Porous carbon films decorated with silver nanoparticles as a sensitive SERS substrate, and their application to virus identification

Surface-enhanced Raman spectroscopy (SERS) has advanced over the last four decades and has become an attractive tool for highly sensitive analysis in fields such as medicine and environmental monitoring. Recently, there has been an urgent demand for reusable and long-lived SERS substrates as a means of reducing the costs associated with this technique To this end, we fabricated a SERS substrate comprising a silicon nanowire array coated with silver nanoparticles, using metal-assisted chemical etching followed by photonic reduction. The morphology and growth mechanism of the SERS substrate were carefully examined and the performance of the fabricated SERS substrate was tested using rhodamine 6G and dopamine hydrochloride. The data show that this new substrate provides an enhancement factor of nearly 1 × 108. This work demonstrates that a silicon nanowire array coated with silver nanoparticles is sensitive and sufficiently robust to allow repeated reuse. These results suggest that this newly developed technique could allow SERS to be used in many commercial applications.

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Design of Aligned Porous Carbon Films with Single‐Atom Co–N–C Sites for High‐Current‐Density Hydrogen Generation

Advanced Materials ◽

10.1002/adma.202103533 ◽

2021 ◽

pp. 2103533

Author(s):

Rui Liu ◽

Zhichao Gong ◽

Jianbin Liu ◽

Juncai Dong ◽

Jiangwen Liao ◽

...

Keyword(s):

Current Density ◽

Porous Carbon ◽

Hydrogen Generation ◽

High Current Density ◽

Carbon Films ◽

Single Atom ◽

High Current

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Free-standing graphene-based porous carbon films with three-dimensional hierarchical architecture for advanced flexible Li–sulfur batteries

Journal of Materials Chemistry A ◽

10.1039/c5ta00343a ◽

2015 ◽

Vol 3 (18) ◽

pp. 9438-9445 ◽

Cited By ~ 41

Author(s):

Chao Wu ◽

Lijun Fu ◽

Joachim Maier ◽

Yan Yu

Keyword(s):

Porous Carbon ◽

Three Dimensional ◽

Carbon Films ◽

Hierarchical Architecture ◽

Free Standing ◽

Hierarchically Porous

A novel free-standing cathode film consisting of hierarchically porous carbon-encapsulated sulfur has been designed and fabricated for Li–sulfur batteries.

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In-Situ Grown Silver Nanoparticles on Nonwoven Fabrics Based on Mussel-Inspired Polydopamine for Highly Sensitive SERS Carbaryl Pesticides Detection

Nanomaterials ◽

10.3390/nano9030384 ◽

2019 ◽

Vol 9 (3) ◽

pp. 384 ◽

Cited By ~ 13

Author(s):

Zhiliang Zhang ◽

Tiantian Si ◽

Jun Liu ◽

Guowei Zhou

Keyword(s):

Silver Nanoparticles ◽

Collection Efficiency ◽

High Sensitivity ◽

Sers Substrate ◽

Analytical Sensitivity ◽

Sers Substrates ◽

Rapid Sampling ◽

Highly Sensitive ◽

Highly Sensitive Detection

The rapid sampling and efficient collection of target molecules from a real-world surface is fairly crucial for surface-enhanced Raman scattering (SERS) to detect trace pesticide residues in the environment and in agriculture fields. In this work, a versatile approach was exploited to fabricate a flexible SERS substrate for highly sensitive detection of carbaryl pesticides, using in-situ grown silver nanoparticles (AgNPs)on non-woven (NW) fabric surfaces based on mussel-inspired polydopamine (PDA) molecules. The obtained NW@PDA@AgNPs fabrics showed extremely sensitive and reproducible SERS signals toward crystal violet (CV) molecules, and the detection limit was as low as 1.0 × 10−12 M. More importantly, these NW@PDA@AgNPs fabrics could be directly utilized as flexible SERS substrates for the rapid extraction and detection of trace carbaryl pesticides from various fruit surfaces through a simple swabbing approach. It was identified that the detection limits of carbaryl residues from apple, orange, and banana surfaces were approximately decreased to 4.02 × 10−12, 6.04 × 10−12, and 5.03 × 10−12 g, respectively, demonstrating high sensitivity and superior reliability. These flexible substrates could not only drastically increase the collection efficiency from multifarious irregular-shaped matrices, but also greatly enhance analytical sensitivity and reliability for carbaryl pesticides. The fabricated flexible and multifunctional SERS substrates would have great potential to trace pesticide residue detection in the environment and bioscience fields.

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Nanocrystalline cellulose as reducing- and stabilizing agent in the synthesis of silver nanoparticles: Application as a surface-enhanced Raman scattering (SERS) substrate

Surfaces and Interfaces ◽

10.1016/j.surfin.2018.06.004 ◽

2018 ◽

Vol 13 ◽

pp. 1-10 ◽

Cited By ~ 15

Author(s):

Segun A. Ogundare ◽

Werner E. van Zyl

Keyword(s):

Silver Nanoparticles ◽

Raman Scattering ◽

Surface Enhanced Raman Scattering ◽

Nanocrystalline Cellulose ◽

Sers Substrate ◽

Stabilizing Agent ◽

Surface Enhanced ◽

Surface Enhanced Raman ◽

Enhanced Raman Scattering

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Nanoporous gold decorated with silver nanoparticles as large area efficient SERS substrate

Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XV ◽

10.1117/12.2273947 ◽

2017 ◽

Author(s):

Denis Garoli ◽

Eugenio Calandrini ◽

Paolo Ponzellini ◽

Matteo Ardini ◽

Sandro Cattarin ◽

...

Keyword(s):

Silver Nanoparticles ◽

Nanoporous Gold ◽

Sers Substrate ◽

Large Area ◽

Area Efficient

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Porous carbon nanowire array for surface-enhanced Raman spectroscopy

Nature Communications ◽

10.1038/s41467-020-18590-7 ◽

2020 ◽

Vol 11 (1) ◽

Cited By ~ 2

Author(s):

Nan Chen ◽

Ting-Hui Xiao ◽

Zhenyi Luo ◽

Yasutaka Kitahama ◽

Kotaro Hiramatsu ◽

...

Keyword(s):

Raman Spectroscopy ◽

Porous Carbon ◽

Hot Spots ◽

Strong Dependence ◽

Nanowire Array ◽

Surface Enhanced Raman Spectroscopy ◽

Localized Surface Plasmon ◽

Sers Substrate ◽

Surface Enhanced ◽

Surface Enhanced Raman

Abstract Surface-enhanced Raman spectroscopy (SERS) is a powerful tool for vibrational spectroscopy as it provides several orders of magnitude higher sensitivity than inherently weak spontaneous Raman scattering by exciting localized surface plasmon resonance (LSPR) on metal substrates. However, SERS can be unreliable for biomedical use since it sacrifices reproducibility, uniformity, biocompatibility, and durability due to its strong dependence on “hot spots”, large photothermal heat generation, and easy oxidization. Here, we demonstrate the design, fabrication, and use of a metal-free (i.e., LSPR-free), topologically tailored nanostructure composed of porous carbon nanowires in an array as a SERS substrate to overcome all these problems. Specifically, it offers not only high signal enhancement (~106) due to its strong broadband charge-transfer resonance, but also extraordinarily high reproducibility due to the absence of hot spots, high durability due to no oxidization, and high compatibility to biomolecules due to its fluorescence quenching capability.

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