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Flexible Hydrophobic CFP@PDA@AuNPs Stripes for Highly Sensitive SERS Detection of Methylene Blue Residue
| Content Provider | MDPI |
|---|---|
| Author | Dong, Jinchen Wang, Tangchun Xu, Enze Bai, Feng Liu, Jun Zhang, Zhiliang |
| Copyright Year | 2022 |
| Description | Considering the inherent hydrophilic and porous nature of paper, the rapid absorption and diffusion of aqueous analyte solutions on paper-based SERS substrates may severely affect the Raman detection sensitivity and accuracy in the detection of target molecules. In this work, a series of hydrophobic CFP@PDA@AuNPs stripes were obtained through in situ synthesizing of gold nanoparticles (AuNPs) on a polydopamine (PDA)-decorated cellulose filter paper (CFP) and functionalized with perfluorodecanethiol (PFDT). When the SERS performance of the substrates was examined using 4-ATP, the hydrophobic CFP@PDA@AuNPs substrate showed superior sensitivity, reproducibility and stability due to the hydrophobic enrichment effect, with the detection limit decreasing to $10^{−9}$ M and the enhancement factor as high as 2.55 × $10^{7}$. More importantly, it was feasible to apply the hydrophobic paper substrate as an excellent SERS sensor to detect methylene blue (MB) residues in lake water in a highly sensitive manner. The lowest detectable limit of MB was 100 nM, and it showed a low relatively standard deviation (RSD) value of 5.28%. Hydrophobic CFP@PDA@AuNPs stripes may serve as excellent sensors for target molecule detection and have tremendous potential in food security, and environmental and chemical detection. |
| Starting Page | 2163 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano12132163 |
| Journal | Nanomaterials |
| Issue Number | 13 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-06-23 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Analytical Chemistry Hydrophobicity Gold Nanoparticles Sers Cfp@pda@aunps Stripes Methylene Blue |
| Content Type | Text |
| Resource Type | Article |
