Humidity-Responsive Single-Nanoparticle-Layer Plasmonic Films

Jianlei Shen, Binquan Luan, Hao Pei, Zaixing Yang, Xiaolei Zuo, Gang Liu, Jiye Shi, Lihua Wang, Ruhong Zhou, Wenlong Cheng, Chunhai Fan

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12 Citations (Scopus)

Abstract

2D materials possess many interesting properties, and have shown great application potentials. In this work, the development of humidity-responsive, 2D plasmonic nanostructures with switchable chromogenic properties upon wetting-dewetting transitions is reported. By exploiting DNA hybridization-directed anchoring of gold nanoparticles (AuNPs) on substrates, a series of single-nanoparticle-layer (SNL) plasmonic films is fabricated. Due to the collective plasmonic responses in SNL, these ultrathin 2D films display rapid and reversible red-blue color change upon the wetting-dewetting transition, suggesting that hydration-induced microscopic plasmonic coupling between AuNPs is replicated in the macroscopic, centimeter-scale films. It is also found that hydration finely tunes the electric field distribution between AuNPs in the SNL film, based on which responsive surface-enhanced Raman scattering substrates with spatially homogeneous hot spots are developed. Thus it is expected that DNA-mediated 2D SNL structures open new avenues for designing miniaturized plasmonic nanodevices with various applications.

Original languageEnglish
Article number1606796
Number of pages6
JournalAdvanced Materials
Volume29
Issue number35
DOIs
Publication statusPublished - 20 Sep 2017

Keywords

  • Chromogenic films
  • DNA
  • Gold nanoparticles
  • Plasmon coupling
  • Single nanoparticle layers

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