The Experts below are selected from a list of 89556 Experts worldwide ranked by ideXlab platform
A Allahham - One of the best experts on this subject based on the ideXlab platform.
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synthesis and characterization of 8 hydroxyquinolin 1 ium 2 2 2 trifluoroacetate and 8 hydroxyquinolin 1 ium 2 2 2 trichloroacetate by z scan technique
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2018Co-Authors: M D Zidan, A Arfan, A AllahhamAbstract:The 8-hydroxyquinolin-1-ium 2,2,2-trifluoroacetate and 8-hydroxyquinolin-1-ium 2,2,2-trichloroacetate (8-HQ) salts have been synthesized and characterized by FTIR, NMR and UV-Vis Absorption spectroscopic methods. The third order nonlinear optical properties (NLO) of the two 8-HQ salts have been investigated by z-scan technique. The recorded experimental data led to calculate the nonlinear optical Absorption coefficient (β), the nonlinear refractive index (n2), the excited-state Absorption cross section (σex) and the ground-state Absorption cross section (σg) of the studied compounds. The two 8-HQ salts have been found to exhibit large optical nonlinearity. These types of materials may be considering new photonic applications.
M D Zidan - One of the best experts on this subject based on the ideXlab platform.
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synthesis and characterization of 8 hydroxyquinolin 1 ium 2 2 2 trifluoroacetate and 8 hydroxyquinolin 1 ium 2 2 2 trichloroacetate by z scan technique
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2018Co-Authors: M D Zidan, A Arfan, A AllahhamAbstract:The 8-hydroxyquinolin-1-ium 2,2,2-trifluoroacetate and 8-hydroxyquinolin-1-ium 2,2,2-trichloroacetate (8-HQ) salts have been synthesized and characterized by FTIR, NMR and UV-Vis Absorption spectroscopic methods. The third order nonlinear optical properties (NLO) of the two 8-HQ salts have been investigated by z-scan technique. The recorded experimental data led to calculate the nonlinear optical Absorption coefficient (β), the nonlinear refractive index (n2), the excited-state Absorption cross section (σex) and the ground-state Absorption cross section (σg) of the studied compounds. The two 8-HQ salts have been found to exhibit large optical nonlinearity. These types of materials may be considering new photonic applications.
A Arfan - One of the best experts on this subject based on the ideXlab platform.
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synthesis and characterization of 8 hydroxyquinolin 1 ium 2 2 2 trifluoroacetate and 8 hydroxyquinolin 1 ium 2 2 2 trichloroacetate by z scan technique
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2018Co-Authors: M D Zidan, A Arfan, A AllahhamAbstract:The 8-hydroxyquinolin-1-ium 2,2,2-trifluoroacetate and 8-hydroxyquinolin-1-ium 2,2,2-trichloroacetate (8-HQ) salts have been synthesized and characterized by FTIR, NMR and UV-Vis Absorption spectroscopic methods. The third order nonlinear optical properties (NLO) of the two 8-HQ salts have been investigated by z-scan technique. The recorded experimental data led to calculate the nonlinear optical Absorption coefficient (β), the nonlinear refractive index (n2), the excited-state Absorption cross section (σex) and the ground-state Absorption cross section (σg) of the studied compounds. The two 8-HQ salts have been found to exhibit large optical nonlinearity. These types of materials may be considering new photonic applications.
M Weber - One of the best experts on this subject based on the ideXlab platform.
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temperature dependent ozone Absorption cross section spectra measured with the gome 2 fm3 spectrometer and first application in satellite retrievals
Atmospheric Measurement Techniques, 2012Co-Authors: W Chehade, B Gur, Peter Spietz, Victor Gorshelev, Anna Serdyuchenko, J P Burrows, M WeberAbstract:Abstract. The Global Ozone Monitoring Experiment-2 (GOME-2) Flight Model (FM) Absorption cross section spectra of ozone were measured under representative atmospheric conditions in the laboratory setup at temperatures between 203 K and 293 K in the wavelength range of 230–790 nm at a medium spectral resolution of 0.24 to 0.54 nm. Since the exact ozone amounts were unknown in the gas flow system used, the measured ozone cross sections were required to be scaled to absolute cross section units using published literature data. The Hartley, Huggins and Chappuis bands were recorded simultaneously and their temperature dependence is in good agreement with previous studies (strong temperature effect in the Huggins band and weak in the Hartley and Chappuis bands). The overall agreement of the GOME-2 FM cross sections with the literature data is well within 3%. The total ozone column retrieved from the GOME-2/MetOp-A satellite using the new cross section data is within 1% compared to the ozone amounts retrieved from the standard retrieval performed for GOME-2.
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measurement of the two photon Absorption cross section of liquid argon with a time projection chamber
arXiv: Instrumentation and Detectors, 2010Co-Authors: I Badhrees, A Ereditato, I Kreslo, M Messina, U Moser, Biagio Rossi, M Weber, M Zeller, C Altucci, S AmorusoAbstract:This paper reports on laser-induced multiphoton ionization at 266 nm of liquid argon in a time projection chamber (LAr TPC) detector. The electron signal produced by the laser beam is a formidable tool for the calibration and monitoring of next-generation large-mass LAr TPCs. The detector that we designed and tested allowed us to measure the two-photon Absorption Cross-Section of LAr with unprecedented accuracy and precision: sigma_ex=(1.24\pm 0.10stat \pm 0.30syst) 10^{-56} cm^4s{-1}.
Hui Chen - One of the best experts on this subject based on the ideXlab platform.
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modification in light Absorption cross section of laboratory generated black carbon brown carbon particles upon surface reaction and hydration
Atmospheric Environment, 2015Co-Authors: Hui Chen, Dawei Hu, Lin Wang, Abdelwahid Mellouki, Jianmin ChenAbstract:Recent reports indicate that the Absorption enhancement of black carbon (BC) and brown carbon (BrC) particles is determined by the evolution of morphology and mixing state during the atmospheric processing. In this study, laboratory-generated BC-BrC mixture particles (BC-BrC) were exposed to sulfuric acid, ammonia/triethylamine, and water vapor sequentially to investigate the alteration in light Absorption, morphology and mixing state during simulated atmospheric processing. Condensation of sulfuric acid and exposure to ammonia or triethylamine at 5% relative humidity decreased light Absorption cross section of BC-BrC by 13%–26%, but subsequent hydration at 85% relative humidity led to an increase by 5%–20%. Our results show that surface reactions and hydration can significantly alter the light Absorption cross section of BC-BrC. Our observation suggests that the restructuring of BC-BrC induced by neutralization reactions on the BC-BrC surface was responsible for the reduction in light Absorption cross section at low relative humidity. On the other hand, the formation of an aqueous coating through water uptake by the hydrophilic inorganic coating at high relative humidity caused an Absorption enhancement.
