Applications of Metal Nanomaterials in Detection and Spectral Analysis

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanophotonics Materials and Devices".

Deadline for manuscript submissions: closed (15 November 2022) | Viewed by 2201

Special Issue Editor


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Guest Editor
School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Interests: Raman-THz spectroscopy; single molecule detection; design and preparation of nano-structured plasmonic materials; optical sensors for biological and environmental applications

Special Issue Information

Dear Colleagues,

Nanomaterials have excellent performances in catalysis, optics, electricity, magnetism, chemistry and superconduction due to their special properties, such as their interfacial, quantum size and macroscopic quantum tunneling effects. Metal nanomaterials with excellent plasmonic properties have been widely used in spectrum technology for chemical analysis and molecular detection.

Plasmonic-based spectroscopy is a promising technique to probe and identify molecules and chemicals. Amplified by plasmonic nanostructured metals, the signal intensity of a target can be dramatically improved. Surface-Enhanced Raman Scattering (SERS) can be dramatically improved by a factor of up to 10 orders of magnitude with nanostructured metals that possess electromagnetic “hot spots” at the sharp edges and nanogaps between nearby metals. Accordingly, it becomes possible to detect and distinguish the spectroscopic signature of a single molecule by SERS, and developing a novel metal nanostructure with a high density of “hot spots” has been a recent topic of intense discussion. Additionally, surface plasmon enhancement has been used in fluorescence, infrared and THz spectroscopy, and demonstrates high potential for trace detection applications.

We invite researchers to contribute original and review articles regarding the metal nanomaterials. Potential topics include, but are not limited to, the following: synthesis, modification, and functionalization of metal nanomaterials; application of metal nanomaterials as light concentrators, plasmonic substrates, optical sensors and signal amplifiers; in vitro and in vivo spectroscopy studies of chemicals and molecules with metal nanomaterials.

Prof. Dr. Ling Zhang
Guest Editor

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Keywords

  • nanomaterials
  • plasmonics
  • metal
  • sensing
  • enhancement
  • spectroscopy
  • imaging
  • functionalization
  • analysis
  • raman

Published Papers (2 papers)

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Research

8 pages, 1275 KiB  
Article
Surface Defects Improved SERS Activity of Nanoporous Gold Prepared by Electrochemical Dealloying
by Ling Zhang, Zhiyu Jing, Zhexiao Li and Takeshi Fujita
Nanomaterials 2023, 13(1), 187; https://doi.org/10.3390/nano13010187 - 31 Dec 2022
Cited by 3 | Viewed by 1489
Abstract
Nanoporous metals possess excellent catalytic and optical properties that are related with surface morphology. Here, we modulated the ligament surface of nanoporous gold (NPG) by controlling electrochemical dealloying and obtained NPG with an improved enhancement of its surface-enhanced Raman scattering (SERS) property. We [...] Read more.
Nanoporous metals possess excellent catalytic and optical properties that are related with surface morphology. Here, we modulated the ligament surface of nanoporous gold (NPG) by controlling electrochemical dealloying and obtained NPG with an improved enhancement of its surface-enhanced Raman scattering (SERS) property. We found that both high-density atomic steps and kinks on the curved surfaces and high-content silver atoms close to the ligament surface contributed to the high SERS ability. The presented strategy will be useful for the fabrication of nanoporous metal with an excellent surface that is needed for sensing, conversion, and catalytic. Full article
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10 pages, 2311 KiB  
Article
Carbon-Assistant Nanoporous Gold for Surface-Enhanced Raman Scattering
by Zhiyu Jing, Ling Zhang, Xiaofei Xu, Shengli Zhu and Heping Zeng
Nanomaterials 2022, 12(9), 1455; https://doi.org/10.3390/nano12091455 - 25 Apr 2022
Cited by 3 | Viewed by 1581
Abstract
Surface-enhanced Raman scattering (SERS) technology can amplify the Raman signal due to excited localized surface plasmon (LSP) from SERS substrates, and the properties of the substrate play a decisive role for SERS sensing. Several methods have been developed to improve the performance of [...] Read more.
Surface-enhanced Raman scattering (SERS) technology can amplify the Raman signal due to excited localized surface plasmon (LSP) from SERS substrates, and the properties of the substrate play a decisive role for SERS sensing. Several methods have been developed to improve the performance of the substrate by surface modification. Here, we reported a surface modification method to construct carbon-coated nanoporous gold (C@NPG) SERS substrate. With surface carbon-assistant, the SERS ability of nanoporous gold (NPG) seriously improved, and the detection limit of the dye molecule (crystal violet) can reach 10−13 M. Additionally, the existence of carbon can avoid the deformation of the adsorbed molecule caused by direct contact with the NPG. The method that was used to improve the SERS ability of the NPG can be expanded to other metal structures, which is a convenient way to approach a high-performance SERS substrate. Full article
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