Investigation of Structural and Luminescent Properties of Sol-Gel-Derived Cr‑Substituted Mg₃Al_1−xCr_x Layered Double Hydroxides by Ligita Valeikiene, Inga Grigoraviciute-Puroniene, Arturas Katelnikovas, Aleksej Zarkov, Aivaras Kareiva

“…All Cr-containing powders exhibited characteristic emission in the red region of the visible spectrum. The strongest emission was observed for the sample doped with 5 mol% Cr³⁺ ions. …”
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XCycles Backprojection Acoustic Super-Resolution by Feras Almasri, Jurgen Vandendriessche, Laurent Segers, Bruno da Silva, An Braeken, Kris Steenhaut, Abdellah Touhafi, Olivier Debeir

“…The advancement of non-visible light sensors, such as acoustic imaging sensors, has attracted much attention, as they allow people to visualize the intensity of sound waves beyond the visible spectrum. However, because of the limitations imposed on acquiring acoustic data, new methods for improving the resolution of the acoustic images are necessary. …”
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Phyto-Mediated Green Synthesis of Silver Nanoparticles Using an Aqueous Leaf Extract of <i>Momordica cymbalaria</i>: Antioxidant, Cytotoxic, Antibacterial, and Photocatalytic Prope... by Madasamy Sundar, Gopalan Rajagopal, Ambikapathi Nivetha, Seetharaman Prabu Kumar, Selvaraj Muthukumar

“…The biosynthesis of <i>Mc</i>-AgNPs was confirmed using instruments, such as UV-visible spectroscopy FT-IR, XRD, SEM with EDX, and HR-TEM analyses. The UV-visible spectrum indicated absorbance at 425 nm. The crystallite size of the <i>M. cymbalaria</i>-stabilized nanoparticles was determined to be 20.14 nm. …”
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Synthesis, Characterization, Fluorescence Properties, and DFT Modeling of Difluoroboron Biindolediketonates by Angelo Maspero, Federico Vavassori, Luca Nardo, Guglielmo Vesco, Jenny G. Vitillo, Andrea Penoni

“…We report a simple and efficient strategy to enhance the fluorescence of biocompatible biindole diketonates (bdks) in the visible spectrum through difluoroboronation (BF₂bdks complexes). …”
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Integration of ZnO nanorods with silver ions by a facile co-precipitation for antimicrobial, larvicidal, and ovicidal activity by Elsayed Elgazzar, H. A. Ayoub, Z. A. El-Wahab, Wageha A. Mostafa

“…The energy gap $$({\mathrm{E}}_{\mathrm{g}})$$ ( E g ) was evaluated from the UV–Vis absorbance in the range from 2.90 $$-$$ - 3.08 eV inside the visible spectrum. The antimicrobial activity of the nanorods was examined against Gram-positive bacteria (Staphylococcus aureus and Bacillus subtilis) with inhibition zones 10.5 and 14.5 mm, respectively. …”
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III-nitride nanowires for emissive display technology by Veeramuthu Vignesh, Yuanpeng Wu, Sung-Un Kim, Jeong-Kyun Oh, Chandran Bagavath, Dae-Young Um, Zetian Mi, Yong-Ho Ra

“…The field of III-nitride (InGaN) nanowire micro light-emitting diode (µ-LED) displays is rapidly expanding and holds great promise, thanks to their chemical stability and outstanding performance across the entire visible spectrum. Notably, III-nitride (InGaN) nanowires, free from compositional substitutions, dislocations, and piezoelectric polarization effects associated with lateral strain relaxation with large surface-to-bulk-volume ratio, are advantage-missing in traditional planar counterparts. …”
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Testing multiple hypotheses on the colour change of treefrogs in response to various external conditions by Chohee Park, Seongsoo No, Sohee Yoo, Dogeun Oh, Yerin Hwang, Yongsu Kim, Changku Kang

“…Third, though both temperature and background colour induced a change in near-infrared reflectance, this change was largely explained by the high correlation between colour (reflectance in the visible spectrum) and near-infrared reflectance. Fourth, within-individual variation in colour change capacity (i.e., the degree of colour change an individual can display) was lower than inter-individual variation, suggesting individuality of colour change capacity; however, we also found that colour change capacity could change gradually with time within individuals. …”
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Boosting the Photoelectrochemical Performance of Au/ZnO Nanorods by Co-Occurring Gradient Doping and Surface Plasmon Modification by Ali Can Güler, Jan Antoš, Milan Masař, Michal Urbánek, Michal Machovský, Ivo Kuřitka

“…The IPCE and ABPE efficiency tests confirmed the boosted photoresponse of gradient Au-incorporated ZnO NRs, particularly in the visible spectrum due to the synergistic surface plasmonic effect of Au NPs. …”
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Optical-Quality Assessment of a Miniaturized Intraocular Telescope by Irene Nepita, Raffaele Raimondi, Simonluca Piazza, Alberto Diaspro, Faustino Vidal-Aroca, Salvatore Surdo, Mario R. Romano

“…The device exhibited even optical transmission in the whole visible spectrum and effective curvature suitable for retinal images magnification with negligible geometrical aberrations. …”
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Facile hydrothermal synthesis of BiVO4 nanomaterials for degradation of industrial waste by Muhammad Salim Mansha, Tahir Iqbal, Muhammad Farooq, Khalid Nadeem Riaz, Sumera Afsheen, Muhammad Shehzad Sultan, Nabil Al-Zaqri, Ismail Warad, Arslan Masood

