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Journal articles on the topic 'IR et UV visible'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 May 2024

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1

Adeyemi, D. K., A. O. Adeluola, M. J. Akinbile, O. O. Johnson, and G. A. Ayoola. "Green synthesis of Ag, Zn and Cu nanoparticles from aqueous extract of Spondias mombin leaves and evaluation of their antibacterial activity." African Journal of Clinical and Experimental Microbiology 21, no. 2 (2020): 106–13. http://dx.doi.org/10.4314/ajcem.v21i2.4.

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Background: Nanotechnology offers an advantage as a green route for synthesis of metal nanoparticles (NPs) with plant extracts as capping agent. Spondias mombin is a fruit-bearing tree and its leaf extracts have been reported to possess anxiolytic, hypoglycaemic, antiepileptic, antipsychotic, sedative, antioxidant, and antimicrobial properties. The objective of the study is to determine the antibacterial potential of a simple non-toxic product of green synthesis of metallic (Ag, Zn and Cu) nanoparticles using the leaf of Spondias mombin aqueous extracts (SMAE) as a reducing and capping agents

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2

Zerguine, Riad. "Skin and the sun." Batna Journal of Medical Sciences (BJMS) 2, no. 1 (2015): 24–29. http://dx.doi.org/10.48087/bjmsra.2015.2106.

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Le soleil émet une multitude de rayonnements électromagnétiques filtrés par l’atmosphère terrestre. Arrivant à la surface de la planète, ces rayonnements sont indispensables pour l'installation et le développement de la vie. Le spectre solaire au sol comporte les ultraviolets (UV) B (290-320 nm) et les UVA (320-400 nm), la lumière visible et des infrarouges (IR). Les UV activent des molécules, appelées chromophores, contenues dans la peau et qui sont susceptibles de se modifier et ils déclenchent ainsi une cascade de réactions photochimiques ayant des conséquences biologiques et cliniques maje

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3

Fromager, M., N. Passilly, R. de Saint Denis, and E. Cagniot. "Optique binaire pour la mise en forme spatiale de faisceaux laser IR, visible et UV." Journal de Physique IV (Proceedings) 138, no. 1 (2006): 275–84. http://dx.doi.org/10.1051/jp4:2006138032.

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4

Auhmani, Abdelouahed, Hassane Bitar, Roger Phan Tan Luu, and Laura Barrios. "Comparaison des approches empirique et chimiométrique dans la modélisation des effets de solvant. Cas des propriétés spectrales en RMN, IR et UV–visible." Canadian Journal of Chemistry 69, no. 7 (1991): 1084–89. http://dx.doi.org/10.1139/v91-161.

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In this paper, we review a comparison of the empirical and chemiometrical approaches to the modelization of the effects of solvent on a number of NMR, IR and UV–visible spectral properties. The solvents have first been characterized by the π*, α and β scales, which describe respectively the polarity–polarisability, the acidity, and the basicity by hydrogen bond; the 17 most representative, with orthogonal parameters, have been chosen. An attempt has been made to rationalize the observed effects on the observed properties by using simple linear empirical models like the π*, α, and β parameters

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BARIM, Esra. "Synthesis, Characterization, Optical and Thermal Properties of P(NVC-co-BZMA) Copolymer and Its ZnO Composites." Gazi University Journal of Science Part A: Engineering and Innovation 9, no. 4 (2022): 526–36. http://dx.doi.org/10.54287/gujsa.1199767.

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Recent studies have paid particular attention to polymer-nanoparticle composite materials considering they have a number of interesting properties, which include optical, thermal, electrical, and others (Reyna-Gonzalez et al., 2009; Yakuphanoglu et al., 2010). In this study, a free radical polymerization process was used to create a copolymer of N-vinylcarbazole (NVC) and benzyl methacrylate (BZMA) at 25–75 mol% each. The procedure was conducted at 70°C with azobisisobutyronitrile (AIBN) acting as the initiator. Nano zinc oxide powders were then added to composites at three different ratios of

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Li, Tong, and Feng Tian. "Detection of O2 Produced Abiotically on Habitable but Lifeless Planets around M-dwarfs." Proceedings of the International Astronomical Union 8, S293 (2012): 39–45. http://dx.doi.org/10.1017/s1743921313012507.

