Nonlinear optical limiting and dual beam mode matched thermal lensing of nano fluids containing green synthesized copper nanoparticles

John, Jancy; Mathew, Roy J.; Rejeena, I.; Jayakrishnan, R.; Mathew, S.; Thomas, Vinoy; Mujeeb, A.

doi:10.1016/j.molliq.2019.01.125

Cited by 23 publications

(9 citation statements)

References 14 publications

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“…Since Cu NPs represent an ideal compromise between cost and remarkable properties, they find applications as catalysts [4], electrochemical [5] and photonic [6] devices, sensors [7], optical [8] and magnetic [9] devices, environmental remediation [10], heat exchangers [11], and heat transfer fluids [12].…”

Section: Introductionmentioning

confidence: 99%

Microwave-assisted and Ultrasonic Phyto-synthesis of Copper Nanoparticles: A Comparison Study

Hadinejad¹,

Jahanshahi²,

Morad³

2020

Nano BioMed ENG

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Elimination of hazardous chemicals in the process of synthesis, which guarantees the safety of the nanoparticles (NPs) for therapeutic utilization, could be obtained by using the phyto-synthesis method. The present project is a multidimensional survey that aimed to optimize the phyto-synthesis conditions of copper nanoparticles (Cu NPs) using the microwave and ultrasound-assisted methods and facilitate approaching the dilemma of choosing between these two methods by characterizing the final products of each method. Based on the transmission electron microscopy (TEM), the obtained NPs were sub 10 nm in both methods. The optimized NPs were achieved in 5 min using 6 mL of phytoextract at 95 °C in a microwave oven, and amplitude 100% and cycle 0.8 in an ultrasonic processor. In addition to the antibacterial property and molecular wound healing stimulation of Cu NPs, these amorphous nanoscale particles could provide desirable absorption and distribution over the wounds to be suggested as an effective transdermal drug delivery system. The ultrasound-assisted method was the most appropriate way to obtain an amorphous mixture of Cu NPs with a majority of copper oxide while the microwave-assisted method was more suitable for synthesis procedures using plant extracts with heat-sensitive and volatile components.

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Section: Introductionmentioning

confidence: 99%

Microwave-assisted and Ultrasonic Phyto-synthesis of Copper Nanoparticles: A Comparison Study

Hadinejad¹,

Jahanshahi²,

Morad³

2020

Nano BioMed ENG

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“…Due to the refractive index gradient, the medium acts as a lens‐like optical element, called TL . When a probe beam passes through the spatially varying refractive index (lens), it gets diverged or focused depending upon the coefficient of refractive index with temperature,

\frac{dn}{dT} .

The negative value of

\frac{dn}{dT}

shows that the TL formed will be a diverging one resulting in thermal blooming. Measurement of time‐dependent beam intensity is more viable in a mode matched pump–probe collinear arrangement than to measure the spot size directly.…”

Section: Resultsmentioning

confidence: 99%

“…Surrounding medium or solvent used may alter the optical properties of the nanoparticles in different ways. Different solvents have different refractive index and different electric dipole moments . It also affect the thermal properties of the material.…”

Section: Resultsmentioning

confidence: 99%

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Eco‐friendly thermal insulation material from cellulose nanofibre

Jose

Thomas

Raj

et al. 2019

J of Applied Polymer Sci

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Nano cellulose is a material of current interest that has attracted considerable attention from researchers due to its interesting properties such as low toxicity, availability, natural abundance, biodegradability, and flexible surface chemistry. Cellulose fiber, usually derived from wood, plant walls or cotton is an eco-friendly thermal insulation material. The cellulose nanofibers (CNFs) described in this work were derived from cotton via sulfuric acid hydrolysis followed by ultrasonication. The formation of CNF and its morphology were analyzed using Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). The thermooptic parameters of the prepared sample, which to the author's knowledge has not been reported so far, were studied by the dual beam mode-matched thermal lens technique. Thermal diffusivity (2.61 × 10 −8 m 2 /s) and thermal conductivity (0.108 W/mK) values of the prepared CNFs clearly point to the application potential of the material.

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“…In the outlook of mounting desideratum for materials for technological applications, nonlinear optical (NLO) materials have attained prominence in meeting the expectations of continuously growing area of information technology and industries in terms of its contribution to telecommunications, optical data storage, optical computing, photonic technology, optical switching, dynamic holography, optical limiting, image manipulation, image processing, and many more . Right from the first ever observation of NLO effect, the second‐harmonic generation (SHG) by Franken et al in 1961, till date, NLO expertise is developing speedily as shown by the innumerable scientific reports adding to the current knowledge and driving to the discovery of phenomenon such as third‐harmonic generation, optical bistability, two‐photon absorption, stimulated Raman scattering, self‐focusing of light, and optical phase conjugationetc, which broaden the scope of nonlinear materials in chemistry, physics, biology, and engineering streams.…”

Section: Introductionmentioning

confidence: 99%

A DFT probe on the linear and nonlinear optical characteristics of some star‐shaped D_I‐π‐D_II‐Atype acetylene‐bridged rigid triazines

Vidya

Chetti

2019

J of Physical Organic Chem

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The density functional theory (DFT) computations of linear and nonlinear optical characteristics of nine star-shaped D I -π-D II -Atype molecules, which encompass electron-donating phenyl rings connected by acetylene linkage and an electron-accepting triazine core, were accomplished in present work.The phenyl rings were augmented with functionalities of diverse electrondonating and electron-accepting abilities to inspect the effects of substituents on linear and nonlinear optical properties of molecules. The assessment of the potential nonlinear nature of molecules was carried out by computing their second-order nonlinearities using DFT methods to find that target molecules possessed superior nonlinear optical characteristics. The influence of various DFT methods and basis sets on optical characteristics was also scrutinized.

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Nonlinear optical limiting and dual beam mode matched thermal lensing of nano fluids containing green synthesized copper nanoparticles

Cited by 23 publications

References 14 publications

Microwave-assisted and Ultrasonic Phyto-synthesis of Copper Nanoparticles: A Comparison Study

Microwave-assisted and Ultrasonic Phyto-synthesis of Copper Nanoparticles: A Comparison Study

Eco‐friendly thermal insulation material from cellulose nanofibre

A DFT probe on the linear and nonlinear optical characteristics of some star‐shaped D_I‐π‐D_II‐Atype acetylene‐bridged rigid triazines

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Nonlinear optical limiting and dual beam mode matched thermal lensing of nano fluids containing green synthesized copper nanoparticles

Cited by 23 publications

References 14 publications

Microwave-assisted and Ultrasonic Phyto-synthesis of Copper Nanoparticles: A Comparison Study

Microwave-assisted and Ultrasonic Phyto-synthesis of Copper Nanoparticles: A Comparison Study

Eco‐friendly thermal insulation material from cellulose nanofibre

A DFT probe on the linear and nonlinear optical characteristics of some star‐shaped DI‐π‐DII‐Atype acetylene‐bridged rigid triazines

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Product

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A DFT probe on the linear and nonlinear optical characteristics of some star‐shaped D_I‐π‐D_II‐Atype acetylene‐bridged rigid triazines