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Carbohydrate polymers v.189, 2018년, pp.79 - 86   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Facile synthesis of cellulose nanofiber nanocomposite as a SERS substrate for detection of thiram in juice

Xiong, Ziyi (Food Science Program, Division of Food System & Bioengineering, University of Missouri, Columbia, MO 65211-5160, USA ) ; Lin, Mengshi (Food Science Program, Division of Food System & Bioengineering, University of Missouri, Columbia, MO 65211-5160, USA ) ; Lin, Hetong (College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China ) ; Huang, Meizhen (Department of Instrument Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China ) ;
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    Abstract There has been growing interest in the use of nanocellulose-based substrate for surface-enhanced Raman spectroscopy (SERS) applications. This study aimed to use cellulose nanofibers (CNF) to develop novel CNF-based nanocomposite as a SERS substrate. CNF were cationized with ammonium ions and then interacted with citrate-stabilized gold nanoparticles (AuNPs) via electrostatic attraction to form uniform nanocomposites. The CNF-based nanostructures were loaded with AuNPs that were firmly adhered on the CNF surfaces, providing a three-dimensional plasmonic SERS platform. A Raman-active probe molecule, 4-aminothiophenol, was selected to evaluate the sensitivity and reproducibility of CNF-based SERS substrate. The intensity of SERS spectra obtained from CNF/AuNP nanocomposite was 20 times higher than that from the filter paper/AuNP substrate. The SERS intensity map demonstrates good uniformity of the CNF/AuNP substrate. CNF/AuNP nanocomposites were used in rapid detection of thiram in apple juice by SERS and a limit of detection of 52 ppb of thiram was achieved. These results demonstrate that CNF/AuNP nanocomposite can be used for rapid and sensitive detection of pesticides in food products. Highlights Facile synthesis of cellulose nanofibers (CNF) nanocomposite coated with gold nanoparticles (AuNPs) was achieved. The CNF/AuNP nanocomposite was used as a sensitive and uniform surface-enhanced Raman spectroscopy (SERS) substrate. The CNF/AuNP substrate can be utilized for rapid detection of thiram residues in apple juice.


  • 주제어

    Cellulose nanofiber .   Gold nanoparticles .   SERS .   Thiram.  

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