Tunable surface plasmon resonance frequencies of monodisperse indium tin oxide nanoparticles by controlling composition, size, and morphology

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• 作者：Keke Ma (3) (4)
  Ning Zhou (3) (4)
  Meng Yuan (3) (4)
  Dongsheng Li (3) (4)
  Deren Yang (3)
  
  3. State Key Laboratory of Silicon Materials and Department of Materials Science and Engineering ; Zhejiang University ; Hangzhou ; 310027 ; People鈥檚 Republic of China
  4. Cyrus Tang Center for Sensor Materials and Applications ; Zhejiang University ; Hangzhou ; 310027 ; People鈥檚 Republic of China
  
• 关键词：Indium tin oxide nanoparticles ; Doping ; Surface plasmon resonance ; Size
• 刊名：Nanoscale Research Letters
• 出版年：2014
• 出版时间：December 2014
• 年：2014
• 卷：9
• 期：1
• 全文大小：1,379 KB
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• 刊物主题：Nanotechnology; Nanotechnology and Microengineering; Nanoscale Science and Technology; Nanochemistry; Molecular Medicine;
• 出版者：Springer US
• ISSN：1556-276X

文摘

Monodisperse indium tin oxide nanoparticles (ITO NPs) with high crystallinity have been synthesized by the rapid thermal injection method and the seed-mediated growth method. We demonstrate that the surface plasmon resonance (SPR) frequencies of ITO NPs can be manipulated from 1,600 to 1,993 nm in near-infrared band by controlling the composition, size, and morphology. The doping Sn concentration in ITO NPs could be controlled via changing the %Sn in the initial feed from 0% to 30%. The shortest SPR wavelength at 1,600 nm with 10% Sn doping concentration indicates highest free electron carrier concentration in ITO NPs, which has direct relationship with doping Sn4+ ions. Furthermore, we demonstrate that the SPR peaks can also be tuned by the size of ITO NPs in the case of uniform doping. Besides, compared with the ITO NPs, single crystalline ITO with nanoflower morphology synthesized through the one-pot method exhibit SPR absorption peak features of red-shifting and broadening.