Shape-Controlled Synthesis of Silver and Palladium Nanoparticles Using β-Cyclodextrin

Kochkar, Hafedh; Aouine, M.; Ghorbel, Abdelhamid; Berhault, Gilles

doi:10.1021/jp200662j

Cited by 68 publications

(56 citation statements)

References 85 publications

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“…Owing to hydroxyl groups, PVA polymer has the ability to reduce Ag salts into Ag-NP 13 , however, with the addition of HP␤CD in the PVA solution significant decrease was observed for the size of Ag-NP due to the highly efficient stabilizing and reducing properties of CD molecules (Kochkar et al, 2011;Ng et al, 2008). Furthermore, Ag-NP did not aggregate or coagulate locally due to the stabilizing effect of HP␤CD that leads to uniform distribution of Ag-NP within the fiber matrix.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, CD are used in a number of industrial areas such as pharmaceuticals, food, chromatography, cosmetics and textiles (Chung, Guo, Priestley, & Kwak, 2011;Harada, Kobayashi, Takashima, Hashidzume, & Yamaguchi, 2010;Hedges, 1998;Szejtli, 1998). In addition to that, being a non-toxic and naturally occurring material, CD are also very promising candidates for use as reducing and stabilizing agent for the formation of metal NP (Alvarez, Liu, Román, & Kaifer, 2000;Huang, Meng, & Qi, 2009;Kochkar, Aouine, Ghorbel, & Berhault, 2011;Liu et al, 2012;Ng et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

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One-step synthesis of size-tunable Ag nanoparticles incorporated in electrospun PVA/cyclodextrin nanofibers

Çelebioğlu

Aytaç

Umu

et al. 2014

Carbohydrate Polymers

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a b s t r a c tOne-step synthesis of size-tunable silver nanoparticles (Ag-NP) incorporated into electrospun nanofibers was achieved. Initially, in situ reduction of silver salt (AgNO 3 ) to Ag-NP was carried out in aqueous solution of polyvinyl alcohol (PVA). Here, PVA was used as reducing agent and stabilizing polymer as well as electrospinning polymeric matrix for the fabrication of PVA/Ag-NP nanofibers. Afterwards, hydroxypropyl-beta-cyclodextrin (HP␤CD) was used as an additional reducing and stabilizing agent in order to control size and uniform dispersion of Ag-NP. The size of Ag-NP was ∼8 nm and some Ag-NP aggregates were observed for PVA/Ag-NP nanofibers, conversely, the size of Ag-NP decreased from ∼8 nm down to ∼2 nm within the fiber matrix without aggregation were attained for PVA/HP␤CD nanofibers. The PVA/Ag-NP and PVA/HP␤CD/Ag-NP nanofibers exhibited surface enhanced Raman scattering (SERS) effect. Moreover, antibacterial properties of PVA/Ag-NP and PVA/HP␤CD/Ag-NP nanofibrous mats were tested against Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus) bacteria.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

One-step synthesis of size-tunable Ag nanoparticles incorporated in electrospun PVA/cyclodextrin nanofibers

Çelebioğlu

Aytaç

Umu

et al. 2014

Carbohydrate Polymers

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“…In most of the reported works, thio-modified β-CD (such as per-6-deoxy-(6-thio)-β-CD) was used because of the weak modifying efficiency of natural β-CD onto the surface of the metal structure. In our earlier work, we proposed an in situ reduction strategy to synthesize β-CD modified Ag nanoparticles by making use of the reducing activity of the natural β-CD under heat and alkaline condition [43,44]. The obtained substrate was successfully applied to detection of sulfonamide antibiotics with the LOD as low as 10 ng mL −1 [45].…”

Section: Host-guest Interactionmentioning

confidence: 99%

Precision Target Guide Strategy for Applying SERS into Environmental Monitoring

Ouyang¹,

Li²,

Zhu³

et al. 2017

Raman Spectroscopy and Applications

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Surface enhanced Raman spectroscopy (SERS) is a promising analytical technique that exhibits various applications in trace detection and identification. When it is applied into environmental monitoring, we should concern several key points to improve detection sensitivity and selectivity for the detection in complex matrix. In this tutorial review, we mainly focus on the strategies for improving the use of SERS into environmental application. The strategies are summarized for enhancing the ability of the substrate to selectively capture specific targets, and for achieving separation and concentration of the analytes from the matrix and the assembly structures for multiple phase detection. We have also introduced several newly developed detection systems using portable instruments and miniaturized devices that are more suitable for infield applications. In addition, we discuss the present challenges that hide it from wide real application and give the outlook for the future development in applying SERS in environmental monitoring.

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“…The optimization of the catalyst preparation pointed out that the best molar ratio CD/metal to get the highest activity and stereochemistry toward the transisomer was equal to 3. Shape-controlled palladium nanoparticles with initially citrate-capped seeds were synthesized in the presence of b-CD [48]. Multipods or nanodendrites made by the assembly of the primary NPs could be formed.…”

Section: Adsorption Of Cd-stabilized Nps Onto Porous Materialsmentioning

confidence: 99%

Cyclodextrins as Multitask Agents in Nanocatalysis

Noël¹,

Léger²,

Ponchel³

et al. 2015

Handbook of Nanoparticles

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The efficiency of colloidal metallic particles in catalysis is closely related to their stability in the course of reaction. The choice of the capping agent is therefore critical as it controls both the size and shape of the particles, but also the dispersion of the metal core, while providing long-term stability. Among the wide variety of protective agents, cyclodextrins (cyclic oligosaccharides formed of glucopyranose units) have proven to be effective for synthesizing metallic nanoparticles by bottom-up chemical processes. The first examples in the literature emphasize the use of native cyclodextrins as metal nanoparticles (NPs) stabilizers but major improvements concerning the stability and catalytic activity of NPs either in the form of colloidal suspensions or immobilized onto supports were done by using chemically modified cyclodextrins. Indeed, appropriate functionalizations can lead to beneficial effects in the cyclodextrin affinity toward metal species and mass transfer of the substrate during the catalytic processes. It clearly appears that cyclodextrins can act as multitask agents from the formation (growth and nucleation process) of metal nanoparticles to the catalytic activity enhancement via specific interactions with the substrate. They can also be used to form supramolecular adducts with inorganic metal salts leading to heterogeneous catalysts with a homogeneous particles dispersion onto the support.

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Shape-Controlled Synthesis of Silver and Palladium Nanoparticles Using β-Cyclodextrin

Cited by 68 publications

References 85 publications

One-step synthesis of size-tunable Ag nanoparticles incorporated in electrospun PVA/cyclodextrin nanofibers

One-step synthesis of size-tunable Ag nanoparticles incorporated in electrospun PVA/cyclodextrin nanofibers

Precision Target Guide Strategy for Applying SERS into Environmental Monitoring

Cyclodextrins as Multitask Agents in Nanocatalysis

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