Photocatalytic Degradation of Organic Dyes under Visible Light on N-Doped TiO2 Photocatalysts by Olga Sacco, Marco Stoller, Vincenzo Vaiano, Paolo Ciambelli, Angelo Chianese, Diana Sannino

“…The photocatalytic activity of N-doped titanium dioxide, synthesized by direct hydrolysis of titanium tetraisopropoxide with ammonia, was evaluated by means of a batch photoreactor. The bandgap energy of titanium dioxide was moved in the visible range from 3.3 eV to 2.5 eV. …”
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Mathematical Modeling of Properties and Structures of Crystals: From Quantum Approach to Machine Learning by Grzegorz Matyszczak, Christopher Jasiak, Gabriela Rusinkiewicz, Kinga Domian, Michał Brzozowski, Krzysztof Krawczyk

“…This is due to the fact that prepared crystalline solids of practically useful materials (inorganic or organic) may be utilized for the thorough characterization of important properties such as (among others) energy bandgap, light absorption, thermal and electric conductivity, and magnetic properties. …”
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Pressure-controlled luminescence in fast-response barium fluoride crystals by Marilou Cadatal-Raduban, Luong Viet Mui, Masahiro Yamashita, Yuki Shibazaki, Toshihiko Shimizu, Nobuhiko Sarukura, Kohei Yamanoi

“…Increasing the pressure decreases the core-valence bandgap due to the downward expansion of the valence band, resulting in a decrease in the valence band minimum. …”
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Probing and manipulating the Mexican hat-shaped valence band of In2Se3 by James Felton, Jordan Harknett, Joe Page, Zhuo Yang, Nada Alghofaili, James N. O’Shea, Laurence Eaves, Yoshimitsu Kohama, Mark T. Greenaway, Amalia Patanè

“…Here, we use nanoscale angle-resolved photoemission electron spectroscopy and optical transmission in high magnetic fields to reveal the electronic band structure of the van der Waals ferroelectric indium selenide (α-In2Se3). This indirect bandgap semiconductor features a weakly dispersed valence band, which is shaped like an inverted Mexican hat. …”
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Crystallographic characterization of Ag‐doping in nanocrystallite hydroxyapatite and evaluation of photocatalytic activity of organic pollutants by Md. Sahadat Hossain, Shifa Sarkar, Samina Ahmed

“…The samples were characterized with the aid of X‐ray diffraction (phase analysis, crystallographic characterization, and crystal size calculation using Scherrer equation and different models), scanning electron microscopy, and optical bandgap energy. The Hap containing 0.25% Ag showed better photocatalytic activity in various dye concentrations, catalyst doses, and pH. …”
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Predicting thermodynamic stability of inorganic compounds using ensemble machine learning based on electron configuration by Hao Zou, Haochen Zhao, Mingming Lu, Jiong Wang, Zeyu Deng, Jianxin Wang

“…We present two case studies to demonstrate that our method can facilitate the exploration of new two-dimensional wide bandgap semiconductors and double perovskite oxides. …”
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Transparent electro-optic ceramics: Processing, materials, and applications by Iva Milisavljevic, Man Zhang, Qinghui Jiang, Qing Liu, Yiquan Wu

“…Synthesis of high-performance transparent EO ceramics requires high purity of raw materials, high density, homogeneous composition, uniform grain size, and relatively wide bandgap. Powder synthesis and sintering are two of the critical steps involved in the fabrication of highly transparent EO ceramics. …”
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The influence of the conduction band of BaCl2 on the thermal quenching of the Tm2+ 4f125d1→4f13 and 4f13→4f13 luminescence in orthorhombic BaCl2:Tm2+/3+ by M.P. Plokker, H.T. Hintzen

“…In addition, the energy for exciton creation in the orthorhombic BaCl2 host lattice was established, from which the bandgap energy was determined. This value was found to correspond quite well to known literature values. …”
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Ultra‐Low Threshold Resonance Switching by Terahertz Field Enhancement‐Induced Nanobridge by Sang‐Hun Lee, Moohyuk Kim, Yeeun Roh, Myung‐Ki Kim, Minah Seo

“…In this study, ultra‐low threshold resonance mode switching by strong nonlinear carrier transport beyond the semi‐classical Boltzmann transport regime using terahertz (THz) electromagnetic waves are demonstrated, whose energy is thousands of times smaller than the bandgap. This is achieved by employing elaborately fabricated 3D tip structures at the nanoscale, and nonlinear effects are directly observed with the THz resonance mode switching. …”
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Bi2O3–BiOCl/poly-m-methyl aniline nanocomposite thin film for broad-spectrum light-sensing by Ben Gouider Trabelsi Amira, Alkallas Fatemah H., Kusmartsev Fedor V., Rabia Mohamed

“…X-ray diffraction (XRD) analysis confirms the composite’s high crystallinity and compact size of 41 nm, indicative of excellent optical properties and a narrow bandgap of 2.35 eV. The optical analysis of the synthesized core–shell composite is performed using Fourier transform infrared spectroscopy (FTIR). …”
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ATO/Polyaniline/PbS Nanocomposite as Highly Efficient Photoelectrode for Hydrogen Production from Wastewater with Theoretical Study for the Water Splitting by Mohammed A. H. Khalafalla, N. M. A. Hadia, Asmaa M. Elsayed, Mansoor Alruqi, Wassim El Malti, Mohamed Shaban, Mohamed Rabia

