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Journal articles on the topic 'Blue green IR light'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Coe, Benjamin J., Madeleine Helliwell, Sergio Sánchez, Martyn K. Peers, and Nigel S. Scrutton. "Water-soluble Ir(iii) complexes of deprotonated N-methylbipyridinium ligands: fluorine-free blue emitters." Dalton Transactions 44, no. 35 (2015): 15420–23. http://dx.doi.org/10.1039/c5dt02591e.

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2

Wei, Wei, Jie Ma, Jonas Schaab, et al. "A Comparison between Triphenylmethyl and Triphenylsilyl Spirobifluorenyl Hosts: Synthesis, Photophysics and Performance in Phosphorescent Organic Light-Emitting Diodes." Molecules 28, no. 13 (2023): 5241. http://dx.doi.org/10.3390/molecules28135241.

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This study presents the synthesis and characterization of two spirobifluorenyl derivatives substituted with either triphenylmethyl (SB-C) or triphenylsilyl (SB-Si) moieties for use as host materials in phosphorescent organic light-emitting diodes (PHOLED). Both molecules have similar high triplet energies and large energy gaps. Blue Ir(tpz)3 and green Ir(ppy)3 phosphorescent devices were fabricated using these materials as hosts. Surprisingly, SB-Si demonstrated superior charge-transporting ability compared to SB-C, despite having similar energies for their valence orbitals. In particular, SB-

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3

Wu, Ruixia, Weiqiang Liu, Zhe Wang, Yang Feng, Jianling Zhao, and Liang Zhou. "Highly efficient solution-processed white organic light-emitting diodes based on a co-host system by controlling energy transfer among different emitters." Journal of Materials Chemistry C 10, no. 14 (2022): 5648–56. http://dx.doi.org/10.1039/d2tc00188h.

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Efficient solution-processed white organic light-emitting diodes with FIrpic, Ir(mppy)3 and (MDQ)2Ir(acac) as the blue, green and red emitters, respectively, were realized by employing TcTa and CzSi as hosts.

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4

Hong, A.-Ra, Joon Soo Han, Gumin Kang, Hyungduk Ko, and Ho Seong Jang. "Bright Blue, Green, and Red Luminescence from Dye-Sensitized Core@Shell Upconversion Nanophosphors under 800 nm Near-Infrared Light." Materials 13, no. 23 (2020): 5338. http://dx.doi.org/10.3390/ma13235338.

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In this study, Li-based blue- and green-emitting core@shell (C@S) upconversion nanophosphors (UCNPs) and NaGdF4-based red-emitting C@S UCNPs were synthesized, and IR-808 dyes were conjugated with the C@S UCNPs to enhance upconversion (UC) luminescence. The surface of the as-synthesized C@S UCNPs, which was originally capped with oleic acid, was modified with BF4− to conjugate the IR-808 dye having a carboxyl functional group to the surface of the UCNPs. After the conjugation with IR-808 dyes, absorbance of the UCNPs was significantly increased. As a result, dye-sensitized blue (B)-, green (G)-

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5

Wu, Li Shuang, and Hui Shan Yang. "White Organic Light-Emitting Devices Using the Blue and Green Fluorescent Emitting Layer Structure Incorporating with Red Phosphorescent Emitting Layer." Advanced Materials Research 753-755 (August 2013): 2521–25. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.2521.

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Efficient white organic light-emitting diodes are fabricated with the blue and green fluorescent incorporating red phosphorescent emitting layer. The blue, green and red emitting layer consist of 1,4-bis (2,2-diphenyl vinyl) benzene (DPVBi), tris (8-hydroxyquinoline) aluminium (Alq) and the bis (1-(phenyl) isoquinoline) iridium (III) acetylanetonate [Ir (piq)2(acac)] doped into 4,4(-N,N)-dicarbazole-biphenyl (CBP) host, respectively. The devices were made of ITO/ m-MTDATA (40 nm)/ NPB (10 nm) /DPVBi (8 nm)/ CBP: Ir (piq)2(acac) x% 5nm/ Alq (50 nm )/ LiF (1 nm) / Al (200 nm). The electrolumines

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ZOU Wen-jing, ZHAO Yu-kang, WU You-zhi, and ZHANG Cai-rong. "White Organic Light-emitting Devices Based on Phosphor-sensitized Fluorescence." Acta Physica Sinica 74, no. 2 (2025): 0. https://doi.org/10.7498/aps.74.20241294.

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Although phosphorescent organic light-emitting diodes can have 100% internal quantum efficiency (IQE), the IQE usually roll-off at high current densities due to triplet-triplet annihilation. Phosphor-sensitized fluorescence can realize the energy transfer between phosphorescent and fluorescent emitters, and can used to suppress the eﬃciency roll-oﬀ and tune the color of the device. Based on this consideration, white emission including different colors of phosphorescent and fluorescent emitters can be expected. Herein, Phosphor-sensitized fluorescent White organic light-emitting devices (WOLED)

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Lupashko, T. M., A. N. Tarashchan, K. O. Ilchenko, and E. E. Grechanovskaya. "CRYSTAL CHEMICAL FEATURES OF GREEN AND LIGHT-BLUE AMAZONITE AND GEOCHEMICAL ASPECTS OF THEIR FORMATION PROCESSES." Mineralogical Journal 45, no. 1 (2023): 21–40. http://dx.doi.org/10.15407/mineraljournal.45.01.021.

