Hybrid Nanostructured Composites for Environmental and Bio-Sensing Application

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

Deadline for manuscript submissions: 15 June 2024 | Viewed by 659

Special Issue Editor


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Guest Editor
International Iberian Nanotechnology Laboratory-INL, Braga, Portugal
Interests: plasmonic nanomaterials; organic–inorganic hybrid composites; surface-enhanced vibrational spectroscopies; surface science; sensing and remediation applications
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Special Issue Information

Dear Colleagues,

You are cordially invited to submit an original research manuscript to this Special Issue of Nanomaterials entitled “Hybrid Nanostructured Materials for Environmental and Bio-Sensing Application”.

This Special Issue aims to highlight the highly interdisciplinary character of the selective sensing of (bio)molecules (e.g., pollutants and biomarkers), heavy metals, and ions as well as inorganic nanoparticles and micro/nanoplastics in environmental and biological matrices using multifunctional hybrid nanostructured composites. These hybrid composites (e.g., hybrid magnetic, organic-metal composites, etc.) enable the combination and enhance the specific properties of each component for sensing applications. This major research area involves chemistry, biology, engineering, and material science.

This Special Issue is focused on hybrid composites in which one of the components is a noble metal nanoparticle, especially gold and silver, which exhibit unique and tunable plasmonic properties as a function of their size, shape, and dielectric layer. This allows for their utilization as sensors based on colorimetric assays, surface-enhanced vibrational spectroscopies (e.g., SEF, SERS, SERRS), and Rayleigh scattering spectroscopies (e.g., dark-field), among others. Finally, the Special Issue is also focused on the combination of different nanostructures that provide specific properties (e.g., magnetic, electric, plasmonic, and mechanical), which opens up the possibility of the enhancement of flexible handling and efficient analytical capabilities of these hybrid nanomaterials.

Dr. Laura Rodriguez-Lorenzo
Guest Editor

Manuscript Submission Information

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Keywords

  • plasmonic nanoparticles
  • metal oxides
  • hybrid composites
  • colorimetric assays
  • SERS
  • heavy metals
  • biomarkers
  • pollutants

Published Papers (1 paper)

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Research

11 pages, 2938 KiB  
Communication
Ultrahigh-Q Polarization-Independent Terahertz Metamaterial Absorber Using Pattern-Free Graphene for Sensing Applications
by Youxin Chen, Guotao Sun, Jiang Wei, Yan Miao, Wenqian Zhang, Kaiyu Wu and Qingkang Wang
Nanomaterials 2024, 14(7), 605; https://doi.org/10.3390/nano14070605 - 29 Mar 2024
Viewed by 514
Abstract
In contrast to noble metals, graphene exhibits significantly lower loss, especially useful for optical sensing applications that require ultrahigh Q factors, and offer wide range tunability via an adjustable Fermi level. However, precise graphene patterning is difficult, especially for large areas, severely limiting [...] Read more.
In contrast to noble metals, graphene exhibits significantly lower loss, especially useful for optical sensing applications that require ultrahigh Q factors, and offer wide range tunability via an adjustable Fermi level. However, precise graphene patterning is difficult, especially for large areas, severely limiting its applications. Here, a tunable terahertz metamaterial absorber (TMMA) with ultrahigh Q factors consisting of a continuous, pattern-free graphene is demonstrated. A graphene sheet is overlaid on an Al metal array, forming a structure that supports strong localized surface plasmon polaritons (LSPPs) with fields tightly confined in the graphene, minimizing loss. Theoretical results show that this TMMA exhibits an ultrahigh Q factor of 1730, a frequency sensitivity of 2.84 THz/RIU, and an excellent figure of merit (FoM) of 365.85 RIU−1, independent of polarization. A tunability from ~2.25 to ~3.25 THz is also achieved by tuning Ef of graphene from 0.3 to 0.7 eV. The proposed graphene-based TMMA holds many potential applications, particularly in the field of sensing. Full article
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