Article
Chemistry, Multidisciplinary
Zheng Bian, Jialei Miao, Tianjiao Zhang, Haohan Chen, Qinghai Zhu, Jian Chai, Feng Tian, Shaoxiong Wu, Yang Xu, Bin Yu, Yang Chai, Yuda Zhao
Summary: 2D materials with atomic thickness have strong gate controllability and hold promise for area-efficient electronic circuits. Modulating the carrier density/type in these materials is challenging, but a new method using hexagonal boron nitride as an interfacial layer has been developed to control the polarity of tungsten diselenide field-effect transistors. This approach allows for the creation of versatile logic gates and circuits, reducing the number of transistors needed for a half adder by 83.3% compared to traditional CMOS technology.
Article
Chemistry, Multidisciplinary
Lior Asor, Jing Liu, Shuting Xiang, Nir Tessler, Anatoly I. Frenkel, Uri Banin
Summary: Doped heavy metal-free III-V semiconductor nanocrystal quantum dots (QDs) have attracted great interest for both their fundamental doping characteristics and their applicability in p-n homojunction devices. In this study, p-type doping of InAs NCs was achieved through the use of Zn, allowing for control over the charge carrier type in InAs QDs field effect transistors. X-ray absorption spectroscopy analysis confirmed substitutional doping by Zn2+ replacing In3+. Surface passivation by Zn was also observed, leading to enhanced near infrared photoluminescence. This research paves the way for the fabrication of optoelectronic devices active in the short-wave infrared region using heavy-metal free nanocrystal building blocks.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Wenting Ji, Xiao-Lei Shi, Wei-Di Liu, Hualei Yuan, Kun Zheng, Biao Wan, Weixia Shen, Zhuangfei Zhang, Chao Fang, Qianqian Wang, Liangchao Chen, Yuewen Zhang, Xiaopeng Jia, Zhi-Gang Chen
Summary: In this study, a high ZT value of approximately 0.8 was achieved in n-type polycrystalline Bi2S3 through a combination of hierarchical structure manipulation and carrier density optimization. The unique micro/nanostructures formed during the fabrication process, along with the suppressed lattice thermal conductivity, contributed to this high ZT value. Additionally, CuCl2-doping was found to optimize carrier concentration and further enhance the thermoelectric performance of the material.
Article
Nanoscience & Nanotechnology
Yuyang Wu, Yi Zhang, Yunhao Zhao, Chenyuan Cai, Yahui Zhang, Yu Zhang, Chongyun Liang, Yingqiang Xu, Zhichuan Niu, Yi Shi, Renchao Che
Summary: Interfacial engineering is crucial in regulating the quality and property of heterogeneous structures, especially in nanometer-scaled devices. The growth-oriented characteristic of interfacial modulation strongly determines the main regions where modulation takes effect, with different effects observed in a semiconductor quantum well structure depending on whether arsenic atoms are modulated at the well-on-barrier or barrier-on-well interface. The impact of the growth-oriented characteristic is demonstrated by the improvements in luminescent intensity and suppression of the quantum-confined Stark effect achieved through different interface modulation methods.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Manufacturing
Anubhav Sarmah, Madeline A. Morales, Ashutosh Srivastava, Shegufta Upama, Ankush Nandi, Todd C. Henry, Micah J. Green, Aniruddh Vashisth
Summary: This study presents a novel method for curing carbon fiber reinforced composites using radio frequency fields and evaluates the impact of fiber heating on the fiber-matrix interface properties. The results show that radio frequency heating can rapidly cure composites without degrading the fiber-matrix interface.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Green & Sustainable Science & Technology
Li Ping Liao, Yan Qing Yao, Gang Wang, Cun Yun Xu, De Bei Liu, Guang Dong Zhou, Yuan Xin Zhong, Qun Liang Song
Summary: Hot carriers in hybrid perovskite have excellent properties, and the invention of internally photoemitted hot carrier (IPHC) solar cells may improve efficiency.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Multidisciplinary
Yuling Huang, Bin Zhang, Jingwei Li, Zizhen Zhou, Sikang Zheng, Nanhai Li, Guiwen Wang, De Zhang, Daliang Zhang, Guang Han, Guoyu Wang, Xiaodong Han, Xu Lu, Xiaoyuan Zhou