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AbstractHigh atmospheric abundances of oxygen has been widely considered to be a reliable biosignature for life on exoplanets in the habitable zones of all types of stars. Recently it was proposed that the unique UV spectra of observed planet-hosting M dwarfs could lead to the buildup of molecular oxygen in the atmospheres of habitable but lifeless planets around these stars (Tian et al. 2014). However, the detectability of the accumulated O2 was not modeled. In this work we developed a new line by line radiative transfer model based on HITRAN database and used the model to simulate the reflec

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7

Thuillier, Gerard, Michel Herse, Dietrich Labs, Paul C. Simon, Didier Gillotay, and Holger Mandel. "Irradiance Observations in Near-UV, Visible and Near Infrared Spectral Bands from Measurements Carried out during ATLAS-1 and EURECA-1 Missions." International Astronomical Union Colloquium 143 (1994): 70–71. http://dx.doi.org/10.1017/s0252921100024556.

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For the ATLAS and EURECA missions, we have used two identical instruments to measure the absolute solar spectral irradiance from 180 to 3200 nm. These instruments are calibrated by use of a blackbody and a set of lamp standards. The measurements are carried out with 1 nm bandpass up to 800 nm and 20 nm above. The instruments and calibration procedures are described by Thuillier et al. (1981). The platform capability of instruments retrieval after measurements allows a post-flight calibration which is essential for accurate measurements. The main results obtained up to now are:- In the UV, the

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Gorbunova, Yuliya G., Yuliya Yu Enakieva, Sergey G. Sakharov, and Aslan Yu Tsivadze. "Synthesis and spectral properties of ruthenium(II) complexes with tetra-15-crown-5-phthalocyanine and N-donor ligands." Journal of Porphyrins and Phthalocyanines 07, no. 12 (2003): 795–800. http://dx.doi.org/10.1142/s1088424603000987.

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The synthesis of novel bis-axially coordinated ruthenium(II) complexes with tetra-15-crown-5-phthalocyanine and N-donor ligands ( R 4 Pc ) Ru ( L 2) ( R 4Pc2- = 4,5,4',5',4'',5'', 4''',5'''- tetrakis(1,4,7,10,13-pentaoxotridecamethylene)phthalocyaninate-ion, L = pyridine (py), isoquino-line (iqnl), triethylamine ( Et 3 N )) is reported. The preparation technique involves the interaction of ( R 4 Pc ) Ru ( CO )( CH 3 OH ) with trimethylamine oxide in an N-donor solvent. The advantage of this method consists in selective carbonyl ejection from ( R 4 Pc ) Ru ( CO ) X with simultaneous substi-tuti

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9

Hong, S. H., Y. J. Hwang, S. G. Lee, and D. M. Shin. "Annihilation of Photochemical Reactivity of Photo-Alignment Layer." Journal of Nanoscience and Nanotechnology 8, no. 9 (2008): 4611–15. http://dx.doi.org/10.1166/jnn.2008.ic34.

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The gas-polymer and liquid-polymer interfacial reactions of photosensitive polyimide can annihilate photo-reactive carbon–carbon double bonds, which remain after photo-alignment process. The annihilation processes dramatically affect voltage holding ratio and reorientation of photo-active functional groups. Photochemical dimerizations were identified using UV-visible and FT-IR spectroscopy. Polyimide films containing cinnamate groups were irradiated by linear polarized ultra violet (LPUV) light. Schadt et al. claims that the photo-alignment results from the anisotropy depletion of the cinnamat

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10

Gorshelev, V., A. Serdyuchenko, M. Weber, W. Chehade, and J. P. Burrows. "High spectral resolution ozone absorption cross-sections – Part 1: Measurements, data analysis and comparison with previous measurements around 293 K." Atmospheric Measurement Techniques 7, no. 2 (2014): 609–24. http://dx.doi.org/10.5194/amt-7-609-2014.