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A study was carried out in order to identify the aspects of geochemical processes occurring during the formation of green and light-blue amazonite crystals. Green, light-blue and greenish-blue amazonites from rare-metals deposits of Ukraine (Perzhanske, Ukrainian Shield), rf (Gora Parusna, Ploskogirske, Kola Peninsula; Orlovske, Western Transbaikalia), and USA (Rutherford, Virginia) were investigated using X-ray luminescence (XRL), infrared (IR) spectroscopy and X-ray diffraction. The rock-forming microcline from the Perzhanske, Orlovske and Katuginske (rf) deposits was also studied. It was fo

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8

Bakratsas, Georgios, Christoforos Tsoumanis, Haralambos Stamatis, and Petros Katapodis. "Exopolysaccharide Production in Submerged Fermentation of Pleurotus ostreatus under Red and Green Light." Fermentation 10, no. 6 (2024): 313. http://dx.doi.org/10.3390/fermentation10060313.

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Light controls the developmental, physiological, morphological, and metabolic responses of many fungi. Most fungi respond primarily to blue, red, and green light through their respective photoreceptors. In this study, a screening of different light wavelengths’ effects on submerged Pleurotus ostreatus cultivation in baffled flasks was conducted. P. ostreatus growth was not inhibited in all tested conditions, while an equal or higher protein content was observed in comparison with dark conditions. Red and green light favored exopolysaccharide (EPS) production while red and blue light favored in

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9

Dong, Biao, Hongwei Song, Ruifei Qin, et al. "Upconversion White Light Devices: Ln3+-Tridoped NaYF4 Nanoparticles and PVP Modified Films." Journal of Nanoscience and Nanotechnology 8, no. 8 (2008): 3921–25. http://dx.doi.org/10.1166/jnn.2008.182.

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Upconversion (UC) white light hybrid thin films containing Ln3+-tridoped (Yb3+, Er3+ and Tm3+) NaYF4 nanoparticles and poly(vinyl pyrrolidone) (PVP, Mw ≈ 1300 000) were prepared by a spin-coating method and characterized by X-ray diffraction (XRD), field emission scanning electron micrograph (FE-SEM) and Fourier transform infrared spectra (FT-IR). White light was generated by two different lanthanide ions, Er3+ (red and green) and Tm3+ (blue) under excitation by a 980-nm laser diode. Due to the modification of PVP to the UC populating processes, the color stability of the white light in the hy

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Alipour, Shohreh, Sara Kalari, Mohammad Hossein Morowvat, Zahra Sabahi, and Ali Dehshahri. "Green Synthesis of Selenium Nanoparticles by Cyanobacterium Spirulina platensis (abdf2224): Cultivation Condition Quality Controls." BioMed Research International 2021 (May 29, 2021): 1–11. http://dx.doi.org/10.1155/2021/6635297.

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Selenium nanoparticles (SeNPs) are well-known bioactive compounds. Various chemical and biological methods have been applied to SeNP synthesis. Spirulina platensis is a widely used blue-green microalgae in various industries. In this study, the biosynthesis of SeNPs using sodium selenite and Spirulina platens has been developed. The SeNP synthesis was performed at different cultivation condition including pH and illumination schedule variation. The SeNPs were characterized by FT-IR, XRD, size, and zeta potential measurements, and the antioxidant activities of selected SeNPs were evaluated by D

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Inden, Tomoya, Tomoya Hishida, Masayuki Takahashi, Masato Ohsumi, and Naoki Ohtani. "White Organic Light-Emitting Diodes Using Two Phosphorescence Materials in a Starburst Hole-Transporting Layer." International Journal of Photoenergy 2012 (2012): 1–7. http://dx.doi.org/10.1155/2012/703496.

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We fabricated two kinds of white organic light-emitting diodes (WOLEDs); one consisted of two emissive materials of red and blue, and the other of three emissive materials of red, green, and blue. The red and blue emissive materials were phosphorescent. We evaluated the thickness dependence of the CIE coordinate, the external quantum efficiency (EQE), and the luminance by changing the thicknesses of the Ir(btp)2acac and FIrpic layers. Samples consisting of three emissive materials revealed the best CIE coordinate and the best EQE in the same sample structure. On the other hand, the samples con

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12

Lalevée, Jacques, Sofia Telitel, Pu Xiao, et al. "Metal and metal-free photocatalysts: mechanistic approach and application as photoinitiators of photopolymerization." Beilstein Journal of Organic Chemistry 10 (April 15, 2014): 863–76. http://dx.doi.org/10.3762/bjoc.10.83.

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In the present paper, the photoredox catalysis is presented as a unique approach in the field of photoinitiators of polymerization. The principal photocatalysts already reported as well as the typical oxidation and reduction agents used in both reductive or oxidative cycles are gathered. The chemical mechanisms associated with various systems are also given. As compared to classical iridium-based photocatalysts which are mainly active upon blue light irradiation, a new photocatalyst Ir(piq)2(tmd) (also known as bis(1-phenylisoquinolinato-N,C 2’)iridium(2,2,6,6-tetramethyl-3,5-heptanedionate) i

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13

Shi, Chun-hui, Xiao-qing Wang, Xue-ying Zhang, Lian-ying Shen, Jun Luo, and Yu-xing Zhang. "Response of Fruit Bagging to Lignin Biosynthesis and Expression of Related Genes in Fruit Peel of Sand Pear (Pyrus pyrifolia Nakai) cv. Cuiguan." HortScience 54, no. 11 (2019): 1989–97. http://dx.doi.org/10.21273/hortsci14382-19.