Summary: Conventional doping methods for thermoelectric materials are limited and may lead to deteriorated electrical performance. This study proposes an unconventional doping strategy that stabilizes cation vacancies to increase hole concentration, resulting in a significant improvement in the average power factor.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Xiaoyu Li, Wei Zhang
Summary: SiCf/C/TiAl matrix composite is a high temperature structural material with potential wide applications, capable of replacing traditional high temperature alloys in aerospace. The study found that different reaction products are formed under specific temperature and pressure conditions, with Ti5Si3 being the final product at certain parameters.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
Ying Zhang, Xiuhua Guo, Kexing Song, Shaolin Li, Jiang Feng, Kaiyue Duan, Junbiao Duan
Summary: Graphene reinforced copper matrix composites were prepared by in-situ synthesis, which improved the interfacial bonding and enhanced the comprehensive performance of the composites. TiCp was formed at the interface, accompanied by Cu-Ti metallic compound in the matrix. The sintering parameters were optimized to achieve good interfacial bonding and improve the strengthening efficiency of GNPs. The in-situ synthesized TiCp played a crucial role in strengthening the GNPs/Cu interface and preventing crack propagation, thereby improving the mechanical properties of the composites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Soojin Kim, Chulmin Kim, Young Hyun Hwang, Seungwon Lee, Minjung Choi, Byeong-Kwon Ju
Summary: Researchers introduced a stable and site-selective method for surface doping of tungsten diselenide devices, successfully inducing a carrier-type transition effect and recovering electrical properties. The recovered device showed no additional defects on the interface after exposure to low-vacuum conditions for 10 days.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
Xiayu Liu, Rong Ji, Min Yang, Wentao Chen, Huiwen Chen, Xiaoli Song, Junliang Liu, Ming Zhang, Lifeng Zhang
Summary: Rare earth element doping was employed to enhance the microwave absorption properties of Barium hexaferrite (BaM)/polyaniline (PANI) composite. The effects of rare earth elements on the microstructures and properties of BaM nanopowders and BaM/PANI composites were investigated. The use of rare earth elements alleviated the constraints of electric polarization in PANI, resulting in improved absorption efficiency, expanded absorption frequency range, and reduced thickness. The La-BaM/PANI composite showed a maximum reflection loss of approximately -63.6 dB at 7.76 GHz with an optimum thickness of 3.28 mm. The Nd-BaM/PANI composite exhibited an effective absorption range of 4.72 GHz, and the Ce-BaM/PANI composites demonstrated a relatively broad effective frequency range of approximately 3.88 GHz with a small thickness of 1.58 mm.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Pragnya Satapathy, Navyashree Vasudeva, James Oinam, Subbarao Krishna Prasad
Summary: It is demonstrated that dispersing CdSeS gradient quantum dots in a nematic liquid crystal and confining them in a polymer network leads to ordered linear assembly, enhancing the photoluminescence and introducing anisotropy in emission magnitude. The presence of a high frequency AC field and photoisomerizable azobenzene derivative further enables on-demand and light-driven modulation of photoluminescence.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Materials Science, Multidisciplinary
Yiran Wang, Yimin Gao, Yilei Fan
Summary: The decomposition of Ti3AlC2 ceramics can be suppressed and the properties of Ti3AlC2/Cu composites can be improved by modifying the surface of Ti3AlC2 with multi-arc ion plating Ti. The Ti coating inhibits the diffusion of Al atoms into the Cu matrix and reacts with Cu to generate CuxTi, effectively preventing decomposition and improving interfacial bonding strength.
Review
Materials Science, Multidisciplinary
Seong-Hwang Kim, Jong-Hoon Lee, Jong-Woo Kim, Seul-Yi Lee, Soo-Jin Park
Summary: Basalt fibers (BFs) have desirable characteristics, but their low intrinsic interfacial properties have limited the performance of BFs-reinforced polymeric composites (BFRPs). Understanding the effects of incorporating BFs is critical for improving the performance of BFRPs. This review summarizes recent research progress on the interfacial behavior in BFRPs and discusses strategies for enhancing the interfacial adhesion of BFs within the polymeric matrix.
