Article
Chemistry, Physical
Kun Sun, Mingjun Sun, Cheng Chen, Sicheng Chen, Jinwei Fan, Dongfeng Diao
Summary: The structural evolution and low-friction behavior of silicon-doped amorphous carbon films are reported. Si atoms preferentially replaced certain carbon atoms in the lattice, forming bonds with other carbon atoms. The films exhibited hard surfaces and low friction behavior, with the low friction mechanism attributed to H-H interactions and π*-π* interactions.
Article
Materials Science, Ceramics
Chengjuan Wang, Yanxiang Wang, Haotian Jiang, Xiaodan Xu, Yang Yue, Bowen Cui, Mengfan Li, Zhenhao Xu
Summary: In this study, cupric ammonia was used as a catalyst precursor to grow carbon nanotubes (CNTs) onto carbon fiber (CF) through chemical vapor deposition, resulting in highly efficient and multifunctional electromagnetic wave (EMW) absorbers. The synthesized N/S co-doped CNTs/CF sample demonstrated excellent absorption performance with a minimal reflection loss of -59.28 dB at 14.1 GHz and an ultrathin thickness of 1.42 mm. The material also exhibited a broad effective absorption bandwidth (EAB) of 3.3 GHz (12.3-15.6 GHz) with 31% loading in the paraffin matrix. The excellent attenuation performance was attributed to the continuous three-dimensional conducting networks, abundant interfaces, sufficient defects, and well impedance matching.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Langning Wang, Linglong Zeng, Fuying Liu, Muyu Yi, Jinmei Yao, Tao Xun, Hanwu Yang, Juntao He
Summary: An axial-triggering vertical SiC photoconductive switch with Al-doped ZnO under the Ag electrode was developed for enhanced breakdown strength and photoconductivity. Two devices with AZO/SiC/Ag and AZO/SiC/AZO/Ag structures were prepared, and test results show that the new device has approximately 1.2 times higher conductivity, attributed to the diffuse reflection effects of the AZO/Ag mirror. The new device exhibits significantly enhanced breakdown strength and longer lifetime compared to the old device.
IEEE ELECTRON DEVICE LETTERS
(2023)
Article
Engineering, Environmental
Bingxin Shen, Ning Fu, Yuwen Chen, Wei Shao, Yurong Yan, Jia Huang, Zhenglong Yang
Summary: This study proposes a method to encapsulate low-cost micron-sized silicon suboxide (m-SiOx) into amorphous B, N co-doped carbon nanotube network (SSBCN) through metal cation-assisted carbonization. The encapsulation enables stable volume variation, efficient electron and Li-ion transfer, and fast electrolyte penetration. The SSBCN exhibits high reversible capacities, excellent rate performance, and long-term cycle stability, surpassing other SiOx-based anodes and presenting a new opportunity for m-SiOx in high-performance LIBs.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Electrochemistry
Lei Ding, Tianyue Huang, Dawei Zhang, Pan Qi, Lihao Zhang, Cong Lin, Hao Luo
Summary: This study proposes a simple and effective method to enhance the performance of Prussian blue analog-derived catalysts by altering the calcination conditions. The obtained Co3O4/Co@NC catalyst exhibits outstanding electrochemical performance, surpassing other single-component catalysts. Systematic investigations suggest that the enhanced performance is mainly attributed to the Co3O4/Co nanoheterostructure interface and the N-doped porous carbon matrix.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Yi-Fan Wang, Li Li, Ming Jiang, Xin Yang, Xu Yu, Li Xu
Summary: Boron and nitrogen co-doped silicon-carbon dots showed high selectivity in detecting dopamine, functioning as a fluorescent nanosensor and colorimetric probe. The interaction between BN-SiCDs and dopamine oligomers through hydrogen bonds and pi-pi conjugation led to fluorescence enhancement and color change. Additionally, quantitative detection was achieved with the assistance of a smartphone app.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
A. F. Qasrawi, Maryam Khalefa N. Abuarra
Summary: In this study, copper dopants were introduced into amorphous InSe thin films using thermal evaporation under vacuum conditions. The effects of different copper doping concentrations on the structural, compositional, electrical, and photoelectrical properties of the films were investigated. It was found that copper doping did not significantly change the morphology of the films, but improved the atomic stoichiometry. Furthermore, copper doping affected the conductivity and photoconductivity of the films.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Inorganic & Nuclear
