Article
Chemistry, Multidisciplinary
Na Hou, Ran Feng, Xiao-Hui Fang, Fang-Yue Du, Hai-Shun Wu
Summary: Two novel complexes were constructed by adsorbing electron-donating molecule TTF and electron-withdrawing molecule TCNQ on black phosphorus quantum dots (BPQDs), showing considerable charge transfer and strong non-covalent interaction. Density functional theory calculations revealed that introducing TTF/TCNQ groups on BPQDs can significantly enhance hyperpolarizabilities, with BPQDs-TCNQ displaying better stability and larger first hyperpolarizability compared to BPQDs-TTF. This work highlights the potential of combining TCNQ and BPQDs for high-performance nonlinear optical molecules.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Physical
Long Lin, Mengsi Lou, Shaofei Li, Xiaolin Cai, Zhengwen Zhang, Hualong Tao
Summary: This study investigates the structure and electronic properties of the two-dimensional vertical van der Waals arsenene/SnS2 heterostructure through first-principles calculations. The results show that the heterostructure has a type-II band gap, and its electronic properties can be adjusted effectively by external electric field and biaxial strain. Additionally, the heterostructure exhibits enhanced optical absorption in the visible to ultraviolet region, with absorption peaks up to 35.1% in the ultraviolet range.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Ceramics
Jie Xiong, Hong-Yan Zeng, Zhuo-Lin Yang, Jin-Feng Peng, Bin Wu, Shi-Guang Liu
Summary: In this study, a novel heteroatom-introduced Bi2WO6 photocatalyst (OV-Bi2WO6) with oxygen vacancies (OVs) was prepared. The OV-Bi2WO6 demonstrated high photocatalytic performance under visible-light, making it a promising solution for environmental remediation.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Leire Sangroniz, Yoon-Jung Jang, Marc A. Hillmyer, Alejandro J. Muller
Summary: The performance of sustainable polymers can be modified and enhanced by incorporating functional groups in the backbone of the polymer chain that increases intermolecular interactions, thus impacting the thermal properties of the material. This study investigates the role of intermolecular interactions on the crystallization of these polymers and proposes a systematic strategy to modify the thermal properties and crystallization kinetics by incorporating functional groups. The results show that the thermal transitions and crystallization kinetics of PEs can be independently tuned by varying their chemical structure.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Applied
Anchu Ashok, Anand Kumar, Janarthanan Ponraj, Said A. Mansour, Faris Tarlochan
Summary: In this study, LaMnO3 perovskite catalyst was synthesized using salt assisted combustion synthesis to control agglomeration and enhance oxygen defects, thereby improving electrochemical properties. LaMnO3-SA showed superior characteristics in oxygen electrocatalysis, displaying enhanced bifunctionality towards oxygen reduction reaction and oxygen evolution reaction. Through the introduction of an inert salt during synthesis, active sites accessible for oxygen electrocatalysis in solution combustion synthesis can be enhanced.
Article
Biochemistry & Molecular Biology
R. Deeksha, Deepak Kumar
Summary: This study investigated the properties of truxene and its nitrogen- and sulphur-substituted counterparts. The analysis showed that the di-substituted candidates were more suitable for optoelectronic applications.
JOURNAL OF MOLECULAR MODELING
(2022)
Article
Materials Science, Multidisciplinary
Xingguo Wang, Lingjia Meng, Bixuan Li, Yongji Gong
Summary: This study reviews the recent advances in introducing heteroatoms and the applications of adjusted 2D materials through various strategies like doping, intercalation, and surface modification. It discusses the potential magnetic, electric, optical, and energy-related applications of the adjusted 2D materials and summarizes the challenges in obtaining heteroatoms as opportunities for future practical and theoretical research.
Article
Chemistry, Physical
Hong Huang, Zhongqing Jiang, Xiaoning Tian, Yingying Zheng, Zhong-Jie Jiang
Summary: To overcome the limitations of noble metal Pt in terms of cost and availability, researchers have utilized hollow graphene spheres as carriers and introduced hetero-atoms such as nitrogen, iron, and cobalt to form efficient active sites. This improves the catalytic activity of the electrode material and the utilization efficiency of Pt.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Organic
Guanxing Zhu, Yujun Song, Qianyu Zhang, Weiwei Ding, Xinxin Chen, Yuannan Wang, Gang Zhang
Summary: Embedding heteroatoms in buckybowls is an effective strategy to alter their properties, with sulfur atoms in the rim and nitrogen atoms in the center allowing for tunable properties based on the state of the sulfur atoms. The electron-rich buckybowl with sulfide exhibits weak fluorescence and strong interaction with fullerene C-60, while the buckybowl with sulfonyl group shows the strongest photoluminescence and weak association behavior with fullerene C-60 due to reduced electron density.
ORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Thibaut Baron, Valentin Maffeis, Christophe Bucher, Boris Le Guennic, Akos Banyasz, Denis Jacquemin, Gerard Berginc, Olivier Maury, Chantal Andraud
Summary: This study presents the synthesis, spectroscopic, and electrochemical properties of new bis- and tetra-substituted azaboron-dipyrromethene (aza-BODIPY) dyes with electron donating groups connected to the aza-BODIPY core through a thiophene unit. Experimental measurements and theoretical calculations show that the thiophene group functions as a secondary donor group, enhancing the intramolecular charge transfer process compared to previously reported aza-BODIPY dyes. Additionally, this heterocycle can tune the oxidative potential and stabilize the electro-generated species.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Physical
Zhu Sun, Weiwei Fan, Tianquan Lin
Summary: This study proposes a method to rapidly prepare exsolution-based nanocatalysts using dielectric barrier discharge (DBD) plasma. By hydrogen plasma treatment, nanocatalysts with small particle size and high particle density can be obtained in several minutes. The treated electrodes show better electrochemical performance due to the increased active sites.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Wang Lijun, Li Xin, Hong Song, Zhan Xinyu, Wang Di, Hao Leiduan, Sun Zhenyu
Summary: Highly efficient electrochemical CO2 reduction (ECR) was achieved through tuning the interface between CdO and carbon black (CB) in CdO/CB composites. The composites exhibited a large contact area and interface, resulting in an overall ECR faradaic efficiency (FE) of 92.7% and a CO FE of 87.4%. The CdO/CB composites also demonstrated stable performance.
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
(2022)
Article
Materials Science, Ceramics
Zhonghai Yu, Xiuxia Wang, Chengyan Liu, Yiran Cheng, Zhongwei Zhang, Ruifan Si, Xiaobo Bai, Xiaokai Hu, Jie Gao, Ying Peng, Lei Miao
Summary: Ag8SnSe6-based thermoelectric materials have low carrier concentration and unsatisfactory power factor and thermal conductivity. In this study, the introduction of SnBr2 was used to increase the carrier concentration and decrease the thermal conductivity, leading to improved thermoelectric properties of Ag8SnSe6.
JOURNAL OF ADVANCED CERAMICS
(2022)
Article
Chemistry, Multidisciplinary
Chenxi Sun, Jun Ying, Yanping Zhang, Liang Jin, Aixiang Tian, Xiuli Wang
Summary: Seven polyoxometalate-based compounds were synthesized under hydrothermal conditions, exhibiting excellent electrochemical and photoelectrocatalytic properties. Compounds 1 and 4 show favorable capacitance performance, while compounds 3 and 4 can be used for the photoelectrocatalytic degradation of organic dye MB.
Article
Multidisciplinary Sciences
Jianghao Zhang, Wenda Hu, Binbin Qian, Houqian Li, Berlin Sudduth, Mark Engelhard, Lian Zhang, Jianzhi Hu, Junming Sun, Changbin Zhang, Hong He, Yong Wang
Summary: In this study, the authors demonstrate that coordinating Pd with alkenyl-type ligands creates an electron-rich environment for selective hydrogenation. The method of forming homogeneous-like Pd catalyst structure with noble metals is crucial for inhibiting side reactions in hydrotreating processes.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Applied
Pin-Zhen Jia, Zhong-Xiang Xie, Yuan-Xiang Deng, Yong Zhang, Li-Ming Tang, Wu-Xing Zhou, Ke-Qiu Chen
Summary: This paper investigates the thermoelectric performance of two-dimensional (PbX)(2) (X = S, Se, Te) monolayers using first-principles calculations and Boltzmann transport theory. The results show that applying a biaxial tensile strain significantly enhances the thermoelectric performance, mainly due to the reduced phonon thermal conductivity. The excellent ZT value of the p-type (PbX)(2) (X = S, Se, Te) monolayers suggests their potential application in the thermoelectric field, and external strain has a promising prospect in enhancing their performance.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Cheng-Wei Wu, Xue Ren, Guofeng Xie, Wu-Xing Zhou, Gang Zhang, Ke-Qiu Chen
Summary: In this study, the thermoelectric properties of semiconductor BiOCl crystals were accurately predicted, and it was found that applying in-plane biaxial tensile strain can further enhance its performance, making it an excellent high-temperature thermoelectric material.
