Results 91 to 100 of about 1,306,141 (231)

Photoacoustic spectroscopy as a method in biological investigations

Archives of Acoustics, 2015
The present paper describes a new method of photoacoustic spectroscopy for the investigation of the properties of materials. This method is applied in studies of both inorganic and organic materials, including biological structures. The paper also gives
Jerzy MOTYLEWSKI, Jerzy RANACHOWSKI
doaj  

Differential photoacoustic-stimulated Raman spectroscopy (DPA-SRS) for high-sensitivity hydrogen detection

Photoacoustics
To detect non-polar, infrared-inactive hydrogen, a Differential Photoacoustic-Stimulated Raman Spectroscopy (DPA-SRS) method is proposed. Utilizing the SRS process, a portion of the pump light is converted into intense Stokes light corresponding to the ...
Xin Yu, Zhengang Li, Jiaxiang Liu, Haichun Xu, Junfang Miao, Canlong Wang, Yongqing Fang, Ying Pan, Yonghua Fang   +8 more
doaj   +1 more source

Photoacoustic spectroscopy of solids and surfaces [PDF]

, 1981
After briefly reviewing the theory and instrumentation, results from a variety of experiments carried out by the authors on the photoacoustic spectroscopy of solids and surfaces by employing an indigenous spectrometer are discussed in the light of the ...
Rao, CNR, Ganguly, P., Rao, C. N. R., Ganguly, P   +3 more
core   +1 more source

Tunable, High Pulse Energy and Narrow Linewidth Gas‐Filled Fiber Laser Across Near‐ and Mid‐Infrared

Laser &Photonics Reviews, EarlyView.
A cascaded gas‐filled anti‐resonant hollow‐core fiber architecture enables broadly tunable infrared Raman lasers spanning ∼1.4–4.6 µm while maintaining microjoule‐level pulse energies and gigahertz‐level linewidths. The approach combines a wavelength‐tunable pump laser with optimized Raman frequency conversion, providing a compact route to high ...
Yazhou Wang, Marcello Meneghetti, Manoj K. Dasa, Timothy Bate, J. E. Antonio‐Lopez, Ian A. Davidson, Qiang Fu, Jaroslaw Rzegocki, Gregory T. Jasion, Francesco Poletti, Rodrigo Amezcua‐Correa, Christos Markos   +11 more
wiley   +1 more source

Optical Stimulation and Monitoring of the Peripheral Nervous System: Perspectives and Challenges Toward Clinical Translation

Laser &Photonics Reviews, EarlyView.
Optical neuromodulation with IR light allows stimulation of the PNS without the need for physical contact with the target nerve or without requiring any genetic modification. The clinical translation of this technique will pave the way to the development of neural interfaces for restoring sensory feedback in individuals with limb amputation.
Federica Piccirillo, Sarassunta Ucci, Anna Aliberti, Patrizio Vaiano, Alessia La Rocca, Francesca Angelone, Silvia Pascarella, Pellegrino Lippiello, Maria Concetta Miniaci, Giuseppe Prisco, Michela Russo, Francesco Amato, Deyanira Contartese, Milena Fini, Gianluca Giavaresi, Lucia Martini, Francesco Rosa, Cosimo Gentile, Emanuele Gruppioni, Armando Ricciardi, Andrea Cusano   +20 more
wiley   +1 more source

Low-Cost, LED-Based Photoacoustic Spectrophone Using Hemispherical Acoustic Resonant Cavity for Measurement of Hydrocarbon Gases

Atmosphere
Spherical acoustic resonant cavities have been increasingly reported in photoacoustic spectroscopy due to their small volume and enhanced effective gas absorption path length.
Gaoxuan Wang, Lingxiao Hou, Fangjun Li, Lihui Wang, Chao Fei, Xiaojian Hong, Sailing He   +6 more
doaj   +1 more source

Migration of Erucamide in Polyethylene Film

Polymer Engineering &Science, EarlyView.
Erucamide migration in polyethylene films as a function of time and temperature, evaluated by FTIR‐PAS and correlated with changes in surface morphology and contact angle. ABSTRACT Erucamide is a migratory slip agent widely used in polyethylene (PE) films for flexible packaging applications, particularly those processed on high‐speed filling and ...
Kelly Cristina Maziero, Luís Carlos Malacarne, Monique de Souza, Raquel da Silva Palácios, Mauro Luciano Baesso, Alessandro Francisco Martins, Elisângela Corradini, Edvani Curti Muniz   +7 more
wiley   +1 more source

Ultra-highly sensitive dual gases detection based on photoacoustic spectroscopy by exploiting a long-wave, high-power, wide-tunable, single-longitudinal-mode solid-state laser

Light: Science & Applications
Photoacoustic spectroscopy (PAS) as a highly sensitive and selective trace gas detection technique has extremely broad application in many fields. However, the laser sources currently used in PAS limit the sensing performance. Compared to diode laser and
Shunda Qiao, Ying He, Haiyue Sun, Pietro Patimisco, Angelo Sampaolo, Vincenzo Spagnolo, Yufei Ma   +6 more
doaj   +1 more source

Characterization Of Human Skin Through Photoacoustic Spectroscopy [PDF]

, 2015
The photoacoustic technique is based on the absorption of modulated light by a sample and subsequent heat generation. This generates thermal waves that propagate in the surrounding media According to the Rosencwaig-Gersho Model, such waves produce the ...
Acosta-Avalos D., Barja P.R., Anjos F.H.D., Martin A., Mansanares A.M., Da Silva E.C., Rompe P.C.B.   +6 more
core   +1 more source

Gas cell photoacoustic detection of ultrasound absorption

, 2022
Paper 012058The photoacoustic signal generated by a 2 MHz ultrasound transducer has been detected at 500 Hz modulation frequency by an attached photoacoustic cell.
Netzelmann, U.
core   +1 more source