Article
Multidisciplinary Sciences
Jesus Inarrea
Summary: This study theoretically examines the characteristics of microwave-induced magnetoresistance (MIRO) and photovoltage oscillations in MgZnO/ZnO heterostructures, and finds that they have the same physical origin.
SCIENTIFIC REPORTS
(2022)
Article
Energy & Fuels
Ramesh Pandey, Amit Munshi, Tushar Shimpi, Akash Shah, Alexandra Bothwell, Darius Kuciauskas, James R. Sites
Summary: By adjusting the magnesium content in the MgXZn1-XO (MZO) emitter, the optimal efficiency for CdTe-based solar cells can be achieved, with good cell performance seen in a range of x values from 0.1 to 0.25.
Article
Optics
Ximing Rong, Youming Lu, Jiemin Yin, Hua Jiang, Shun Han, Yuxiang Zeng, Wangying Xu, Ming Fang, Peijiang Cao, Deliang Zhu, Wenjun Liu
Summary: ZnO nanorod arrays were fabricated using a solution method, with the use of a MgxZn1-xO seed layer, resulting in highly vertical-oriented ZnO nanorod arrays. The introduction of a MgZnO barrier layer effectively passivated the interface state on the ZnO side and significantly enhanced the recombination probability, leading to high efficiency electroluminescence.
JOURNAL OF LUMINESCENCE
(2022)
Article
Physics, Applied
E. Sermuksnis, J. Liberis, A. Simukovic, A. Matulionis, K. Ding, V Avrutin, U. Ozgur, H. Morkoc
Summary: Microwave noise is used to study high-electric-field electronic properties of ZnO channels, revealing a strong noise source on top of standard hot-electron noise. The study observes the self-formation of high field domains and the transition from hot-electron noise to shot noise as current increases.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Ali Ciris
Summary: This study investigated the impact of locational CdCl2 treatment on the MgZnO/CdS stacks. The application of CdCl2 to either the inter-face or the top-surface improved the grain structure of the stacks, while CdCl2 applied to both surfaces led to a porous structure. CdS and MgZnO absorption edges were observed in all stacks, along with emission bands relating to defect transitions in the MgZnO and CdS layers. The refractive index values decreased with CdCl2 treatment. The results suggest that local CdCl2 treatment has a clear effect on the structural and optical properties of MgZnO/CdS stacks.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Physics, Applied
Shengxiang Wu, Oscar Hsu-Cheng Cheng, Boqin Zhao, Nicki Hogan, Annika Lee, Dong Hee Son, Matthew Sheldon
Summary: Recent studies show that the anti-Stokes Raman signal can determine two temperatures of carriers inside the metal; The majority of the Raman signal is from inelastic scattering with carriers in a non-thermal energy distribution excited via surface plasmon damping; Experimental results demonstrate how a simple fitting procedure can reveal the plasmon dephasing time and the temperatures of hot carriers and the metal lattice.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Tianhao Wang, Ruofeng Song, Yujie Lv, Dawei Gu, Ying Yang, Wei Liu, Feng Chen
Summary: By utilizing a PVF/PVDF-coated PET substrate and a two-step swelling method, a uniform CH3NH3PbX3 nano-crystalline film was successfully grown, enhancing the stability of lead halide perovskites.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Physical
Hiroyuki Fukushima, Daisuke Nakauchi, Go Okada, Takumi Kato, Noriaki Kawaguchi, Takayuki Yanagida
Summary: Transparent and yellowish Ce-doped SrHfO3 (Ce:SHO) single crystals were successfully grown by the xenon lamp equipped floating zone method. The Ce:SHO exhibited blue luminescence with a peak wavelength of 410 nm and a decay time constant of approximately 14 ns. The photoluminescence quantum yield increased with the Ce concentration, reaching the highest value at 5%. The afterglow level was the lowest when the Ce concentration was 3%. Under 241Am alpha-ray irradiation, all the prepared Ce:SHO single crystals showed full energy peaks, with the 3% Ce:SHO sample exhibiting the highest estimated light yield.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Physics, Condensed Matter
G. Kiran, Rohan Krishna, Praveen Dwivedi, Pankaj Sharma, Rohit Singh
Summary: In this study, a novel MgZnO/ZnO MOSHEMT biosensor was designed and analyzed using an analytical model. The biosensor showed fast response and high sensitivity for detecting various biomolecules.