Cuifeng Wang, Zhaohui Wu, Guihao Liu, Sha Bai, Lin Guo, Lei He, Yu-Fei Song
Summary: In this study, an effective In2O3-CeOx heterostructure catalyst was synthesized for the electrochemical reduction of CO2 to formic acid with high catalytic activity, achieving a maximum faradaic efficiency of 94.8%.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Physical
Sungtae Kim, Ung-gi Kim, Jinseok Ryu, Dokyun Kim, Miyoung Kim, Young-Chang Joo, So-Yeon Lee
Summary: Boron-doped amorphous carbon (a-C) films were deposited using DC magnetron sputtering with varying boron concentrations for semiconductor integration. An increase in boron doping concentration resulted in higher etch resistance but also a gradation of etch resistivity in the depth direction of the film. The study demonstrated the potential of boron-doped a-C films as a hardmask material for the semiconductor industry.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Ceramics
B. J. Western, M. S. Harcrow, V. C. Lopes, A. J. Syllaios, U. Philipose, C. L. Littler, Sean Andrews, Tallis Chang, John Hong
Summary: Temperature dependent conductivity measurements on phosphine doped hydrogenated amorphous silicon revealed anomalous hopping conduction, with ln sigma proportional to T-p with p approximate to 0.75. Argon dilution affects dopant incorporation and defect formation, leading to anomalous conduction observed in this study. Raman spectroscopy provided additional evidence of structural changes in the silicon network.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Chemistry, Applied
Wenxiu Yang, Weiyu Zhang, Rui Liu, Fan Lv, Yuguang Chao, Zichen Wang, Shaojun Guo
Summary: This study reports the synthesis of amorphous metal clusters supported on metal-doped carbon nanocages as efficient electrocatalysts for hydrogen evolution reaction (HER) in basic media. The as-made catalyst exhibits superior HER performance with low onset overpotential, low Tafel slope, and high stability.
CHINESE JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Nimrod Harpak, Guy Davidi, Eran Granot, Fernando Patolsky
Summary: This method proposes a novel approach for synthesizing extremely uniform and diversely doped silicon nanotube heterostructures through a simple two-step process using a Ge nanowire sacrificial core. The precise dopant patterning allows for the extension of Si nanotube applications.
Article
Chemistry, Physical
Jun-Sik Cho, Yeong Hun Seo, Ahreum Lee, Sungeun Park, Kihwan Kim, Ara Cho, Seungkyu Ahn, Jinsu Yoo, Joo Hyung Park
Summary: Transparent photovoltaic tandem devices with controlled absorber thickness exhibited high power conversion efficiencies and improved performance under bifacial illumination. These devices maintained excellent PV performance even at low-light intensities.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Ethan A. Scott, Sean W. King, Nanette N. Jarenwattananon, William A. Lanford, Han Li, James Rhodes, Patrick E. Hopkins
Summary: The thermal conductivity of amorphous solids can be increased through ion irradiation, altering the bonding network configuration. Films with higher initial hydrogen content show the greatest enhancement, accompanied by stiffening and densification from the irradiation process. This enhancement in vibrational transport is unique compared to the structural degradation and reduced thermal conductivity typically seen in ion conductivities of crystalline materials.
Article
Chemistry, Multidisciplinary
Yuchen Zheng, Liang Cheng, Jiangbin Su, Chuncai Chen, Xianfang Zhu, Hang Li
Summary: This study demonstrates the nanowelding of two crossing amorphous SiOx nanowires induced by uniform electron beam irradiation at room temperature. It is observed that the nanowires become unstable under the electron beam irradiation due to nanocurvature, leading to athermal migration of surface atoms and gradual welding of the nanowires. A proposed mechanism of athermal atomic diffusion driven by nanocurvature and athermal activation of the electron beam is simulated and reveals the detailed process of nanowelding.
Article
Optics
Yunyun Liu, Fei Pan, Xihu Wang, Ju Gao
Summary: By introducing Tm3+ into the Er3+/Tm3+:CLGO crystal, enhanced mid-infrared emissions can be achieved while reducing near-infrared emissions; the introduction of Tm3+ also helps to decrease the fluorescence lifetime of Er3+, addressing the self-saturation issue.