PHYSICAL REVIEW APPLIED
(2022)
Article
Chemistry, Physical
Xingxing Jiang, Zhengwei Xu, Yueshao Zheng, Jiang Zeng, Ke-Qiu Chen, Yexin Feng
Summary: The excited state behavior and dynamics of carriers in Sb2S3 materials were systematically analyzed using first-principles calculations. Intrinsic defects such as sulfide vacancies were found to cause a large Stokes shift, leading to a reduction in the efficiency of solar cells.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Physics, Applied
Bowen Zeng, Zhong-Ke Ding, Hui Pan, Nannan Luo, Jiang Zeng, Li-Ming Tang, Ke-Qiu Chen
Summary: Phonon hydrodynamics, a collective motion of phonons, has recently attracted attention due to its extended temperature window in layered materials. This study demonstrates that the phonon hydrodynamic window in bilayer graphene can be strongly altered by strain.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Condensed Matter
Huapeng Cai, Xin Wang, Yueshao Zheng, Xing-xing Jiang, Jiang Zeng, Yexin Feng, Keqiu Chen
Summary: Researchers have reported several stable phases of erbium-nitrogen compounds ErN(x) as high-energy-density materials. Phase diagrams of stable high-pressure structures Immm-ErN2, C2-ErN3, P(sic)4, and P(sic)6 are theoretically studied, and the N-N bonds in these compounds are stabilized as diatomic quasi-molecule N-2, helical-like nitrogen chains, armchair nitrogen chains, and armchair-anti-armchair nitrogen chains, respectively. The P(sic)6 phase exhibits excellent stability at high temperatures up to 1000K and outstanding explosive performance with a high-energy-density of 1.30 kJ g(-1), detonation velocity of 10.87 km s(-1), and detonation pressure of 812.98 kbar, showing promising prospects as high-energy-density materials.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Physics, Multidisciplinary
Ran He, Dan Wang, Nannan Luo, Jiang Zeng, Ke-Qiu Chen, Li-Ming Tang
Summary: In this study, nonrelativistic spin-momentum coupling is predicted in two-dimensional materials. Twist operations in antiferromagnetic bilayers can induce spin splitting comparable to spin-orbit coupling, and generate a transverse spin current with a high charge-spin conversion ratio. These findings demonstrate the potential for achieving electrically controlled magnetism in materials without spin-orbit coupling.
PHYSICAL REVIEW LETTERS
(2023)
Review
Physics, Condensed Matter
Shihua Tan, Jiang Zeng, Xiaofang Peng, Ke-Qiu Chen
Summary: In recent years, there has been a growing interest in organic thermoelectric materials that are cost-effective, efficient, lightweight, and environmentally friendly. Advances in experimental measurement techniques and theoretical calculations have made it possible to study the thermoelectric properties of molecular devices. Various strategies have been proposed to regulate these properties. This paper reviews the theoretical analytical and experimental research methods used to investigate these properties, with a focus on two tuning strategies - side substitution and quantum interface effects - that have shown significant improvements in the thermoelectric performance of molecular devices. The challenges faced in experimental and theoretical studies, as well as the future prospects of molecular thermoelectric devices, are also discussed.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Review
Chemistry, Physical
Bingyue Li, Zude Xie, Hanzhong Liu, Liming Tang, Keqiu Chen
Summary: In this paper, we summarize the research progress of ultrathin piezoelectric films as key materials for miniaturized energy transducers. At the nanoscale, even a few atomic layers, ultrathin piezoelectric films exhibit shape anisotropic polarization, including in-plane polarization and out-of-plane polarization. We first introduce the mechanism of in-plane and out-of-plane polarization, and then summarize the main ultrathin piezoelectric films studied currently. Furthermore, we discuss the existing scientific and engineering problems in the research of polarization, as well as their possible solutions, using perovskite, transition metal dichalcogenides, and Janus layers as examples. Finally, we provide a summary of the application prospect of ultrathin piezoelectric films in miniaturized energy converters.
