Article
Physics, Multidisciplinary
Annabelle Bohrdt, Lukas Homeier, Immanuel Bloch, Eugene Demler, Fabian Grusdt
Summary: Studies suggest that high-temperature pairing of fermions can be achieved in bilayer models, utilizing the energy gained by one charge when it follows the path created by another charge.
Article
Chemistry, Physical
Preetam Singh, Vikash Mishra, Sajal Barman, Mohammad Balal, Sudipta Roy Barman, Arvind Singh, Sunil Kumar, Renjith Ramachandran, Pankaj Srivastava, Santanu Ghosh
Summary: Pure ZnO films annealed in H-2 ambience exhibit room temperature ferromagnetism, with observed enhancements in O-H concentration, carrier concentration, and vacancy type defects. The increase in magnetic moment is explained by the increased carrier mediated exchange interaction among localized magnetic moments at V-Zn sites, as verified both experimentally and theoretically.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Inorganic & Nuclear
A. Krishnanunni, Akshayakumar Kompa, Dhananjaya Kekuda, M. S. Murari, K. Mohan Rao
Summary: This study investigates the impact of defects on the magnetic behavior of ZnO based samples, specifically Co-Sm co-doped ZnO nano powder. The results show that the prepared samples exhibit wurtzite phase with enhanced defects on doping and co-doping. The presence of defects in the samples enhances their magnetic behavior.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Ali Hassan, Abbas Ahmad Khan, Yeong Hwan Ahn, Muhammad Azam, Muhammad Zubair, Wei Xue, Yu Cao
Summary: Temperature-, excitation wavelength-, and excitation power-dependent photoluminescence spectroscopy was used to investigate the orientation-dependent emissions of ZnO single crystals. The results showed that ZnO crystals with < 0001 > orientation exhibited strong and sharp emission intensity with suppressed deep level defects, indicating better crystallinity. At low temperature, neutral donor-to-bound exciton transition dominated, while free-exciton transition emerged at higher temperatures in all orientations. The intensity dependence on excitation power followed a power-law, with different power-law exponents for different orientations. The comprehensive analysis suggested that < 0001 > orientation had intense excitonic emission in the near band edge region, making it favorable for fabricating highly efficient optoelectronic devices.
Article
Chemistry, Physical
Samuel M. Fehr, Karin Nguyen, Christian Njel, Ingo Krossing
Summary: The study on a Cu/ZnO catalyst system for methanol synthesis promoted by oxidative fluorination revealed that the fluorinated systems exhibit higher activity and selectivity under specific conditions, with negligible water inhibition.
Article
Engineering, Electrical & Electronic
Eliyash Ahmed, Kasilingam Senthilkumar
Summary: The study found that unintentionally hydrogen-doped zinc oxide nanoparticles exhibit ferromagnetic-like nature due to intrinsic defects. This unusual property is induced by electrons or holes trapped by complex defects, leading to ferromagnetic characteristics.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
George Tzvetkov, Martin Tsvetkov, Tony Spassov
Summary: A novel hierarchically-structured edelweiss-like ZnO microparticles were successfully fabricated using a single-step wet-chemical synthetic approach. The photoluminescence properties of the microparticles were analyzed, showing intense UV-violet emission at room temperature and predominant UV-violet-blue co-emission after low-temperature annealing. The relationship between the photoluminescence properties and intrinsic defects in ZnO was examined in this study.
Article
Chemistry, Multidisciplinary
Yu-Ying Yang, Xiao-Quan Zhu, Jean-Pierre Launay, Cheng-Bin Hong, Shao-Dong Su, Yue-Hong Wen, Xin-Tao Wu, Tian-Lu Sheng
Summary: By synthesizing trimetallic isocyanidometal-bridged compounds with different oxidation states, the electron transfer process in oxidation reactions was investigated. The bridged states and mixed-valence states were simultaneously observed in N3+ compounds, while the electron transfer bridge excited state became more stable in N4+ compounds.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Nanoscience & Nanotechnology
Soumya Biswas, Saurabh Singh, Shubham Singh, Shashwata Chattopadhyay, K. Kanishka H. de Silva, Masamichi Yoshimura, Joy Mitra, Vinayak B. Kamble
Summary: By selectively enhancing phonon scattering through Al doping and reduced graphene oxide (RGO) encapsulation, a significant increase in the zT value of ZnO has been demonstrated, making it a promising candidate for high-temperature thermoelectric power generation applications. Innovations in electrical and thermal conductivities lead to improved power factors and overall TE efficiency.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Chengtao Xia, Jinxin Chen, Tong Zhao, Linlin Fan, Deren Yang, Xiangyang Ma
Summary: This study reports on a LED based on erbium-doped zinc oxide/SiO2/n(+)-Si heterostructure, with a significant enhancement of erbium-related emissions achieved through titanium codoping.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Da-Yong Lu, Xin Wei, Qian Cai
Summary: Ceramics with nominal compositions (Ba1-xNdx)(Ti1-xYbx)O-3 (BNTY) were prepared in air using a solid-state-reaction method. The co-solubility of Nd/Yb in BNTY determined by XRD was x = 0.05, and the sample with x = 0.05 (BNTY5) exhibited good dielectric properties with a pseudo-cubic structure and stable dielectric specifications at high temperatures. The presence of mixed valence states of Yb3+/Yb2+ and the reverse reducing effect were confirmed in BNTY5.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
N. N. R. Ahmad, C. P. Leo, A. W. Mohammad
Summary: Two different methods, IL/dope solution blending and post-modification using IL, were investigated in modifying asymmetric PSf/SAPO-34 MMM. Results showed that post-modification method successfully sealed defects and improved CO2/N2 selectivity by over 1000%.
