TY - JOUR ID - 21441 TI - Fast and clean dielectric barrier discharge plasma functionalization of carbon nanotubes decorated by electrodeposited nickel oxide: Application to glucose biosensors JO - Scientia Iranica JA - SCI LA - en SN - 1026-3098 AU - Khodadadi, A.A. AU - Mortazavi, Y. AU - Vesali-Naseh, M. AD - Catalysis and Nanostructured Laboratory, School of Chemical Engineering, University of Tehran, Tehran, Iran AD - Nanoelectronics Centre of Excellence, University of Tehran, Tehran, P.O. Box 11365-4563, Iran. AD - Department of Chemical Engineering, Hamedan University of Technology, Hamedan, 65155, Iran Y1 - 2019 PY - 2019 VL - 26 IS - 6 SP - 3896 EP - 3904 KW - Plasma KW - Functional KW - carbon nanotubes KW - Nickel KW - Biosensor DO - 10.24200/sci.2019.51666.2302 N2 - Multi-walled carbon nanotubes (MWCNTs) were functionalized using a dielectric barrier discharge plasma in presence of H2O-saturated air at 70˚C and atmospheric pressure. The functionalized MWCNTs (F-CNTs) were decorated with electrochemically deposited 10 nm NiO nanoparticles, followed by immobilization of glucose oxidase (GOx) and the modified electrode was utilized for electrochemical detection of glucose. TEM, FE-SEM, TPD and XPS techniques were used to characterize the NiO/F-CNTs samples. The maximum amount of oxygenated functional groups such as carbonyl, hydroxyl and carboxylic groups was formed at the plasma exposure time of 4 min. The optimum chronoamperometric deposition time of NiO was 3 min. The presence of GOx on the NiO/F-CNTs electrode displayed a quasi-reversible and surface-controlled redox wave around −0.52 V with a peak to peak separation of 0.05 V. The GOx/NiO/F-CNTs electrode showed a linear performance in the range of 0.2-3.8 mM glucose with detection limit of 93.0 µM and sensitivity of 2.16 µA.mM−1. UR - https://scientiairanica.sharif.edu/article_21441.html L1 - https://scientiairanica.sharif.edu/article_21441_4fe637b3e682568055d978e9f8e8b238.pdf ER -