In this work,By using the laser ablation technique(PLAL)to fabricate novel PMMA/G/Ag nanocomposites with less laser energy and short time ablation and study the structural,morphological and optical properties.The X-ra...In this work,By using the laser ablation technique(PLAL)to fabricate novel PMMA/G/Ag nanocomposites with less laser energy and short time ablation and study the structural,morphological and optical properties.The X-ray diffraction(XRD)confirmed that the GNPs and AgNPs in the PMMA matrix have a crystallite size increased with increasing the pulse number.Also,the SEM images confirm the homogeneous distribution of the GNPs and AgNPs in the PMMA matrix and the sizes of particles in the nanoscale.Additionally,the link between GNPs and AgNPs in the polymer matrix has been confirmed by the FTIR.Moreover,UV-VIS spectroscopy was studied and confirm the nanocomposite has optical properties with the presence of the polymer as a host and calculating the optical energy gap.For that,this novel nanocomposite with these properties promising for many applications.Finally,the study proved that the PLAL is very suitable for decorated graphene and metal on the polymer matrix with lower pulse laser energy and short ablation time.展开更多
The synthesis of gold nanoparticles(Au NPs)was carried out by utilising the pulsed laser ablation in liquids(PLAL)method with a microchip laser(MCL)system.This portable system features low power consumption and a gian...The synthesis of gold nanoparticles(Au NPs)was carried out by utilising the pulsed laser ablation in liquids(PLAL)method with a microchip laser(MCL)system.This portable system features low power consumption and a giant-pulse laser.Aqueous solutions with and without the surfactant poly(N-vinyl-2-pyrrolidone)(PVP)were used for laser ablation of a bulk gold rod to achieve the successful formation of a colloidal solution of Au NPs.The gas bubbles formed by heating the aqueous medium around the surface of the gold target significantly reduced the efficiency of Au NP ablation.This effect was more pronounced and prolonged in high-viscosity solutions,hindering energy transfer from subsequent laser pulses to the target.Additionally,it was suggested that the chain length of PVP does not affect either the size of the Au NPs or the ablation efficiency.Videography experiments were conducted to explore the ablation mechanism employed by the MCL system.The relatively short pulse duration of the MCL system may contribute to the formation of NPs with consistent size,which were suppressed to grow in significantly smaller cavitation bubbles with short lifetimes.展开更多
文摘In this work,By using the laser ablation technique(PLAL)to fabricate novel PMMA/G/Ag nanocomposites with less laser energy and short time ablation and study the structural,morphological and optical properties.The X-ray diffraction(XRD)confirmed that the GNPs and AgNPs in the PMMA matrix have a crystallite size increased with increasing the pulse number.Also,the SEM images confirm the homogeneous distribution of the GNPs and AgNPs in the PMMA matrix and the sizes of particles in the nanoscale.Additionally,the link between GNPs and AgNPs in the polymer matrix has been confirmed by the FTIR.Moreover,UV-VIS spectroscopy was studied and confirm the nanocomposite has optical properties with the presence of the polymer as a host and calculating the optical energy gap.For that,this novel nanocomposite with these properties promising for many applications.Finally,the study proved that the PLAL is very suitable for decorated graphene and metal on the polymer matrix with lower pulse laser energy and short ablation time.
基金supported by JSPS KAKENHI(JP19K22187)Foundation for the Promotion of Science&Engineering for financial supportthe Japan International Cooperation Agency(JICA)and Otsuka Toshimi Scholarship Foundation(21-S58 and 22-S30)for kindly providing scholarships.
文摘The synthesis of gold nanoparticles(Au NPs)was carried out by utilising the pulsed laser ablation in liquids(PLAL)method with a microchip laser(MCL)system.This portable system features low power consumption and a giant-pulse laser.Aqueous solutions with and without the surfactant poly(N-vinyl-2-pyrrolidone)(PVP)were used for laser ablation of a bulk gold rod to achieve the successful formation of a colloidal solution of Au NPs.The gas bubbles formed by heating the aqueous medium around the surface of the gold target significantly reduced the efficiency of Au NP ablation.This effect was more pronounced and prolonged in high-viscosity solutions,hindering energy transfer from subsequent laser pulses to the target.Additionally,it was suggested that the chain length of PVP does not affect either the size of the Au NPs or the ablation efficiency.Videography experiments were conducted to explore the ablation mechanism employed by the MCL system.The relatively short pulse duration of the MCL system may contribute to the formation of NPs with consistent size,which were suppressed to grow in significantly smaller cavitation bubbles with short lifetimes.
