Gold nanoparticles size distribution by pulsed laser varying the wavelength

Abstract

In this work the influence of the wavelength variation of a pulsed laser on the size distribution of gold nanoparticles, synthesized by laser ablation in liquid medium, was determined, since this technique is the most used due to its simplicity as it is not developed under strict conditions of temperature, pressure, agitation, etc. Three different wavelengths were used: (i) 532 nm, (ii) 355 nm and (iii) 266 nm, due to equipment restrictions. The distributions and sizes of nanoparticles were studied by dynamic light scattering, scanning electron microscopy and atomic force microscopy. In addition, it is shown that the spectra of the gold region determine the chemical state of the nanoparticle. The results showed that the smallest particle size was obtained with the wavelength of 266 nm with a size of 9.6 nm, while for the other wavelengths; sizes of 55.4 nm and 77.3 nm were obtained respectively. Thus, smallest average diameter of gold nanoparticles was obtained with smallest wavelength.

Low Concentrations of Gold Nanoparticles as Electric Charge Carriers in Piezoelectric Cement-Based Materials

“…Therefore, based on the previous statements, we tried to produce gold nanoparticles with a spherical morphology and size under 1000 nm, so that these Au NPs were incrusted inside the micropores produced by the characteristic hydration process, which takes place in the cement matrix, as well as diminishing the adverse effects on the mechanical properties on the cement-based composite [32]. In this sense, the concentrations used were the consequence of searching for the best conditions to produce gold nanoparticles of low sizes and proper geometry, as reported previously by Arevalo and coauthors [33].…”

Boosting the efficiency of organic solar cells via plasmonic gold nanoparticles and thiol functionalized conjugated polymer

“…4a. The sample has Au 4f 7/2 peak at 84.15 eV and Au 4f 5/2 peak at 87.65 eV [45]. For the copper side, the sample presents the peaks at 932.2 eV and 951.9 eV for Cu 2p 3/2 and Cu 2p 1/2, respectively.…”

Nanogold Foundry Involving High‐Shear‐Mediated Photocontact Electrification in Water

“…XPS spectra is shown in Figure 5c, revealing two peaks for 4f gold with the binding energy for elemental old, at 84.22 and 87 eV, which is in good agreement with the binding energy for gold in the literature. [39][40][41]…”