Flexible plasmonic nanocavities: a universal platform for the identification of molecular orientations

Yao, Lei; Qi, Hao; Li, Mingze; Fan, Xingce; Li, Guoqun; Tang, Xiao; Wei, Yunjia; Wang, Jiawei; Qiu, Teng

doi:10.1039/d3nr01059g

Cited by 5 publications

(2 citation statements)

References 56 publications

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“…Generally, the Raman signal amplification of the target analyte depends on the material properties of SERS substrates. For example, noble metal SERS substrates based on an electromagnetic mechanism (EM) amplify the Raman signal via a unique localized surface plasmon resonance (LSPR) [13,14]. Fu et al utilized an ultrathin alumina membrane surface patterning technique to fabricate arrays of Ag nanoparticles, achieving an EM-based SERS enhancement factor of up to 10 9 [15].…”

Section: Introductionmentioning

confidence: 99%

ReS2 Nanoflowers-Assisted Confined Growth of Gold Nanoparticles for Ultrasensitive and Reliable SERS Sensing

Liao

et al. 2023

Molecules

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ReS2, as a new member of transition metal dichalcogenides (TMDCs), has emerged as a promising substrate for semiconductor surface-enhanced Raman spectroscopy (SERS) due to its unique optoelectronic properties. Nevertheless, the sensitivity of the ReS2 SERS substrate poses a significant challenge to its widespread application in trace detection. In this work, we present a reliable approach for constructing a novel ReS2/AuNPs SERS composite substrate, enabling ultrasensitive detection of trace amounts of organic pesticides. We demonstrate that the porous structures of ReS2 nanoflowers can effectively confine the growth of AuNPs. By precisely controlling the size and distribution of AuNPs, numerous efficient and densely packed “hot spots” were created on the surface of ReS2 nanoflowers. As a result of the synergistic enhancement of the chemical and electromagnetic mechanisms, the ReS2/AuNPs SERS substrate demonstrates high sensitivity, good reproducibility, and superior stability in detecting typical organic dyes such as rhodamine 6G and crystalline violet. The ReS2/AuNPs SERS substrate shows an ultralow detection limit of 10−10 M and a linear detection of organic pesticide molecules within 10−6–10−10 M, which is significantly lower than the EU Environmental Protection Agency regulation standards. The strategy of constructing ReS2/AuNPs composites would contribute to the development of highly sensitive and reliable SERS sensing platforms for food safety monitoring.

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Section: Introductionmentioning

confidence: 99%

ReS2 Nanoflowers-Assisted Confined Growth of Gold Nanoparticles for Ultrasensitive and Reliable SERS Sensing

Liao

et al. 2023

Molecules

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“…12,13 The excellent molecular specificity, high sensitivity, and rapid response capability of SERS make it an effective tool for analysing antibiotic residues in outdoor settings. 14,15 The enhancement of the Raman signal intensity in SERS is primarily achieved through the chemical mechanism (CM) and the electromagnetic mechanism (EM). [16][17][18] The EM enhancement plays a dominant role in the SERS effect.…”

mentioning

confidence: 99%

High-performance SERS chips for sensitive identification and detection of antibiotic residues with self-assembled hollow Ag octahedra

Tan,

Lou,

Zhu

2023

Chem. Commun.

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Nanopore/Nanocavity-Based Structures as Surface-Enhanced Raman Spectroscopy (SERS) Platforms

Heydaryan,

Aspoukeh,

Mehmandoust

et al. 2024

Plasmonics

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Flexible plasmonic nanocavities: a universal platform for the identification of molecular orientations

Abstract: Molecular orientation provides fundamental images to understand the molecular behaviors in chemistry. Herein, we propose and demonstrate sandwich plasmonic nanocavity as a surface-selection ruler to illustrate the molecular orientations by...

Cited by 5 publications

References 56 publications

ReS2 Nanoflowers-Assisted Confined Growth of Gold Nanoparticles for Ultrasensitive and Reliable SERS Sensing

ReS2 Nanoflowers-Assisted Confined Growth of Gold Nanoparticles for Ultrasensitive and Reliable SERS Sensing

High-performance SERS chips for sensitive identification and detection of antibiotic residues with self-assembled hollow Ag octahedra

Nanopore/Nanocavity-Based Structures as Surface-Enhanced Raman Spectroscopy (SERS) Platforms

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