Header menu link for other important links
X
Functional hybrid nickel nanostructures as recyclable SERS substrates: Detection of explosives and biowarfare agents
Panikkanvalappil Ravindranathan Sajanlal,
Published in
2012
PMID: 22535435
Volume: 4
   
Issue: 11
Pages: 3427 - 3437
Abstract
We present the synthesis of highly anisotropic nickel nanowires (NWs) and large area, free-standing carpets extending over cm 2 area by simple solution phase chemistry. The materials can be post-synthetically manipulated to produce hybrid tubes, wires, and carpets by galvanic exchange reactions with Au 3+, Ag +, Pt 2+, and Pd 2+. All of these structures, especially the hybrid carpets and tubes, have been prepared in bulk and are surface enhanced Raman scattering (SERS) active substrates. Molecules of relevance such as dipicolinic acid (constituting 5-15% of the dry weight of bacterial spores of Bacillus anthracis), dinitrotoluene, hexahydro-1,3,5-triazine (RDX), and trinitrotoluene at nanomolar concentrations have been detected. An enhancement factor of ∼10 10 was observed for the Ni-Au nanocarpet. The reusability of the Ni-Au nanocarpet for SERS applications was tested 5 times without affecting the sensitivity. The reusability and sensitivity over large area have been demonstrated by Raman microscopy. Our method provides an easy and cost effective way to produce recyclable, large area, SERS active substrates with high sensitivity and reproducibility which can overcome the limitation of one-time use of traditional SERS substrates. © 2012 The Royal Society of Chemistry.
About the journal
JournalNanoscale
ISSN20403364
Open AccessNo
Concepts (49)
  •  related image
    ACTIVE SUBSTRATES
  •  related image
    BACILLUS ANTHRACIS
  •  related image
    BACTERIAL SPORE
  •  related image
    BIOWARFARES
  •  related image
    Cost effective
  •  related image
    Detection of explosives
  •  related image
    DINITROTOLUENES
  •  related image
    Dipicolinic acids
  •  related image
    DRY WEIGHT
  •  related image
    Enhancement factor
  •  related image
    GALVANIC EXCHANGE
  •  related image
    High sensitivity
  •  related image
    NANOMOLAR CONCENTRATION
  •  related image
    NICKEL NANOWIRES
  •  related image
    Raman microscopy
  •  related image
    Reproducibilities
  •  related image
    SERS SUBSTRATE
  •  related image
    SERS-ACTIVE SUBSTRATES
  •  related image
    SOLUTION-PHASE CHEMISTRY
  •  related image
    Surface enhanced raman scattering (sers)
  •  related image
    Explosives detection
  •  related image
    Hybrid materials
  •  related image
    Nanowires
  •  related image
    Organic acids
  •  related image
    Platinum
  •  related image
    Raman spectroscopy
  •  related image
    Reusability
  •  related image
    Tubes (components)
  •  related image
    Substrates
  •  related image
    Dipicolinic acid
  •  related image
    Explosive
  •  related image
    Nanowire
  •  related image
    Nickel
  •  related image
    Picolinic acid derivative
  •  related image
    Article
  •  related image
    BACILLUS ANTHRACIS
  •  related image
    BACTERIAL SPORE
  •  related image
    BIOLOGICAL WARFARE AGENT
  •  related image
    Chemistry
  •  related image
    Isolation and purification
  •  related image
    Physiology
  •  related image
    Raman spectrometry
  •  related image
    Ultrastructure
  •  related image
    BACILLUS ANTHRACIS
  •  related image
    BIOLOGICAL WARFARE AGENTS
  •  related image
    EXPLOSIVE AGENTS
  •  related image
    Picolinic acids
  •  related image
    Spectrum analysis, raman
  •  related image
    SPORES, BACTERIAL