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This study explored the effects of different colored bags (blue, green, white, yellow, orange, and red) on russet deposition on the peel of semi-russet ‘Cuiguan’ pears 10 days after full bloom (DAFB). The process of russeting of the peel and structure of the cork layer were characterized by microscopy and scanning electron microscopy (SEM), followed by the detection of lignin and the activity of enzymes involved in lignin synthesis. The expression of cinnamate-4-hydroxylase, 4-coumarate:coenzyme A ligase, cinnamyl alcohol dehydrogenase, cinnamoyl-CoA reductase, and peroxidase, which were relat

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14

Aslam, Arfa, Haq N. Bhatti, Shumaila Fatima, et al. "Kinetics of acid blue 40 dye degradation under solar light in the presence of CuO nanoparticles synthesized using Citrullus lanatus seeds extract." Zeitschrift für Physikalische Chemie 236, no. 4 (2022): 583–94. http://dx.doi.org/10.1515/zpch-2021-3076.

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Abstract In view of eco-benign nature of green synthesis, in the present investigation, the CuO NPs are prepared using Citrullus lanatus seeds extract and photocatalytic degradation efficiency for Acid Blue 40 (AB-40) was evaluated. The CuO NPs were characterized by XRD (X-ray diffraction), SEM (scanning electron microscopy), EDX (energy dispersive X-ray), and FT-IR (Fourier transform infrared) techniques. The synthesized CuO NPs was in face centered monoclinic crystalline form with particle size in 40–60 nm range. The photocatalytic degradation potential of CuO NPs was assessed for acid blue

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15

Huo, Xinzhu, Yuxuan He, Shiqi Ma, et al. "Green Synthesis of Carbon Dots from Grapefruit and Its Fluorescence Enhancement." Journal of Nanomaterials 2020 (June 29, 2020): 1–7. http://dx.doi.org/10.1155/2020/8601307.

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In this study, undoped carbon quantum dots (UCQDs, UCQDs-peel) and N-doped carbon dots (NCQDs) were prepared by a facile one-pot environmentally friendly hydrothermal method using grapefruit as carbon sources in the absence and presence of area, respectively. The structure, morphology, and fluorescence properties of three samples were characterized by Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), and photoluminescence (PL). It was found that three types of CQDs could emit blue fluorescence with different intensities when irradiated with ultraviolet li

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Mergola, Lucia, Luigi Carbone, Tiziana Stomeo, and Roberta Del Sole. "Green Synthesis of Iridium Nanoparticles from Winery Waste and Their Catalytic Effectiveness in Water Decontamination." Materials 16, no. 5 (2023): 2060. http://dx.doi.org/10.3390/ma16052060.

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An environmentally friendly procedure was adopted for the first time to prepare green iridium nanoparticles starting from grape marc extracts. Grape marcs, waste of Negramaro winery production, were subjected to aqueous thermal extraction at different temperatures (45, 65, 80, and 100 °C) and characterized in terms of total phenolic contents, reducing sugars, and antioxidant activity. The results obtained showed an important effect of temperature with higher amounts of polyphenols and reducing sugars and antioxidant activity in the extracts with the increase of temperature. All four extracts w

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17

Han, Lu, Yong Luo Qiao, Wei Qiang Zhou, Liang Shen, and Jing Kun Xu. "The Electrosynthesis and Characterization of Thienyl-Group-Bearing Acrylic Polymer as Precursor for Electrochemical Reaction of Thiophene Side-Chain." Advanced Materials Research 1053 (October 2014): 245–51. http://dx.doi.org/10.4028/www.scientific.net/amr.1053.245.

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The precursor thienyl-group-bearing acrylic polymer (TE-PAA-co-PMMA), obtained with 3-Ethyl acrylate-thiophene (TE-AA) and methyl methacrylate through free radical polymerization, was prepared electrochemically to free-standing, processible and conducting conjugated PTE-PAA-co-PMMA film by direct anodic oxidation in CH2Cl2 containing 50% boron trifluoride diethyl etherate (BFEE). The structure, electrochemical, optical, thermal properties and morphology of as-formed electropolymer were systematically investigated by FT-IR, cyclic voltammetry, UV-vis, thermogravimetry and scanning electron micr

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Rajesh Yadav, M., Ch Rajyalakshmi, V. L. N. Balaji Gupta T, G. V. Lakshmikanth, and R. V. S. S. N. Ravikumar. "Evaluating the Effects of Vanadium- infused CaBP Nanophosphors: Insights into structural Morphological and Photoluminescent studies." Journal of Physics: Conference Series 2779, no. 1 (2024): 012075. http://dx.doi.org/10.1088/1742-6596/2779/1/012075.

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Abstract Due to their potential for use in numerous applications, including displays, medical imaging, lighting, and fluorescent lamps, phosphor luminescent materials especially those activated with transition metal ions— intensive research has been conducted over the last decade on these topics. Present document describes a report on the solid-state reaction method has been used to prepare nanophosphors of Ca6BP5O20:xVO2+ (x=0.01,0.03 & 0.05 mol%) and to examine the effects of vanadyl doping on structural and morphological studies using X-ray diffraction (XRD), field emission scanning ele

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KIM, WON SAM, JONG HAN LIM, BURM-JONG LEE, YUNGHEE OH та YOUNG-SOO KWON. "SYNTHESIS AND ELECTROLUMINESCENT PROPERTY OF ALUMINUM AND α-PYRIDOIN COMPLEX". Journal of Nonlinear Optical Physics & Materials 14, № 04 (2005): 505–12. http://dx.doi.org/10.1142/s0218863505002955.