Article
Physics, Applied
Xue-Kun Chen, En -Ming Zhang, Dan Wu, Ke-Qiu Chen
Summary: The study reveals the importance of four-phonon scattering in phonon transport, as the thermal conductivity of Cu4TiSe4 is reduced by about 40% after considering four-phonon scattering at room temperature. Additionally, the high dispersion and valley degeneracy in the electronic structure result in a high power factor. By applying triaxial tensile strain, the ZT value of Cu4TiSe4 can be further enhanced to 2.2 through remarkably enhanced four-phonon scattering processes. The suppression of thermal conductivity allows for the reduction of the optimal carrier concentration for the ZT peak, which is significant for practical preparation of Cu4TiSe4-based TE devices.
PHYSICAL REVIEW APPLIED
(2023)
Article
Physics, Applied
Wei-Hua Xiao, Bowen Zeng, Zhong-Ke Ding, Hui Pan, Wen-Wen Liu, Qiu-Qiu Li, Kaike Yang, Nannan Luo, Jiang Zeng, Ke-Qiu Chen, Li-Ming Tang
Summary: In this work, the transport properties of monolayer group-IV monochalcogenides (MX, M = Ge, Sn; X = S, Se, and Te) were studied using first-principles calculations and the Boltzmann transport formalism. It was found that GeTe and SnTe have exceptionally high hole mobilities, reaching 835 and 1383 cm(2)/V s, respectively, at room temperature. Moreover, the hole mobilities increase with the increase in the atomic number of X in MXs when M remains the same. This study provides insight into the phonons, charge density of states, and mobility, and suggests that monolayer GeTe and SnTe are promising p-type semiconductors in nanoelectronics.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Hui Pan, Zhong-Ke Ding, Bo -Wen Zeng, Nan -Nan Luo, Jiang Zeng, Li -Ming Tang, Ke-Qiu Chen
Summary: We present a new ab initio Boltzmann transport approach that considers both magnon-phonon scattering (MPS) and three-phonon scattering to accurately analyze the thermal transport properties of ferromagnetic crystals. By applying this approach to the body-centered cubic iron, we find that phonons dominate the thermal conduction at high temperatures, while magnons play a role only at low temperatures. Additionally, the abnormal increase in magnon thermal conductivity at high temperatures suggests the dominance of other magnon-involved scattering events instead of MPS. Furthermore, our analysis reveals the possibility of hydrodynamic heat transport at low temperatures.
Article
Chemistry, Multidisciplinary
Cheng-Wei Wu, Hui Pan, Yu-Jia Zeng, Wu-Xing Zhou, Ke-Qiu Chen, Gang Zhang
Summary: In this study, a new mechanism to enhance interfacial thermal conductance using nano-phononic metamaterials was demonstrated, using GaN-AlN contact as an example. It was found that although constructing a superlattice can tune the thermal conductance, it cannot enhance it. By constructing an interfacial nano phononic metamaterial, it was suggested that the thermal conductance can be enhanced by 9%.
Article
Chemistry, Physical
Shiyu Shen, Xingxing Jiang, Yueshao Zheng, Xiong-Xiong Xue, Yexin Feng, Jiang Zeng, Ke-Qiu Chen
Summary: Using first-principles calculations, we investigated the interaction between intercalated Li-ions and electron polarons in rutile TiO2 materials. Our analysis showed that the diffusion barrier of electron polarons decreases around Li-ions. The interaction between Li-ions and polarons benefits their synergistic diffusion in both pristine and defective rutile TiO2 systems.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Zhong-Ke Ding, Yu-Jia Zeng, Hui Pan, Nannan Luo, Jiang Zeng, Li -Ming Tang, Ke-Qiu Chen
Summary: This study demonstrates the importance of the acoustic sum rule (ASR) in evaluating the topological acoustic edge states in graphene and discovers new topological phonon modes. These findings are significant for the method of searching for topological phonon states and the design of phononic devices.
Article
Chemistry, Physical
Xingxing Jiang, Zhengwei Xu, Yueshao Zheng, Jiang Zeng, Ke-Qiu Chen, Yexin Feng
Summary: This study investigates the formation mechanism of intrinsic self-trapped excitons in one-dimensional organic perovskite systems and identifies the low electronic dimension and potential well formed by local distortion as the origin of exciton self-trapping. Furthermore, it is found that breaking the central inversion symmetry greatly improves the transition probability of electrons.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)