Subramani, I.G. and Perumal, V. and Gopinath, S.C.B. and Mohamed, N.M. and Joshi, N. and Ovinis, M. and Sze, L.L. (2020) 3D nanoporous hybrid nanoflower for enhanced non-faradaic redox-free electrochemical impedimetric biodetermination. Journal of the Taiwan Institute of Chemical Engineers, 116. pp. 26-35. ISSN 18761070
Full text not available from this repository.Abstract
Recently, non-faradaic electrochemical impedimetric (nfEIS) has been identified as a dynamic and robust method for bio-determining. However, the success of a nfEIS approach largely depends on its sensing layer architecture. In this study, the use of a Glutaraldehyde (GA) crosslinked copper (Cu) � bovine serum albumin (BSA) hybrid nanoflower with three-dimensional nanoporous architecture for the sensing layer was investigated. The nanoflower morphology changes were observed under FESEM, revealing loosely interlaced nanoflower into a tightly interlaced, highly porous structure upon GA crosslinking. This nanoflower was hybridized to immobilize aminated-DNA probe on the transducer surface and detect the target TB DNA in their natural redox-free environment. FTIR and XPS characterization showed distinct peaks at 950�1100 cm�1 (P-O, P=O bonds from nanoflower and DNA backbone) and 286.48 eV (interaction between BSA and aminated DNA), respectively, validating the successful DNA probe immobilization on the nanoflower surface. Furthermore, impedimetric sensing in a redox-free environment showed that the developed TB biosensor present has a detection limit (LOD) of 60 pM with a (linear) range from 1 pM to 1 µM with good reproducibility. This redox-free non-faradaic EIS offers excellent biosensing potential and may be extended for diagnosing other biomarkers in clinical practice. © 2020 Taiwan Institute of Chemical Engineers
Item Type: | Article |
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Additional Information: | cited By 10 |
Uncontrolled Keywords: | DNA; Mammals; Morphology; Probes, Bovine serum albumins; Clinical practices; Detection limits; Morphology changes; Porous structures; Reproducibilities; Transducer surface; XPS characterization, Nanoflowers |
Depositing User: | Mr Ahmad Suhairi UTP |
Date Deposited: | 10 Nov 2023 03:27 |
Last Modified: | 10 Nov 2023 03:27 |
URI: | https://khub.utp.edu.my/scholars/id/eprint/12536 |