Role of temperature on colloidal behavior of gold nanoparticles dispersed in organic and aqueous media

Bashah, Nur Alwani Ali; Awel, E.; Amri, Nurulhuda; Alrozi, Rasyidah; Yaakob, Najmiddin; Zubir, Nor Aida; Osman, Mohamed Syazwan

doi:10.1063/1.5002475

Cited by 1 publication

(3 citation statements)

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“…The zeta potential for the as-prepared colloids was determined at 29 ± 3 mV, which indicates that the nanoparticles are stable in the solution [ 46 ]. Figure 1 a shows the NP hydrodynamic size distribution by their number and indicates that shorter irradiation time allows the creation of smaller nanoparticles (ca.…”

Section: Resultsmentioning

confidence: 99%

“…Over time, however, only nanoparticles bigger than 25 nm are present. This is due to the laser-induced heating of the solution, which substantially lowers zeta potential during modification, increases Brownian motion, and therefore promotes agglomeration of the nanoparticles [ 10 , 46 , 47 ]. Figure 1 b shows the volume-weighted size distribution of the particles in the colloid.…”

Section: Resultsmentioning

confidence: 99%

“…The analysis of the zeta potential and size distribution of the nanoparticles was investigated via dynamic light scattering technique, and the appropriate results are presented in Figure 1. The zeta potential for the as-prepared colloids was determined at 29 ± 3 mV, which indicates that the nanoparticles are stable in the solution [46]. Figure 1a shows the NP hydrodynamic size distribution by their number and indicates that shorter irradiation time allows the creation of smaller nanoparticles (ca.…”

Section: Colloid Characterisationmentioning

confidence: 97%

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Laser-Assisted Synthesis and Oxygen Generation of Nickel Nanoparticles

et al. 2020

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Nowadays, more than ever, environmental awareness is being taken into account when it comes to the design of novel materials. Herein, the pathway to the creation of a colloid of spherical, almost purely metallic nickel nanoparticles (NPs) through pulsed laser ablation in ethanol is presented. A complex description of the colloid is provided through UV-vis spectroscopy and dynamic light scattering analysis, ensuring insight into laser-induced nanoparticle homogenization and size-control of the NPs. The transmission electron spectroscopy revealed spherical nanoparticles with a narrow size distribution, whereas the energy-dispersive X-ray spectroscopy accompanied by the X-ray photoelectron spectroscopy revealed their metallic nature. Furthermore, an example of the application of the colloidal nanoparticles is presented, where a quick, five-min ultrasound modification results in over an order of magnitude higher current densities in the titania-based electrode for the oxygen evolution reaction.

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Section: Resultsmentioning

confidence: 99%