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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Ma, Meng-jie Li, Yong-jie Kong, Yong Yin, Gui Zhu, Jun-jie |
| Description | Author Affiliation: Li YJ ( State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China.) |
| Abstract | A novel strategy is developed for the fabrication of graphene–CdS (G–CdS) nanocomposites by in situ growth of CdS nanoparticles onto simultaneously reduced graphite oxide, which is noncovalently functionalized by sodium 1-pyrene sulfonate through strong π–π stacking interactions. Subsequently, cobalt 2,9,16,23-tetraaminophthalocyanine (CoTAPc) is self-assembled on the G–CdS nanocomposites through electrostatic interactions to produce phthalocyanine-sensitized G–CdS nanocomposites. The photoactive superstructure enhances the photocurrent generation capability, and presents an efficient photoelectrochemical immunosensing platform for the ultrasensitive detection of the prostate-specific antigen (PSA). The quantitative measurement of PSA is based on the decrease in the photocurrent intensity of the phthalocyanine-sensitized G–CdS nanocomposites, which results from an increase in the steric hindrance due to the formation of the immunocomplex. A linear relationship between the photocurrent decrease and the PSA concentration is obtained in the wide range from $1 pg mL^{−1}$ to $5 μg mL^{−1}$ with a detection limit of $0.63 pg mL^{−1}.$ The proposed sensor shows high sensitivity, stability, reproducibility, and can become a promising platform for other biomolecular detection. |
| ISSN | 09476539 |
| e-ISSN | 15213765 |
| Journal | Chemistry - A European Journal |
| Issue Number | 14 |
| Volume Number | 19 |
| Language | English |
| Publisher | Wiley-VCH;ChemPubSoc Europe |
| Publisher Date | 2013-04-02 |
| Publisher Place | Germany |
| Access Restriction | Open |
| Subject Keyword | Graphite Chemistry Indoles Nanocomposites Biosensing Techniques Limit Of Detection Photochemical Processes Prostate-Specific Antigen Reproducibility Of Results Research Support, Non-U.S. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Organic Chemistry Catalysis |
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