In situ hydrazine reduced silver colloid synthesis – Enhancing SERS reproducibility

Dugandžić, Vera; Hidi, Izabella J.; Weber, Karina; Cialla‐May, Dana; Popp, Jürgen

doi:10.1016/j.aca.2016.10.018

Cited by 30 publications

(18 citation statements)

References 36 publications

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“…In order to achieve controllable and reproducible synthesis conditions, the strategy already described by Dugandžić et al [47] was employed within this study. A segmented flow microfluidic chip illustrated in Figure S1 in the Supplementary Information (SI) was used for both nanoparticle synthesis and SERS measurements in the same time.…”

Section: In Situ Synthesized Nanoparticles-y-agnpsmentioning

confidence: 99%

“…However, the required sodium hydroxide would react with the hydrophobic silane layer on the glass surface of the microfluidic chip and at the same time inhibit the successful creation of droplets as well as the nanoparticles. As an alternative method, hydrazine can be used as reduction agent in the presence of a low amount of citrate to synthesize y-AgNPs in the applied microfluidic chip device [47].…”

Section: Optimization Of the Sers Measurement Conditionsmentioning

confidence: 99%

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Molecular Specific and Sensitive Detection of Pyrazinamide and Its Metabolite Pyrazinoic Acid by Means of Surface Enhanced Raman Spectroscopy Employing In Situ Prepared Colloids

et al. 2019

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The prodrug pyrazinamide (PZA) is metabolized by the mycobacteria to pyrazinoic acid (POA), which is expelled into the extracellular environment. PZA resistance is highly associated to a lack of POA efflux. Thus, by detecting a reduction of the concentration of POA in the extracellular environment, by means of lab-on-a-chip (LoC)-SERS (surface-enhanced Raman spectroscopy), an alternative approach for the discrimination of PZA resistant mycobacteria is introduced. A droplet-based microfluidic SERS device has been employed to illustrate the potential of the LoC-SERS method for the discrimination of PZA resistant mycobacteria. The two analytes were detected discretely in aqueous solution with a limit of detection of 27 µm for PZA and 21 µm for POA. The simultaneous detection of PZA and POA in aqueous mixtures could be realized within a concentration range from 20 μm to 50 μm for PZA and from 50 μm to 80 μm for POA.

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Section: In Situ Synthesized Nanoparticles-y-agnpsmentioning

confidence: 99%

Section: Optimization Of the Sers Measurement Conditionsmentioning

confidence: 99%

Molecular Specific and Sensitive Detection of Pyrazinamide and Its Metabolite Pyrazinoic Acid by Means of Surface Enhanced Raman Spectroscopy Employing In Situ Prepared Colloids

et al. 2019

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“…These techniques are usually accompanied by the addition of stabilizers to provide stability, prevent aggregation, control morphology, and provide physiologically compatible properties [140][141][142]. Chemical methods were previously used to produce silver nanoparticles including sol-gel processes [143][144][145][146], conventional chemical reduction [147][148][149][150][151], reverse micelle [152][153][154], co-precipitation [155], chemical vapor deposition [156][157][158], solvothermal [159][160][161], and electrochemical reduction [162][163][164][165]. Chemical synthesis methods are currently among the most widely used approaches [104,166].…”

Section: Review 1 Introductionmentioning

confidence: 99%

“…Nevertheless, other essential factors such as cost-effectiveness, eco-friendliness, energy consumption, and human well-being can easily be overlooked. For instance, hydrazine, as a strong and common reductant [205][206][207] for the synthesis of AgNPs [149,[208][209][210][211] is a highly toxic, cancerous, and lethal chemical [205]. Although some works have incorporated green synthesis techniques [111,112,135,164,212,213], they do not completely eliminate the need for chemicals, nor do they rule out high-energy consumption in physical synthesis methods, thereby increasing costs greatly [137,214].…”

Section: Review 1 Introductionmentioning

confidence: 99%

A review on the green and sustainable synthesis of silver nanoparticles and one-dimensional silver nanostructures

Kaabipour¹,

Hemmati²

2021

Beilstein J. Nanotechnol.

