Article
Chemistry, Physical
Jiwei Dong, Bei Zhang, Shidong Zhang, Yaoxing Sun, Mengqiu Long
Summary: By utilizing DFT and NEGF methods, this study systematically investigated the thermoelectric transport properties of black phosphorus nanoribbons with F4TCNQ adsorption. The results showed enhanced thermoelectric performance and power due to the adsorption of F4TCNQ molecules, providing potential applications in thermoelectric field.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Kendahl L. Walz Mitra, Christine H. Chang, Michael P. Hanrahan, Jiaying Yang, Daniel Tofan, William M. Holden, Niranjan Govind, Gerald T. Seidler, Aaron J. Rossini, Alexandra Velian
Summary: Surface functionalization of few-layer black phosphorus nanosheets using photolytically generated nitrenes was introduced in this study. A variety of characterization techniques were employed to investigate the chemical structure of the modified nanosheets, conclusively identifying the presence of iminophosphorane units on the nanosheet surface.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Materials Science, Multidisciplinary
Yuqiang Wu, Jingang Wang, Mengtao Sun, Mingyan Chen, Lei Zhang
Summary: This study calculated the current-voltage characteristic curves, conductivity, real space charge distribution, transmission spectrum, photocurrent, and thermal current of the borophene-black phosphorus heterostructure. The results indicate that the zigzag device shows excellent photocurrent characteristics, with the direction of photocurrent adjustable by changing the wavelength of incident light and adding gate voltage. The armchair device exhibits excellent IV curve characteristics and good linear characteristics at low voltage, and also demonstrates good thermoelectric current properties. The distribution of covalent bonds formed between atoms in this heterostructure is revealed by the real space charge distribution. Our results are significant for the application of borophene-black phosphorus heterostructure in electric transport devices.
RESULTS IN PHYSICS
(2023)
Review
Materials Science, Multidisciplinary
Yajuan Liu, Muqing Chen, Shangfeng Yang
Summary: Black phosphorus (BP) as an emerging two-dimensional material has wide applications in various fields, but its ambient stability needs to be enhanced due to oxidation. Chemical functionalization is an effective method for improving the stability of few-layer BP, with covalent and noncovalent functionalization being key approaches. This review provides a comprehensive overview of the chemical functionalization of BP, highlighting the impact on electronic properties and ambient stability, and discussing future challenges and developments.
Article
Engineering, Environmental
Tingting Liang, Syama Lenus, Aiqin Wang, Thangavel Sakthivel, Jingpei Xie, Zhengfei Dai
Summary: Low-dimensional black phosphorus has great potential in electronics, optoelectronics, and catalysts due to its high carrier mobility and controllable band gap. However, its low intrinsic activity and weak stability hinder its application as an efficient electrocatalyst. Various strategies, such as doping, heterostructure building, and functionalization, have been explored to enhance the performance of black phosphorus-based catalysts for hydrogen evolution reaction, oxygen evolution reaction, and overall water splitting.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Nanoscience & Nanotechnology
Changqing Wang, Qing He, Peng Guo, Haoqiang Qi, Jianfeng Su, Weiguang Chen, Chunjuan Tang, Yu Jia
Summary: Based on first-principles calculations, the friction anisotropy, structural super-lubricity, and oxidation-induced ultra-low friction of black phosphorus at atomic scale under different loads have been studied. The results reveal that the interface friction of black phosphorus is anisotropic, with greater friction along the armchair direction than the zigzag direction. Additionally, the friction between black phosphorus interfaces exhibits a structural superlubricity property, with incommensurate interface friction approximately one thousandth of the commensurate interface friction, primarily due to the lower electronic charge and smaller amplitude of electronic charge change between incommensurate interfaces during the friction process. Furthermore, the oxidation of black phosphorus enhances lubrication between interfaces.
