Article
Chemistry, Physical
Pengfei Hou, Yuhong Huang, Fei Ma, Gangqiang Zhu, Jianmin Zhang, Xiumei Wei, Peiyuan Du, Jing Liu
Summary: In this study, single-atom catalysts consisting of transition metal atoms anchored on defective silicene were designed for electrocatalytic ammonia synthesis. Among the 28 catalysts tested, Cr@D-silicene exhibited excellent performance in N-2 adsorption, selectivity, and catalytic activity of nitrogen reduction reaction (NRR). The electronic properties of Cr@D-silicene were investigated to understand why it is qualified for NRR in terms of strong interaction between N-2 and Cr, continuous activation of N-2 molecule, charge transfer, and distribution. This work suggests a new approach for electrocatalytic ammonia synthesis using single-atom catalysts.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Crystallography
Kejing Zhu, Heng Wang, Yuying Zhu, Yunyi Zang, Yang Feng, Bingbing Tong, Dapeng Zhao, Xiangnan Xie, Kai Chang, Ke He, Chong Liu
Summary: This article describes a study that simplifies and improves the fabrication method of FeSe superconducting films. By using a Se cracking source to enhance the reactivity of the Se flux, it is found that a FeSe film with a stoichiometric ratio close to 1 can be obtained under the appropriate Se/Fe flux ratio. The optimized FeSe film exhibits high-temperature superconductivity without any post-growth treatment.
Article
Energy & Fuels
S. Ma, R. Tong, X. Y. Wu, Z. P. Li, X. Y. Kong, W. Z. Shen
Summary: The study found that introducing SiNx films with a high refractive index and additive oxide films is beneficial in reducing the rear PID effect in bifacial p-Si PERCs. By using a combined structure of stack films as the rear passivation layer, both front-side and rear-side efficiency can be improved significantly, while reducing the power loss associated with rear PID.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Materials Science, Multidisciplinary
Fangkun Tian, Likun Ai, Anhuai Xu, Hua Huang, Ming Qi
Summary: In this study, the effects of growth conditions on material quality of quinary alloy InGaAsPBi using GSMBE were systematically investigated. It was found that 0.1% Bi incorporation acted as a surfactant, improving material quality. The surface roughness measured by AFM was 0.218 nm and the addition of bismuth atoms promoted the binding of phosphorus atoms to group III atoms.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Chemistry, Organic
Yuan Yang, Bingyang Han, Fenghao Dong, Jiawei Lv, Huiming Lu, Yuqing Sun, Ziqiang Lei, Zengming Yang, Hengchang Ma
Summary: In this study, O-18-labeled aromatic aldehydes (3a-3x) were successfully obtained with high total yields (52-72%) and sufficient O-18 abundance (90.90-96.09%) using the reversed Knoevenagel reaction. This work is of great importance for the labeling and research of organic substances.
Article
Materials Science, Multidisciplinary
Jiahui Pan, Xing Fan, Kedong Zhang, Zhiming Geng, Jinshan Yao, Yu Deng, Jian Zhou, Xue-Jun Yan, Ming-Hui Lu, Hong Lu, Yan-Feng Chen
Summary: Interface, an important concept in thermal transport research, has been studied by modifying the morphology and thermal resistance of an Al/GaAs interface with ErAs. Observed transitions of phonon behaviors were achieved by altering the thickness of ErAs.
MATERIALS TODAY PHYSICS
(2022)
Article
Chemistry, Physical
Danhao Wang, Ding Wang, Peng Zhou, Mingtao Hu, Jiangnan Liu, Shubham Mondal, Tao Ma, Ping Wang, Zetian Mi
Summary: Through high-resolution X-ray photoelectron spectroscopy measurements, we discovered a thick oxide layer on ScAlN when exposed to air, which significantly affects its characterization and electronic structure evaluation. By excluding the possible impact from the surface oxide layer, the band alignment of Sc0.18Al0.82N/GaN can be accurately determined. Simulation results further demonstrate that the Sc0.18Al0.82N barrier layer offers excellent charge carrier confinement and a high density of two-dimensional electron gas (2DEG) at the heterostructure interface, crucial for high-performance GaN-based high electron mobility transistors (HEMTs).