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Abstract. In this paper we discuss the methodology of taking broadband relative and absolute measurements of ozone cross-sections including uncertainty budget, experimental set-ups, and methods for data analysis. We report on new ozone absorption cross-section measurements in the solar spectral region using a combination of Fourier transform and echelle spectrometers. The new cross-sections cover the spectral range 213–1100 nm at a spectral resolution of 0.02–0.06 nm in the UV–visible and 0.12–0.24 nm in the IR at eleven temperatures from 193 to 293 K in steps of 10 K. The absolute accuracy is

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11

Al Khatib, Maher, Mohamed Harir, Jessica Costa, et al. "Spectroscopic Characterization of Natural Melanin from a Streptomyces cyaneofuscatus Strain and Comparison with Melanin Enzymatically Synthesized by Tyrosinase and Laccase." Molecules 23, no. 8 (2018): 1916. http://dx.doi.org/10.3390/molecules23081916.

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An actinobacteria strain was isolated from Algerian Sahara soil and assigned to Streptomyces cyaneofuscatus Pridham et al. 1958 species. This strain was selected for its ability to produce melanin exopigments in liquid and solid media. Melanin synthesis was associated with tyrosinase activity and the enzyme from this strain was isolated and biochemically characterized. Synthetic melanin was then enzymatically produced using the S. cyaneofuscatus Pridham et al. 1958 tyrosinase. As this enzyme showed a higher diphenolase activity, a synthetic melanin from the enzymic oxidation of 3,4-dihydroxyph

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12

Fujisawa, Jun-ichi. "Highly-selective absorption control in photosynthetic chlorin dyes." Journal of Porphyrins and Phthalocyanines 19, no. 04 (2015): 601–9. http://dx.doi.org/10.1142/s1088424614501041.

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Selective chemical control of light-absorption bands of dye molecules in which the wavelengths of two or more absorption bands are individually controlled by chemical modifications is an ultimate challenge in chemistry and an important subject for their wide applications. Recently, selective absorption tuning was first reported in photosynthetic bacteriochlorin dyes. In the bacteriochlorin dyes, either the visible or near IR band is selectively shifted by the chemical modifications almost retaining the other band. Fujisawa et al. clarified that the selective absorption tuning is accomplished b

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13

Nazir, M., R. Khattak, M. S. Khan, and I. I. Naqvi. "Study of the histidine complex of uranium(IV): synthesis, spectrophotometric, magnetic and electrochemical properties." Bulletin of the Chemical Society of Ethiopia 34, no. 3 (2021): 557–69. http://dx.doi.org/10.4314/bcse.v34i3.11.

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We synthesized the novel histidine complex of uranium(IV). A 1:3 mole ratio was found between metal and ligand by the mole ratio method, while –NH2 and –COO– groups of histidine behave as coordinating sites. The IR spectra confirmed the lone pair donating or coordinating sites. The elemental analysis confirmed the stoichiometry. The bathochromic shift with an increase in the optical density in the UV-Visible range indicated that the compound and its central metal ion hold uniform electronic charge distribution. The electrochemical results indicated a quasi-reversible (neither completely revers

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14

Jolivet, Aline, Julien Cardin, Cédric Frilay, et al. "Toward an Insulator-to-Metal Transition (IMT) in VO_x Deposited by ALD: Huge Effect on Large IR Transmission Range." ECS Meeting Abstracts MA2023-02, no. 29 (2023): 1486. http://dx.doi.org/10.1149/ma2023-02291486mtgabs.

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Vanadium dioxide (VO2) exhibits an insulating-to-metallic transition (IMT) from an insulating monoclinic to a metallic rutile phase at a IMT temperature (TIMT) of about 68 °C. This transition is accompanied by a decrease in electrical resistivity of 5 orders of magnitude and a drastic change in optical properties. Until recently, several works described the fundamental nature of the phase transition in a contradictory way, attributing it either to a structure-induced electron-phonon interaction: the Peierls transition [1], or to a strong electron-electron correlation: the Mott transition [2].

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15

Harada, Yuya, Daiki Kono, Dai Xinjie, and Tsukasa Yoshida. "Hydrogen Evolution Reaction By Metal-Free Poly-Neutral Red Electrocatalyst." ECS Meeting Abstracts MA2022-02, no. 22 (2022): 925. http://dx.doi.org/10.1149/ma2022-0222925mtgabs.

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While electric power supply by renewable sources such as solar and wind has become viable for their significant cost reduction, its intermittency demands urgent development of large scale storage technologies. Although conversion of electrical energy into storable hydrogen via electrolysis of water is ideal, noble metals and their oxides are used as electrocatalysts for their activities and stabilities. Alternative electrocatalysts out of abundant elements are needed for sustainable technological development. Recently, some metal-free organic conductive polymers with hydrogen-bonding capabilit

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16

CALDWELL, J. BRIAN. "UV-Visible-IR Refractive Lens System." Optics and Photonics News 11, no. 2 (2000): 41. http://dx.doi.org/10.1364/opn.11.2.000041.

