scholarly journals Preparation of Graphene Oxide Stabilized Nickel Nanoparticles with Thermal Effusivity Properties by Laser Ablation Method

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Amir Reza Sadrolhosseini ◽  
A. S. M. Noor ◽  
Kamyar Shameli ◽  
Alireza Kharazmi ◽  
N. M. Huang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Laser Ablation ◽  
Nickel Nanoparticles ◽  
Volume Fraction ◽  
Thermal Effusivity ◽  
Photoacoustic Technique ◽  
Oxide Composite ◽  
Nickel Nanoparticle ◽  
Laser Ablation Method ◽  
Nanoparticle Sizes

Nickel nanoparticles were dispersed uniformly in a graphene oxide solution, using a laser ablation technique with different ablation times that ranged from 5 to 20 minutes. The results indicate that the nickel nanoparticle sizes inside the graphene oxide decreased, and the volume fraction for the nickel nanoparticles in the graphene oxide increased with an increasing ablation time. Further, using Fourier Transform Infrared Spectroscopy, the nickel nanoparticles in the graphene oxide demonstrate greater stability from possible agglomeration when the nanoparticle was capped with oxygen from the carboxyl group of the graphene oxide. The thermal effusivity of the graphene oxide and nickel nanoparticle graphene oxide composite was measured using a photoacoustic technique. The concentration of graphene oxide shifted from 0.05 mg/L to 2 mg/L, and the thermal effusivity increased from 0.153 W·s1/2·cm−2·K−1to 0.326 W·s1/2·cm−2·K−1. In addition, the thermal effusivity of the nickel nanoparticles graphene oxide composite increased with an increase in the volume fraction of nickel nanoparticles from 0.1612 W·s1/2·cm−2·K−1to 0.228 W·s1/2·cm−2·K−1.

Liquid exfoliation of graphene oxide nanoribbons using chemical assisted laser ablation

2021 ◽  
pp. 2140009
Author(s):  
Siddhant Dhongade ◽  
Pankaj Koinkar ◽  
Akihiro Furube ◽  
Satoshi Sugano
Keyword(s):  
Graphene Oxide ◽  
Laser Ablation ◽  
2D Materials ◽  
Visible Spectroscopy ◽  
Liquid Exfoliation ◽  
Graphene Oxide Nanoribbons ◽  
Laser Ablation Method ◽  
Structural Details ◽  
Uv Visible ◽  
Optical Applications

The interest toward two-dimensional (2D) materials is gradually increasing because of their structure at nanoscale and great importance for electronic and optical applications. In this study, we show the synthesis of graphene oxide (GO) micro-ribbons fabricated by chemical assisted-laser ablation method. In order to confirm the formation of GO, UV-visible spectroscopy (UV-vis) and Raman spectroscopy are used to observe the surface morphological feature and structural details. In addition, a possible mechanism for the growth of GO nanoribbon is discussed. This work indicates a new method to develop GO nanostructures and related nanomaterials.

scholarly journals Green Fabrication of Copper Nanoparticles Dispersed in Walnut Oil Using Laser Ablation Technique

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Amir Reza Sadrolhosseini ◽  
Suraya Abdul Rashid ◽  
Azmi Zakaria ◽  
Kamyar Shameli
Keyword(s):  
Particle Size ◽  
Laser Ablation ◽  
Copper Nanoparticles ◽  
Volume Fraction ◽  
Spherical Shape ◽  
Copper Plate ◽  
Refractive Indices ◽  
Walnut Oil ◽  
Laser Ablation Method ◽  
Environmentally Sensitive

Synthesis of copper nanoparticles was achieved by laser irradiation of copper plate in walnut oil. The copper plate was irradiated using Nd:YAG pulse laser at different ablation time from 5 to 50 minutes, and the prepared samples were characterized using analytical methods to find the optical absorption, morphology, particle size, and capping of copper nanoparticles with walnut oil. Consequently, the absorption peak appeared at about 615, 606, 588, 576, and 561 nm; and the nanoparticles formed in spherical shape in walnut oil. The particle size varied from 25 to 4.01 nm, and the tail of the carbonyl band capped the copper nanoparticles through the electron transfer from the carboxylic group to copper nanoparticles. The refractive indices of the nanofluid were measured using a surface plasmon resonance technique and changed from 1.4691 + 0.008i to 1.4682 + 0.043i as the volume fraction increased from 0.0257 × 10−5to 1.26 × 10−5. Consequently, the laser ablation method is environmentally sensitive (i.e., green) and thus is suitable for the fabrication of copper nanoparticles in walnut oil without any agent.

