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Issue 29, 2017
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AuAg@CdS double-walled nanotubes: synthesis and nonlinear absorption properties

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Abstract

Novel AuAg@CdS double-walled nanotubes (DWNTs) were successfully fabricated through a three-step solvothermal method, starting with silver nanowires as the template. In the DWNTs, a uniform layer of a CdS shell is coated onto the AuAg nanotubes, finally forming the one-dimensional nanocomposites. Nonlinear optical analysis indicated that the plasmon–exciton interaction in the AuAg@CdS DWNTs induced an obviously saturated absorption response under visible light excitation, in contrast to individual AuAg nanotubes and CdS shells. Furthermore, the effective nonlinear absorption coefficient of the AuAg@CdS DWNTs was 7 times larger than that of the CdS shell, which was attributed to the local field enhancement effect. Such a unique morphological configuration and optical properties make AuAg@CdS DWNTs an ideal candidate for next generation nano-photonic devices employed as a mode-locking element, optical switch, and so on.

Graphical abstract: AuAg@CdS double-walled nanotubes: synthesis and nonlinear absorption properties

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Publication details

The article was received on 22 Apr 2017, accepted on 15 Jun 2017 and first published on 16 Jun 2017


Article type: Paper
DOI: 10.1039/C7NR02861J
Citation: Nanoscale, 2017,9, 10277-10284
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    AuAg@CdS double-walled nanotubes: synthesis and nonlinear absorption properties

    S. Guan, X. Fu, Y. Tang and Z. Peng, Nanoscale, 2017, 9, 10277
    DOI: 10.1039/C7NR02861J

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