journal article·2020-02-28

Layered Assembly of Silver Nanocubes/Polyelectrolyte/Gold Film as an Efficient Substrate for Surface-Enhanced Raman Scattering

Qiang Wang, Xiuhui Bai, Yang Zhang, Ziang Zhou, Ming Guo, Jiatao Zhang, Chunhong Li, Changzheng Wang, Shaowei Chen

ACS Applied Nano Materials· Volume 3· Issue 2
Publisher page

Abstract

Surface-enhanced Raman scattering (SERS) is of great importance for the sensitive, rapid, and repeatable detection of target analytes. The electromagnetic enhancement has a major contribution to the signal enhancement in SERS which is critically dependent on the micro-/nanomorphology of noble metal (e.g., Au and Ag) film substrates. Herein, Ag nanocubes/polyelectrolyte/Au (Ag/PE/Au) sandwich-structured film is fabricated by the layer-by-layer deposition and then utilized as an efficient SERS substrate by the coupling of localized surface plasmons (LSPs) and surface plasmon polaritons (SPPs) resonances while the electromagnetic field enhancement is confined within the PE gap layer which is sandwiched between Ag nanocubes and Au film. With rhodamine 6G and crystal violet as the probe molecules, the Ag/PE/Au sandwich-structured film demonstrates highly sensitive SERS signals, which is further supported by the theoretical simulations as well. This work indicates that the Ag/PE/Au sandwich-structured film can be employed as a reliable SERS substrate for sensitive molecular sensing applications.
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Research context

OpenAlex topics: Gold and Silver Nanoparticles Synthesis and Applications · Plasmonic and Surface Plasmon Research · Nanocluster Synthesis and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Laboratory for Micro-sized Functional Materials, College of Elementary Education and Department of Chemistry, Capital Normal University, Beijing 100048, China

Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China

Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China

National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China

Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation, Beijing University of Civil Engineering and Architecture, Beijing 100044, China

Department of Chemistry and Biochemistry, University of California, Santa Cruz, Santa Cruz, California 95064, United States

Funding

Beijing Municipal Commission of Education · State Key Laboratory of Explosion Science and Technology · National Natural Science Foundation of China

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