X-ray radiolysis induced formation of silver nano-particles: A SAXS and UV–visible absorption spectroscopy study

Rémita, Samy; Fontaine, Philippe; Lacaze, Emmanuelle; Borensztein, Y.; Sellame, H.; Farha, Rana; Rochas, C.; Goldmann, Michel

doi:10.1016/j.nimb.2007.06.032

Cited by 57 publications

(48 citation statements)

References 17 publications

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“…A number of preparation methods have been described for the synthesis of metallic nanoparticles (Pal et al 2007a;Rosemary and Pradeep 2003); such as, reverse micelles process (Xie et al 2006;Maillard et al 2002), salt reduction (Pillai and Kamat 2004), microwave dielectric heating reduction (Patel et al 2005), ultrasonic irradiation (Salkar et al 1999), radiolysis (Karim et al 2007;Remita et al 2007), solvothermal synthesis (Starowicz et al 2006), electrochemical synthesis (Zhu et al 2001;Liu et al 2001) and biological techniques (Naik et al 2002). The most widespread method of synthesis of metallic nanoparticles is based on the chemical reduction of metal salt solution by a reducing agent (Szczepanowicz et al 2010).…”

Section: Introductionmentioning

confidence: 99%

A facile and rapid method for the black pepper leaf mediated green synthesis of silver nanoparticles and the antimicrobial study

2013

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Green synthesis of nanoparticles is widely accepted due to the less toxicity in comparison with chemical methods. But there are certain drawbacks like slow formation of nanoparticles, difficulty to control particle size and shape make them less convenient. Here we report a novel cost-effective and eco-friendly method for the rapid green synthesis of silver nanoparticles using leaf extracts of Piper nigrum. Our results suggest that this method can be used for obtaining silver nanoparticles with controllable size within a few minutes. The fabricated nanoparticles possessed excellent antibacterial property against both Gram-positive and Gram-negative bacteria.

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Section: Introductionmentioning

confidence: 99%

A facile and rapid method for the black pepper leaf mediated green synthesis of silver nanoparticles and the antimicrobial study

2013

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“…Despite all of these synthesis procedures, significant efforts are underway to explore alternative techniques intended to be used to synthesize new conjugated polymers. [16] g-Rays and X-rays are indeed very often used at ambient temperature and pressure to initiate, in the absence of any external chemical initiators, oxidation [17,18] or reduction [19,20] reactions through the control of the nature of the initiator radicals formed during water radiolysis; these radicals are dependent on the medium (atmosphere and solute). [15] We recently, and for the first time, used g-radiolysis as an original, simple alternative way to synthesize conjugated PEDOT polymers in solution.…”

Section: Introductionmentioning

confidence: 99%

Radiation‐Induced Synthesis of Nanostructured Conjugated Polymers in Aqueous Solution: Fundamental Effect of Oxidizing Species

et al. 2013

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Synthesis of conjugated poly(3,4-ethylenedioxythiophene) (PEDOT) polymers is achieved through the radiolysis of N2O-saturated aqueous solutions of 3,4-ethylenedioxythiophene by using two different oxidizing species: HO(·) (hydroxyl) and N3(·) (azide) radicals. Both oxidative species lead to self-assembled polymers that are evidenced in solution by cryotransmission electron microscopy and UV/Vis absorption spectroscopy and, after centrifugation and deposition, by scanning electron microscopy and attenuated total reflectance FTIR techniques. Whereas HO(·) radicals lead to PEDOT-OH globular nanostructures with hydrophilic properties, N3(·) radicals enable the formation of amphiphilic PEDOT-N3 fibrillar nanostructures. These results, which highlight the differences in the intermolecular interaction behaviors of the two kinds of PEDOT polymers, are discussed in terms of polymerization mechanisms.

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“…[3,4] Now, metal-nanoparticle synthesis is well established. [5,6] Electromagnetic radiation, [7][8][9][10][11] dimethylformamide (DMF), [12] ascorbate, [13][14][15] and citrate [16][17][18][19] are common reducing agents for silver salts. Ascorbate and citrate have become popular for their "green" connotation, but they also lead to uniform nanoparticles, [20] including nanorods, [21] core-shell structures, [22,23] and polyamine- [24] and polysulfonate-stabilized [14,25] nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Peptide‐Coated Silver Nanoparticles: Synthesis, Surface Chemistry, and pH‐Triggered, Reversible Assembly into Particle Assemblies

Graf

Mantion

Foelske

et al. 2009

Chemistry A European J

107

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Simple tripeptides are scaffolds for the synthesis and further assembly of peptide/silver nanoparticle composites. Herein, we further explore peptide-controlled silver nanoparticle assembly processes. Silver nanoparticles with a pH-responsive peptide coating have been synthesized by using a one-step precipitation/coating route. The nature of the peptide/silver interaction and the effect of the peptide on the formation of the silver particles have been studied via UV/Vis, X-ray photoelectron, and surface-enhanced Raman spectroscopies as well as through electron microscopy, small angle X-ray scattering and powder X-ray diffraction with Rietveld refinement. The particles reversibly form aggregates of different sizes in aqueous solution. The state of aggregation can be controlled by the solution pH value. At low pH values, individual particles are present. At neutral pH values, small clusters form and at high pH values, large precipitates are observed.

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X-ray radiolysis induced formation of silver nano-particles: A SAXS and UV–visible absorption spectroscopy study

Cited by 57 publications

References 17 publications

A facile and rapid method for the black pepper leaf mediated green synthesis of silver nanoparticles and the antimicrobial study

A facile and rapid method for the black pepper leaf mediated green synthesis of silver nanoparticles and the antimicrobial study

Radiation‐Induced Synthesis of Nanostructured Conjugated Polymers in Aqueous Solution: Fundamental Effect of Oxidizing Species

Peptide‐Coated Silver Nanoparticles: Synthesis, Surface Chemistry, and pH‐Triggered, Reversible Assembly into Particle Assemblies

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