Article
Chemistry, Physical
Shutao Li, Pengfei Wang, Haoxu Zhao, Rendong Wang, Ruisen Jing, Zilin Meng, Wenzhi Li, Zhilei Zhang, Yunyan Liu, Qian Zhang, Zhao Li
Summary: Researchers have explored a novel photocatalyst by passivating BP nanosheets with PDDA and combining them with BiOBr through a co-precipitation method, enhancing carrier transporting efficiency and inhibiting carrier recombination. This has led to increased light absorption and photocatalytic activity, significantly improving the degradation effects towards methylene orange and ciprofloxacin. The findings demonstrate a new approach in designing solar light driven photocatalysts.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Materials Science, Multidisciplinary
Pengfei Ou, Xiao Zhou, Xiao-Yan Li, Yiqing Chen, Cheng Chen, Fanchao Meng, Jun Song
Summary: An ab initio density functional theory study was conducted to investigate the potential of single-walled black phosphorus nanotubes (BPNTs) for sensing toxic gas molecules. The results showed that BPNTs exhibited similar adsorption energy to these molecules, but a stronger interaction with NO2. The electronic properties of BPNTs were significantly altered by the adsorption of NO2, resulting in a metallic system. The curvature of BPNTs also influenced the adsorption of NO2. Therefore, BPNTs could be promising building blocks for high-performance gas sensors in detecting NO2.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Chenxi Li, Eliezer F. Oliveira, Abhijit Biswas, Anand B. Puthirath, Xiang Zhang, Atin Pramanik, Elias J. Garratt, Mahesh R. Neupane, Bradford B. Pate, Anthony Glen Birdwell, Tony G. Ivanov, Tanguy Terlier, Robert Vajtai, Pulickel M. Ajayan
Summary: Diamond surface functionalization has attracted significant research interest, particularly H-termination due to its ability to enhance surface conductivity. This study focused on exploring the attachment of different functional groups, such as nitrogen and sulfur heteroatoms, on the diamond surface and their impact on electronic structure. The functionalized diamond surfaces were found to possess higher conductivity than H-terminated diamonds and showed a downshift in the conduction band minimum and valence band maximum, indicating a reduced bandgap. These findings suggest the potential of heteroatom functionalizations on diamond surfaces for various electronic applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Biochemistry & Molecular Biology
Aidar M. Kuchkaev, Airat M. Kuchkaev, Aleksander V. Sukhov, Svetlana V. Saparina, Oleg I. Gnezdilov, Alexander E. Klimovitskii, Sufia A. Ziganshina, Irek R. Nizameev, Igor P. Asanov, Konstantin A. Brylev, Oleg G. Sinyashin, Dmitry G. Yakhvarov
Summary: Two-dimensional black phosphorus (BP) is a promising material for various applications, and its chemical functionalization is crucial for improving stability and enhancing intrinsic electronic properties. In this study, a facile method for simultaneous electrochemical exfoliation and methylation of BP was developed. The use of iodomethane during cathodic exfoliation allowed the generation of highly reactive methyl radicals, which reacted with the electrode's surface to yield functionalized BP nanosheets. The functionalization was confirmed by various microscopic and spectroscopic methods, with a degree of 9.7% estimated by solid-state P-31 NMR spectroscopy analysis.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Lihao Su, Ya Wang, Zhongyu Wang, Siyu Zhang, Zijun Xiao, Deming Xia, Jingwen Chen
Summary: Layered black phosphorus (BP) has great potential in various fields, but the interactions and parameters of BP adsorption with organics are lacking. In this study, molecular dynamic and density functional theory were used to calculate the energy and equilibrium constants of organics adsorbed onto BP. Gaseous phase adsorption was found to be more favorable than aqueous phase, and the affinity of aromatics to BP was similar to graphene. The established polyparameter linear free energy relationship model effectively predicted the adsorption capacity of organics onto BP.
Article
Chemistry, Multidisciplinary
Lei Zhang, Zhe-Ji Wang, Bo Ma, Xiang-Yang Li, Yu-Chi Dai, Guowen Hu, Yong Peng, Qiang Wang, Hao-Li Zhang
Summary: This study reports a covalent modification method for liquid-phase exfoliated BP nanosheets based on a rational analysis of the BP structure. The modification is achieved using carbene as the modifying agent, improving the solubility and stability of BP nanosheets. Detailed characterization and theoretical calculations reveal the reaction mechanism and chemical properties of the modified BP.
CHINESE CHEMICAL LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Lipeng Zhu, Yuanyuan Huang, Chuan He, Yue Wu, Yixuan Zhou, Zeyu Fan, Jun Dong, Kai Zhang, Xinlong Xu
Summary: Experimental results demonstrate that anisotropic second-order nonlinear optical effects can be observed at the surface of black phosphorus with inversion symmetry breaking, serving as an alternative terahertz emitter. The oxidation process at the surface can protect the terahertz surface emission from the bulk black phosphorus crystals. The radiation mechanism reveals that second-order nonlinear optical effects can occur at the surface of bulk black phosphorus crystals.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2021)
Article
Physics, Condensed Matter
Michael F. Herbst, Antoine Levitt
Summary: A new preconditioner based on the local density of states has been proposed for solving the self-consistent problem in Kohn-Sham density functional theory. It is cost-effective and addresses the issue of long-range charge sloshing in large, inhomogeneous systems. The preconditioner is applicable to metals, insulators, and semiconductors, and has been successfully tested on various types of inhomogeneous systems.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Chemistry, Multidisciplinary
Xuwei Cui, Wenlong Dong, Shizhe Feng, Guorui Wang, Congying Wang, Shijun Wang, Yekai Zhou, Xiaohui Qiu, Luqi Liu, Zhiping Xu, Zhong Zhang
Summary: Strain is an effective strategy to modulate the properties of 2D materials. Researchers have developed a novel rectangular-shaped bulge device to uniaxially stretch membranes and detect orientation-dependent properties of anisotropic 2D materials.