Article
Physics, Condensed Matter
V. Sivakumar, D. Sivaganesh, J. Nandha Gopal, M. Muthuvinayagam, Ji Man Kim, Padmanathan Karthick Kannan, S. Saravanakumar
Summary: In this study, phase pure wurtzite structured ZnO phosphor was prepared by sintering different precursors at various temperatures in a reducing atmosphere. The structural information confirmed the wurtzite hexagonal phase, with SEM showing irregular spherical morphology and EDAX spectrum confirming the presence of Zn and O species. The study also observed deep-level green emission for ZnO samples sintered without impurities in reducing atmosphere, with optimal photoluminescence properties achieved at 900°C and 1000°C sintering temperatures under 380 nm excitation.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Engineering, Electrical & Electronic
Ruolin Yan, Tsunaki Takahashi, Hao Zeng, Takuro Hosomi, Masaki Kanai, Guozhu Zhang, Kazuki Nagashima, Takeshi Yanagida
Summary: This study demonstrates a strategy to enhance the pH tolerance of Al-doped ZnO nanofilms through sequential annealing technique, resulting in improved resistance to chemical etching in acidic and basic solutions. The enhanced pH tolerance is attributed to the compensation of anion/cation vacancies and surface polarity of the ZnO(0001) surface, shedding light on the importance of sequential annealing for robust electrode applications.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Engineering, Environmental
Inamullah Douna, Sarah Farrukh, Erum Pervaiz, Arshad Hussain, Xian Feng Fan, Zarrar Salahuddin
Summary: The separation of carbon dioxide poses great challenges in the chemical process industry. Among various methods, membrane separation is a promising approach due to its advantages. This study synthesized cellulose acetate/zinc oxide nanorods mixed matrix membranes and investigated their performance. The incorporation of ZnO nanorods increased the permeability of CO2 while decreasing the permeability of H2. The highest selectivity of 2.77 for CO2/H2 was achieved with the addition of 0.7 wt% ZnO nanorods.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Chemistry, Inorganic & Nuclear
J. J. Beltran, C. A. Barrero, A. Punnoose
JOURNAL OF SOLID STATE CHEMISTRY
(2016)
Article
Materials Science, Multidisciplinary
L. A. Morales, G. Sierra-Gallego, C. A. Barrero, O. Arnache
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2016)
Article
Engineering, Chemical
H. Salazar-Tamayo, M. A. Marquez, C. A. Barrero
Article
Materials Science, Multidisciplinary
L. A. Morales, G. Sierra-Gallego, C. A. Barrero, O. Arnache
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2016)
Article
Materials Science, Multidisciplinary
H. Salazar-Tamayo, K. E. Garcia, C. A. Barrero
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
Carlos Andres Palacio Gomez, Cesar Augusto Barrero Meneses, Arnaldo Matute
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2018)
Article
Materials Science, Multidisciplinary
Carlos Andres Palacio Gomez, Csar Augusto Barrero Meneses, Juan Antonio Jaen
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2020)
Proceedings Paper
Physics, Atomic, Molecular & Chemical
E. Giraldo, A. A. Ruales, L. F. Ramirez, J. E. Tobon, J. H. Lopez, C. A. Barrero
HYPERFINE INTERACTIONS
(2020)
Article
Chemistry, Multidisciplinary
Veronica Villacorta, Cesar Augusto Barrero, Maria-Belen Turrion, Francisco Lafuente, Jean-Marc Greneche, Karen Edilma Garcia
Article
Materials Science, Multidisciplinary
Harrison Salazar-Tamayo, Karen Edilma Garcia Tellez, Cesar Augusto Barrero Meneses
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2019)
Article
Chemistry, Multidisciplinary
VerOnica Villacorta, Karen Edilma Garcia, Jean-Marc Greneche, Cesar Augusto Barrero
Article
Chemistry, Physical
Jailes J. Beltran, Cesar A. Barrero, Alex Punnoose
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2019)
Proceedings Paper
Physics, Atomic, Molecular & Chemical
P. I. Arredondo S, C. A. Barrero, K. E. Garcia, J. M. Greneche
HYPERFINE INTERACTIONS
(2017)
Proceedings Paper
Physics, Atomic, Molecular & Chemical
J. H. Lopez, J. Restrepo, C. A. Barrero, J. E. Tobon, L. F. Ramirez, J. Jaramillo
HYPERFINE INTERACTIONS
(2017)