“…It is worth mentioning that desirous bandgap corresponds to the visible spectrum of the solar light being abundantly available and finds many applications in real life. …”
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High efficiency and scalable fabrication of fresnel zone plates using holographic femtosecond pulses by Wang Zhipeng, Jiang Lan, Li Xiaowei, Gao Shuai, Zhou Shipeng, Liu Yang, Huang Lingling, Lu Jiangang, Yin Jiangang

“…The fabricated FZPs possess an excellent broadband focusing and imaging ability in the visible spectrum. Furthermore, the fabrication of other functional ultrathin lenses, such as axial multifocal zone plates, petal-like zone plates, and FZP arrays, is described, revealing the wide potential for the flexible and scalable fabrication method in on-chip integrated optical systems.…”
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Preparation and properties of Ag nanocluster composites by radiation method by HAN Fei, WANG Wenrui, LI Danyi, SHEN Rongfang, JIANG Haiqing, LI Jihao, LI Linfan

“…Finally, the fluorescence detection performance and catalytic performance of silver nanoclusters were tested by fluorescence spectrometer and the UV visible spectrum.ResultsThe silver nanoclusters and composites prepared in this study have retained the photoluminescence and catalytic activity characteristic of silver nanoclusters, thereby presenting potential applications in metal ion detection and catalytic degradation of 4-nitrophenol. …”
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Mapping Underwater Bathymetry of a Shallow River from Satellite Multispectral Imagery by Shayan Salavitabar, S. Samuel Li, Behzad Lak

“…The obtained flow depths using the ratio of reflectance of the red band (630–690 nm) to that of the green band (510–580 nm), among the eight bands in the visible spectrum, agree best with in-situ measurements. …”
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Effect of Precursor Concentration on the Structural, Optical, and Electrical Properties of WO3 Thin Films Prepared by Spray Pyrolysis by Farhan Mohammed, Evan Salim, Azhar Hassan, Mohammed Wahid

“…Tungsten oxide was deposited on glass surfaces at different molarities ranging from 50–90mM. In the UV-Visible spectrum of the WO₃ thin film, it was found that the transmittance, reflectivity, and energy gap decreased (78%–53%), (9.63%–5.02%), and (3.40eV–2.63 eV), respectively. …”
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Artificial Intelligence Systems for Solving Problems of Agro­Industrial Complex Digitalization and Robotization by A. L. Ronzhin, A. I. Savel'ev

“…The digital transformation of agricultural technological processes is substantiated to be relevant in the context of the exacerbating global problems of food security, the agricultural business stagnation in the regions of the northern Non-Black Earth Region, as well as the ESG transformation of the economy.Research purpose To develop control algorithms for unmanned aerial vehicles (UAVs) based on numerical methods of machine learning to ensure the monitoring of the crops state and the improving of the production process planning and operational management.Materials and methods The following methodology was used: the original methods of machine learning, knowledge engineering and computer modeling for organizational and technological processes of technical objects’ life cycle in industry and products’ life cycle in the national economy,  as well as mathematical and algorithmic models, methods and prototypes of proactive automation tools for information, physical and energy interaction of heterogeneous robotic and cyber-physical complexes.Results and discussion Artificial intelligence systems were created for the photogrammetric processing of visible spectrum images and those taken with multispectral video cameras with the construction of orthophotomaps, digital elevation models. …”
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Leveraging Nanocavity Harmonics for Control of Optical Processes in 2D Semiconductors by Akselrod, Gleb M., Ming, Tian, Argyropoulos, Christos, Hoang, Thang B., Lin, Yuxuan, Ling, Xi, Smith, David R., Kong, Jing, Mikkelsen, Maiken H.

“…Here, we show a plasmonic nanocavity based on a nanopatch antenna design that has two tunable resonant modes in the visible spectrum separated by 350 nm and with line widths of ∼60 nm. …”
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Direct imaging of isofrequency contours in photonic structures by Hsu, C. W., Regan, Emma, Igarashi, Yuichi, Zhen, Bo, Kaminer, Ido Efraim, Shen, Yichen, Joannopoulos, John, Soljacic, Marin

“…We demonstrate a method to directly visualize the isofrequency contours of high-quality photonic crystal slabs that show quantitatively good agreement with numerical results throughout the visible spectrum. Our technique relies on resonance-enhanced photon scattering from generic fabrication disorder and surface roughness, so it can be applied to general photonic and plasmonic crystals or even quasi-crystals. …”
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Real-time identification and visualization of Egyptian blue using modified night vision goggles by Nicola, Marco, Gobetto, Roberto, Bazzacco, Alessandro, Anselmi, Chiara, Ferraris, Enrico, Russo, Alfonsina, Masic, Admir, Sgamellotti, Antonio

“…The possibility to use light in the visible spectrum to induce near-infrared luminescence in some materials, particularly Egyptian blue and related pigments, offers a significant advantage in terms of their detection. …”
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Photodetectors based on colloidal quantum dots by Oertel, David C. (David Charles)

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Chromium (III), Titanium (III), and Vanadium (IV) sensitization of rare earth complexes for luminescent solar concentrator applications by Thompson, Nicholas John

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