Gold Nanoparticle-Decorated Silver Needle for Surface-Enhanced Raman Spectroscopy Screening of Residual Malachite Green in Aquaculture Products

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

View graph of relations

Author(s)

  • Binbin Zhou
  • Pan Li
  • Meihong Ge
  • Dongyue Lin
  • Liangbao Yang

Detail(s)

Original languageEnglish
Pages (from-to)2752-2757
Journal / PublicationACS Applied Nano Materials
Volume2
Issue number5
Early online date10 Apr 2019
Publication statusPublished - 24 May 2019

Abstract

We demonstrate a novel in vivo sampling device for preparation-free quantitative detection of residual malachite green in fish with depth profiles. The device is a surface-enhanced Raman scattering (SERS)-active acupuncture silver needle carved with an array of micrometer-sized grooves for trapping polyvinylpyrrolidone (PVP)-stabilized Au nanopartides (Au NPs). The microgrooves not only prevented the absorbed Au NPs being erased during insertion but also provided observation/locating convenience under the optical microscope of the Raman spectrometer. Moreover, the Au NPs anchored onto the Ag needle help improve the sensitivity of the SERS measurements, while the plasmon coupling between the Ag needle and Au NPs greatly amplifies the SERS signal. Furthermore, the PVP on the surface of the Au NPs serves as an inherent internal calibration standard leads to reduced SERS signal fluctuation, holding promising for quantitative SERS detection. The fabricated Au NPs-groove-trapped Ag needles (Au-G-AgNs) are further applied for in vivo detection of malachite green, a prohibited carcinogen commonly found in aquaculture products that are expensive and complicated to detect by current techniques. The result shows that in vivo detection of malachite green at an ultralow concentration of 0.1 nM is achieved, demonstrating the capability of the SERS sampler for ultrasensitive in vivo detection with minimal invasion.

Research Area(s)

  • in vivo detection, silver acupuncture needle, minimally invasive, groove, quantitative SERS, IN-VIVO, SCATTERING DETECTION, ACUPUNCTURE NEEDLE, AU NANOPARTICLES, MONOLAYER FILM, SERS SENSOR, LARGE-SCALE, STRATEGY, NANORODS

Citation Format(s)

Gold Nanoparticle-Decorated Silver Needle for Surface-Enhanced Raman Spectroscopy Screening of Residual Malachite Green in Aquaculture Products. / Zhou, Binbin; Shen, Junda; Li, Pan; Ge, Meihong; Lin, Dongyue; Li, Yang Yang; Lu, Jian; Yang, Liangbao.

In: ACS Applied Nano Materials, Vol. 2, No. 5, 24.05.2019, p. 2752-2757.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review