Abstract
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.
Highlights
In the field of nanotechnology, physical properties, as well as the use of metal nanoparticles, are interesting areas
platinum nanoparticles (Pt-NPs) were prepared inside the Graphene oxide (GO) aqueous solution (Pt-NPs/GO) using the laser ablation methods
The transmission electron microscopy (TEM) images show the Pt-NPs formed in the solution contained the GO which surrounded the Pt-NPs and they were distributed in the solution
Summary
In the field of nanotechnology, physical properties, as well as the use of metal nanoparticles, are interesting areas. The investigation of optical, thermal properties and formation of Pt-NPs in carbon-based nanomaterial solution is significant. Carboxyl (–COO−) and hydroxyl (OH−) groups are the major functional groups of GO More so, their interaction with other nanomaterial and molecular material like gold, silver, copper and zinc oxides is excellent [30]. The optical linear, nonlinear and thermal properties of nanomaterials are interesting subjects that can be used to evaluate nanomaterials and nanocomposites. The linear and nonlinear refractive indices and thermal properties of nanocomposites are the most significant parameters in nanophotonic. The UV-visible spectroscopy, Z-scan technique, spatial self-phase modulation (SSPM), thermal lens, and photoacoustic methods are some of the standard, versatile and commonly used methods of investigating the optical linear, nonlinear and thermal properties of nanomaterials. Pt-NPs were prepared inside the GO aqueous solution (Pt-NPs/GO) using the laser ablation methods. The nonlinear property of Pt-NPs/GO nanocomposite was investigated using Z-scan and SSPM pattern, whereas the thermal properties were investigated using thermal lens and photoacoustic methods to measure the thermal diffusivity, and thermal effusivity of prepared samples, respectively
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