Laser-Based Formation and Properties of Gold Nanoparticles in Aqueous Solution: Formation Kinetics and Surfactant-Modified Particle Size Distributions

Abstract

We report on the time evolution of gold nanoparticle (AuNP) optical properties and size distributions as a function of laser irradiation in pure water samples and at sodium dodecylsulphate (SDS) surfactant concentrations above and below the SDS critical micelle concentration in water. Our investigations provide a mechanistic insight into the laser-induced formation kinetics involved in AuNP production via 1064 nm laser irradiation in aqueous solution, as well as the relative stabilities of different AuNP size regimes. Following preparation via laser ablation at 1064 nm, we show that 532 nm laser irradiation in the absence of surfactant generates AuNP that are both small in size and possess a narrow particle size distribution. This distribution remains narrow and shifts to smaller average particle size with increasing surfactant concentration.

Laser-Based Formation of Copper Nanoparticles in Aqueous Solution: Optical Properties, Particle Size Distributions, and Formation Kinetics

“…[32] Copper Nanoparticle Formation The LASiS experimental method employed in our laboratory has been previously reported. [19][20][21] Only salient details are reported here. CuNPs were prepared in a manner similar to that reported by Haram and Ahmad, [33] either in ultrapure water (purified with a Merck Millipore Synergy UV water purification system; Millipore S.A.S, Molsheim, France) or in the presence of either 4,49Bipy or T-4Py at a concentration of 1 Â 10 À4 M. Laser ablation was performed for 60 min at 1064 nm using a Continuum Surelite II Nd:YAG laser operating at 10 Hz and 7.5 mJ pulse À1 .…”

“…[16][17][18] In recent years, the use of laser-based methods to produce a variety of metal nanoparticles has become increasingly common. [19][20][21][22][23][24] The laser-based preparation of copper nanoparticles (CuNPs) has received attention, [25][26][27] in part owing to the history of copper as a coinage metal. However, unlike, for example, the laser-based formation of gold [23] and platinum [24] nanoparticles, the susceptibility of CuNPs to surface oxidation both during and following their formation has made studies of CuNP chemistry more challenging.…”

“…Previous studies from our laboratory have involved the production of gold nanoparticles (AuNPs) encapsulated by anionic [19,21] and cationic [20] surfactants in aqueous solution. A motivation for the study is to explore the fundamental chemistry involved in CuNP production in the presence of N-donor ligands via the LASiS approach.…”

Detection of Aflatoxin B1 in Some Canned Foods and Reduction of Toxin by Ultraviolet Radiation

“…Laser ablation of target submerged in liquid environment which is simple method, recently has attracted much attention for NPs creation [1,2] The unique physical properties of Nano scale materials have shown to have abilities to develop wide array methods for cost-effective diagnosis, fast determination of resistance of antibacterial drugs, and efficient delivery of antimicrobial agents [3]. Among the different metallic NPs, Au NPs have wide range of applications in Nano scale devices and…”

Pulsed-Laser Ablation of Au Foil in Primary Alcohols Influenced by Direct Current

“…Procházka et al, 1997;Srnová et al, 1998;Šišková et al, 2008), surfactants (e.g. Fong et al, 2010), organic molecules (e.g. Darroudi et al, 2011;Kabashin et al, 2003;Mafune et al, 2002;Šišková et al, 2007, or even DNA (Takeda et al, 2005).…”