Effect of concentration and particle size on nonlinearity of Au nano-fluid prepared by γ (60Co) radiation

Shahriari, Esmaeil; Yunus, Wan Mahmood Mat; Naghavi, Kazem; Talib, Zainal Abidin

doi:10.1016/j.optcom.2010.01.005

Cited by 24 publications

(18 citation statements)

References 19 publications

(18 reference statements)

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“…These results are contrary to the reported effects where the nanoparticle size decreases and the thermal conductivity increases [3]. However, our results were very similar to the reported results by Shabriari et al [4]; they show the thermo-optic relationship for which there is a nonlinear refractive index increase for an increase in the nanoparticle size, using single-beam Z-scan and TL techniques [5]. Probably, these differences may be caused by the different particles sizes and/or polydispersivities, the specific heat, density, and dynamic viscosity, or also by the different sample preparation and stabilization methods.…”

Section: Preparation Of Nanofluidssupporting

confidence: 56%

“…These results clearly show the effect of particle size on the conductivity enhancement. On the other hand, Shabriari et al [4] report the effect of particle size on the nonlinear refraction coefficient of a Au-PVA nanofluid measured by using single-beam Z-scan and thermal lens spectrometry (TLS) techniques [5]. They showed that a nonlinear effect is found with an increase in concentration or particle size; also, they reported a linear relationship between the nonlinear absorption coefficient and the concentration but the relationship between the nonlinear refractive index and the Au nanoparticle size did not show linear behavior.…”

Section: Introductionmentioning

confidence: 98%

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Photothermal Study of Two Different Nanofluids Containing SiO2 and TiO2 Semiconductor Nanoparticles

et al. 2011

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Thermal and optical properties of two different nanofluids containing SiO 2 and TiO 2 semiconductor nanoparticles were studied by thermal lens spectrometry (TLS) and spectrophotometry. In the case of SiO 2 nanofluids the transmission electron microscopy technique was used to obtain the SiO 2 nanoparticle sizes to investigate the size effect of these nanoparticles on the sample thermal diffusivity which is important in some medical applications such as photothermal-modulated drug delivery systems. On the other hand for the case of TiO 2 nanofluids, the photopyroelectric technique, TLS, scanning electron microscopy, and X-ray diffraction were employed to investigate the concentration effect on the thermal properties of these nanofluids. Thermal diffusivities and effusivities as functions of the TiO 2 nanoparticle concentrations were obtained. From the experimental results, an incremental increase in the thermal diffusivities and effusivities was observed when the nanoparticle concentration was increased, indicating that the nanoparticle concentration is an important factor to be considered to obtain nanofluids with more thermal efficiency which are required for some applications, such as degradation of residual water.

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Section: Preparation Of Nanofluidssupporting

confidence: 56%

Section: Introductionmentioning

confidence: 98%

Photothermal Study of Two Different Nanofluids Containing SiO2 and TiO2 Semiconductor Nanoparticles

et al. 2011

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“…We observed the nonlinear refraction coefficient tends to increase linearly with the increasing of particle sizes. This nonlinear refractive index particle size dependence is totally different with the one recently reported in the literature [19]. Thus the nonlinear refraction behaviour of Au-PVA nanofluid was affected by the sample synthesizing technique.…”

Section: Methodscontrasting

confidence: 75%

“…The schematic diagram of a single beam Z-scan experiment used in the present measurement is shown in Figure 1 as clearly illustrated in our previous report [19]. The experiments were performed using a 532 nm laser beam from Laser-diode (Coherent Compass SDL-532-150T).…”

Section: Methodsmentioning

confidence: 99%

“…The effect of concentration on nonlinear refraction coef- * Electronic address: mahmood@science.upm.edu.my ficient of Au nano-fluid in PVP has been measured and reported in our previous work [19]. Since increasing the γ radiation dose decreases the particle size of metal nanofluid, it is of our interest to study the effect of particle size on the nonlinear refractive index of such material.…”

Section: Introductionmentioning

confidence: 98%

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Effect of particle size on nonlinear refractive index of Au nanoparticle in PVA solution

Shahriari¹,

Yunus²,

Saion³

2010

Braz. J. Phys.

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Nonlinear refractive index of Au nanoparticle suspended in PVA solution was measured using a single beam Z-scan technique. Measurements were carried out using a green CW laser beam operated at 532 nm as excitation source. Five nanoparticle samples with different particle sizes were prepared by γ radiation method. The Au nano-fluid shows a good third order nonlinear response for particle sizes ranging from 7.0 nm to 18.7 nm. The sign of the nonlinear refractive index was found to be negative and the magnitude was in the order of 10 −8 cm 2 /W. The results show that the nonlinear effect tends to be increased linearly with the increasing of particle sizes thus could be a good candidate for nonlinear optical devices.

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Effect of thickness on the optical nonlinearity of gold colloidal nanoparticles prepared by laser ablation

Golian

Dorranian

2013

Opt Quant Electron

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Effect of concentration and particle size on nonlinearity of Au nano-fluid prepared by γ (60Co) radiation

Cited by 24 publications

References 19 publications

Photothermal Study of Two Different Nanofluids Containing SiO2 and TiO2 Semiconductor Nanoparticles

Photothermal Study of Two Different Nanofluids Containing SiO2 and TiO2 Semiconductor Nanoparticles

Effect of particle size on nonlinear refractive index of Au nanoparticle in PVA solution

Effect of thickness on the optical nonlinearity of gold colloidal nanoparticles prepared by laser ablation

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