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- Title
Boosting the Photocatalytic Ability of TiO 2 Nanosheet Arrays for MicroRNA-155 Photoelectrochemical Biosensing by Titanium Carbide MXene Quantum Dots.
- Authors
Yan, Bingdong; Cheng, Zike; Lai, Caiyan; Qiao, Bin; Yuan, Run; Zhang, Chide; Pei, Hua; Tu, Jinchun; Wu, Qiang
- Abstract
The electrodes of two-dimensional (2D) titanium dioxide (TiO2) nanosheet arrays were successfully fabricated for microRNA-155 detection. The (001) highly active crystal face was exposed to catalyze signaling molecules ascorbic acid (AA). Zero-dimensional (0D) titanium carbide quantum dots (Ti3C2Tx QDs) were modified to the electrode as co-catalysts and reduced the recombination rate of the charge carriers. Spectroscopic methods were used to determine the band structure of TiO2 and Ti3C2Tx QDs, showing that a type Ⅱ heterojunction was built between TiO2 and Ti3C2Tx QDs. Benefiting the advantages of materials, the sensing platform achieved excellent detection performance with a wide liner range, from 0.1 pM to 10 nM, and a low limit of detection of 25 fM (S/N = 3).
- Subjects
TITANIUM carbide; QUANTUM dots; TITANIUM dioxide; VITAMIN C; CHARGE carriers; TITANIUM dioxide nanoparticles
- Publication
Nanomaterials (2079-4991), 2022, Vol 12, Issue 20, p3557
- ISSN
2079-4991
- Publication type
Article
- DOI
10.3390/nano12203557