ADVANCED FIBER MATERIALS
(2022)
Article
Engineering, Mechanical
Binbin Xu, Anran Wei, Jiayu Ye, Wenhao Sha, Fenglin Guo
Summary: The theoretical method presented in this work offers a solution for the creep behavior of composite materials at high temperatures by considering misfit deformation and stress redistribution caused by interface diffusion. The methodology can be conveniently applied to account for various factors such as plasticity and creep of matrix, interface debonding, and microcracks, paving the way for the study of the complex behavior of composite materials at high temperatures.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Chenggong Jiang, Hui Zhang, Peng Li, Xiaoyi Zhan, Zhenjie Liu, Liang Wang, Baohua Mao, Qingtian Li, Zhaoyin Wen, Zhangquan Peng, Shengli Chen, Zhi Liu
Summary: The all-solid-state Na-O-2/H2O battery can achieve high round trip efficiency and low overpotential at low humidity and moderate temperature, showing great potential for practical applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Christopher A. Colla, Ian Colliard, April M. Sawvel, May Nyman, Harris E. Mason, Gauthier J. -P. Deblonde
Summary: This study investigates the structure and chemistry of americium and curium using polyoxometalates (POMs) as chelating ligands. NMR measurements reveal the formation of stable complexes between POMs and the actinides in phosphate-containing solutions. The POM-NMR approach allows for the study of trace amounts of americium and curium, providing a new avenue for investigating heavy actinides and other radionuclides.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Chiyan Liu, Jian Liu, Yong Han, Zhangrui Wang, Hui Zhang, Xiaoming Xie, Bo Yang, Zhi Liu
Summary: The hydration process of a Nafion membrane was studied using ambient-pressure x-ray photoelectron spectroscopy (APXPS), which provided a quantitative analysis of water content and the transformation of sulfonic acid groups. The conductivity of the membrane was determined by electrochemical impedance spectroscopy, establishing a connection between the electrical properties and the microscopic mechanism. Ab initio molecular dynamics simulations provided core-level binding energies of O- and S-containing species in the Nafion + H2O system.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Jian Liu, Yong Han, Chiyan Liu, Bo Yang, Zhi Liu
Summary: Ambient-pressure X-ray photoelectron spectroscopy (APXPS) is an effective method for detecting chemical states in complex systems. Computational modeling at the molecular and electronic levels provides a fundamental understanding of the core-level shift (CLS) of water observed in liquid/gas phase via APXPS. The CLS value derived from experiments is reproduced by modeling, taking into account the total shift and photon energy dependence. The contributions of collective electrical effects to the CLS were analyzed and discussed, showing the dominance of electronic polarization in the surrounding molecules and the role of electrostatic potential in peak broadening.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Li-Wen Wu, Chiyan Liu, Yong Han, Yi Yu, Zhi Liu, Yi-Fan Huang
Summary: The decoupling of electron and proton transfer in heterogeneous (photo)electrochemical proton-coupled electron transfer water oxidation was elucidated through in situ microphotoelectrochemical surface-enhanced Raman spectroscopy (SERS) and ambient-pressure X-ray photoelectron spectroscopy analysis. The characteristic blue shift of the vibration of Au-OH species in laser-power-density-dependent measurements indicated the light-induced production of Au-OH+ in water oxidation. The frequency blue shift from the positively charged Au-OH species was confirmed by density functional theory calculations. The photocurrent-dependent frequency blue shift highlighted Au-OH+ as the key electron-transfer intermediate in water oxidation.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Editorial Material
Chemistry, Physical
Zhu-Jun Wang, Zhi Liu
Summary: The article discusses the application of advanced characterization technologies in the study of ancient man-made materials and human history.
Article
Chemistry, Physical
Jun Cai, Yunjian Ling, Hui Zhang, Bo Yang, Fan Yang, Zhi Liu
Summary: In this work, an in situ study of Rh-O species and their activity for CO oxidation over the Rh(110) surface was reported using advanced surface science techniques. It was found that Rh-O species, including (2 x 1)-O, (10 x 2)-O, trilayer O-Rh-O, and Rh2O3, were formed in sequence as the O-2 chemical potential increases. The reactivity of the Rh-O species followed the sequence (2 x 1)-O > (10 x 2)-O > trilayer O-Rh-O >> Rh2O3, with the titration reaction on the trilayer oxide being a two-step process.
