A disposable electrochemical sensor based on electrospinning of molecularly imprinted nanohybrid films for highly sensitive determination of the organotin acaricide cyhexatin

Zhang C., Zhao F., He Y., She Y., Hong S., Ma J., ...Daha Fazla

MICROCHIMICA ACTA, cilt.186, sa.8, 2019 (SCI-Expanded, Scopus) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 186 Sayı: 8
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1007/s00604-019-3631-2
  • Dergi Adı: MICROCHIMICA ACTA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: Voltammetric sensor, Molecularly imprinted sensor, Electrospun nanofibers, SCREEN-PRINTED ELECTRODE, SOLID-PHASE EXTRACTION, GOLD NANOPARTICLES, GAS-CHROMATOGRAPHY, MASS-SPECTROMETRY, GRAPHENE OXIDE, NANOFIBERS, POLYMER, CARBON, SAMPLES
  • Atatürk Üniversitesi Adresli: Hayır

Özet

Nanofibrous polyporous membranes imprinted with cyhexatin (CYT) were formed via the ordered distribution of the imprints in electrospun nanofibers. The MIPs have a high mass transfer rate and enhanced adsorption capacity. In addition, a printed carbon electrode with enhanced sensitivity was developed via electrochemical fabrication of reduced graphene oxide (rGO) and gold nanoparticles (AuNPs). The molecularly imprinted sensor exhibits excellent selectivity and sensitivity for CYT. The structure and morphology of the nanohybrid films were characterized by using scanning electron microscopy, atomic force microscopy and chronoamperometry. The sensing performances were evaluated by cyclic voltammetry, differential pulse voltammetry and electrochemical impedance spectroscopy by using hexacyanoferrate(IV) as an electrochemical probe. The electrode, best operated at a working potential of around 0.16V (vs. Ag/AgCl), has a linear response in the1-800ngmL(-1) CYT concentration range and a detection limit of 0.17ngmL(-1) (at S/N=3). The sensor demonstrated satisfactory recoveries when applied to the determination of CYT in spiked pear samples.