Coating Noble Metal Nanocrystals (Ag, Au, Pd, and Pt) on Polystyrene Spheres via Ultrasound Irradiation

Vg, Pol; Grisaru, Haviv; Gedanken, Aharon

doi:10.1021/la047465d

Cited by 163 publications

(100 citation statements)

References 19 publications

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“…Gedanken and coworkers reported sonochemical deposition of in-situ generated noble metal nanoparticles on various substrates (e.g., silica, carbon, or polymer). [105][106][107] This sonochemical process significantly reduces the reaction time, achieving uniform coating of nanoparticles on substrates. Also, noble metal nanoparticles can be easily anchored on various substrates without tailoring surface properties (e.g., attaching thiols to the surface of a substrate) via this procedure.…”

Section: Nanostructured Materials Via Sonochemical Depositionmentioning

confidence: 99%

Applications of Ultrasound to the Synthesis of Nanostructured Materials

2010

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Recent advances in nanostructured materials have been led by the development of new synthetic methods that provide control over size, morphology, and nano/microstructure. The utilization of high intensity ultrasound offers a facile, versatile synthetic tool for nanostructured materials that are often unavailable by conventional methods. The primary physical phenomena associated with ultrasound that are relevant to materials synthesis are cavitation and nebulization. Acoustic cavitation (the formation, growth, and implosive collapse of bubbles in a liquid) creates extreme conditions inside the collapsing bubble and serves as the origin of most sonochemical phenomena in liquids or liquid-solid slurries. Nebulization (the creation of mist from ultrasound passing through a liquid and impinging on a liquid-gas interface) is the basis for ultrasonic spray pyrolysis (USP) with subsequent reactions occurring in the heated droplets of the mist. In both cases, we have examples of phase-separated attoliter microreactors: for sonochemistry, it is a hot gas inside bubbles isolated from one another in a liquid, while for USP it is hot droplets isolated from one another in a gas. Cavitation-induced sonochemistry provides a unique interaction between energy and matter, with hot spots inside the bubbles of approximately 5000 K, pressures of approximately 1000 bar, heating and cooling rates of >10(10) K s(-1); these extraordinary conditions permit access to a range of chemical reaction space normally not accessible, which allows for the synthesis of a wide variety of unusual nanostructured materials. Complementary to cavitational chemistry, the microdroplet reactors created by USP facilitate the formation of a wide range of nanocomposites. In this review, we summarize the fundamental principles of both synthetic methods and recent development in the applications of ultrasound in nanostructured materials synthesis.

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Section: Nanostructured Materials Via Sonochemical Depositionmentioning

confidence: 99%

Applications of Ultrasound to the Synthesis of Nanostructured Materials

2010

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“…16,24 Current research extends this method to include polymeric protein fibers. The chemical reactions, driven by intense ultrasonic waves, lead to the formation of nanoparticles.…”

Section: Xpsmentioning

confidence: 99%

Sonochemical deposition of silver nanoparticles on wool fibers

Hadad

Perkas

Gofer

et al. 2007

J of Applied Polymer Sci

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Silver nanoparticles were deposited on the surface of natural wool with the aid of powered ultrasound. The average particle size was 5-10 nm, but larger aggregates of 50-100 nm were also observed. The sonochemical irradiation of a slurry containing wool fibers, silver nitrate, and ammonia in an aqueous medium for 120 min under an argon atmosphere yielded a silver-wool nanocomposite. By varying the gas and reaction conditions, we could achieve control over the deposition of the metallic silver particles on the surface of the wool fibers. The resulting silver-deposited wool samples were characterized with X-ray diffraction, transmission electron microscopy, high-resolution transmission electron microscopy, high-resolution scanning electron microscopy, electron-dispersive X-ray analysis, Brunauer, Emmett, and Teller physical adsorption method, X-ray photoelectron spectroscopy, and Raman and diffused reflection optical spectroscopy. The results showed that the strong adhesion of the silver to the wool was a result of the adsorption and interaction of silver with sulfur moieties related to the cysteine group.

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“…However, it is a challenge to synthesize MNPs with high dispersion and small particle size because particles suffer from the drawback of agglomeration, which causes undesirable changes to their properties and restricts their applications (Moritz and Geszke-Moritz 2013). There are many traditional synthetic routes to formation of MNPs including chemical treatment (Sun and Xia 2002;Kumar 2007;Sondi et al 2003), irradiation (Henglein and Giersig 1999;Yin et al 2004;Abid et al 2002;Pol et al 2005), thermal treatment (Navaladian et al 2007), and photochemical (Huang et al 1996), or radiolytic reduction (Krklješ et al 2007). Many of these methods are time consuming and require the usage of additional chemicals such as sodium borohydride (NaBH 4 ) as reducing agent and polyvinyl pyrrolidine (PVP) as stabilizer or protecting agent, which can affect the surface properties of nanoparticles and diminish the overall performance of the material.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and immobilization of silver nanoparticles on aluminosilicate nanotubes and their antibacterial properties

et al. 2015

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A novel colloidal method is presented to synthesize silver nanoparticles on aluminosilicate nanotubes. The technique involves decomposition of AgNO 3 solution to Ag nanoparticles in the presence of aluminosilicate nanotubes at room temperature without utilizing of reducing agents or any organic additives. Aluminosilicate nanotubes are shown to be capable of providing a unique chemical environment, not only for in situ conversion of Ag ? into Ag 0 , but also for stabilization and immobilization of Ag nanoparticles. The synthesis strategy described here could be implemented to obtain self-assembled nanoparticles on other single-walled metal oxide nanotubes for unique applications. Finally, we demonstrated that nanotube/nanoparticle hybrid show strong antibacterial activity toward Gram-positive Staphylococcus epidermidis and Gram-negative Escherichia coli.

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Coating Noble Metal Nanocrystals (Ag, Au, Pd, and Pt) on Polystyrene Spheres via Ultrasound Irradiation

Cited by 163 publications

References 19 publications

Applications of Ultrasound to the Synthesis of Nanostructured Materials

Applications of Ultrasound to the Synthesis of Nanostructured Materials

Sonochemical deposition of silver nanoparticles on wool fibers

Synthesis and immobilization of silver nanoparticles on aluminosilicate nanotubes and their antibacterial properties

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