scholarly journals Evaluating the Antibacterial Activity of AgGO Nanocomposite Against Clinical Isolate Bacteria

2019 ◽  
Vol 54 (6) ◽  
Author(s):  
Marwah Al-Ogaidi ◽  
Israa Al-Ogaidi
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Graphene Oxide ◽  
Laser Ablation ◽  
Silver Nanoparticle ◽  
Pathogenic Bacteria ◽  
Fourier Transforms ◽  
Gram Positive Bacteria ◽  
Laser Ablation Method ◽  
Fast Synthesis

This study discusses the synthesis, characterization, and activity of silver nanoparticles, along with silver graphene oxide, against pathogenic bacteria. Silver nanoparticles are prepared by laser ablation and fabricated with silver graphene oxide. The synthesized silver nanoparticles and silver graphene oxide were characterized through UV-Vis spectrophotometer, Fourier-transforms spectroscopy, and zeta potential. The antimicrobial performance of silver nanoparticles and silver graphene oxide nanoparticles were monitored by the contradiction of gram-negative bacteria (Escherichia.coli and Acenetobacter bumannii), and gram positive bacteria: Staphylococcus aureus. Different concentrations of silver and silver graphene oxide have been investigated to monitor their antibacterial activity against bacterial isolates. The results indicate that the nanocomposites have antibacterial activity and the antibacterial effect increases with increased concentration of nanocomposites. Laser ablation method, a fast synthesis technique, has been used in the current study to prepare silver nanoparticle and silver nanoparticle-graphene oxide nanocomposites.

scholarly journals Optical and Thermal Properties of Laser-Ablated Platinum Nanoparticles Graphene Oxide Composite

2019 ◽  
Vol 20 (24) ◽  
pp. 6153 ◽  
Author(s):  
Amir Reza Sadrolhosseini ◽  
Mina Habibiasr ◽  
Suhaidi Shafie ◽  
Hassan Solaimani ◽  
Hong Ngee Lim
Keyword(s):  
Graphene Oxide ◽  
Thermal Properties ◽  
Thermal Diffusivity ◽  
Thermal Lens ◽  
Platinum Nanoparticles ◽  
Volume Fraction ◽  
Thermal Effusivity ◽  
Visible Spectrum ◽  
Spherical Shape ◽  
Uv Visible

Platinum nanoparticles were synthesized in graphene oxide aqueous solution using a laser ablation technique to investigate the effect of optical linear, nonlinear and thermal properties of platinum-graphene oxide nanocomposite solution. The samples were prepared with different ablation times. The platinum nanoparticles that formed a spherical shape on the surface of graphene oxide solution were authenticated using UV-visible spectrum and transmission electron microscopy patterns. The particle size decreased with increasing ablation time, and the concentration and volume fraction of samples were increased. To obtain the optical linear, nonlinear and thermal properties of platinum-graphene oxide nanocomposite solution, UV-visible spectroscopy, Z-scan, thermal lens and photoacoustic techniques were used. Consequently, the linear and nonlinear refractive indices increased with an increase in the volume fraction of platinum nanoparticles. It was observed from the spatial self-phase modulation patterns that, the optical nonlinear property of the graphene oxide was enhanced in the presence of platinum nanoparticles, and the nonlinearity increased with an increase in the volume fraction of platinum nanoparticles inside the graphene oxide solution. The thermal diffusivity and thermal effusivity of platinum nanoparticles graphene oxide were measured using a thermal lens and photoacoustic methods, respectively. The thermal diffusivity and thermal effusivity of samples were in the range of 0.0341 × 10−5 m2/s to 0.1223 × 10−5 m2/s and 0.163 W s1/2 cm−2 K−1 to 0.3192 W s1/2 cm−2 K−1, respectively. Consequently, the platinum enhanced the optical and thermal properties of graphene oxide.

Synergistic effect of ceria on the structure and hydrogen evolution activity of nickel nanoparticles grown on reduced graphene oxide

2017 ◽  
Vol 5 (17) ◽  
pp. 8108-8116 ◽  
Author(s):  
Mohammad Zhiani ◽  
Saeedeh Kamali
Keyword(s):  
Graphene Oxide ◽  
Synergistic Effect ◽  
Reduced Graphene Oxide ◽  
Hydrogen Evolution ◽  
Nickel Nanoparticles ◽  
Chemical Reduction ◽  
Reduction Procedure ◽  
Oxide Composite ◽  
Reduced Graphene

A facile chemical reduction procedure for the synthesis of nickel nanoparticles on a ceria–reduced graphene oxide composite (ceria–rGO) was reported and the rule of the ceria in HER was discussed.

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