LASER PHYSICS LETTERS
(2021)
Article
Optics
Yunyun Liu, Fei Pan, Chaoyang Tu, Ju Gao
Summary: A high optical quality Dy3+-doped CaLaGa3O7 crystal, grown by the Czochralski technique along the (0 0 1) orientation, exhibits strong yellow emission at 574 nm, which can be pumped directly by the rapidly developed blue GaN LD. The crystal's electronic structures were calculated using first-principles calculations based on density functional theory, leading to the discovery of the yellow emission and potential as a candidate for a yellow laser.
JOURNAL OF LUMINESCENCE
(2021)
Article
Nanoscience & Nanotechnology
Ming Zheng, Pengfei Guan, Yaping Qi, Zhenhua Tang, Hao Ni, Ju Gao
Summary: The research found that in La0.85Hf0.15MnO3/Pb(Mg1/3Nb2/3)O-3-PbTiO3 multiferroic heterostructures, charge ordering and electronic transport can be manipulated by piezo-strain and magnetic field through phase separation. Electrically induced lateral compressive piezo-strain can decrease film resistance, while magnetic field can reduce piezo-resistance effect.
ADVANCED ELECTRONIC MATERIALS
(2021)
Article
Physics, Applied
Ju Li, Xiaowei Zhou, Yucheng Jiang, Run Zhao, Ju Gao, Jie Xing, Guozhen Liu, Jie Qiu
Summary: The paper discusses the development and photoelectrical properties of a p-n heterojunction composed of WSe2 and 2DEG, showing good rectifying behavior, low leakage current, and greatly enhanced visible-light photoresponse compared to oxide 2DEG, offering potential applications in nanoscale electronics and optoelectronics.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Huang Chuan-Xin, Ding Xing-Wei, Liu Yun-Yun, Liang Lan-Ju, Gao Ju
Summary: This study investigates the effect of O-2 content on the properties of InGaZnO thin films and explores the relationship between bias stress stability and density of states (DOS) of IGZO TFTs. The results suggest that devices with a smaller DOS are more stable.
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
(2022)
Article
Physics, Multidisciplinary
Yucheng Jiang, Anpeng He, Run Zhao, Yu Chen, Guozhen Liu, Hao Lu, Jinlei Zhang, Qing Zhang, Zhuo Wang, Chen Zhao, Mingshen Long, Weida Hu, Lin Wang, Yaping Qi, Ju Gao, Quanying Wu, Xiaotian Ge, Jiqiang Ning, Andrew T. S. Wee, Cheng-Wei Qiu
Summary: The study demonstrates a novel vdW p-n junction structure capable of storing and releasing photo-generated carriers in a device, resulting in a chargeable photoconductivity phenomenon that is completely different from traditional photoconductivity.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Analytical
Jie Wei, Meng Zhao, Cong Wang, Jun Wang, Jian-Min Ye, Yu-Chen Wei, Zhe-Yi Li, Run Zhao, Guo-Zhen Liu, Yan-Hong Geng, Rui Wang, Hui-Dong Xiao, Ying Li, Chao-Ya Li, Zhi-Qiang Gao, Ju Gao
Summary: Gas sensing performance characterization systems are crucial for the research and development of gas sensing materials and devices. This study presents a high-precision gas sensing material characterization system based on vacuum technology, which enables precise and simultaneous measurement of electrical responses. The system significantly improves gas concentration control accuracy and pressure control accuracy, and allows for sensitivity, selectivity, and stability tests. It also compares and proposes different optical signal measurement set-ups based on their performance in detection range, linearity, noise, and response time.
Article
Chemistry, Analytical
Heng Liu, Meng Zhao, Yongkang Gong, Kang Li, Cong Wang, Yuchen Wei, Jun Wang, Guozhen Liu, Jinlei Yao, Ying Li, Zheyi Li, Zhiqiang Gao, Ju Gao
Summary: In this study, a multifunctional high-vacuum system was developed to measure the electro-optical conversion efficiency of metamaterial-based thermal emitters. The system has the capability to detect various parameters, allowing real-time monitoring of sample changes, failure mechanism analysis, and fatigue and high-low temperature impact tests.