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A novel light-emitting aluminum complex (PAl) containing the dihydroxy derivative of trans-1,2-dipyridylethene, α-pyridoin, was synthesized and its electroluminescent (EL) properties characterized. The chemical structure of the complex was elucidated by FT-IR, UV-Vis and XPS. The complex showed thermal stability up to 350°C under nitrogen flow by TGA. The photoluminescence (PL) was measured from PAl cast film on quartz plate. Electroluminescent device having the structure of ITO/TPD/PAl/Al was fabricated by vacuum deposition, where N,N-bis(3-methylphenyl)-N,N′-diphenylbenzidine (TPD) was used

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Hussain, Nedal. "synthesis of zinc oxide nanoparticles using cumin and Curcuma, and its application towards photocatalytic degradation." Mustansiriyah Journal of Pure and Applied Sciences 3, no. 3 (2025): 18–28. https://doi.org/10.47831/mjpas.v3i3.283.

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Zinc oxide nanoparticles (ZnO NPs) were successfully synthesized by a green method using cumin and Curcuma and zinc acetate dihydrate [Zn (CH3COO)2. 2H2O]as salt precursors . The particle size and phase structure of zinc oxide were determined by X-ray diffraction, high-resolution transmission electron microscopy and field emission scanning electron microscopy. The produced zinc oxide nano particles are crystalline with a grain size of 24–50 nm. Energy Dispersive Spectrum (EDX) results affect the composition of Zinc and Oxygen, giving high energy signals of 76.9.4% and 23.1% for Oxygen and zinc

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Kaya, İsmet, Feyza Kolcu, Sabriye Satilmiş, and Zeynep Yazicioglu. "Synthesis and characterization of fluorescent polyphenols anchored Schiff bases via oxidative polycondensation." Materials Science-Poland 36, no. 4 (2018): 584–96. http://dx.doi.org/10.2478/msp-2018-0070.

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AbstractA series of polyimines, bearing phenolic groups were successfully synthesized in aqueous alkaline solution via chemical oxidative polycondensation. Polymeric Schiff bases were synthesized by condensation of 2,4-dihydroxybenzaldehyde and 3-hydroxy-4-metoxybenzaldehyde with 2-aminophenol and 3-aminophenol. The molecular structures of the synthesized Schiff bases and their corresponding polymers were studied by FT-IR, UV-Vis, 1H-NMR and 13C-NMR spectroscopic methods. Thermal stability of the imine polymers was evidenced by their initial degradation temperatures found in the range of 170 °

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Senthilnathan, Anoja, D. M. S. N. Dissanayake, G. T. D. Chandrakumara, et al. "Akaganeite nanorices deposited muscovite mica surfaces as sunlight active green photocatalyst." Royal Society Open Science 6, no. 3 (2019): 182212. http://dx.doi.org/10.1098/rsos.182212.

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Thin films of akaganeite [FeO(OH)] nanorices deposited muscovite mica (ANPM) surfaces are synthesized using the facile urea assisted controlled self-assembly technique. The synthesized materials are characterized using scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy, atomic force microscopy, X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy and thermogravimetric analysis (TGA). The prepared nanorices on mica surfaces show average particle length and width of 200 and 50 nm, respectively. Synthesized material acts as an efficient photocatalyst

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Gautam, Prakalp, Shahnawaz, Iram Siddiqui, et al. "Bifunctional Bicarbazole-Benzophenone-Based Twisted Donor–Acceptor–Donor Derivatives for Deep-Blue and Green OLEDs." Nanomaterials 13, no. 8 (2023): 1408. http://dx.doi.org/10.3390/nano13081408.

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Organic light-emitting diodes (OLEDs) have played a vital role in showing tremendous technological advancements for a better lifestyle, due to their display and lighting technologies in smartphones, tablets, television, and automotive industries. Undoubtedly, OLED is a mainstream technology and, inspired by its advancements, we have designed and synthesized the bicarbazole-benzophenone-based twisted donor–acceptor–donor (D-A-D) derivatives, namely DB13, DB24, DB34, and DB43, as bi-functional materials. These materials possess high decomposition temperatures (>360 °C) and glass transition te

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Yun, Jun-Seok, Seon-Hoo Park, and Seok Bong Yoo. "Infusion-Net: Inter- and Intra-Weighted Cross-Fusion Network for Multispectral Object Detection." Mathematics 10, no. 21 (2022): 3966. http://dx.doi.org/10.3390/math10213966.

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Object recognition is conducted using red, green, and blue (RGB) images in object recognition studies. However, RGB images in low-light environments or environments where other objects occlude the target objects cause poor object recognition performance. In contrast, infrared (IR) images provide acceptable object recognition performance in these environments because they detect IR waves rather than visible illumination. In this paper, we propose an inter- and intra-weighted cross-fusion network (Infusion-Net), which improves object recognition performance by combining the strengths of the RGB-

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Fouda, Amr, Ebrahim Saied, Ahmed M. Eid, et al. "Green Synthesis of Zinc Oxide Nanoparticles Using an Aqueous Extract of Punica granatum for Antimicrobial and Catalytic Activity." Journal of Functional Biomaterials 14, no. 4 (2023): 205. http://dx.doi.org/10.3390/jfb14040205.

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The peel aqueous extract of Punica granatum was utilized to fabricate zinc oxide nanoparticles (ZnO-NPs) as a green approach. The synthesized NPs were characterized by UV-Vis spectroscopy, Fourier transform infrared (FT-IR), X-ray diffraction (XRD), transmission electron microscopy (TEM), and scanning electron microscopy, which was attached to an energy dispersive X-ray (SEM-EDX). Spherical, well arranged, and crystallographic structures of ZnO-NPs were formed with sizes of 10–45 nm. The biological activities of ZnO-NPs, including antimicrobial and catalytic activity for methylene blue dye, we

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Jeong, Min Su, Seong In Jeong, Seon Jong Kang, Kyung Bong Ryu, and Kang Ryoung Park. "OADE-Net: Original and Attention-Guided DenseNet-Based Ensemble Network for Person Re-Identification Using Infrared Light Images." Mathematics 10, no. 19 (2022): 3503. http://dx.doi.org/10.3390/math10193503.

