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      Newly designed silver coated-magnetic, monodisperse polymeric microbeads as SERS substrate for low-level detection of amoxicillin

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      Author
      Kibar, G.
      Topal, A. E.
      Dana, A.
      Tuncel, A.
      Date
      2016-09
      Source Title
      Journal of Molecular Structure
      Print ISSN
      0022-2860
      Publisher
      Elsevier
      Volume
      1119
      Pages
      133 - 138
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      We report the preparation of silver-coated magnetic polymethacrylate core-shell nanoparticles for use in surface-enhanced Raman scattering based drug detection. Monodisperse porous poly (mono-2-(methacryloyloxy)ethyl succinate-co-glycerol dimethacrylate), poly (MMES-co-GDMA) microbeads of ca. 5 μm diameter were first synthesized through a multistage microsuspension polymerization technique to serve as a carboxyl-bearing core region. Microspheres were subsequently magnetized by the co-precipitation of ferric ions, aminated through the surface hydroxyl groups and decorated with Au nanoparticles via electrostatic attraction. An Ag shell was then formed on top of the Au layer through a seed-mediated growth process, resulting in micron-sized monodisperse microbeads that exhibit Raman enhancement effects due to the roughness of the Ag surface layer. The core-shell microspheres were used as a new substrate for the detection of amoxicillin at trace concentrations up to 10-8 M by SERS. The proposed SERS platform can be evaluated as a useful tool for the follow-up amoxicillin pollution and low-level detection of amoxicillin in aqueous media.
      Keywords
      Ag nanoparticles
      Amoxicillin
      Antibiotic
      Low-level detection
      Surface enhanced Raman scattering
      Antibiotics
      Gold
      Microspheres
      Nanomagnetics
      Nanoparticles
      Precipitation (chemical)
      Raman scattering
      Shells (structures)
      Silver
      Substrates
      Ag nanoparticle
      Amoxicillin
      Core-shell microspheres
      Core-shell nanoparticles
      Electrostatic attractions
      Level detections
      Surface enhanced Raman Scattering (SERS)
      Surface hydroxyl groups
      Surface scattering
      Permalink
      http://hdl.handle.net/11693/36806
      Published Version (Please cite this version)
      https://doi.org/10.1016/j.molstruc.2016.04.086
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      • Institute of Materials Science and Nanotechnology (UNAM) 1831
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