Synthesis of Water-Soluble CuInS<sub>2</sub> Quantum Dots by a Hydrothermal Method and Their Optical Properties

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Abstract

<p>Water-soluble CuInS<sub>2</sub> (CIS) quantum dots (QDs) were hydrothermally prepared in the presence of <i>N</i>-acetyl-L-cysteine (NAC) as a stabilizer, and the optimal hydrothermal synthetic conditions for NAC-capped CIS QDs were investigated. The photoluminescence (PL) quantum yield (QY) of the CIS QDs synthesized under optimal conditions was 4%, which was comparable with the highest QY reported for water-soluble CIS core QDs. The introduction of a ZnS shell produced CIS/ZnS core/shell QDs and further increased the PL QY to 30%. Furthermore, bilayer structures consisting of Au nanoparticles and CIS/ZnS QDs were fabricated using a layer-by-layer method to enhance the PL of the CIS/ZnS QDs on the basis of the localized surface plasmon resonance of Au nanoparticles.</p>

Journal

  • Bulletin of the Chemical Society of Japan

    Bulletin of the Chemical Society of Japan 92(5), 930-936, 2019

    Chemical Society of Japan

Codes

  • NII Article ID (NAID)
    130007649751
  • NII NACSIS-CAT ID (NCID)
    AA12026255
  • Text Lang
    ENG
  • Article Type
    journal article
  • ISSN
    0009-2673
  • Data Source
    IR  J-STAGE 
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