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Recently, research on the methods that use images captured during day and night times has been actively conducted in the field of person re-identification (ReID). In particular, ReID has been increasingly performed using infrared (IR) images captured at night and red-green-blue (RGB) images, in addition to ReID, which only uses RGB images captured during the daytime. However, insufficient research has been conducted on ReID that only uses IR images because their color and texture information cannot be identified easily. This study thus proposes an original and attention-guided DenseNet-based e

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Alharthi, Fahad A., Abdulaziz Ali Alghamdi, Asma A. Alothman, Zainab M. Almarhoon, Munairah F. Alsulaiman, and Nabil Al-Zaqri. "Green Synthesis of ZnO Nanostructures Using Salvadora Persica Leaf Extract: Applications for Photocatalytic Degradation of Methylene Blue Dye." Crystals 10, no. 6 (2020): 441. http://dx.doi.org/10.3390/cryst10060441.

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Various ZnO nanomaterials such as nanorods, nanoparticles, and nanosheets were synthesized using Salvadora persica leaf extract via the sol–gel method. The prepared nanomaterials possess a large number of nanocavities. The synthesized nanomaterials were characterized using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), UV-visible diffuse reflectance studies (UV-DRS), scanning electron microscopy (SEM), and high resolution transmission electron microscopy (HT-TEM), and these nanomaterials were used to test photocatalytic applications for the degradation of highly haza

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Shah, Ami Ansul, D. Jayalakshmi, and Belina Xavier. "Impact of Spherical Gold Nanoparticles from Phyllanthus emblica (Indian Gooseberry) Fruit Extract on the Photocatalytic Reduction of Methylene Blue Dye." Asian Journal of Chemistry 31, no. 11 (2019): 2613–17. http://dx.doi.org/10.14233/ajchem.2019.22255.

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In present study, gold nanoparticles are synthesized using the aqueous fruit extract of Phyllanthus emblica (Indian gooseberry) via the green synthesis route. The biomolecules such as phenols, ascorbic acid, flavanols and tannins play an important role in the reduction of the metal ions as investigated by FT-IR studies. The UV-visible spectroscopy studies confirm the surface plasmon resonance peaks in the range of 532-550 nm and is characteristic of the colour change from pale yellow to pinkish-purple. The TEM analysis exhibits the spherical gold nanoparticles in the range of 10-50 nm. The zet

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Cios, Aleksandra, Martyna Ciepielak, Łukasz Szymański, et al. "Effect of Different Wavelengths of Laser Irradiation on the Skin Cells." International Journal of Molecular Sciences 22, no. 5 (2021): 2437. http://dx.doi.org/10.3390/ijms22052437.

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The invention of systems enabling the emission of waves of a certain length and intensity has revolutionized many areas of life, including medicine. Currently, the use of devices emitting laser light is not only an indispensable but also a necessary element of many diagnostic procedures. It also contributed to the development of new techniques for the treatment of diseases that are difficult to heal. The use of lasers in industry and medicine may be associated with a higher incidence of excessive radiation exposure, which can lead to injury to the body. The most exposed to laser irradiation is

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Han, Sangjin, Donggeun Roh, Junyung Park, and Hangsik Shin. "Design of Multi-Wavelength Optical Sensor Module for Depth-Dependent Photoplethysmography." Sensors 19, no. 24 (2019): 5441. http://dx.doi.org/10.3390/s19245441.

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The multi-wavelength photoplethysmography sensors were introduced to measure depth-dependent blood volume based on that concept that the longer the light wavelength, the deeper the penetration depth near visible spectrum band. In this study, we propose an omnidirectional optical sensor module that can measure photoplethysmogram while using multiple wavelengths, and describe implementation detail. The developed sensor is manufactured by making a hole in a metal plate and mounting an LED therein, and it has four wavelength LEDs of blue (460 nm), green (530 nm), red (660 nm), and IR (940 nm), bei

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Hameed, Hajra, Abdul Waheed, Muhammad Shakeeb Sharif, et al. "Green Synthesis of Zinc Oxide (ZnO) Nanoparticles from Green Algae and Their Assessment in Various Biological Applications." Micromachines 14, no. 5 (2023): 928. http://dx.doi.org/10.3390/mi14050928.

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The biosynthesis of algal-based zinc oxide (ZnO) nanoparticles has shown several advantages over traditional physico-chemical methods, such as lower cost, less toxicity, and greater sustainability. In the current study, bioactive molecules present in Spirogyra hyalina extract were exploited for the biofabrication and capping of ZnO NPs, using zinc acetate dihydrate and zinc nitrate hexahydrate as precursors. The newly biosynthesized ZnO NPs were characterized for structural and optical changes through UV-Vis spectroscopy, Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD)

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Wu, Yansong, Wei Ding, and Jian Li. "Fabrication of Hierarchical Nanocomposites through a Nature-Mimic Method: Depositing MoS2 Nanoparticles on Carbon Nitride Nanotubes by Polydopamine Coating." Journal of Nanomaterials 2021 (May 19, 2021): 1–11. http://dx.doi.org/10.1155/2021/6668393.