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17

Oujja, M., E. Rebollar, C. Abrusci, A. Del Amo, F. Catalina, and M. Castillejo. "UV, visible and IR laser interaction with gelatine." Journal of Physics: Conference Series 59 (April 1, 2007): 571–74. http://dx.doi.org/10.1088/1742-6596/59/1/122.

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18

A.J.B. "Computer methods in UV, visible and IR spectroscopy." Journal of Molecular Structure 248, no. 1-2 (1991): 211–12. http://dx.doi.org/10.1016/0022-2860(91)85016-v.

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19

Alam, M. M., S. M. S. Islam, S. M. M. Rahman, and M. M. Rahman. "Simultaneous Preparation of Facial and Meridional Isomer of Cobalt-Amino Acid Complexes and their Characterization." Journal of Scientific Research 2, no. 1 (2009): 91–98. http://dx.doi.org/10.3329/jsr.v2i1.2032.

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Preparation and characterization of various complexes of cobalt (III)-amino acid system, especially cobalt (III) glycinato and cobalt (III) alaninato complexes are reported. The identification of the various isomers of these complexes is also reported. The various isomers are separated from their mixture by fractional crystallization. Each of these complexes has been characterized by observing physical characteristics, chemical analysis, UV-visible spectroscopy and IR-spectroscopy. The direct impact of geometry of the complexes to IR stretching frequencies and UV-visible spectral data of amino

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20

Eisenberg, I., H. Alpern, V. Gutkin, S. Yochelis, and Y. Paltiel. "Dual mode UV/visible-IR gallium-nitride light detector." Sensors and Actuators A: Physical 233 (September 2015): 26–31. http://dx.doi.org/10.1016/j.sna.2015.06.022.

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21

Galaup, J. P., J. Y. Harbec, R. Charneau, and H. Dubost. "IR-induced UV-visible fluorescence in matrix-isolated CO." Chemical Physics Letters 120, no. 2 (1985): 188–94. http://dx.doi.org/10.1016/0009-2614(85)87038-x.

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22

Burkholder, James B., A. R. Ravishankara, and Susan Solomon. "UV/visible and IR absorption cross sections of BrONO2." Journal of Geophysical Research 100, no. D8 (1995): 16793. http://dx.doi.org/10.1029/95jd01223.

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23

Zettler, J. Th, Th Trepk, L. Spanos, Y. Z. Hu, and W. Richter. "High precision UV-visible-near-IR Stokes vector spectroscopy." Thin Solid Films 234, no. 1-2 (1993): 402–7. http://dx.doi.org/10.1016/0040-6090(93)90295-z.

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24

Zhu, ShaoPing, Yuan Chen, Jun Sun, YuTing Yang, and ChuanJun Yue. "Synthesis, Characterization, Thermochromism, and Photochromism of Aromatic Aldehyde Hydrazone Derivatives." Journal of Chemistry 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/8460462.

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The Schiff bases N-(5-phenylthiazole-2-yl)-2-hydroxylnaphthaldehydehydrazone (1), N-(4′-chloro-5-phenylthiazole-2-yl)-2-hydroxylnaphthaldehydehydrazone (2), and N-(4′-nitro-5-phenylthiazole-2-yl)-2-hydroxylnaphthaldehydehydrazone (3) were synthesized. These compounds were characterized by using IR,1H NMR,13C NMR, and MS. The photochromism of the compounds was investigated by IR and UV-visible spectrometry which is time variable under irradiation of 254 nm UV light. The thermochromism of the compounds was studied using temperature-variable IR, UV-visible spectrometry, TG, and differential scann

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25

Rajeswari, R., and K. Jeyaprakash. "Bioactive potential analysis of brown seaweed Sargassum wightii using UV-VIS and FT-IR." Journal of Drug Delivery and Therapeutics 9, no. 1 (2019): 150–53. http://dx.doi.org/10.22270/jddt.v9i1.2199.