MICRO AND NANOSTRUCTURES
(2022)
Article
Nanoscience & Nanotechnology
Yuehua Peng, Yuan Luo, Weichang Zhou, Xuying Zhong, Yanling Yin, Dongsheng Tang, Bingsuo Zou
Summary: High-quality Sn(IV)-doped CdS nanowires were successfully synthesized via a thermal evaporation route, with XRD, Raman scattering spectrum, and photoluminescence studies confirming the effects of impurity trapping of excitons and electron-phonon coupling. The study also showed that the doping concentration of Sn(IV) could tune the intensity ratio of near bandgap emission to trapped-state emission in the nanowires, and demonstrated enhanced electron-phonon coupling in the doped CdS nanowires with the assistance of 1LO, 2LO, 4LO phonons.
NANOSCALE RESEARCH LETTERS
(2021)
Article
Chemistry, Physical
S. Kollarics, F. Simon, A. Bojtor, K. Koltai, G. Klujber, M. Szieberth, B. G. Markus, D. Beke, K. Kamaras, A. Gali, D. Amirari, R. Berry, S. Boucher, D. Gavryushkin, G. Jeschke, J. P. Cleveland, S. Takahashi, P. Szirmai, L. Forro, E. Emmanouilidou, R. Singh, K. Holczer
Summary: High concentration of negatively charged nitrogen-vacancy (NV-) centers was successfully created in diamond single crystals containing approximately 100 ppm nitrogen using electron and neutron irradiation and subsequent thermal annealing. The formation process and properties of NV- centers were observed, with about 25% of vacancies forming NVs during the annealing process, and high precision measurement of hyperfine and quadrupole coupling constants was achieved using EPR techniques.
Article
Multidisciplinary Sciences
Nadezda Varkentina, Yves Auad, Steffi Y. Woo, Alberto Zobelli, Laura Bocher, Jean-Denis Blazit, Xiaoyan Li, Marcel Tence, Kenji Watanabe, Takashi Taniguchi, Odile Stephan, Mathieu Kociak, Luiz H. G. Tizei
Summary: Tracking the lifespan of optical excitations is crucial in understanding the photophysics of materials. In this study, electron spectroscopies were used to explore the creation and decay of excitations in two representative optical materials. The developed cathodoluminescence excitation spectroscopy method allows for imaging energy transfer pathways at the nanometer scale.
Article
Multidisciplinary Sciences
Guoqing Wang, Changhao Li, Hao Tang, Boning Li, Francesca Madonini, Faisal F. Alsallom, Won Kyu Calvin Sun, Pai Peng, Federica Villa, Ju Li, Paola Cappellaro
Summary: Solid-state defects are attractive platforms for quantum sensing and simulation, but changes in density usually result in changes in spin. This study successfully controls the spin concentration while keeping fixed decoherence effects by exploiting charge transport, and characterizes the charge redistribution process using a wide-field imaging system.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Microbiology
Hanne Honerlagen, Henry Reyer, Dierck Segelke, Carolin Beatrix Maria Mueller, Marie Christin Prahl, Siriluck Ponsuksili, Nares Trakooljul, Norbert Reinsch, Bjoern Kuhla, Klaus Wimmers
Summary: This study aims to gain a deeper understanding of the genetic traits related to milk urea concentration in dairy cows, in order to optimize nitrogen emissions in breeding programs. By analyzing rumen samples from cows with different urea concentrations, the study identified differences in rumen microbial community, host transcription processes, and host-microbe interaction. The study also found that changes in dietary nitrogen had an impact on rumen microbiota and host transcript abundance.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Chemistry, Inorganic & Nuclear
Fangyi Zhao, Yuhe Shao, Zhen Song, Quanlin Liu
Summary: This study utilizes the structural confinement effect to selectively control energy transfer pathways, suppress luminescence concentration and thermal quenching, and enhance the luminescence intensity. By controlling the distances between doped ions, the energy can migrate more quickly from the quenching center to the thermally stable center, improving the thermal stability of the phosphor. This research provides a strategy for enhancing near-infrared luminescence and demonstrates the potential applications of the phosphors in night vision and optical thermometry fields.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Physics, Multidisciplinary
Tinggui Chen, Baizhan Xia, Dejie Yu, Chuanxing Bi
Summary: This study proposes a gradient phononic crystal structure for enhanced acoustic sensing. By breaking the symmetry of the PC structure, topologically protected edge states are introduced, resulting in topological acoustic rainbow trapping. The robustness and enhancement properties are verified numerically and experimentally.