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The combination of 1D nanotubes with 0D nanoparticles to integrate a nanocomposite structure has attracted increasing research interest, while the interfacial interaction plays an important role in such composites. This paper presents a facile and universal approach for the fabrication of hierarchical NP-NT nanocomposites with improved photocatalytic performances by mussel chemistry. Polydopamine (PDA) serves as the biomimetic adhesive layer and then connects MoS2 nanoparticles with g-C3N4 nanotubes (CNNTs). The obtained nanocomposites were characterized by FT-IR spectra, XRD, SEM, TEM, XPS, U

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Blazevicius, Dovydas, Daiva Tavgeniene, Simona Sutkuviene, et al. "Pyridinyl-Carbazole Fragments Containing Host Materials for Efficient Green and Blue Phosphorescent OLEDs." Molecules 26, no. 15 (2021): 4615. http://dx.doi.org/10.3390/molecules26154615.

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Pyridinyl-carbazole fragments containing low molar mass compounds as host derivatives H1 and H2 were synthesized, investigated, and used for the preparation of electro-phosphorescent organic light-emitting devices (PhOLEDs). The materials demonstrated high stability against thermal decomposition with the decomposition temperatures of 361–386 °C and were suitable for the preparation of thin amorphous and homogeneous layers with very high values of glass transition temperatures of 127–139 °C. It was determined that triplet energy values of the derivatives are, correspondingly, 2.82 eV for the de

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Fouda, Amr, Mohamed A. Awad, Zarraq E. AL-Faifi, et al. "Aspergillus flavus-Mediated Green Synthesis of Silver Nanoparticles and Evaluation of Their Antibacterial, Anti-Candida, Acaricides, and Photocatalytic Activities." Catalysts 12, no. 5 (2022): 462. http://dx.doi.org/10.3390/catal12050462.

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Aspergillus flavus F5 was used to reduce AgNO3 to form silver nanoparticles (Ag-NPs) that were monitored by a color change from colorless to yellowish-brown. The characterizations were achieved by UV-Vis spectroscopy, FT-IR, TEM, SEM-EDX, and XRD. Data showed that there was a successful formation of crystalline, spherical shape Ag-NPs with a particle average size of 12.5 ± 5.1 nm. The FT-IR clarified the role of various functional groups in the reducing/capping process. EDX-SEM revealed that the main component of the as-formed sample was set to be mainly Ag with a weight percentage of 46.1%. T

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Kim, Beomjin, Woo Chang Song, Sun Young Park, and Geuntae Park. "Green Synthesis of Silver and Gold Nanoparticles via Sargassum serratifolium Extract for Catalytic Reduction of Organic Dyes." Catalysts 11, no. 3 (2021): 347. http://dx.doi.org/10.3390/catal11030347.

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The green synthesis of inorganic nanoparticles (NPs) using bio-materials has attained enormous attention in recent years due to its simple, eco-friendly, low-cost and non-toxic nature. In this work, silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) were synthesized by the marine algae extract, Sargassum serratifolium (SS). The characteristic studies of bio-synthesized SS-AgNPs and SS-AuNPs were carried out by using ultraviolet–visible (UV–Vis) absorption spectroscopy, dynamic light scattering (DLS), high-resolution transmission electron microscope (HR-TEM), selected area electron dif

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Onoda, Hiroaki, and Ryota Sasaki. "Preparation of Novel Copper Iron Lazulite Imitated Phosphate Pigments." Key Engineering Materials 927 (July 29, 2022): 125–30. http://dx.doi.org/10.4028/p-cg9kx9.

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In recent years, the use of hazardous heavy metals has been banned all over the world, and the development of alternative materials is required. As for inorganic pigments, heavy metals have been used so far, but there is an urgent need for development of inorganic pigments that do not use these. In this work, novel phosphate pigments imitated natural ore were prepared from copper, iron, aluminum nitrate solutions, ascorbic acid, and phosphoric acid at pH 5. The obtained precipitates were heated at 300 and 500oC for 1 hour. The precipitates and their thermal products were estimated with X-ray d

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Aleksic, Jelena, Tanja Barudzija, Miodrag Mitric, Marko Boskovic, Zoran Ristic, and Ljiljana Kostic. "Structural, magnetic and up-conversion properties of YF3: Yb/Ln (Ln = Er, Tm, Ho) solid solutions." Facta universitatis - series: Physics, Chemistry and Technology 18, no. 2 (2020): 119–29. http://dx.doi.org/10.2298/fupct2002119a.

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In this paper, we investigated YF3: Yb/Er, YF3: Yb/Tm, and YF3: Yb/Ho solid solutions prepared by reaction of an appropriate amount of oxides with ammonium difluoride (NH4HF2) as a fluorinating agent. These samples were characterized by Xray diffraction (XRD), magnetic measurements, and up-conversion (UC) photoluminescence spectra. The results show that all samples are single-phase and crystallize in an orthorhombic crystal structure of the ?-YF3 structure type. Above 100 K, the measured molar magnetic susceptibility was fitted by the Curie-Weiss law and the average effective magnetic moments

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Thippeswamy, B., P. A. Suchetan, G. R. Vijayakumar, B. Somashekara, and I. Mallikarjuna. "Synthesis, Structural Characterization and Photophysical Properties of Bis(4′-chloro-2,2′:6′,2″-terpyridyl)nickel(II)chloride Dihydrate." Asian Journal of Chemistry 36, no. 3 (2024): 571–78. http://dx.doi.org/10.14233/ajchem.2024.30843.

