Article
Chemistry, Multidisciplinary
Huan Lin, Zhiyun Ma, Jiwu Zhao, Yang Liu, Jinquan Chen, Junhui Wang, Kaifeng Wu, Huaping Jia, Xuming Zhang, Xinhua Cao, Xuxu Wang, Xianzhi Fu, Jinlin Long
Summary: The design and synthesis of semiconducting bolaamphiphiles BENI-COO- and BENI-NH3+ for biomimetic hydrogen evolution were presented, achieving a high H-2 evolution rate and apparent quantum efficiency. The photoexcited BENI-COO- nanofibers tunneled hot electrons to molecular Ni collectors at a faster rate compared to BENI-NH3+ nanoribbons, with the electric field significantly benefiting electron tunneling dynamics and compensating for charge-separated states.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Metallurgy & Metallurgical Engineering
Shuhui Lv, Qiang Yang, Fanzhi Meng, Jian Meng
Summary: This study investigates the instantaneous reactions of Al, Mn, Zn, Zr, and Y with Ni to understand their mechanisms in removing Ni impurity. The results reveal the formation of Al4NiY and Al4Ni(Y,Zr) intermetallic phases, which efficiently remove Ni and settle at the bottom of the melt. Adding Y to Mg-Al based alloys also contributes to the removal of Fe and Ni, improving the alloys' corrosion resistance and strength.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Physics, Multidisciplinary
I. N. Yakovkin, N. Petrova
Summary: The study reveals that spin-orbit coupling significantly affects the band structures of heavy IV-VI semiconductors, potentially leading to band inversion for topological insulator formation. However, the absence of surface states providing metallicity in thin films raises doubts about the formation of topological crystalline insulators in IV-VI compounds.
Article
Materials Science, Multidisciplinary
Isaac Soltero, Jonathan Guerrero-Sanchez, Francisco Mireles, David A. Ruiz-Tijerina
Summary: We present the theoretical electronic spectra of twisted phosphorene bilayers with moiré patterns, calculated using a continuous approximation to the moiré superlattice Hamiltonian. Three distinct regimes for P-point electrons and holes at different twist angle ranges are predicted: a Hubbard regime for small twist angles (0 < 2), a Tomonaga-Luttinger regime at intermediate twist angles (2 degrees < theta < 10 degrees), and a ballistic regime at large twist angles (0 > 10). Our method provides accurate results similar to large-scale ab initio calculations, but with lower computational cost and fewer restrictions on twist angles.
Article
Environmental Sciences
Min Zhong, Meng Li, Bin Tan, Bin Gao, Yue Qiu, Xiaonan Wei, Huiru Hao, Zhixuan Xia, Qian Zhang
Summary: By modifying millet bran biochars with different inorganic compounds, this study found that the modified biochars exhibited better Cr(VI) reduction capacity. After adding lactate, the Cr(VI) removal efficiency of all biochars was significantly enhanced, possibly due to the bridging effect of lactate facilitating electron transfer between biochars and Cr(VI).
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
Yohei Kojima, So Sugiura, Keiji Suzuki, Yilihamu Yisilamu, Katsuhiko Ono
Summary: In this study, bis(dioxaborin) compounds with extended pi-conjugated systems were synthesized and found to exhibit red-shifted absorption maxima, high electron affinity, and reduced on-site Coulomb repulsion in the two-electron reduction. An OFET fabricated using one of these compounds with a layer-by-layer crystal structure demonstrated n-type semiconductor behavior.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Article
Multidisciplinary Sciences
Michal Papaj, Cyprian Lewandowski
Summary: Understanding strongly correlated states in flat-band materials is a major focus for both experimental and theoretical research. While various techniques have been successful in studying the properties of the order, the exact nature of the ground state remains unknown. In this study, we propose using strong light-matter coupling in flat-band systems to gain insight into the many-body ground state through dynamical dielectric response. We demonstrate that the plasmon spectrum and dynamical dielectric response are susceptible to the underlying order, providing valuable insights into interaction-driven band gaps, spin structure, and order periodicity.
