Synthesis of silver nanocubes as a SERS substrate for the determination of pesticide paraoxon and thiram

In this chapter, we revise some of the most relevant and widely used synthetic routes available for the preparation of metallic silver nanoparticles. Particular emphasis has been focused in the rationale involved in the formation of the nanostructures, from the early metallic silver atoms formation, passing by atoms nucleation and concluding in the growth of silver nanostructures. We hope the reader will find in this chapter a valuable tool to better understand the relevance of the experimental conditions in the resulting silver nanoparticle size, shape and overall properties.

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“…Surface Enhanced Raman Spectroscopy (SERS) [3][4][5][6][7][8][9]. The optical properties of AgNP depend N.L.…”

Section: Introductionmentioning

confidence: 99%

Synthetic Routes for the Preparation of Silver Nanoparticles

Pacioni

Borsarelli

Rey

et al. 2015

Engineering Materials

115

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“…In previous reports, however, the noble metals were commonly used as SERS-active substrates for the detection of drug molecules, [19][20][21][22][23] and the research on semiconductor served as SERS substrate for detecting drug is very little. Wang et al 18 has claimed that the mesoporous silica coated gold NRs can be used as dual-mode image probes operating through both SERS and fluorescence signal.…”

Section: Introductionmentioning

confidence: 99%

SERS investigation of ciprofloxacin drug molecules on TiO₂ nanoparticles

Yang

Qin

Jiang

et al. 2015

Phys. Chem. Chem. Phys.

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In this paper, TiO2 nanoparticles (NPs) with different crystallinity served as SERS-active substrates for SERS detection of ciprofloxacin (CIP) drug molecules for the first time. CIP is close to the surface of the TiO2 substrate through the carboxyl group. The mutual SERS enhancement behaviors between CIP molecules and TiO2 NPs were discovered, which are attributed to the contribution of the TiO2-to-molecule charge-transfer mechanism. The crystallinity of TiO2 NPs, the pH value of adsorption solution and the adsorption time have significant influences on the interaction and the SERS behavior between CIP and TiO2. When the calcination temperature of TiO2 NPs is 450 °C, the pH value of adsorption solution is 6 and the adsorption time is 9 h, the CIP molecules on TiO2 NPs exhibit the largest SERS enhancement.

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“…The optimization in the sensitivity degree of SERS‐active nanostructures is typically focused on modifications in its shape, size, composition, and aggregation level. Different methods of preparation consider reducing agents such as sodium citrate, the irradiation with UV–Vis light, sodium borohydride (NaBH 4 ), formic acid, sodium citrate and NaBH4, butylamine, agarose, ascorbic acid, ethylene glycol, ammonia, polyvinyl(pyrrolidone)—PVP, sodium citrate, and ascorbic acid . Table summarizes different Ag‐based SERS systems and the influence of reducing agents on detection level of different pesticides.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…The agar film provides hydrophobicity to the filter paper that favors the formation of hot spots applied in the detection of chlorpyrifos . The use of ethylene glycol for production of AgNPs as nanocubes introduces stable and reliable signal for SERS detection of paraoxon . The AgNPs reduced by ammonia on the mesoporous SiO 2 microspheres formed small interparticle gaps and the hot spots were integrated into two hybrid structures, considered as excellent candidates for SERS substrates applied in the identification of methyl parathion at low concentration …”

Section: Theoretical Backgroundmentioning

confidence: 99%

Silver‐based surface enhanced Raman spectroscopy devices for detection of organophosphorus pesticides traces

Soares

2019

Biotechnology Progress

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The detection of traces of substances by surface‐sensitive techniques such as surface enhanced Raman spectroscopy (SERS) explores the interaction of adsorbed molecules on plasmonic surfaces to improve the limit of detection of analytes. This article is an overview about recent development in SERS substrates applied in the detection of organophosphorus pesticides on plasmonic surfaces (arrays of metal nanoparticles). The morphology, roughness, chemical functionalization degree, and aggregation level of plasmonic centers are some of the critical parameters to be controlled in the optimization of SERS signal from specific analytes.

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Synthesis of silver nanocubes as a SERS substrate for the determination of pesticide paraoxon and thiram

Cited by 91 publications

References 35 publications

Synthetic Routes for the Preparation of Silver Nanoparticles

Synthetic Routes for the Preparation of Silver Nanoparticles

SERS investigation of ciprofloxacin drug molecules on TiO₂ nanoparticles

Silver‐based surface enhanced Raman spectroscopy devices for detection of organophosphorus pesticides traces

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Synthesis of silver nanocubes as a SERS substrate for the determination of pesticide paraoxon and thiram

Cited by 91 publications

References 35 publications

Synthetic Routes for the Preparation of Silver Nanoparticles

Synthetic Routes for the Preparation of Silver Nanoparticles

SERS investigation of ciprofloxacin drug molecules on TiO2 nanoparticles

Silver‐based surface enhanced Raman spectroscopy devices for detection of organophosphorus pesticides traces

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Product

Resources

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SERS investigation of ciprofloxacin drug molecules on TiO₂ nanoparticles