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Nickel(II) complex viz. bis(4′-chloro-2,2′:6′,2″-terpyridyl)nickel(II)chloride dihydrate, [Ni(Cltpy)2]Cl2·2H2O where Cltpy is a tridentate ligand was synthesized under mild conditions by conventional method. The octahedral geometry of nickel(II) complex was revealed by single crystal X-ray diffraction (SCXRD) studies. The synthesized Ni(II) complex was characterized by Fourier transform-infrared (FT-IR), elemental analysis, scanning electron microscope (SEM), thermal analysis (TG-DTA), photoluminescence (PL) and diffuse reflectance (DR) spectra. A prominent peak at 630 nm was recorded in the D

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Dwivedi, Poonam, Honey Satiya, and Indu Jatrana. "Green and Facile Approach for the Synthesis of ZnO/MgO Nanocomposite using Azadirachta indica Leaf Extract: Characterization and Photocatalytic Activity." Research Journal of Chemistry and Environment 27, no. 6 (2023): 51–57. http://dx.doi.org/10.25303/2706rjce051057.

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In this study, biomolecules of the aqueous leaf extract of Azadirachta indica were used as a green catalyst for the synthesis of bimetallic- ZnO/MgO nanocomposites (ZM NCs). The function of biomolecules for the fabrication of biosynthesized ZM NCs was studied by FT-IR spectroscopy while the existence of both MgO and ZnO in ZM NCs was confirmed by SEM and TEM micrographs. Results of EDX spectroscopy with element mapping revealed the homogenous distribution of magnesium and zinc in the as-prepared nanocomposites. Powder XRD analysis reflects the polycrystalline nature of NCs with crystallite siz

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Li, Kuiju, Kezhu Han, Gele Teri, et al. "A Study on the Materials Used in Ancient Wooden Architectural Paintings at DaZhong Gate in Confucius Temple, Qufu, Shandong, China." Materials 17, no. 9 (2024): 2170. http://dx.doi.org/10.3390/ma17092170.

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This study analyzes the pigments and binders used in the painted wooden structure of DaZhong Gate in the Confucius Temple in Qufu, Shandong Province, China. Five samples were collected from the building and analyzed using techniques such as polarized light microscopy (PLM), energy-dispersive X-ray spectroscopy (EDX), micro-Raman spectroscopy (m-RS), and Fourier-transform infrared spectroscopy (FT-IR). The findings reveal that the red, yellow, green, and blue pigments are identified as lead red, lead chromate yellow, emerald green, and ultramarine, respectively. The white pigment is determined

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Vitale, Ermenegilda, Luigi Gennaro Izzo, Chiara Amitrano, et al. "Light Quality Modulates Photosynthesis and Antioxidant Properties of B. vulgaris L. Plants from Seeds Irradiated with High-Energy Heavy Ions: Implications for Cultivation in Space." Plants 11, no. 14 (2022): 1816. http://dx.doi.org/10.3390/plants11141816.

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Beta vulgaris L. is a crop selected for cultivation in Space for its nutritional properties. However, exposure to ionizing radiation (IR) can alter plant photosynthetic performance and phytochemical production in the extraterrestrial environment. This study investigated if plant growth under different light quality regimes (FL—white fluorescent; RGB—red–green–blue; RB—red–blue) modifies the photosynthetic behavior and bioactive compound synthesis of plants sprouted by dry seeds irradiated with carbon or titanium high-energy ions. The study evidenced that: (i) the plant response depends on the

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Madhu, R., K. Pruthviraj, S. Sreenivasa, D. Suresh, B. E. K. Swamy, and M. S. Prakash. "Biogenic Synthesis, Characterization of Cerium Oxide Nano Particles using <i>Perioria pinnatum</i> Leaf Extract and Its Applications." Journal of Scientific Research 15, no. 3 (2023): 831–43. http://dx.doi.org/10.3329/jsr.v15i3.64001.

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The biogenic method of synthesis of metal oxide nanoparticles is the recent advances development in nanotechnology, and cerium oxide (CeO2) nanoparticles (NPs), in particular, are advantageous due to their remarkable properties. In this report, we discuss the results of Cerium oxide NPs synthesized by solution-combustion method using “Perioria pinnatum” leaf extract as a reducing and stabilizing agent. The structurally spherical shaped CeO2 NPs with 12 nm crystal size were synthesized and further characterized by powder X-ray diffraction analysis (PXRD), Fourier transforms infrared spectroscop

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Zahedi Asl, Saeid, and Fahimeh Hooriabad Saboor. "Enhanced methyl green adsorption of ZIF-8 metal-organic framework: Insights from different solvents." Synthesis and Sintering 4, no. 3 (2024): 219–25. http://dx.doi.org/10.53063/synsint.2024.43244.

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This study investigates the effect of solvent type on the structural properties and adsorption performance of the ZIF-8 metal-organic framework for removing various dyes including, methyl green (MG), methylene blue (MB), and methyl orange (MO) from water in acidic and alkaline environments. ZIF-8 samples were synthesized using zinc nitrate, methylimidazole, and three different solvents including, water, methanol, and ethanol under atmospheric pressure and 70 °C. Characterization using BET, XRD, FT-IR, and TGA techniques sheds light on the structural, chemical, and thermal properties of ZIF-8 s

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Muthukumaran, M., G. Dhinagaran, V. Narayanan, et al. "Enhanced Photocatalytic Behavior of (GO/Cu2O) Composite with Cu2O Being Synthesized Through Green Route." Journal of Nanoscience and Nanotechnology 19, no. 11 (2019): 7215–20. http://dx.doi.org/10.1166/jnn.2019.16671.