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The current study was investigated to explore the biogenic molecules of Sargassum wightii collected from the south east of Tamil Nadu, India. The biogenic molecules extracted from Sargassum wightii by using methanol as a solvent and the analysis was carried out by using UV-Visible spectroscopy and FT-IR. The UV-Visible spectrum of the methanolic extract of Sargassum wightii exposed the existence of the biogenic molecules separated from 200 - 1100 nm among the absorption. The incidence of peaks from 234-676 nm discovered the presence of flavonoids and its derivatives. The unprocessed methanolic

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26

Katsumata, Ken-ichi, Nobuhiro Matsushita, and Kiyoshi Okada. "Preparation of TiO2-Fullerene Composites and Their Photocatalytic Activity under Visible Light." International Journal of Photoenergy 2012 (2012): 1–9. http://dx.doi.org/10.1155/2012/256096.

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The development of visible light-sensitive photocatalytic materials is being investigated. In this study, the anatase and rutile-C60composites were prepared by solution process. The characterization of the samples was conducted by using XRD, UV-vis, FT-IR, Raman, and TEM. The photocatalytic activity of the samples was evaluated by the decolorization of the methylene blue. From the results of the Raman, FT-IR, and XRD, the existence of the C60was confirmed in the samples. The C60was modified on the anatase or rutile particle as a cluster. The C60didn't have the photocatalytic activity under UV

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27

Yang, Xiaoyang, Yuxin Min, Sibai Li, et al. "Conductive Nb-doped TiO2 thin films with whole visible absorption to degrade pollutants." Catalysis Science & Technology 8, no. 5 (2018): 1357–65. http://dx.doi.org/10.1039/c7cy02614e.

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28

Makvana, Chirag, Faruk Arodiya, and Kokila Parmar. "Green Synthesized Biogenic Silver Nanoparticles using Leaf Extract of Syzygium aqueum (Water Rose Apple) Functionalized by Polymer and their Antibacterial and Antioxidant Activities." Asian Journal of Chemistry 34, no. 12 (2022): 3251–56. http://dx.doi.org/10.14233/ajchem.2022.23992.

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In this work, silver nanoparticles (size ~8.75 nm) synthesized from the aqueous extract of Syzygium aqueum (water rose apple) leaves and were encapsulated in polyvinyl pyrrolidone (PVP). The biosynthesized PVP-silver nanoparticles were characterized by UV-visible, FT-IR, XRD, HR-TEM and SAED techniques. The UV-visible and FT-IR confirmed the successful encapsulation of PVP onto AgNPs. The morphology of PVP-AgNPs was derived by HR-TEM and SAED. As an antibacterial agent, synthesized AgNPs and PVP-AgNPs were tested against B. subtilis, S. aureus, S. typhi and E. coli, and proved to be effective

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29

Galaup, J. P., J. Y. Harbec, R. Charneau, and H. Dubost. "IR LASER-INDUCED UV-VISIBLE FLUORESCENCE IN MATRIX-ISOLATED CO." Le Journal de Physique Colloques 46, no. C7 (1985): C7–293—C7–298. http://dx.doi.org/10.1051/jphyscol:1985753.

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30

Popov, A. K. "Upconversion of IR radiation into the visible and UV ranges." Infrared Physics 25, no. 1-2 (1985): 21–27. http://dx.doi.org/10.1016/0020-0891(85)90051-x.

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31

Tian, Lihong, Jilian Xu, Michael Just, Michael Green, Lei Liu, and Xiaobo Chen. "Broad range energy absorption enabled by hydrogenated TiO2 nanosheets: from optical to infrared and microwave." Journal of Materials Chemistry C 5, no. 19 (2017): 4645–53. http://dx.doi.org/10.1039/c7tc01189j.

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Parrado, Concepción, Jimena Nicolas, Angeles Juarranz, and Salvador Gonzalez. "The role of the aqueous extract Polypodium leucotomos in photoprotection." Photochemical & Photobiological Sciences 19, no. 6 (2020): 831–43. http://dx.doi.org/10.1039/d0pp00124d.

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33

Huang, Sung-Chou, and Ching-Yao Lin. "Reductive electropolymerization of N-methyl-3-pyridylethynyl-porphyrins." Chemical Communications 51, no. 3 (2015): 519–21. http://dx.doi.org/10.1039/c4cc08157a.