Article
Chemistry, Physical
Mengde Zhu, Siqi Li, Hongfang Zhang, Ju Gao, K. W. Kwok, Yanmin Jia, Ling-Bing Kong, Wenying Zhou, Biaolin Peng
Summary: The micron-sized Ba(ZrxTi1_x)O-3 particles exhibit good piezocatalytic performance and multifunctionality for degrading organic pollutants. The increase in piezoelectric properties is correlated with the degree of diffuseness gamma, and the presence of polar nanodomain regions significantly boosts catalytic activity.
Article
Nanoscience & Nanotechnology
Haiyun Yao, Zhaoqing Sun, Xin Yan, Maosheng Yang, Lanju Liang, Guohong Ma, Ju Gao, Tenten Li, Xiaoxian Song, Haiting Zhang, Qili Yang, Xiaofei Hu, Ziqun Wang, Zhenhua Li, Jianquan Yao
Summary: This article introduces a biosensor based on terahertz metasurfaces, consisting of a metasurface and a metal oxide semiconductor-like structure, which enables ultra-sensitive multidimensional detection. By varying the photoconductivity of the semiconductor-like structure, the biosensor can detect whey protein concentrations as low as 6.25 ng/mL, and significant variations in frequency, phase, and transmission amplitude were observed for different protein concentrations. Reversible biosensing in the terahertz region was also achieved by applying lasers with different wavelengths.
Article
Optics
Xin Yan, Tengteng Li, Guohong Ma, Ju Gao, Tongling Wang, Haiyun Yao, Maosheng Yang, Lanju Liang, Jing Li, Jie Li, Dequan Wei, Meng Wang, Yunxia Ye, Xiaoxian Song, Haiting Zhang, Chao Ma, Yunpeng Ren, Xudong Ren, Jianquan Yao
Summary: This study proposes an ultra-sensitive biosensor based on Dirac points, using patterned graphene and perovskites. The sensor can qualitatively detect sericin with a lower limit of detection than existing sensors. This suggests that the Dirac-point-based biosensor is a promising platform for ultra-sensitive and qualitative detection.
PHOTONICS RESEARCH
(2022)
Article
Nanoscience & Nanotechnology
Shuainan Gong, Zhichao Wang, Li Ye, Run Zhao, Guozhen Liu, Jinlei Zhang, Yang Li, Zhenping Wu, Lin Wang, Jun Wang, Chunlan Ma, Yucheng Jiang, Ju Gao
Summary: This study focuses on the preparation of Te nanowires and nanosheets through a solution method, as well as their construction of van der Waals heterojunctions with 2DEG on STO substrate. The heterojunctions exhibit promising rectifying behavior, showing potential applications as diodes in high-performance electronic devices.
ACS APPLIED NANO MATERIALS
(2021)
Article
Optics
Yunyun Liu, Fei Pan, Ju Gao, Chaoyang Tu
Summary: A new disordered crystal of Nd3+-doped CaLaGa3O7 (Nd: CLGO) was successfully grown and characterized. The crystal exhibited excellent laser processing efficiency and pumping efficiency, making it suitable for generating ultrashort pulse lasers.
JOURNAL OF LUMINESCENCE
(2022)
Article
Multidisciplinary Sciences
Run Zhao, Chao Yang, Hongguang Wang, Kai Jiang, Hua Wu, Shipeng Shen, Le Wang, Young Sun, Kuijuan Jin, Ju Gao, Li Chen, Haiyan Wang, Judith L. MacManus-Driscoll, Peter A. van Aken, Jiawang Hong, Weiwei Li, Hao Yang
Summary: In this study, the authors demonstrate an emergent multiferroism with magnetodielectric coupling in EuTiO3 created by a negative pressure control of strong spin-phonon coupling.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Songcheng Hu, Zhenhua Tang, Li Zhang, Dijie Yao, Zhigang Liu, Siming Zeng, Xiaobin Guo, Yanping Jiang, Xin-Gui Tang, Lin Ma, Zhaogang Nie, Ju Gao
Summary: This study prepared double perovskite oxide Bi2FeCrO6 (BFCO) thin films using the sol-gel method and investigated their structural, optical, and electrical properties. It was found that light could induce optical modulation conversion of RS behavior and a negative differential resistance (NDR) effect in Au/BFCO/FTO devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
