One-step synthesis of gold nanoparticles for catalysis and SERS applications using selectively dicarboxylated cellulose and hyaluronate

Vávrová, Alžběta; Čapková, Tereza; Kuřitka, Ivo; Vı́cha, Jan; Münster, Lukáš

doi:10.1016/j.ijbiomac.2022.03.043

Cited by 10 publications

(9 citation statements)

References 49 publications

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“…UV-Vis spectroscopy is a valuable tool for monitoring the localized surface plasmon resonance (LSPR) peak, which corresponds to metallic NPs. 40,50–52 Reportedly, AuNPs showed their characteristic LSPR peak in the range of 500–600 nm according to the nanoparticle size. 40 In this work, the LSPR peak of the biosynthesized red gum-AuNPs appeared at 530 nm (Fig.…”

Section: Resultsmentioning

confidence: 98%

“…40,50–52 Reportedly, AuNPs showed their characteristic LSPR peak in the range of 500–600 nm according to the nanoparticle size. 40 In this work, the LSPR peak of the biosynthesized red gum-AuNPs appeared at 530 nm (Fig. 3A).…”

Section: Resultsmentioning

confidence: 98%

“…39 The synthesis of AuNPs using biological reducing and capping agents has gained much interest. 40 Plants are considered a potential source of reducing and capping compounds such as flavonoids, ascorbic acid, terpenes, and reductases. 41 Plant materials including leaves, fruits, roots, or the whole plant could be used in the synthesis of AuNPs.…”

Section: Introductionmentioning

confidence: 99%

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Red gum-capped gold nanoparticles for electrochemical sensing of bromocresol purple in water

Zahran,

Azzem,

El-Attar

2024

Mater. Adv.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Red gum-capped gold nanoparticles for electrochemical sensing of bromocresol purple in water

Zahran,

Azzem,

El-Attar

2024

Mater. Adv.

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“…Within the glucose repeat units of cellulose, the C2–C3 bonds can be broken by periodate oxidation, forming 2,3-dialdehyde groups. − The resulting product is commonly referred to as dialdehyde cellulose (DAC), and the aldehyde groups can be further transformed into carboxylic groups, − primary alcohols, , or imine groups. ,− Imine groups are formed through the Schiff base reaction between the aldehyde groups on DACs and the amine groups on the other reactants. These imine groups and the resulting Schiff base can also be reduced to new amines. ,,,,, Cystamine has been used to cross-link DAC materials by forming Schiff bases with the two amino groups on its two ends. ,− The resulting DAC hydrogels were demonstrated to be redox- and pH stimuli-responsive ,,, and have demonstrated self-healing abilities. , All the previous work focused on the properties of cysCNC hydrogels; however, research on the properties of dried cysCNC aerogels or the application of cysCNCs in Pickering emulsions is still lacking.…”

Section: Introductionmentioning

confidence: 99%

Self-Healing Composite Coating Fabricated with a Cystamine Cross-Linked Cellulose Nanocrystal-Stabilized Pickering Emulsion

Xu,

Onyianta,

Eloi

et al. 2024

Biomacromolecules

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A gelled Pickering emulsion system was fabricated by first stabilizing linseed oil droplets in water with dialdehyde cellulose nanocrystals (DACNCs) and then cross-linking with cystamine. Cross-linking of the DACNCs was shown to occur by a reaction between the amine groups on cystamine and the aldehyde groups on the CNCs, causing gelation of the nanocellulose suspension. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy were used to characterize the cystamine-cross-linked CNCs (cysCNCs), demonstrating their presence. Transmission electron microscopy images evidenced that cross-linking between cysCNCs took place. This cross-linking was utilized in a linseed oil-in-water Pickering emulsion system, creating a novel gelled Pickering emulsion system. The rheological properties of both DACNC suspensions and nanocellulose-stabilized Pickering emulsions were monitored during the cross-linking reaction. Dynamic light scattering and confocal laser scanning microscopy (CLSM) of the Pickering emulsion before gelling imaged CNC-stabilized oil droplets along with isolated CNC rods and CNC clusters, which had not been adsorbed to the oil droplet surfaces. Atomic force microscopy imaging of the air-dried gelled Pickering emulsion also demonstrated the presence of free CNCs alongside the oil droplets and the cross-linked CNC network directly at the oil–water interface on the oil droplet surfaces. Finally, these gelled Pickering emulsions were mixed with poly(vinyl alcohol) solutions and fabricated into self-healing composite coating systems. These self-healing composite coatings were then scratched and viewed under both an optical microscope and a scanning electron microscope before and after self-healing. The linseed oil was demonstrated to leak into the scratches, healing the gap automatically and giving a practical approach for a variety of potential applications.

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“…The applications of different forms of cellulose in SERS substrate for food safety detection have been explored. Vávrová et al (Vávrová et al, 2022) successfully prepared Au NPs using dicarboxylic cellulose (DCC) and hyaluronate (DCH) as reducing agent and end-capping reagent, and applied the Au NPs to detect the Raman signal of N-acetylcysteine (NAC). The enhanced effect was subjected to further improvement, which may be due to the presence of DCC and DCH hinder the contact of NAC with Au NPs.…”

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confidence: 99%

A xylan assisted surface-enhanced Raman scattering substrate for rapid food safety detection

Xiang

He²,

Li³

et al. 2022

Front. Bioeng. Biotechnol.

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Cellulose fiber/paper-based surface-enhanced Raman scattering (SERS) is considered as a promising food safety detection technology due to its non-toxicity, low cost, flexibility, and hygroscopicity for possible rapid on-site agricultural product contaminant detection. However, it faces the problems of poor noble metal adhesion and toxic noble metal reducing agent. In this study, a natural macromolecule—xylan was used as both a reducing agent and a stabilizing agent to prepare stable Au-Ag bimetal nanoparticles, which were anchored on the paper surface by xylans in order to fabricate a paper-based Au-Ag bimetallic SERS substrate. The results show that the SERS substrate has a high Raman enhancement performance and reproductively. The substrate can effectively detect trace pesticide, i.e., thiram, and the limit of detection is as low as 1 × 10–6 mol/L (0.24 ppm). In addition, the paper-based SERS substrate can be used for direct detection of pesticide residues on the surface of fruit. The paper-based SERS substrate developed in this study has great potential in applications for rapid food safety detection.

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One-step synthesis of gold nanoparticles for catalysis and SERS applications using selectively dicarboxylated cellulose and hyaluronate

Cited by 10 publications

References 49 publications

Red gum-capped gold nanoparticles for electrochemical sensing of bromocresol purple in water

Red gum-capped gold nanoparticles for electrochemical sensing of bromocresol purple in water

Self-Healing Composite Coating Fabricated with a Cystamine Cross-Linked Cellulose Nanocrystal-Stabilized Pickering Emulsion

A xylan assisted surface-enhanced Raman scattering substrate for rapid food safety detection

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