Graphene nanoplatelet/graphitized nanodiamond-based nanocomposite for mediator-free electrochemical sensing of urea
- Title
- Graphene nanoplatelet/graphitized nanodiamond-based nanocomposite for mediator-free electrochemical sensing of urea
- Author
- 김기현
- Keywords
- Graphene nanoplatelets; Graphitized nanodiamonds; Urea; Sensing; Screen-printed electrode
- Issue Date
- 2020-01
- Publisher
- ELSEVIER SCI LTD
- Citation
- FOOD CHEMISTRY, v. 303, article no. 125375
- Abstract
- Urea is well-known to offer tremendous scope for sensing/diagnosing such as adulteration in dairy products or diseases in human body. This study was organized to describe and validate a new mediator-free, unsophisticated, and direct current voltage (IV)-based sensor for facile detection of urea using nanocomposites made of urease-immobilized graphene nanoplatelets and graphitized nanodiamonds. This nanocomposite displayed sensitive and direct signal in the form of current at 0 V without the need of any complex chemical reaction. This platform was highly sensitive (limit of detection of 5 mu g/mL) far superior to the comparable systems introduced recently. The incorporation of graphitized nanodiamonds within the graphene nanoplatelets layers helped improve the sensitivity by a factor of three (up to 806.3 mu A (mg mL(-1))(-1) cm(-2)) with 20 s response time. As such, the use of this nanocomposite was helpful in improving sensing performances with enhanced enzyme loading capacity.
- URI
- https://www.sciencedirect.com/science/article/pii/S030881461931489X?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/160890
- ISSN
- 0308-8146; 1873-7072
- DOI
- 10.1016/j.foodchem.2019.125375
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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