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Graphene oxide/Cuprous oxide (GO/Cu2O) composite is a visible light photocatalyst for the degradation of dyes. A simple and efficient approach for preparing GO/Cu2O composite adopted in this study involves reducing cuprous oxide precursors in the presence of graphene oxide using an aqueous solution of pulp derived from banana fruit. The GO/Cu2O composite was characterized by Fourier transform infrared spectroscopy (FT-IR), Diffused reflectance Ultraviolet visible spectroscopy (DRS UV-Vis), Raman spectroscopy and Field Emission Scanning electron microscopy (FE-SEM). Cu2O particles were distribu

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Shah, Ami Ansul, Belina Xavier, and D. Jayalakshmi. "Preparation of Spherical Gold Nanoparticles Capped by Fragaria ananassa (Strawberry) Fruit Extract and their Catalytic Activity for Degradation of Industrial Dyes." Asian Journal of Chemistry 32, no. 3 (2020): 592–96. http://dx.doi.org/10.14233/ajchem.2020.22463.

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The prospect of developing new approaches in the assembly of noble metal nanoparticles and its functions has been garnering intense interest among researchers in various fields. The green synthesis method is an evolving trend as it is environment benign and aids in large-scale formation of nanoparticles. The versatile properties of green synthesized gold nanoparticles (AuNPs) like surface plasmon resonance, stability and morphology are examined by UV-visible spectroscopy (UV-Vis), dynamic light scattering (DLS), zeta potential (ZP) and high resolution transmission electron microscopy (HRTEM) s

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Lahootifar, Zahra, Aziz Habibi-Yangjeh, Shima Rahim Pouran, and Alireza Khataee. "G-C3N4 Dots Decorated with Hetaerolite: Visible-Light Photocatalyst for Degradation of Organic Contaminants." Catalysts 13, no. 2 (2023): 346. http://dx.doi.org/10.3390/catal13020346.

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In this paper, a facile hydrothermal approach was used to integrate graphitic carbon nitride dots (CNDs) with hetaerolite (ZnMn2O4) at different weight percentages. The morphology, microstructure, texture, electronic, phase composition, and electrochemical properties were identified by field emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), Fourier transform-infrared (FT-IR), ultraviolet-visible diffuse reflectance (UV-vi

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Küçük, Betül, and Gülder Emre. "Copying and Forgery in Oil Paintings: Researching and Application Example of Identification of Authenticity by Scientific Analysis." Anasay, no. 31 (February 25, 2025): 80–106. https://doi.org/10.33404/anasay.1614702.

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In this study, an unsigned oil painting from the Istanbul University Faculty of Letters collection, featuring an unknown painter and date, was subjected to dating and authentication processes. The painting exhibits a landscape on one surface and a nude female portrait on the other. Both surfaces were examined using visible light (VIS), raking light (RAK), ultraviolet (UV), and infrared (IR) light sources. For organic and inorganic pigment analyses, High Performance Liquid Chromatography (HPLC) and Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy (SEM-EDX) were employed. Fourie

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Que, Ruyue, Jean-Frédéric Audibert, Enrique Garcia-Caurel, et al. "Carbon Dot Synthesis in CYTOP Optical Fiber Using IR Femtosecond Laser Direct Writing and Its Luminescence Properties." Nanomaterials 14, no. 11 (2024): 941. http://dx.doi.org/10.3390/nano14110941.

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Luminescent carbon dots (CDs) were locally synthesized in the core of CYTOP fibers using IR femtosecond laser direct writing (FLDW), a one-step simple method serving as a post-treatment of the pristine fiber. This approach enables the creation of several types of modifications such as ellipsoid voids. The CDs and photoluminescence (PL) distribute at the periphery of the voids. The PL spectral properties were studied through the excitation/emission matrix in the visible range and excitation/emission spectra in the UV/visible range. Our findings reveal the presence of at least three distinct lum

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He, Hui, Xiaoqing Liao, Jiang Cheng, Ying Li, Junsheng Yu, and Lu Li. "Investigation of Energy Transfer in Star-Shaped White Polymer Light-Emitting Devices via the Time-Resolved Photoluminescence." Materials 11, no. 9 (2018): 1719. http://dx.doi.org/10.3390/ma11091719.

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A series of white polymer light-emitting devices (WPLEDs) were fabricated by utilizing star-shaped white-emission copolymers containing tri[1-phenylisoquinolinato-C2,N]iridium (Ir(piq)3), fluorenone (FO) and poly(9,9-dioctylfluorene) (PFO) as red-, green- and blue-emitting (RGB) components, respectively. In these WPLEDs, a maximum current efficiency of 6.4 cd·A−1 at 20 mA·cm−2 and Commission Internationale d’Eclairage (CIE) coordinates of (0.33, 0.32) were achieved, and the current efficiency was still kept to 4.2 cd·A−1 at the current density of 200 mA·cm−2. To investigate energy transfer pro

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Swiatkowski, Marcin, and Rafal Kruszynski. "New fluorescent compounds based on zinc thiocyanate: influence of structure on spectral properties." Acta Crystallographica Section C Structural Chemistry 73, no. 12 (2017): 1144–50. http://dx.doi.org/10.1107/s2053229617016564.

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New coordination compounds based on zinc thiocyanate, namely (acetone thiosemicarbazone-κ2 N 1,S)bis(isothiocyanato-κN)zinc(II) monohydrate, [Zn(NCS)2(C4H9N3S)]·H2O, (I), and diaquatetrakis(urea-κO)zinc(II) tetrakis(isothiocyanato-κN)zinc(II), [Zn(CH4N2O)4(H2O)2][Zn(NCS)4], (II), were synthesized and studied by UV–Vis, fluorescence and IR spectroscopy. Coordination salt (II) forms a rare system composed of two different coordination units of the same metal and it is the first example of a compound with two completely different zinc coordination units, of which one contains a tetrakis(urea)zinc

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