Article
Chemistry, Physical
Fu Huang, Feier Fang, Yue Zheng, Qi You, Henan Li, Shaofan Fang, Xiangna Cong, Ke Jiang, Ye Wang, Cheng Han, Wei Chen, Yumeng Shi
Summary: In this study, an optically-stimulated artificial synapse has been demonstrated using a heterostructure of Cs2AgBiBr6 perovskite and IGZO thin film. The heterostructure significantly enhances the photoresponse and synaptic plasticity, enabling the realization of various synaptic behaviors and achieving a high accuracy rate for pattern recognition in an artificial neural network simulation.
Article
Chemistry, Physical
Haotian Lu, Chunpeng Yang, Feifei Wang, Lu Wang, Jinghong Zhou, Wei Chen, Quan-Hong Yang
Summary: Lithium metal anodes have great potential for high-energy-density secondary batteries. However, uncontrolled lithium dendrite growth inhibits their practical application. This study proposes an interfacial high-concentration electrolyte induced by nitrogen- and oxygen-doped carbon nanosheets (NO-CNS) to stabilize lithium metal anodes. The interfacial high-concentration electrolyte improves charge transfer kinetics and ionic mass-transfer, leading to excellent electrochemical performance.
Article
Chemistry, Physical
Haidong Liang, Yue Zheng, Leyi Loh, Zehua Hu, Qijie Liang, Cheng Han, Michel Bosman, Wei Chen, Andrew A. Bettiol
Summary: In this study, efficient n-type doping of 2D TMDs was achieved through ion beam irradiation, and the doping effect remained stable even after one year of exposure to ambient conditions. Furthermore, high-performance homogenous p-n junction diodes were fabricated using localized ion irradiation.
Review
Optics
Yiduo Wang, Yingwei Wang, Jun He
Summary: Family of MXenes, the 2D transition metal carbides, nitrides, and carbonitrides, has gained significant attention due to their tunable optical, electronic, electrochemical, and mechanical properties, leading to the emergence of compact nonlinear optical (NLO) devices. MXenes, as a novel 2D materials system, not only possess the advantages of classical 2D materials for NLO applications, but also demonstrate unique superiority such as high yield and scalable synthesis, stability, and switchable NLO response. This article provides a comprehensive overview of MXenes nonlinear optics, covering synthesis, linear and NLO properties, NLO applications, as well as challenges and future prospects of MXenes NLO research.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Physical
Li Zhou, Jianlong Kang, Yulan Dong, Yiduo Wang, Yejun Li, Han Huang, Si Xiao, Yingwei Wang, Jun He
Summary: Featured with high thermal decomposition temperature and layered structure, violet phosphorus (VP) has demonstrated high-performance optoelectronic and photonics applications at the nanoscale. In this study, few-layer and nanometer-sized VP with robust stability in different environments were successfully prepared using ultrasound-assisted liquid phase exfoliation. The ultrafast carrier dynamics and third-order nonlinear optical response of VP were investigated for the first time, showing its potential for ultrafast nonlinear photonic applications like saturable absorbers and optical switches.
Article
Chemistry, Multidisciplinary
Zhanzhao Fu, Mingliang Wu, Qiang Li, Chongyi Ling, Jinlan Wang
Summary: The performance of supported catalysts is influenced by metal-support interactions, and quantifying the structure-activity relationship remains a challenge. This work constructs a simple descriptor to describe the effect of metal-support interaction on the nitrogen reduction reaction (NRR) activity. The descriptor accurately predicts the limiting potential (U-L) for the NRR without density functional theory calculations. The study also demonstrates the applicability of the descriptor to other materials and successfully selects promising NRR catalysts.
MATERIALS HORIZONS
(2023)
Article
Electrochemistry
Yuan Liu, Xu Lian, Chonglai Jiang, Zejun Sun, Jinlin Yang, Yishui Ding, Wei Chen
Summary: To stabilize sodium metal anodes (SMAs), various strategies have been developed, including employing anode hosts and electrolyte additives to establish protective layers. In this study, the interaction mechanism between sodium metal and sulfur-containing functional groups was investigated using comparative model systems of alpha-sexithiophene (6T) and p-sexiphenyl (6P). The results showed that sodium atoms tend to interact with sulfur atoms and their connected carbon atoms as well as the aromatic carbon atoms of the end groups of 6T molecules, while no chemical interaction between Na and 6P molecules was observed. These findings shed light on the rational design of sulfur-containing protective materials and relevant interface engineering to stabilize SMAs.
