Jump to main content
Jump to site search

Issue 22, 2013
Previous Article Next Article

Highly uniform and optical visualization of SERS substrate for pesticide analysis based on Au nanoparticles grafted on dendritic α-Fe2O3

Author affiliations

Abstract

Here, Au nanoparticles (NPs) grafted on dendritic α-Fe2O3 (NPGDF) are designed as a highly uniform surface-enhanced Raman scattering (SERS) substrate with a feature of optical visualization by an optical microscope (OM) system and used for in situ detection of pesticide residues that are annually used in agriculture. With this strategy, the dendritic α-Fe2O3 has been synthesized by a hydrothermal method and significantly functionalized by an inductively coupled plasma (ICP) apparatus and then Au NPs were grafted on it densely and uniformly. In addition, the profile of NPGDF can be clearly observed using an OM platform of a Raman spectrometer, and the profile of SERS spectral mapping with NPGDF as substrate almost exactly coincides with the OM image, the electron microscope (EM) image and the elemental mapping of NPGDF, which indicates remarkable uniformity of the NPGDF as SERS substrate, thus ensuring the laser beam focuses on the efficient sites of the substrate under the OM platform. Moreover, NPGDF can be dispersed in the liquor and the NPGDF microparticles can be adsorbed on the target surface. Therefore, it can be used for in situ detection of pesticide residues on tea leaves, fruits etc., with high sensitivity and reproducibility.

Graphical abstract: Highly uniform and optical visualization of SERS substrate for pesticide analysis based on Au nanoparticles grafted on dendritic α-Fe2O3

Back to tab navigation

Supplementary files

Publication details

The article was received on 17 Jul 2013, accepted on 30 Aug 2013 and first published on 05 Sep 2013


Article type: Paper
DOI: 10.1039/C3NR03671E
Citation: Nanoscale, 2013,5, 11193-11199
  •   Request permissions

    Highly uniform and optical visualization of SERS substrate for pesticide analysis based on Au nanoparticles grafted on dendritic α-Fe2O3

    X. Tang, W. Cai, L. Yang and J. Liu, Nanoscale, 2013, 5, 11193
    DOI: 10.1039/C3NR03671E

Search articles by author

Spotlight

Advertisements