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34

Kader, Thuraya A., and Basima M. Sarhan. "Synthesis and Spectro Scopic Study of Some Metal Transition Amino Organic Compounds with N-(2-OXO-1,2-Dihydropyrimidin-4-Ylcarbamothioyl) Acetamide (DPA)." Pakistan Journal of Medical and Health Sciences 16, no. 6 (2022): 543–47. http://dx.doi.org/10.53350/pjmhs22166543.

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A New ligand, N-(2-oxo-1,2- Dihydropyrimidin-4- ylcarbamothioyl) Acetamide (DPA) was prepared by reaction of iso thiosyanate derivative with Cytosine. The ligand has been characterized through elemental analysis, H1 NMR, C13NMR, FT-IR, and UV Visible spectra, such ligand’s transition metal complexes have been characterized through conductivity measurement, FT-IR, UV Visible spectra and magnetic susceptibility, all the complexes of this ligand are solid crystal and molar ratio (2:1) (ligand: metal). The form of molecular for these complexes octa hedral. The general formula [M(DPA)2Cl2], where M

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35

GHAMMAMY, SHAHRIAR, and SAJJAD SEDAGHAT. "Preparation and Characterization of the Schiff Base Ligand (E)- N-(3-nitrobenzylidene) isonicotinohydrazide and its Silver (I) Complex [Ag(NNBIH)2]+." Material Science Research India 9, no. 2 (2012): 191–95. http://dx.doi.org/10.13005/msri/090203.

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We describe the synthesis and characterization of a new silver (I) complex of the Schiff base ligand (E) - N-(3-nitrobenzylidene) is onicotinohydrazide that abbreviated as NNBIH was synthesized and characterized. Ag (I) Metal complex of this Schiff base ligand prepared by reaction of nitrate salt of Ag (I) with NNBIH. Characterization of the ligand was made by microanalyses, FT-IR, UV–Visible spectroscopy and its complex was made by microanalyses, FT-IR and UV–Visible spectroscopy. TG- DTA and other analytical methods have been applied to the investigation of the thermal behavior and Structure

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36

Trang, Ton Nu Quynh, Tieu Tu Doanh, Do Thanh Sinh, and Vu Thi Hanh Thu. "SrTiO3 nanocubes doped with ir as photocatalytic system for enhancing H2 generation from water splitting." Science and Technology Development Journal 23, no. 3 (2020): First. http://dx.doi.org/10.32508/stdj.v23i3.2403.

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Designing an effective photocatalyst for hydrogen (H2) performance under visible irradiation with a decrease the band gap energy of semiconductor has been considered as an essential aspect in boosting the performance of photocatalytic reactions. Herein, we focus on evaluating the role of doping with Ir into SrTiO3 structure fabricated by hydrothermal method for H2 generation. The crystalline characteristics the Ir-SrTiO3 photocatalyst were carried out via XRD and FE-SEM. The chemical composition and the optical properties of the Ir-SrTiO3 were classified by EDX and UV-Vis spectra, respectively

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37

Crowther, Jonathan. "Monochrome Camera Conversion: Effect on Sensitivity for Multispectral Imaging (Ultraviolet, Visible, and Infrared)." Journal of Imaging 8, no. 3 (2022): 54. http://dx.doi.org/10.3390/jimaging8030054.

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Conversion of standard cameras to enable them to capture images in the ultraviolet (UV) and infrared (IR) spectral regions has applications ranging from purely artistic to science and research. Taking the modification of the camera a step further and removing the color filter array (CFA) results in the formation of a monochrome camera. The spectral sensitivities of a range of cameras with different sensors which were converted to monochrome were measured and compared with standard multispectral camera conversions, with an emphasis on their behavior from the UV through to the IR regions.

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38

Ye, Tian-Qing, Caroline J. Arnold, David I. Pattison, et al. "Development of an Ultrafast Laser Apparatus for Time-Resolved UV-Visible and Infrared Spectroscopy." Applied Spectroscopy 50, no. 5 (1996): 597–607. http://dx.doi.org/10.1366/0003702963905998.

