Header menu link for other important links
X
Luminescent, freestanding composite films of Au 15 for specific metal ion sensing
Thalappil Pradeep, Shibu E.S, Maliyekkal S.M, Bootharaju M.S, Pradeep T.
Published in
2012
PMID: 22211455
Volume: 4
   
Issue: 2
Pages: 639 - 644
Abstract
A highly luminescent freestanding film composed of the quantum cluster, Au 15, was prepared. We studied the utility of the material for specific metal ion detection. The sensitivity of the red emission of the cluster in the composite to Cu 2+ has been used to make a freestanding metal ion sensor, similar to pH paper. The luminescence of the film was stable when exposed to several other metal ions such as Hg 2+, As 3+, and As 5+. The composite film exhibited visual sensitivity to Cu 2+ up to 1 ppm, which is below the permissible limit (1.3 ppm) in drinking water set by the U.S. environmental protection agency (EPA). The specificity of the film for Cu 2+ sensing may be due to the reduction of Cu 2+ to Cu 1+/Cu 0 by the glutathione ligand or the Au 15 core. Extended stability of the luminescence of the film makes it useful for practical applications. © 2012 American Chemical Society.
About the journal
JournalACS Applied Materials and Interfaces
ISSN19448244
Open AccessNo
Concepts (29)
  •  related image
    Composite
  •  related image
    Freestanding films
  •  related image
    Glutathiones
  •  related image
    LUMINESCENT FILMS
  •  related image
    METAL ION DETECTION
  •  related image
    Metal ion sensing
  •  related image
    METAL ION SENSORS
  •  related image
    QUANTUM CLUSTERS
  •  related image
    RED EMISSIONS
  •  related image
    SPECIFIC METAL ION SENSING
  •  related image
    U.S. ENVIRONMENTAL PROTECTION AGENCY
  •  related image
    VISUAL SENSITIVITY
  •  related image
    Chitosan
  •  related image
    Composite films
  •  related image
    Gold
  •  related image
    Luminescence
  •  related image
    Metal ions
  •  related image
    Copper
  •  related image
    Arsenic
  •  related image
    Glutathione
  •  related image
    Mercury
  •  related image
    Metal
  •  related image
    Article
  •  related image
    Chemistry
  •  related image
    Quantum theory
  •  related image
    Water pollutant
  •  related image
    LUMINESCENT MEASUREMENTS
  •  related image
    Metals
  •  related image
    Water pollutants, chemical