Preparation of stable suspensions of gold nanoparticles in water by sonoelectrochemistry

• Published in: Ultrasonics sonochemistry Vol. 15; no. 6; pp. 1055 - 1061
• Main Authors: Aqil, A., Serwas, H., Delplancke, J.L., Jérôme, R., Jérôme, C., Canet, L.
• Format: Journal Article Web Resource
• Language: English
• Published: Amsterdam Elsevier B.V 01.09.2008; Elsevier; Elsevier Science
• Subjects: Borohydrides - chemistry; Chemistry; Chimie; Colloidal state and disperse state; Electrochemistry; Engineering, computing & technology; Exact sciences and technology; General and physical chemistry; Gold - chemistry; Ingénierie, informatique & technologie; Ligands; Materials science & engineering; metal nanoparticle; Nanoparticles; Nanoparticles - chemistry; nanostructured material; Oxidation-Reduction; Particle Size; Physical and chemical studies. Granulometry. Electrokinetic phenomena; Physical chemistry of induced reactions (with radiations, particles and ultrasonics); Physical, chemical, mathematical & earth Sciences; Physique, chimie, mathématiques & sciences de la terre; Polyethylene Glycols - chemistry; Povidone - chemistry; Science des matériaux & ingénierie; smart colloid; Solvents; Sonoelectrochemistry; Spectrophotometry, Ultraviolet; Suspensions; Ultrasonic chemistry; Ultrasonics; Water; Nanoparticles; Sonoelectrochemistry; Water; Gold; Sonochemistry; Sonoelectrochemistry;Nanoparticles; Nanoparticle; Preparation; Suspension; Transition metal; Ultrasound
• ISSN: 1350-4177; 1873-2828
• DOI: 10.1016/j.ultsonch.2008.04.004

Stable suspensions of gold nanoparticles in water were prepared with high yield by a novel one-step ultrasound assisted electrochemical process. Various strategies based on the addition of either tailor-made polymers or mixtures of commercially available polymers, in the electrochemical bath have been found successful to avoid nanoparticles aggregation commonly observed by sonoelectrochemistry. α-Methoxy-ω-mercapto-poly(ethylene oxide) or poly(vinyl pyrrolidone)/polyethylene oxide mixtures were able to build up a coalescence barrier around the gold nanoparticles. The results showed that the size of the gold nanoparticles could be easily tuned between 5 nm and 35 nm by simple control of the electrochemical parameters, i.e. the deposition time ( T ON) from 10 ms to 20 ms. The properties of as-prepared gold nanoparticles were compared to the ones of gold colloids prepared by the more conventional wet nanoprecipitation method using chemical reductive agents.