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An ultrafast laser apparatus has been developed that allows time-resolved UV-visible and infrared spectroscopy to be performed with a time resolution of 200 fs. The instrument design allows UV-vis and IR data to be collected either as spectra or as kinetic profiles. Solution flow and cell translation sampling systems have been developed that allow the handling of chemical and biochemical systems, including highly air-sensitive materials and volumes as small as 50 μL. The apparatus performance has been evaluated with the use of trans-stilbene in hexane (UV-vis) and silicon (IR) test samples, an

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39

Aruev P. N., Belik V. P., Blokhin A. A., et al. "In memoriam of E.M. Kruglov and V.V. Filimonov Quantum yield of an avalanche silicon photodiode in the 114-170 and 210-1100 nm wavelength ranges." Technical Physics Letters 48, no. 3 (2022): 3. http://dx.doi.org/10.21883/tpl.2022.03.52871.19026.

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An avalanche silicon photodiode has been developed for the near IR, visible, UV and VUV light ranges. The external quantum efficiency has been studied in the 114-170 and 210-1100 nm ranges. It has been demonstrated that the avalanche photodiode reaches the quantum yield of 29 to 9300 electrons/photon at the 160 nm wavelength and bias voltage of 190-303 V, respectively. Keywords: avalanche photodiode, vacuum ultraviolet, visible light range, near IR, silicon

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Jamil, Muhammad Tufiq, Javed Ahmad, Syed Hamad Bukhari, and Hammad Ahmad. "Optical phonons and its effect on physical properties of rare-earth orthoferrites RFeO3 (R = La, Nd, Gd, Dy, Er): IR reflectivity measurements." International Journal of Modern Physics B 32, no. 21 (2018): 1850229. http://dx.doi.org/10.1142/s0217979218502296.

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We have investigated the infrared reflectivity, UV-visible spectra and electrical property of polycrystalline RFeO3 (R = La, Nd, Gd, Dy, Er) synthesized by sol–gel method. Analysis of IR reflectivity spectra through Lorentz oscillator model has led to the observation of 14 IR active phonon modes out of 25 predicted modes. The results have been discussed in terms of different phonon bands related to the origin of atomic vibrations, which provides information about the structural evolution. The energy bandgap [Formula: see text]1.67–1.90 eV estimated from optical conductivity ([Formula: see text

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Steckl, Andrew. "(Electronics and Photonics Division Award) Let There be Light; Research at the Intersection of Electronics and Photonics." ECS Meeting Abstracts MA2022-01, no. 31 (2022): 1300. http://dx.doi.org/10.1149/ma2022-01311300mtgabs.

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Electronics and photonics have a long and successful history of combining to provide many devices and products that are at the heart of the modern technological world, ranging form solar cells to lasers to digital displays. In this presentation I will first give a brief historical overview of the interplay and interdependence of electronics and photonics. The properties and effects that are commonly exploited in opto/electronics fall primarily in two areas: (a) the effect of incident light (or more generally radiation) due to optical absorption/transmission/reflection and the conversion of pho

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Setiawan, Ely, Trisnowati Trisnowati, and Dadan Hermawan. "SINTESIS NATRIUM PENTAGAMAVUNONAT DAN UJI STABILITASNYA MENGGUNAKAN SPEKTROFOTOMETER UV-Visible." Molekul 1, no. 1 (2006): 24. http://dx.doi.org/10.20884/1.jm.2006.1.1.19.

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A research on the synthesis of sodium pentagamavunonat (Na-PGV-0) and its stability test using UV-Visible spectrophotometer were carried out. The synthesis of Na-PGV-0 carried out by reacting PGV-0 in tetrahydrofuran solvent refluxed with sodium ethoxide in mol comparison (1:2) for two hours. Structure elucidation by spectroscopic methods using UV-Visible, IR, 1H-NMR, 13C-NMR and stability test in water using UV-Visible spectrophotometer. The reaction yields 107,21 % (% w/w) products. A products was soluble in water and methanol. Structure elucidation results indicated that the formed compound

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Wang, Wen, Minglu Zhou, Luying Liang, Meijuan Lin, and Qidan Ling. "Synthesis and phosphorescent properties of the copolymers of N-vinylcarbazole, methyl methacrylate and iridium complex." Materials Science-Poland 32, no. 2 (2014): 206–13. http://dx.doi.org/10.2478/s13536-013-0170-0.