Article
Engineering, Electrical & Electronic
Brandon S. McKeon, Xinyu Liu, Jacek K. Furdyna, David J. Smith
Summary: The structure of misfit dislocations (MDs) at heterovalent II-VI/III-V (001) compound semiconductor interfaces has been determined using aberration-corrected electron microscopy. The study revealed that MDs at interfaces with different lattice mismatches exhibit different dislocation structures and core compositions, as well as substantial interfacial intermixing.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jiayu Wang, Xiaowei Zhan
Summary: Fullerene derivatives, as classic electron acceptor materials for organic solar cells, have drawbacks that restrict further development. The exploration of nonfullerene acceptors has made significant progress, breaking the efficiency limit and promoting the field's advancement.
CHINESE JOURNAL OF CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Bence Bernath, Papori Gogoi, Andrea Marchese, Dmytro Kamenskyi, Hans Engelkamp, Denis Arslanov, Britta Redlich, Peter C. M. Christianen, Jan C. Maan
Summary: This study reports the observation of cyclotron resonance transitions of holes in gallium-doped germanium at low temperatures. Intense, pulsed THz free-electron laser radiation is used to create free holes and induce their cyclotron resonance. The CR peaks of the holes shift to higher (or lower) magnetic field with increasing laser intensity.
Article
Metallurgy & Metallurgical Engineering
Takuma Kishimoto, Peihua Du, Tsuyoshi Furushima
Summary: The crystal orientation and outer surface roughness of magnesium alloy tubes were evaluated to investigate the effect of the mandrel in die-less mandrel drawing. The results showed that the outer surface became rougher in the die-less mandrel drawing compared to die-less drawing. The roughness development was attributed to the difference in the pyramidal slip system Schmid factor. Furthermore, crystal grains with the {2 1 over bar 1 over bar 0} crystal plane had a larger Schmid factor and contributed to the increased roughness in the die-less mandrel drawing. These findings are significant for the development of fabrication processes that produce microtubes with high surface quality.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Physics, Multidisciplinary
Bowen Hou, Dan Wang, Bradford A. Barker, Diana Y. Qiu
Summary: Through ab initio calculations, we identify multiple series of chiral excitons in Bi2Se3 that exhibit both bulk and surface characteristics, and their coupling to light may potentially affect the topological protection of surface states due to exchange-driven mixing. These findings are crucial for understanding the influence of electron-hole interactions on surface states and the complex intermixture of bulk and surface states excited in optical measurements and their coupling to light.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Physical
A. Y. Tupchaya, L. Bondarenko, A. A. Yakovlev, Y. E. Vekovshinin, A. N. Mihalyuk, D. Gruznev, N. S. Denisov, A. Matetskiy, A. Yu Aladyshkin, A. Zotov, A. A. Saranin
Summary: We have successfully synthesized and characterized a new 2D compound consisting of a magnesium network sandwiched between a lead atomic layer and a silicon (111) substrate. The electronic structure of this compound is similar to that of the Pb/Si(111) system. The presence of magnesium intercalation leads to band bending and an enhancement in the electron-phonon coupling constant. Our measurements of surface resistance suggest the occurrence of a superconducting phase transition and we estimated the critical temperature of superconductivity.
APPLIED SURFACE SCIENCE
(2022)
Review
Chemistry, Multidisciplinary
Swagat K. Mohapatra, Seth R. Marder, Stephen Barlow
Summary: This article discusses the development of relatively stable but highly reducing n-dopants based on dimers formed by 19-electron organometallic complexes and organic radicals. These dimers can be used to increase the conductivity and lower the charge carrier injection and extraction barriers of organic semiconductors. Various synthesis methods and the thermodynamic redox potentials of these dimers are discussed, as well as their application in doping a wide range of semiconductors through vacuum and solution processing. The role of photoactivation in extending the reach of one of these dopants is also highlighted.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Zhihang Xie, Qing Liu, Kuan- Lee, Wang Zhu, Liberty T. Wu, Rudder T. Wu
Summary: This study aims to investigate the relationship between the roughness of the bond coat and the CMAS corrosion resistance of EB-PVD thermal barrier coatings. The results show that reducing the roughness of the bond coat contributes to the improved formation of the EB-PVD YSZ columns, thereby enhancing the coating's CMAS corrosion resistance.
