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Molecularly imprinted photonic hydrogels as colorimetric sensors for rapid and label-free detection of vanillin.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Peng, Hailong Wang, Shenqi Zhang, Zhong Xiong, Hua Li, Jinhua Chen, Lingxin Li, Yanbin |
| Copyright Year | 2012 |
| Abstract | A novel colorimetric sensor for the rapid and label-free detection of vanillin, based on the combination of photonic crystal and molecular imprinting technique, was developed. The sensing platform of molecularly imprinted photonic hydrogel (MIPH) was prepared by a noncovalent and self-assembly approach using vanillin as a template molecule. Morphology characterization by scanning electron microscope (SEM) showed that the MIPH possessed a highly ordered three-dimensional (3D) macroporous structure with nanocavities. The vanillin recognition events of the created nonocavities could be directly transferred into readable optical signals through a change in Bragg diffraction of the ordered macropores array of MIPH. The Bragg diffraction peak shifted from 451 to 486 nm when the concentration of the vanillin was increased from 10⁻¹² to 10⁻³ mol L⁻¹ within 60 s, whereas there were no obvious peak shifts for methyl and ethyl vanillin, indicating that the MIPH had high selectivity and rapid response for vanillin. The adsorption results showed that the hierarchical porous structure and homogeneous layers were formed in the MIPH with higher adsorption capacity. The application of such a label-free sensor with high selectivity, high sensitivity, high stability, and easy operation might offer a potential method for rapid real-time detection of trace vanillin. |
| File Format | PDF HTM / HTML |
| DOI | 10.1021/jf204736p |
| PubMed reference number | 22292481 |
| Journal | Medline |
| Volume Number | 60 |
| Issue Number | 8 |
| Alternate Webpage(s) | http://ir.yic.ac.cn/bitstream/133337/5515/1/Molecularly%20Imprinted%20Photonic%20Hydrogels%20as%20Colorimetric%20Sensors.pdf |
| Alternate Webpage(s) | https://doi.org/10.1021/jf204736p |
| Journal | Journal of agricultural and food chemistry |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