Article
Chemistry, Physical
Weiyi Lin, Wenda Bao, Jun Cai, Xincan Cai, Haojie Zhao, Yue Zhang, Yingdong Deng, Shaoyu Yang, Zeyu Zhou, Zhi Liu, Jin Xie
Summary: Nickel-rich layered cathode materials, considered as promising for high energy lithium-ion batteries, are prone to surface impurity formation, which affects battery performance. Surface coating and doping methods can effectively inhibit impurity formation and improve battery electrochemical performance.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Li-Wen Wu, Chiyan Liu, Yong Han, Yi Yu, Zhi Liu, Yi-Fan Huang
Summary: In this study, we used in situ microphotoelectrochemical surface-enhanced Raman spectroscopy and ambient-pressure x-ray photoelectron spectroscopy to investigate the correlation between surface Au(III) (hydro-)oxides and the photocurrent of Au-mediated photoelectrochemical water oxidation. We found that an increase in surface Au(III) (hydro-)oxides led to a negative shift in onset potential, an increase in photocurrent, and less growth of surface (hydro-)oxides. These results suggest that surface Au(III) (hydro-)oxides kinetically promote water oxidation by restricting the growth of surface (hydro-)oxides.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Yijing Zang, Jun Cai, Yong Han, Huanyang Wu, Wen Zhu, Shucheng Shi, Hui Zhang, Yihua Ran, Fan Yang, Mao Ye, Bo Yang, Yimin Li, Zhi Liu
Summary: The structure sensitivity of CO2 activation on Ni(111) and Ni(110) surfaces under identical reaction conditions has been studied using ambient-pressure X-ray photoelectron spectroscopy (APXPS). The hydrogen-assisted activation of CO2 is the major reaction path on Ni(111) at room temperature, while the redox pathway of CO2 prevails on Ni(110). Both activation pathways are activated in parallel at higher temperatures. The low-coordinated sites on Ni(110) promote the activity and selectivity of CO2 hydrogenation to methane.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Nuclear Science & Technology
Yi-Jing Zang, Shu-Cheng Shi, Yong Han, Hui Zhang, Wei-Jia Wang, Peng Liu, Mao Ye, Zhi Liu
Summary: An in-depth understanding of the structure-activity relationship is necessary for the rational design of high-performance catalysts. This study presents a method for studying catalytic mechanisms using in situ reaction cells and surface science techniques. The proposed system consists of four parts: preparation chamber, temperature-programmed desorption chamber, quick load-lock chamber, and in situ reaction cell. The functionality of the system was demonstrated through experiments on a clean Cu(111) surface and Ni(110) surface.
NUCLEAR SCIENCE AND TECHNIQUES
(2023)
Article
Chemistry, Physical
Wenqian Han, Jing Ning, Ying Long, Junjie Qiu, Wenfeng Jiang, Yun Wang, Luqman Ali Shah, Dong Yang, Angang Dong, Tongtao Li
Summary: A multilevel structural control strategy is used to enhance the efficiency and durability of molybdenum disulfide as a catalyst for the hydrogen evolution reaction. By growing curved MoS2 nanosheets within a mesoporous graphitic framework, the resulting MoS2@C supertubes demonstrate exceptional high-current-density HER activity exceeding previously reported catalysts.
ADVANCED ENERGY MATERIALS
(2023)
Article
Instruments & Instrumentation
Zichen Gao, Jiadong Fan, Yajun Tong, Jianhua Zhang, Bo He, Yonggan Nie, Hui Luan, Donghao Lu, Difei Zhang, Xinye Yuan, Yueran Wang, Zhi Liu, Huaidong Jiang
Summary: The characterization of the focal spots of X-rays is crucial for diagnosing and optimizing the performance of focusing systems. This study proposes a method based on coherent diffraction imaging to characterize the spot size at the focus position. Numerical simulations and experimental validation were conducted to demonstrate the feasibility of the proposed method.
JOURNAL OF SYNCHROTRON RADIATION
(2023)
Article
Chemistry, Physical
Xingyuan Wang, Xuefeng Zhang, Yibo Sun, Hui Zhang, Cuiying Pei, Mohan Zhao, Jiayin Zhou, Qijuan Tang, Huiqi Chen, Bingxu Xi, Yanpeng Qi, Zhi Liu, Gang Li, Xiaofei Guan
Summary: In this study, high-valence cations (Zn2+ and Al3+) were used to reconstruct the electronic band structure of samarium nickelate (SmNiO3) and achieve reversible resistivity modulation. The resistivity of SmNiO3 showed a significant increase upon Zn2+ intercalation and electron doping under positive gate voltage, and decreased significantly when the Zn2+ ions were extracted under negative gate voltage. The resistivity modulation using Zn2+ was non-volatile, and electrochromic behavior was also observed. The feasibility of reversible resistivity modulation of SmNiO3 using high-valence cations under applied voltage was demonstrated.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Jing Ning, Jinxiang Zou, Ying Long, Xiaomeng Ren, Yangfei Cao, Tongtao Li, Angang Dong
Summary: In this study, a unique tubular superstructure composed of carbon-armored platinum nanocrystals was designed and used as an efficient electrocatalyst for the oxygen reduction reaction. The supertubes exhibited high catalytic activity and stability, making them a promising candidate for electrocatalytic applications.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)