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Mohamed-Amine Guerboukha, Matthieu Petit, Aurelie Spiesser, Alain Portavoce, Omar Abbes, Vasile Heresanu, Sylvain Bertaina, Cyril Coudreau, Lisa Michez
Summary: This study investigated the stability of manganese germanide thin films grown on Ge(111) substrates using three different growth methods. It was found that different phases of thin films can be formed depending on the growth processes, and the phase formation sequence was explained by considering the kinetic and thermodynamic processes involved. In situ X-ray diffraction was used to determine the tuning phase formation of the manganese germanide thin films.
Article
Green & Sustainable Science & Technology
Zhili Du, Boqiang Lin, Minyang Li
Summary: This paper explores the substitution relationship between energy and other production factors to analyze energy efficiency. It is found that capital can be a more effective and sustainable substitute for energy. Additionally, carbon tax plays a significant role in saving energy consumption and reducing carbon emissions.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Multidisciplinary
Zhi-Mo Zhang, Ben-Chao Gong, Jin-Hua Nie, Fanqi Meng, Qinghua Zhang, Lin Gu, Kai Liu, Zhong-Yi Lu, Ying-Shuang Fu, Wenhao Zhang
Summary: By self-intercalating Fe atoms into the van der Waals gap of FeSe2 using molecular beam epitaxy, we successfully constructed kagome-like structures. The resulting Fe5Se8 stoichiometry was observed using low-temperature scanning tunneling microscopy, showing the emergence of a 2 x 2 ordered Fe atom arrangement. The kagome pattern mainly originates from the slight reconstruction of topmost Se atoms due to the non-equivalent subsurface Fe sites caused by intercalation. This study presents an alternative approach for constructing artificial kagome structures, opening up possibilities for exploring correlated quantum states.
Article
Energy & Fuels
Riku Isoaho, Antti Tukiainen, Juuso Puutio, Arttu Hietalahti, Jarno Reuna, Antti Fihlman, Elina Anttola, Miika Keranen, Arto Aho, Mircea Guina
Summary: This study reports a comprehensive optimization process for GaInNAsSb solar cells grown by molecular beam epitaxy. The results show that the quantum efficiency and current generation of narrow gap materials can be significantly improved by increasing the growth temperature and reducing the As/III beam equivalent pressure ratio. It is also found that increasing the Sb flux can improve the material quality and inhibit phase separation.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Crystallography
Ying-Chieh Wang, Ikai Lo, Yu-Chung Lin, Cheng-Da Tsai, Ting-Chang Chang
Summary: Mg-doped GaN was grown using plasma-assisted molecular beam epitaxy (PAMBE) on a Fe-doped GaN template substrate with a shutter-controlled process. The relationship between the N/Ga flux ratio and the transition from n-type to p-type conductivity of Mg-doped GaN was studied. The presence of Mg flux improved crystal quality and carrier mobility by preventing the formation of structural defects in GaN epi-layers.
Article
Astronomy & Astrophysics
Jack Fraser, Ralph Schonrich
Summary: This article introduces a high-performance analytical model of Galactic Chemical Evolution, which can search the parameter space associated with the neutron enrichment process and concludes that neutron star mergers are the main contributors to the modern Milky Way neutron abundance.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Physics, Applied
Muhamad Mustofa, Seiya Mishima, Katsuhiko Saito, Qixin Guo, Tooru Tanaka
Summary: P-doped ZnTe thin films were grown using InP as the P source by MBE on ZnTe (100) substrates. SIMS analysis revealed that the P concentration in the films increased with increasing InP flux, accompanied by In incorporation. To suppress the In incorporation, the outlet of the InP cell was modified. The modified outlet successfully decreased the In concentration by three orders of magnitude, while the P concentration also decreased by one order of magnitude. An acceptor-bound exciton (I-a) peak at 2.36 eV was observed in the P-doped ZnTe thin film grown with a modified outlet, and the I-a intensity increased after annealing, indicating the activation of P acceptors.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2023)
Article
Environmental Sciences
Hee-Jun Kim, Chan-Hee Won, Yeong-Pyo Hong, In Ho Lee, Hyun-Woo Kim
Summary: This study demonstrates that non-thermal plasma (NTP) technology can effectively degrade microalgal toxins produced by cyanobacteria and reduce their concentration, bringing positive impacts on aquatic ecosystem and human health.
