nanocrystals (ZnONCs), ZnO nanoparticles (ZnONPs) and ZnO nanobelts (ZnONBs) were synthesized and characterized by UV-Vis, FTIR and SEM. A comparison of signal amplification by these ZnO nanostructures as judged by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and Linear Sweep Voltammetry (LSV) revealed that ZnONCs are better sensing interface for electrochemical detection. When these ZnO nanostructure were compared electrochemically for sensing Vitamin C, ZnONC's sensor outperformed the ZnONP and ZnONB sensor and previously reported sensors. The ZnONCs/MB/FTO electrode showed a wide linear sensing range (0.001μM to 4000μM), low detection limit (0.0001μM), a small response time (5s) and a storage stability of 6months. To the best of our knowledge, this elevated sensitivity and remarkable stability for electrochemical Vitamin C detection using ZnONC's have not been reported so far.
Amity Institute of Nanotechnology, Amity University, Noida, UP, India.
Chaitali
C
Singhal
Amity Institute of Physiotherapy, Amity University, Noida, UP, India. Electronic address: malhotra.nitesh@yahoo.co.in.
Nitesh
N
Malhotra
Department of Biochemistry, M. D. University, Rohtak, Haryana, India.
C S
CS
Pundir
Amity Institute of Biotechnology, Amity University, Noida, UP, India.
Deepshikha
Amity Institute of Nanotechnology, Amity University, Noida, UP, India. Electronic address: jags_biotech@yahoo.co.in.
Jagriti
J
Narang
D001205:Ascorbic Acid / Q000032:analysis*; D001628:Beverages; D002138:Calibration; D058266:Dielectric Spectroscopy; D055664:Electrochemical Techniques; D004566:Electrodes; D005461:Fluorine / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D057230:Limit of Detection; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D017971:Tin Compounds / Q000737:chemistry*; D014961:X-Ray Diffraction; D015034:Zinc Oxide / Q000737:chemistry*
D017971:Tin Compounds; D005461:Fluorine; C045358:stannic oxide; D001205:Ascorbic Acid; D015034:Zinc Oxide
Ascorbic acid; CV; EIS; LSV; Methylene blue; Vitamin C; ZnO nanobelts; ZnO nanocrystals; ZnO nanoparticles