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Thermal conductivity of thin metallic films measured by photothermal profile analysis
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In this article, the authors measured the thermal conductivity of nickel and gold films on quartz (thickness 0.4-8 μm) by a modulated thermoreflectance technique recording the surface temperature profile.Abstract:
Thermal conductivity of nickel and gold films on quartz (thickness 0.4–8 μm) was measured by a modulated thermoreflectance technique recording the surface temperature profile. Model calculations predict an optimum frequency for measuring thermal transport within the film. Measurements on films with various thicknesses reveal a thermal conductivity close to the bulk value for nickel while gold films exhibit a reduced conductivity with decreasing film thickness.read more
Citations
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A Bioinspired, Reusable, Paper‐Based System for High‐Performance Large‐Scale Evaporation
Yanming Liu,Shengtao Yu,Rui Feng,Antoine Bernard,Yang Liu,Yao Zhang,Duan Haoze,Wen Shang,Peng Tao,Chengyi Song,Tao Deng +10 more
TL;DR: This paper-based system with enhanced surface roughness and low thermal conductivity exhibits increased efficiency of evaporation, scale-up potential, and proven reusability and is also demonstrated to be potentially useful in seawater desalination.
Journal ArticleDOI
Graphene quilts for thermal management of high-power GaN transistors
TL;DR: It is shown that thermal management of GaN transistors can be substantially improved via introduction of alternative heat-escaping channels implemented with few-layer graphene-an excellent heat conductor, and that graphene quilts perform even better in GaN devices on sapphire substrates.
Journal ArticleDOI
Direct measurement of through-plane thermal conductivity and contact resistance in fuel cell materials
TL;DR: In this paper, the through-plane thermal conductivity of various diffusion media, catalyst layer, and the thermal contact resistance between diffusion media and a metal plate as a function of temperature and pressure was performed.
Journal ArticleDOI
A frequency-domain thermoreflectance method for the characterization of thermal properties.
TL;DR: A frequency-domain thermoreflectance method for measuring the thermal properties of homogenous materials and submicron thin films and its sensitivity to various thermal properties is given, along with results from measurements of several standard materials over a wide range of thermal diffusivities.
Journal ArticleDOI
Principles of photothermal gas-phase heterogeneous CO2 catalysis
TL;DR: In this article, a critical appraisal of the concepts and principles underpinning the theory and practice of photothermal CO2 catalysis is provided, and the goal is to gain an appreciation of the scientific, technological, economic, and environmental challenges inevitably confronted by those pursuing the development of photiorient refineries.
References
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Book
Conduction of Heat in Solids
H. S. Carslaw,John Conrad Jaeger +1 more
TL;DR: In this paper, a classic account describes the known exact solutions of problems of heat flow, with detailed discussion of all the most important boundary value problems, including boundary value maximization.
Journal ArticleDOI
Influence of apparatus geometry and deposition conditions on the structure and topography of thick sputtered coatings
TL;DR: Two cylindrically symmetric and complementary sputtering geometries, the post and hollow cathodes, were used to deposit thick coatings of various metals (Mo, Cr, Ti, Fe, Cu, and Al-alloy) onto glass and metallic substrates at deposition rates of 1000-2000 A/min under various conditions of substrate temperature, argon pressure, and plasma bombardment as mentioned in this paper.
Journal ArticleDOI
Detection of thermal waves through optical reflectance
TL;DR: In this article, thermal wave detection and analysis can be performed, in a noncontact and highly sensitive manner, through the dependence of sample optical reflectance on temperature, which is demonstrated by an example of measuring the thickness of thin metal films.
Journal ArticleDOI
Photothermal displacement spectroscopy: An optical probe for solids and surfaces
TL;DR: In this paper, a photothermal displacement spectroscopy (PDS) was proposed for determining the optical and thermal properties of solids, surfaces and thin films, based on the detection of the thermal expansion of a sample upon absorption of electromagnetic radiation.
Journal ArticleDOI
Thermal conductivity of thin films: Measurements and understanding
TL;DR: In this paper, thermal conductivity and phonon scattering can be measured in films of thicknesses ranging from angstroms to millimeters, and it is shown that phonons are very sensitive probes of the structural perfection of the films.