Physical Properties of Macroporous Tungsten Oxide Thin Films and Their Impact on the Photocurrent Density by I. Riech, M. Acosta, M. A. Zambrano-Arjona, F. Peñuñuri, M. Rosado-Mendoza, E. Marín, P. Rodríguez-Fragoso, J. G. Mendoza-Álvarez

“…X-ray diffraction data and electron microscopy images show that annealed films exhibit polycrystalline structure with monoclinic phase and pore size of approximately hundred nanometers. The optical band gap energies have been determined by photoacoustic spectroscopy as 3.17 eV, and this value was not affected by sample morphology. …”
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Hydrothermal Preparation of Ag/Ag1.69Sb2.27O6.25 Sesame-Hollow-Ball-Type Nanocomposites: The Formation Mechanism of Metallic Ag in the Ag-H2O System at 400 K by Haomei Liu, Xihai Hao, Yuejun Liu, Aiguo Yan

“…The light absorption property of as-prepared materials is studied by UV-vis/DRS, and the adsorption band is located at 445 nm, and the estimated energy band gap (Eg) is 2.55 eV. The calculated partial φ-pH diagrams in the Ag-H2O system at 400 K predict that the Ag+ ion can react with H2 to form metallic Ag.…”
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Optical, X-Ray Diffraction, and Magnetic Properties of the Cobalt-Substituted Nickel Chromium Ferrites (CrCo𝑥Ni1−𝑥FeO4, 𝑥=0,0.2,0.4,0.6,0.8,1.0) Synthesized Using Sol-Gel... by Sonal Singhal, Santosh Bhukal, Jagdish Singh, Kailash Chandra, S. Bansal

“…However, the coercivity decreases with increase in cobalt concentration due to the decrease in anisotropy field. The band gap has been calculated using UV-VIS spectrophotometry and has been found to decrease with the increase of particle size.…”
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Biosynthesis of ZnO nanoparticles using banana peel pectin for antibacterial and photocatalytic applications by Kazi Suraiya Islam, Md. Hasnain Mustak, Md. Khalid Hossain Shishir, Md. Minnatul Karim, Gazi Md. Arifuzzaman Khan

“…The UV–vis analysis revealed absorption peak at 338.0 nm with an optical band gap of 3.08 eV, confirming the synthesis of p-ZnO NPs. …”
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Photocatalytic Activity under Simulated Sunlight of Bi-Modified TiO2 Thin Films Obtained by Sol Gel by D. A. Solís-Casados, L. Escobar-Alarcón, V. Alvarado-Pérez, E. Haro-Poniatowski

“…Optical measurements reveal that the band gap narrows from 3.3 eV to values as low as 2.7 eV. …”
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Hydrogenated Nanocrystalline Silicon Thin Films Prepared by Hot-Wire Method with Varied Process Pressure by V. S. Waman, A. M. Funde, M. M. Kamble, M. R. Pramod, R. R. Hawaldar, D. P. Amalnerkar, V. G. Sathe, S. W. Gosavi, S. R. Jadkar

“…The ease of depositing films with tunable band gap is useful for fabrication of tandem solar cells. …”
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The Effect of Channel Layer Thickness on the Performance of GaN HEMTs for RF Applications by Qian Yu, Sheng Wu, Meng Zhang, Ling Yang, Xu Zou, Hao Lu, Chunzhou Shi, Wenze Gao, Mei Wu, Bin Hou, Gang Qiu, Xiaoning He, Xiaohua Ma, Yue Hao

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Comprehensive study for radiation shielding features for Bi2O3–B2O3–ZnO composite using computational radioanalytical Phy-X/PSD, MCNP5, and SRIM software by Y. S. Alajerami, M. H. A. Mhareb, M. I. Sayyed, M. Kh. Hamad, F. Kodeh, M. Rashad, M. Mitwalli

“…The density showed rising from 5.981 to 6.433 g/cm3 with adding ZnO. The band gap values reduced from 2.831 to 2.091 eV for direct and 3.024 to 2.218 eV for indirect with adding ZnO. …”
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Visible-Light-Driven Degradation of Chloramphenicol Using CeO₂ Nanoparticles Prepared by a Supercritical CO₂ Route: A Proof of Concept by Maria Chiara Iannaco, Antonietta Mancuso, Stefania Mottola, Andrea Pipolo, Vincenzo Vaiano, Iolanda De Marco

“…After thermal annealing, the CeO₂ samples were characterized through UV–Vis diffuse reflectance spectroscopy to evaluate the band gap energy values. Raman and FT-IR spectroscopy confirmed the presence of oxygen vacancies in the CeO₂ lattice. …”
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Submicrosecond Q-Switching Er-Doped All-Fiber Ring Laser Based on Black Phosphorus by Yao Cai, Yanliang He, Xiaoke Zhang, Rui Jiang, Chenliang Su, Ying Li

“…Black phosphorus (BP), a new two-dimensional (2D) material, has been deeply developed for extensive applications in electronics and optoelectronics due to its similar physical structure to graphene and thickness dependent direct band gap. Here, we demonstrated a submicrosecond passive Q-switching Er-doped fiber laser with BP as saturable absorber (SA). …”
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Effect of Cl substitution on the microstructure, dielectric and optical properties of CaCu3Ti4O12 ceramics by Najwa. Gouitaa, Sahil Kumar, Fatima Zahra. Ahjyaje, Taj-dine. Lamcharfi, Amina. Benatia, Mustapha. Abarkan, Mamta Shandilya