106

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The significance of silver nanostructures has been growing considerably, thanks to their ubiquitous presence in numerous applications, including but not limited to renewable energy, electronics, biosensors, wastewater treatment, medicine, and clinical equipment. The properties of silver nanostructures, such as size, size distribution, and morphology, are strongly dependent on synthesis process conditions such as the process type, equipment type, reagent type, precursor concentration, temperature, process duration, and pH. Physical and chemical methods have been among the most common methods to synthesize silver nanostructures; however, they possess substantial disadvantages and short-comings, especially compared to green synthesis methods. On the contrary, the number of green synthesis techniques has been increasing during the last decade and they have emerged as alternative routes towards facile and effective synthesis of silver nanostructures with different morphologies. In this review, we have initially outlined the most common and popular chemical and physical methodologies and reviewed their advantages and disadvantages. Green synthesis methodologies are then discussed in detail and their advantages over chemical and physical methods have been noted. Recent studies are then reviewed in detail and the effects of essential reaction parameters, such as temperature, pH, precursor, and reagent concentration, on silver nanostructure size and morphology are discussed. Also, green synthesis techniques used for the synthesis of one-dimensional (1D) silver nanostructures have been reviewed, and the potential of alternative green reagents for their synthesis has been discussed. Furthermore, current challenges regarding the green synthesis of 1D silver nanostructures and future direction are outlined. To sum up, we aim to show the real potential of green nanotechnology towards the synthesis of silver nanostructures with various morphologies (especially 1D ones) and the possibility of altering current techniques towards more environmentally friendly, more energy-efficient, less hazardous, simpler, and cheaper procedures.

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“…[6][7][8] Due to this, current research about SERS has focused on the design and fabrication of highly sensitive SERS substrates. [9][10][11][12][13][14] Metallic colloids were one of the most commonly used substrates mainly due to their ease of preparation. [15][16][17] However, the uncontrollable aggregation associated with metallic colloids makes the stability and reproducibility a major challenge in real applications.…”

Section: Introductionmentioning

confidence: 99%

In situ synthesis of low-cost and large-scale flexible metal nanoparticle–polymer composite films as highly sensitive SERS substrates for surface trace analysis

Zong

Pan

et al. 2019

RSC Adv.

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In situ synthesis of low-cost and large-scale flexible metal nanoparticle-polymer composite films as highly sensitive SERS substrates for surface trace analysis † Surface-enhanced Raman spectroscopy (SERS) has been one of the most promising analytical tools.Despite many efforts in the design of SERS substrates, it remains a great challenge for creating a general flexible substrate that could in situ detect analytes on diverse objects. Herein, we report our attempt to address this issue by developing a facile and versatile method capable of generating silver/gold nanoparticles in situ on the surface of a cellulose acetate (CA) polymer in a simple, cheap, practical, and capping agent-free way. The as-prepared substrates exhibit excellent sensitivity, which enabled detection of Rhodamine 6G at concentrations as low as 10 À12 M. Taking advantage of the excellent flexibility and optical transparency of the CA matrix, the highly SERS-active substrate was applied for in situ identification and detection of pesticide residues on fruits. The results indicated that tetramethylthiuram disulfide (TMTD) and thiabendazole (TBZ) can be clearly identified at concentrations as low as 18.05 ng cm À2 and 15.1 ng cm À2 , respectively, which were much lower than the maximum permitted residue doses with respect to food safety.View Article Online the TBZ (a) and TMTD (b) powder, and (c) the mixture of 5 Â 10 À5 M TMTD and TBZ on the apple peel.2862 | RSC Adv., 2019,9,[2857][2858][2859][2860][2861][2862][2863][2864] This journal is

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In situ hydrazine reduced silver colloid synthesis – Enhancing SERS reproducibility

Cited by 30 publications

References 36 publications

Molecular Specific and Sensitive Detection of Pyrazinamide and Its Metabolite Pyrazinoic Acid by Means of Surface Enhanced Raman Spectroscopy Employing In Situ Prepared Colloids

Molecular Specific and Sensitive Detection of Pyrazinamide and Its Metabolite Pyrazinoic Acid by Means of Surface Enhanced Raman Spectroscopy Employing In Situ Prepared Colloids

A review on the green and sustainable synthesis of silver nanoparticles and one-dimensional silver nanostructures

In situ synthesis of low-cost and large-scale flexible metal nanoparticle–polymer composite films as highly sensitive SERS substrates for surface trace analysis

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