Photothermal applications to the thermal analysis of solids

Mandelis, Andreas

doi:10.1007/bf01932803

Cited by 23 publications

(8 citation statements)

References 97 publications

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“…In our previous work, the PAS method was used to study semiconductor nanoparticles, in order to measure their electronic properties (e.g., band gap). − As far as we know, there are only a few published studies where PAS was used to measure surface plasmon resonance (SPR), − and none of these papers described SPR measurements of small nanoparticles of the size described in this report. PAS may be very useful for the study of such particles, because in the case of analogous semiconductors, nanoparticle PAS was a superior technique, relative to other optical methods such as diffuse reflectance and absorption spectroscopy. , …”

Section: Resultsmentioning

confidence: 99%

Sonochemical Deposition of Silver Nanoparticles on Silica Spheres

et al. 2002

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Silver nanoparticles with an average size of ∼5 nm were deposited on the surface of preformed silica submicrospheres with the aid of power ultrasound. Ultrasound irradiation of a slurry of silica submicrospheres, silver nitrate, and ammonia in an aqueous medium for 90 min under an atmosphere of argon to hydrogen (95:5) yielded a silver−silica nanocomposite. By controlling the atmospheric and reaction conditions, we could achieve the deposition of metallic silver on the surface of the silica spheres. The resulting silver-deposited silica submicrosphere samples were characterized with X-ray diffraction, transmission electron microscopy, differential scanning calorimetry, energy-dispersive X-ray analysis, high-resolution transmission electron microscopy, high-resolution scanning electron microscopy, photoacoustic spectroscopy, and Fourier transform infrared, UV−visible, and X-ray photoelectron spectroscopy.

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Section: Resultsmentioning

confidence: 99%

Sonochemical Deposition of Silver Nanoparticles on Silica Spheres

et al. 2002

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“…[208][209][210] Either the amplitude or phase signals can be used to extract thermal properties of thin films and interfaces. [211][212][213] Modulation of optical heating lasers are typically limited to several megahertz, but have also been pushed to hundreds of megahertz.…”

Section: Experimental Methodsmentioning

confidence: 99%

Nanoscale heat transfer – from computation to experiment

Luo

Chen

2013

Phys. Chem. Chem. Phys.

246

208

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Heat transfer can differ distinctly at the nanoscale from that at the macroscale. Recent advancement in computational and experimental techniques has enabled a large number of interesting observations and 5 understanding of heat transfer processes at the nanoscale. In this review, we will first discuss recent advances in computational and experimental methods used in nanoscale thermal transport studies, followed by reviews of novel thermal transport phenomena at the nanoscale observed in both computational and experimental studies, and discussion on current understanding of these novel phenomena. Our perspectives on challenges and opportunities on computational and experimental 10 methods are also presented. IntroductionHeat transfer at the nanoscale can differ distinctly from that predicted by classical laws.1 Understanding nanoscale heat transfer will help thermal management of electronic, optical, and 15 optoelectronic devices, and design new materials with different thermal transport properties for energy conversion and utilization. Research on nanoscale heat transfer has advanced significantly over the past two decades, and a large number of interesting phenomena have been observed. 20The record-high thermal conductivities were computationally calculated (6600 W/mK at room temperature) 2 and experimentally measured (3500 W/mK at room temperature) 3 in a single-walled carbon nanotube (CNT), a one-dimensional system with thermal conductivity exceeding that of diamond -25 the best known heat conductor in bulk form. The thermal conductivities of CNTs are not only high but could also be diverging due to the one-dimensional nature of thermal transport. [4][5][6] Graphene 7 has also been reported to have exceptionally high thermal conductivity (5800 W/mK). Polymers, such as polyethylene, are usually regarded as thermal insulators in the amorphous phase (~0.3 W/mK). 9 However, simulations suggest that along a polyethylene molecular chain, thermal conductivity is high and could even be divergent.10 Ultradrawn polyethylene nanofibers are found to have thermal 35 conductivities (~100 W/mK) hundreds of times higher than their amorphous counterparts. 11 In fluids suspended with nanoparticles, thermal conductivity enhancement way beyond the amount predicted by traditional effective medium theory has been reported. 12,13 This observation has inspired a large amount of 40 research both theoretically and experimentally to explore the mechanism and applications of the enhanced thermal transport in nanofluids. [14][15][16][17][18][19] Theories have predicted that radiative heat transfer between objects separated at small distances increase significantly with decreasing separations, supported by a few 45 prior experiments performed at micrometer or larger separations. [20][21][22] Recent experiments have pushed the separations between surfaces to tens of nanometers, and radiative heat transfer many orders of magnitude higher than that predicted by Planck's blackbody radiation law has been reported. Besides the high and inc...

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“…Thermal diffusivity estimation using PAS [6,10] involves the study of phase and amplitude character of acoustic wave in closed volume for the given different chopping frequencies. The plot between normalized photoacoustic signal amplitude verses square root of chopping frequency is used to estimate critical chopping frequency.…”

Section: Resultsmentioning

confidence: 99%

“…Thermal transport properties like thermal diffusivity, thermal conductivity and thermal effusivity play a signi cant role in process involving heat transfer [4]. Among standard transient methods, laser ash method [5] and photothermal techniques are most popular methods for the estimation of thermal diffusivity of solids and to characterize/evaluate the thermal behaviours [6][7][8]. Particularly, in the eld of applied optics, Photonics, crystals utilized for harmonic generation, light ampli cation, transmission, and manipulation, the understanding of the above thermal properties are decisive.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Thermo-physical Properties of L-Valinium Picrate Single Crystal for Modern Applications

Manivannan

Balachandar²,

Jose

et al. 2021

Preprint

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Good quality L-valinium picrate single crystal was grown by slow evaporation technique. The lattice parameters of the crystal were measured by single crystal X-ray diffraction analysis. The High resolution X-ray diffraction study reveals good crystalline perfection of the grown crystals. The thermal diffusivity and specific heat capacity were experimentally measured using photoacoustic technique and standard DSC technique, respectively. The thermo physical properties such as thermal conductivity, thermal diffusivity, specific heat capacity, volumetric specific heat capacity, and thermal effusivity of LVP are reported for the first time at ambient temperature.

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Photothermal applications to the thermal analysis of solids

Cited by 23 publications

References 97 publications

Sonochemical Deposition of Silver Nanoparticles on Silica Spheres

Sonochemical Deposition of Silver Nanoparticles on Silica Spheres

Nanoscale heat transfer – from computation to experiment

Investigation on Thermo-physical Properties of L-Valinium Picrate Single Crystal for Modern Applications

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