Fabrication of flexible, cost-effective, and scalable silver substrates for efficient surface enhanced Raman spectroscopy based trace detection

Khan, Ghazanfar Ali; Demirtaş, Özge; Demir, Ahmet; Aytekin, O.; Bek, Alpan; Bhatti, Arshad Saleem; Ahmed, Waqqar

doi:10.1016/j.colsurfa.2021.126542

Cited by 21 publications

(8 citation statements)

References 55 publications

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“…Therefore, the substrate has shown excellent reusability. This could be because silver NPs have excellent binding with the cotton substrate which has abundant hydroxyl groups [1,53] . This strong adhesion minimizes silver NPs leaching into the solution thus preserving their catalytic activity over multiple catalytic cycles.…”

Section: Resultsmentioning

confidence: 99%

“…Silver NPs have diverse applications spanning multiple industries, including sensors, catalysis, and antibacterial agents. [1][2][3][4][5] Their versatility arises from their inherent cost-effectiveness, remarkable SERS activity, and excellent catalytic and antibacterial properties. The traditional method for synthesizing silver NPs is the wet chemical synthesis in solution, which provides a reliable means of controlling NPs size and distribution.…”

Section: Introductionmentioning

confidence: 99%

“…Silver NPs have diverse applications spanning multiple industries, including sensors, catalysis, and antibacterial agents [1–5] . Their versatility arises from their inherent cost‐effectiveness, remarkable SERS activity, and excellent catalytic and antibacterial properties.…”

Section: Introductionmentioning

confidence: 99%

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Controlled Growth of Silver Nanoparticles on Cotton Substrate for Enhanced SERS, Catalytic, and Antibacterial Performance

Batool,

Khan,

Shafique

et al. 2024

ChemistrySelect

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In this study, we report the growth of surfactant‐free silver nanoparticles (NPs) on cotton through a facile chemical reduction method, iteratively applied to gradually increase and control the concentration of silver NPs. Our substrates showed enhanced performance in surface enhanced Raman spectroscopy (SERS), catalytic, and antibacterial properties, all attributable to the high concentration of NPs on the cotton and their surfactant‐free nature. While the antibacterial properties improve with increasing growth cycles, SERS and catalytic properties first increase from the first to fourth growth cycles and then decrease for the fifth growth cycle. For substrate with optimum deposition for SERS, rhodamine 6G (R6G) analyte down to nanomolar concentrations were detectable, with a linear correlation of intensity versus concentration and exhibit excellent uniformity in the SERS signal. Furthermore, the catalytic activity of our substrates against the degradation of methyl orange (MO) was impressive with a rate constant of 0.0866 min−1 for the first growth cycle, which increased by ~3.4‐fold to 0.2979 min−1 for the fourth growth cycle. Finally, the substrates showed excellent antibacterial activity towards both Gram‐negative (E. coli) and Gram‐positive (S. aureus) bacteria. For both bacteria, the zone of inhibition increased with increasing growth cycles.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Controlled Growth of Silver Nanoparticles on Cotton Substrate for Enhanced SERS, Catalytic, and Antibacterial Performance

Batool,

Khan,

Shafique

et al. 2024

ChemistrySelect

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“…The ICP‐OES analysis of the dye solution obtained after first and third catalytic cycles showed an insignificant average leaching of Au (0.64 weight percent of the original Au loading on the FPGS) into the solution. This is due to the presence of abundant hydroxyl and carboxyl groups on filter paper, [43] which provide binding sites for the bottom part of the gold nanostructures. This ensures excellent adhesion of gold on the support.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Highly Catalytically Active Gold Nanostructures on Filter‐Paper and Their Applications towards Degradation of Environmental Pollutants

et al. 2021

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Supported metallic nanoparticles (NPs) have recently become a promising candidate for the degradation of environmental pollutants. In this work, we report the fabrication of highly catalytically active, surfactant-free interconnected Au nanostructures directly on filter paper. The width of nanostructures is only a few nanometers and they contain high concentration of low-coordination atoms. Our approach involves the immersion and evaporation of Au precursor solution on the filter paper and its subsequent reduction. This approach generates filter paper-based gold substrates (FPGS) not only in a simple and straightforward fashion that can be executed in a matter of minutes but can also be easily scaled up for large-scale production. Owing to their surfactant-free nature, FPGS are well suited for the degradation of both cationic and anionic dyes by providing large unhindered surface for dye adsorption. The FPGS were able to completely degrade methyl orange (MO) and methylene blue (MB) dyes and also showed excellent reusability and stability.

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“…Various materials, including cellulose fiber, paper, polymers, and cotton fabrics, have been used to create flexible SERS substrates. − In particular, cotton-swab-based substrates have been widely studied owing to their easy handling, strong fibers, and flexibility. Cheng et al synthesized flexible SERS substrates by isolating Ag@Au NPs on the surface of cotton fabrics to detect carbaryl insecticides on cucumber using a synthetic procedure that required approximately 2 days.…”

Section: Introductionmentioning

confidence: 99%

Au-NP-Decorated Cotton Swabs as a Facile SERS Substrate for Food-Safety-Related Molecule Detection

Rafiq

Wang

et al. 2023

ACS Omega

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Recently, food safety has received considerable attention, and various analytical techniques have been employed to monitor food quality. One of the promising techniques in this domain is the surface-enhanced Raman scattering (SERS) technique. This study developed a facile, cost-effective SERS method by supporting a wipe-type substrate with a small-head cotton swab. We fabricated Au-nanoparticle (NP)-decorated cotton swabs (CS-Au NP) via the dropwise addition of gold colloid on the cotton fibers. These swabs exhibit reduced gold colloid consumption and a compact fiber structure, allowing for the uniform distribution of Au NPs and easy capture of molecular signals. Experiments were conducted to obtain a CS-Au NP wiper performance optimized for cotton swab selection, NaCl concentration, and Au NP layers. The Raman reporter molecule 4-mercaptopyridine was detected at a concentration of 1 × 10–8 M and a relative standard deviation of ≤10%. The proposed SERS platform enables the facile and reliable detection of food-safety-related molecules such as malachite green on the surface of fruits and vegetables. This paper describes the development of an easy, cost-effective, and environment-friendly method of detecting food-safety-related molecules on various food surfaces through SERS.

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Fabrication of flexible, cost-effective, and scalable silver substrates for efficient surface enhanced Raman spectroscopy based trace detection

Cited by 21 publications

References 55 publications

Controlled Growth of Silver Nanoparticles on Cotton Substrate for Enhanced SERS, Catalytic, and Antibacterial Performance

Controlled Growth of Silver Nanoparticles on Cotton Substrate for Enhanced SERS, Catalytic, and Antibacterial Performance

Fabrication of Highly Catalytically Active Gold Nanostructures on Filter‐Paper and Their Applications towards Degradation of Environmental Pollutants

Au-NP-Decorated Cotton Swabs as a Facile SERS Substrate for Food-Safety-Related Molecule Detection

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