“…The optical analyses were massively enhanced after the composite formation with more broadening in the Vis region at 630 nm, in which there was more enhancement in the bandgap that reached 1.5 eV. The electrode application in the H2 generation process was carried out from wastewater (sewage water, third treatment) without any additional sacrificing agent. …”
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Facile Controlling of the Physical Properties of Zinc Oxide and Its Application to Enhanced Photocatalysis by Tuan Vu Anh, Thi Anh Tuyet Pham, Van Hung Mac, Thanh Hung Nguyen

“…R-ZnO was composed of many hexagonal rods and few spherical particles, while N-ZnO microstructures were made up of nanoparticles with approximately 20–30 nm, exhibiting the largest surface area, pore volume, and pore width among as-prepared samples, and their crystal size and bandgap energy were 17.8 nm and 3.207 eV, respectively. …”
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Enhancing visible luminescence in sprayed-ZnO nanostructure through Cu doping by Fatima Zohra Bedia, Asma Bedia, Sidi Mohammed Bedia, Nabila Maloufi, Michel Aillerie, Khadidja Rahmoun

“…An increase in defects in the ZnO crystal leads to bandgap narrowing, from 3.273 to 3.202 eV. This study demonstrates that CZO films, synthesized through a cost-effective and straightforward method, are well-suited for optoelectronic applications.…”
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Hydrothermal Synthesis of CuO Nanoparticles: Tailoring Morphology and Particle Size Variations for Enhanced Properties by Tijen Ennil Bektaş, Uğur Cengiz, Gürkan Akarken

“…Among these, CuO stands out as a p-type semiconductor having narrow bandgap energy ranges from 1.2 to 2 eV, finding versatile applications such as gas sensing, magnetic storage, solar energy conversion, photocatalysis, supercapacitors, field-emission emitters, and optical switches. …”
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Green Synthesis of Silver Nanoparticles Using Catharanthus roseus Flower Extracts and the Determination of Their Antioxidant, Antimicrobial, and Photocatalytic Activity by Mathivathani Kandiah, Kavishadhi N. Chandrasekaran

“…The SEM image of purple flower AgNPs and the calculated bandgap energies of the synthesized AgNPs showed that the synthesized AgNPs were in the range of 0–30 nm. …”
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Synthesis, Characterization, Optical and Dielectric Properties of NiO and Zn-Doped NiO Nanostructures: Toward Advanced Applications by Atizaz Ali, Sohail Ahmad, Muhammad Usman, Nangyaley Khan, Muhammad Hashim, Yasir Ali, Rasool Shah, Naveed Ur Rahman

“…Ultraviolet–visible (UV-Vis) spectroscopy demonstrated heightened absorption in doped and nanocomposite samples. The bandgap energy calculated using Tauc’s plot reduced from 2.95 to 2.55 eV with increase in zinc (Zn) content. …”
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Lepidium sativum Seed Extract-Mediated Synthesis of Zinc Oxide Nanoparticles: Structural, Morphological, Optical, Hemolysis, and Antibacterial Studies by Adnan Alnehia, Annas Al-Sharabi, Abdel-Basit Al-Odayni, A. H. Al-Hammadi, Fares H. AL-Ostoot, Waseem Sharaf Saeed, Naaser A. Y. Abduh, Ali Alrahlah

“…The results indicated a 24.2 nm crystallite size, a hexagonal structure phase, and a 3.48 eV optical bandgap. Antibacterial studies revealed a dose-dependent response with comparable activity to the standard drug (gentamicin) and higher activity against S. aureus than E. coli, e.g., the zone of inhibition at 120 mg/mL was 23 ± 1.25 and 16 ± 1.00 mm, respectively. …”
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Understanding the impact of plasma functionalized MWCNTs on the structure, physicochemical and mechanical properties of PEMA by Omar F. Farag, N. A. M. Eid, Essam M. Abdel‑Fattah

“…Optical studies showed a reduction in the bandgap energy as the f-MWCNTs content increased, accompanied by significant improvements in optical properties such as refractive index (n), extinction coefficient (k), dielectric constants (ε′ and ε″), and optical conductivity (σopt). …”
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Extreme Electron‐Photon Interaction in Disordered Perovskites by Sergey S. Kharintsev, Elina I. Battalova, Ivan A. Matchenya, Albert G. Nasibulin, Alexander A. Marunchenko, Anatoly P. Pushkarev

“…In this paper, a new strategy based on both cases for the light‐matter‐interaction enhancement in a direct bandgap semiconductor – lead halide perovskite CsPbBr3 – by using electric pulse‐driven structural disorder, is addressed. …”
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THE EFFECT OF CRITICAL ELECTRIC FIELDS ON THE ELECTRONIC DISTRIBUTION OF BILAYER ARMCHAIR GRAPHENE NANORIBBONS by Lam Thuy Duong Nguyen, Thi Kim Quyen Nguyen, Nguyen Huu Hanh Pham, Dang Khoa Le, Van Chinh Ngo, Thi Kim Loan Phan, Anh Huy Huynh, Thanh Tra Vu

“…The results show that the perpendicular electric field has a strong impact on modifying and controlling the bandgap of BL-AGNRs. At the critical values of this electric field, distortions of energy dispersion in subbands and the formation of new electronic excitation channels occur strongly. …”
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