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AbstractThe copolymers containing carbazole unit and iridium complexes, such as (Ir(bpy)2Cl, Ir(mbpy)2Cl and Ir(Brbpy)2Cl, were synthesized via radical copolymerization of N-vinylcarbazole, methyl methacrylate and iridium complex. The synthesized copolymers were characterized by FT-IR, UV-Vis absorption spectroscopy and photoluminescence (PL) spectroscopy, respectively. According to the results, the copolymers (Ir(Brbpy)2Cl/PVK and Ir(mbpy)2Cl/PVK) exhibit yellow phosphorescence with an emission peak at around 553 nm under UV-visible light in the solid state. The results also reveal almost com

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Znamenskiĭ, M. Yu, Ya K. Lukashevich, A. F. Skochilov, and N. A. Fedulova. "Transmissive ruled diffraction gratings for the UV, visible, and IR regions." Journal of Optical Technology 81, no. 3 (2014): 151. http://dx.doi.org/10.1364/jot.81.000151.

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Balčytis, Armandas, Meguya Ryu, Xuewen Wang, et al. "Silk: Optical Properties over 12.6 Octaves THz-IR-Visible-UV Range." Materials 10, no. 4 (2017): 356. http://dx.doi.org/10.3390/ma10040356.

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Pichler, G., V. ivec, R. Beuc, et al. "UV, Visible and IR Spectrum of the Cs High Pressure Lamp." Physica Scripta T105, no. 1 (2003): 98. http://dx.doi.org/10.1238/physica.topical.105a00098.

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Fujita, Iwao, Mitsuharu Ishiguchi, Hiroshi Shiota, Takeshi Danjō, and Kouichi Kosai. "Spectroscopic study of polytoluidines in the UV-visible and IR regions." Journal of Applied Polymer Science 44, no. 6 (1992): 987–92. http://dx.doi.org/10.1002/app.1992.070440607.

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Do, Dang Van, Hoa Thi Thanh Duong, Khang Van An Doi, and Viet Minh Nguyen. "Synthesis of S doped TiO2 (S-TiO2) to enhance photocatalytic degradation of Ciprofloxacin in aqueous solutions under visible light." Vietnam Journal of Catalysis and Adsorption 10, no. 4 (2021): 114–19. http://dx.doi.org/10.51316/jca.2021.077.

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In this study, the sol-gel method was successfully used to synthesize S-TiO2 for efficient photocatalytic degradation of Ciprofloxacin solution under visible irradiation. These synthesized materials were characterized by various analytical methods such as XRD, SEM-EDX, FT-IR, and UV diffuse reflectance spectroscopy (DRS). XRD, SEM-EDX, and FT-IR confirmed the successful preparation of these materials. The UV-DSR demonstrated that the material has a lower bandgap in comparison with prime TiO2. The photodegradation results reported that the 0.33S-TiO2 had shown high efficiency in the degradation

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Illingworth, Garth D. "The Next Generation: An 8-16 M Space Telescope." Highlights of Astronomy 8 (1989): 449–53. http://dx.doi.org/10.1017/s1539299600008157.

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The Hubble Space Telescope is to be a long-lived observatory with wide-ranging spectroscopic and imaging capability in the UV and the visible, and in the near-IR as the second-generation instruments are implemented. HST will have a dramatic impact on our view of the universe. However, it is by no means premature to address the issue of its successor, even though HST has not yet been launched. We must look ahead with the realistic view that HST will degrade and will need to be replaced. The question that we must then address is:What is the UV-Visible-IR Observatory that will follow HST?I will m

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N, Thangaraj. "Investigation on Structural, Optical, and Thermal Properties of Graphene Oxide (GO) Nanoparticles." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, no. 04 (2024): 1–5. http://dx.doi.org/10.55041/ijsrem30191.

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The aim of the study , A nanoparticles of graphene oxide (GO) was synthesized by modified Hummer’s method. A new approach to synthesis graphene is oxidizing graphite powder with mixture with concentrated Sulphuric acid (H2SO4), Sodium Nitrate (Na NO3) and Potassium permanganate (KMnO4), Currently,an improved method for the preparation of graphene Oxide was most common one. The Graphene Oxide (GO) was characterized by X-Ray diffractration, FT-IR Spectroscopy, UV Visible Spectroscopy , Raman Spectroscopy and TGA analysis. The X-ray diffractration (XRD) results of Graphene oxide nanoparticles was

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