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Highly sensitive label-free bio-interfacial colorimetric sensor based on silk fibroin-gold nanocomposite for facile detection of chlorpyrifos pesticide
- Source :
- Scientific Reports, Scientific Reports, Vol 10, Iss 1, Pp 1-14 (2020)
- Publication Year :
- 2020
- Publisher :
- Nature Publishing Group UK, 2020.
-
Abstract
- Herein, the preparation of gold nanoparticles-silk fibroin (SF-AuNPs) dispersion and its label-free colorimetric detection of the organophosphate pesticide, namely chlorpyrifos, at ppb level are reported. The silk fibroin solution was extracted from B. mori silk after performing degumming, dissolving and dialysis steps. This fibroin solution was used for synthesis of gold nanoparticles in-situ without using any external reducing and capping agent. X-ray Diffractometry (XRD), Field Emission Transmission Electron Microscopy (FETEM) along with Surface Plasmon Resonance based optical evaluation confirmed generation of gold nanoparticles within SF matrix. The resultant SF-AuNPs dispersion exhibited rapid and excellent colorimetric pesticide sensing response even at 10 ppb concentration. Effect of additional parameters viz. pH, ionic concentration and interference from other pesticide samples was also studied. Notably, SF-AuNPs dispersion exhibited selective colorimetric pesticide sensing response which can be calibrated. Furthermore, this method was extended to various simulated real life samples such as tap water, soil and agricultural products including plant residues to successfully detect the presence of chlorpyrifos pesticide. The proposed colorimetric sensor system is facile yet effective and can be employed by novice rural population and expert researchers alike. It can be exploited as preliminary tool for label-free colorimetric chlorpyrifos pesticide sensing in water and agricultural products.
- Subjects :
- Fibroin
lcsh:Medicine
Metal Nanoparticles
02 engineering and technology
01 natural sciences
Article
Nanocomposites
Matrix (chemical analysis)
chemistry.chemical_compound
Tap water
Microscopy, Electron, Transmission
X-Ray Diffraction
Surface plasmon resonance
Pesticides
lcsh:Science
Multidisciplinary
Nanocomposite
Chemistry
010401 analytical chemistry
lcsh:R
fungi
Environmental monitoring
021001 nanoscience & nanotechnology
0104 chemical sciences
Colloidal gold
Spectrophotometry
Chlorpyrifos
Hydrodynamics
Nanoparticles
lcsh:Q
Colorimetry
Gold
0210 nano-technology
Dispersion (chemistry)
Fibroins
Nuclear chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 20452322
- Volume :
- 10
- Database :
- OpenAIRE
- Journal :
- Scientific Reports
- Accession number :
- edsair.doi.dedup.....117c265b44233bc50c21baabc4358760