Article
Engineering, Electrical & Electronic
Yafang Zeng, Xianghong Zhang, Yanxue Hao, Yi Zou, Bangyan Zeng, Qian Yang, Tailiang Guo, Huipeng Chen, Wei Chen
Summary: In this study, a neural device based on IGZO memristors fabricated by the solution method is proposed, which has simple process steps, no vacuum treatment process, rapid film formation, easy doping, and more suitability for low-temperature film deposition on a flexible substrate, as well as compatibility with a thin-film transistor (TFT). The solution-processed IGZO-based neurons show great potential for neuromorphic systems.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Chemistry, Physical
Yang Chen, Jiangang Feng, Yuqing Huang, Weijin Chen, Rui Su, Sanjib Ghosh, Yi Hou, Qihua Xiong, Cheng-Wei Qiu
Summary: This study demonstrates the realization of compact spin-valley-locked perovskite emitting metasurfaces with pure circular polarization, high directionality, and large emission angles by imparting spin-dependent geometric phases through Brillouin zone folding.
Article
Nanoscience & Nanotechnology
Shuai Zhang, Zhuoya Zhu, Wenna Du, Xianxin Wu, Sanjib Ghosh, Qing Zhang, Qihua Xiong, Xinfeng Liu
Summary: Exciton polariton condensation in an annular potential landscape can be controlled by an external field, resulting in rotational polariton flow with different orbit indexes. By using ring-shaped pumping in a planar perovskite microcavity, linear coupled counter-rotating polariton states and a vortex pairs-petal state have been demonstrated. The diameter of the pumping ring and the detuning energy can control the azimuthal indices and flowing velocity of the polaritons.
Article
Nanoscience & Nanotechnology
Meiying Leng, Jinqi Wu, Kevin Dini, Jing Liu, Zehua Hu, Jiang Tang, Timothy C. H. Liew, Handong Sun, Rui Su, Qihua Xiong
Summary: Lead halide perovskites have made significant progress in high-efficiency light-emitting diodes (LEDs) and are ideal for strong exciton-photon coupling. However, achieving exotic phenomena such as polariton lasing and polariton LEDs in perovskite electroluminescent microcavities at room temperature remains a challenge. In this study, we demonstrate room-temperature strong coupling in a perovskite LED structure, with the best device exhibiting a current efficiency of 4.5 cd/A and an external quantum efficiency of 1.4% with anticrossing behavior via optical pumping. Our approach offers a new strategy for exploring ultrafast LEDs and electrically pumped perovskite lasing.
Article
Physics, Applied
Mianzeng Zhong, Baocheng Cui, Zhangxun Mo, Yali Yu, Qinglin Xia, Fen Zhang, Ziqi Zhou, Le Huang, Bo Li, Juehan Yang, Jun He, Zhongming Wei
Summary: Controlling the band alignment of heterostructures is important for designing novel physical properties and functional devices. Van der Waals heterostructures have the advantage of overcoming lattice matching limitations, but achieving full control over band alignment is challenging. In this study, black-arsenic (b-As)/WSe2 van der Waals heterostructures with type-I band alignment were realized and the band alignment could be tuned by a gate electric field, resulting in improved photoresponsivity and ultra-fast photoresponse.
APPLIED PHYSICS REVIEWS
(2023)
Review
Materials Science, Multidisciplinary
Zhibin Zhang, Stiven Forti, Wanqing Meng, Sergio Pezzini, Zehua Hu, Camilla Coletti, Xinran Wang, Kaihui Liu
Summary: Two-dimensional (2D) materials have garnered extensive research attention due to their intriguing physical properties and potential applications in electronics and optoelectronics. This review provides an in-depth analysis of the growth and applications of 2D materials, focusing on single crystals. The review covers growth strategies for monolayer and multilayer single crystals, as well as their use in electronic and optoelectronic devices.
Article
Chemistry, Multidisciplinary
Yuzhong Chen, Ying Shi, Yusong Gan, Haiyun Liu, Tengfei Li, Sanjib Ghosh, Qihua Xiong
Summary: Exciton polaritons at room temperature exhibit ultrafast coherent dynamics with high propagation speed and longer coherence time than previously believed.
Article
Optics
Yuan Luo, Quanbing Guo, Xinyi Deng, Sanjib Ghosh, Qing Zhang, Hongxing Xu, Qihua Xiong
Summary: We demonstrate the manipulation and prolongation of nonlinear polaritons by creating fully deterministic potential wells with lithographic mesas to trap polaritons in a monolayer WS2 microcavity. By varying the trapping sizes, the interaction strength between polariton and exciton is enhanced by about six times through managing their spatial overlap. Moreover, the coherence of trapped polaritons is significantly improved due to the spectral narrowing and can be tailored within a picosecond range. Therefore, this work provides a convenient approach to manipulate the nonlinearity and coherence of polaritons, and opens up possibilities for exploring many-body phenomena and developing novel polaritonic devices based on 2D materials.
LIGHT-SCIENCE & APPLICATIONS
(2023)