“…Optical analysis showed a redshift in absorption peaks, and the band gap energy reduced to 1.68 eV, attributed to enhanced crystallinity and phase transformations. …”
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Fabrication of Cu: ZnO thin film sensor for ethanol vapor detection by Robin Simkhada, Dalton R. Gibbs, Soma Dhakal, Dipak Oli, Rishi Ram Ghimire, Deependra Das Mulmi, Leela Pradhan Joshi

“…The UV-visible results showed a significant decrease in the band gap from 3.28 eV for undoped ZnO to 3.20 eV for Cu: ZnO films. …”
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ZnO Nanoparticles by Hydrothermal Method: Synthesis and Characterization by Juan Carlos Anaya-Zavaleta, Antonio Serguei Ledezma-Pérez, Carlos Gallardo-Vega, Joelis Rodríguez-Hernández, Carmen Natividad Alvarado-Canché, Perla Elvia García-Casillas, Arxel de León, Agustín Leobardo Herrera-May

“…In addition, the effective mass model provided an estimated band gap that matched with the reported data. Also, the lattice parameters, interplanar distances, and Zn-O bond lengths were consistent with Joint Committee on Powder Diffraction Standards (JCPDS). …”
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Structural study, optical properties, thermal stability, and biological activity of a non-centrosymmetric hybrid compound 3,4-Diaminopyridinium perchlorate (3,4-DAPP) by Soulayma Mtar, Sameh Sellami, Nassira Chniba-Boudjada, Mohamed Boujelbene

“…Additionally, the optical properties were investigated by UV–Vis absorption and photoluminescence spectroscopy, which exhibit emission property, and a band gap energy of 3.9 eV. Finally, biological activity tests revealed that 3,4-DAPP exhibited moderate antibacterial activity, particularly against Bacillus cereus. …”
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Etude expérimentale et théorique d’un nouveau composé halogène pnicture Hg$_{12}$Sb$_6 ($Br$_{5,186}$I$_{6,814})$ by Kheit, Messaoud, Merazka, Soumia, Kars, Mohammed, Gómez-Herrero, Adrian, Roisnel, Thierry, Sidoumou, Mohamed

“…Its structure was determined by single crystal X-ray diffraction. The optical band gap was determined as 2,1 eV according to UV${-}$vis diffuse reflectance spectroscopy. …”
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Photocatalytic degradation of tetracycline by Fe-doped mechanically activated SrTiO3 powders in aqueous solution by Živojinović Jelena, Peleš-Tadić Adriana, Kosanović Darko, Dinić Ivana, Vuković Marina, Obradović Nina

“…Optical measurements indicated a shift of the absorption edge to higher values of wavelengths where the lowest value of the band gap (Eg=1.85 eV) was for the longest activation time (120 min) and the highest weight percentages of dopant (6 wt%). …”
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Fabrication of Cu: ZnO thin film sensor for ethanol vapor detection by Robin Simkhada, Dalton R. Gibbs, Soma Dhakal, Dipak Oli, Rishi Ram Ghimire, Deependra Das Mulmi, Leela Pradhan Joshi

“…The UV-visible results showed a significant decrease in the band gap from 3.28 eV for undoped ZnO to 3.20 eV for Cu: ZnO films. …”
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Photocatalytic Mineralization of Organic Acids over Visible-Light-Driven Au/BiVO4 Photocatalyst by Kanlaya Pingmuang, Natda Wetchakun, Wiyong Kangwansupamonkon, Kontad Ounnunkad, Burapat Inceesungvorn, Sukon Phanichphant

“…Photocatalytic results showed that all Au/BiVO4 samples exhibited higher oxalic acid mineralization rate than that of pure BiVO4, probably due to a decrease of BiVO4 band gap energy and the presence of surface plasmon absorption upon loading BiVO4 with Au as evidenced from UV-Vis DRS results. …”
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Adsorption of Mo and O at S-vacancy on ReS2 surface of ReS2/MoTe2 vdW heterointerface by Puneet Kumar Shaw, Jehan Taraporewalla, Sohaib Raza, Akash Kumar, Rimisha Duttagupta, Hafizur Rahaman, Dipankar Saha

“…Here, we emphasize the changes in effective band gap owing to defect-induced states as well as modulation of the energy gap value with Molybdenum (Mo) and Oxygen (O) adsorption at the defect site. …”
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Enhanced Laser Damage Threshold in Optically Addressable Light Valves via Aluminum Nitride Photoconductors by Soroush Ghandiparsi, Bikram Chatterjee, Jimmy‐Xuan Shen, Miranda S. Gottlieb, Clint D. Frye, Joseph D. Schneider, Ryan D. Muir, Brandon W. Buckley, Sara E. Harrison, Qinghui Shao, Joel B. Varley, Lars F. Voss

“…Aluminum nitride (AlN), an emerging ultra‐wide band gap (UWBG) III–V semiconductor, offers promising optoelectronic properties and superior thermal conductivity (>300 Wm−1K−1 at 298° K, compared to BSO's 3.29 Wm−1K−1). …”
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