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Photothermal effect in Semiconductors
Physical Review, 1961When a sample of semiconducting material is illuminated, pairs of excess carriers are generated which diffuse through the material according to the density gradients established. Each pair carries an energy approximately equal to the band gap of the material.
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Pyrometry using a photothermal effect
Annual Meeting Optical Society of America, 1986Pyrometry is a widely used nonintrusive technique to measure surface temperature. The signal received by the detector results from both intrinsic emission and ambient radiation reflected from the sample. The first problem is to measure quantitatively the emission only. This being achieved, the problem of the generally unknown emissivity remains.
O. Berthet, J. J. Greffet
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Nonlinear effects in single-particle photothermal imaging
The Journal of Chemical Physics, 2023Although photothermal imaging was originally designed to detect individual molecules that do not emit or small nanoparticles that do not scatter, the technique is now being applied to image and spectroscopically characterize larger and more sophisticated nanoparticle structures that scatter light strongly.
Claire A. West +7 more
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Photothermal Transfection for Effective Nonviral Genome Editing
ACS Applied Bio Materials, 2021The efficient nonviral delivery of nucleic acids into the cytoplasm is needed to fully realize the potential of gene therapy. Although cationic lipids and nanoparticles have been widely used to improve the intracellular delivery of nucleic acids, they suffer from cytotoxicity and poor endosomal escape, thus limiting the transfection efficacy.
Nuri Oh +3 more
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Photothermal Dielectric Effect with Liquid
Japanese Journal of Applied Physics, 1996A new photothermal technique for measuring the thermal characteristics of a liquid is proposed. This is based on the temperature characteristic of the dielectric constant of light-irradiated liquid. When an alternating temperature change occurs in a liquid material due to the absorption of chopped light, an alternating variation of ...
Yasuo Cho Yasuo Cho +1 more
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The effect of edges on photothermal imaging
Journal of Applied Physics, 1991The photothermal edge effect was theoretically investigated under the realistic assumption of a Gaussian distributed heating beam, which is not only absorbed at the upper surface of the sample, but because of scattered light also in the vertical plane.
Kerstin Friedrich, Heinz-Guenter Walther
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Photothermal effects in mobile nanotweezers
2018 4th IEEE International Conference on Emerging Electronics (ICEE), 2018Magnetically driven mobile plasmonic nanotweezers [1] are potential candidates for various device applications pertaining to optical manipulation which are otherwise difficult to achieve using existing techniques. When illuminated, plasmonic nanoantennas generate enhanced localized electric field which imparts mechanical gradient force to trap sub ...
Souvik Ghosh, Ambarish Ghosh
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Microstructures
Photocatalysis (PC) and photoelectric catalysis (PEC) are environmental protection technologies that use sunlight capacity and environmental governance, and they have a wide range of applications in hydrogen production, carbon dioxide reduction, organic degradation, and other fields.
Jingnan Zhang +5 more
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Photocatalysis (PC) and photoelectric catalysis (PEC) are environmental protection technologies that use sunlight capacity and environmental governance, and they have a wide range of applications in hydrogen production, carbon dioxide reduction, organic degradation, and other fields.
Jingnan Zhang +5 more
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Photothermal effect in imaging of the cells
Proceedings of 16th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2002The photothermal (PT) effect is applied for imaging and quantitative studies of samples with low optical contrast or low absorbance. The dual pulsed laser setup combined with phase-contrast illumination of a sample by probe laser provides visualisation of temperature field or absorbing structure of a sample.
D.O. Lapotko, G.S. Kuchinsky
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Temperature effect on photothermal lens phenomena in water: Photothermal defocusing and focusing
Chemical Physics Letters, 1989Abstract Depending on whether the measurements are performed at temperatures lower or higher than −0.01°C, the photoinduced thermal lens in water can have either positive (converging) or negative (diverging) focal length. At precisely −0.01±0.04°C, no thermal lens signal could be observed.
Mladen Franko, Chieu D. Tran
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