Article
Materials Science, Multidisciplinary
Krishna Yaddanapudi, Sabyasachi Saha, Kuttanellore Muraleedharan, Dipankar Banerjee
Summary: This study demonstrates the influence of metalorganic chemical vapor deposition process parameters on the evolution of gallium nitride (GaN) and focuses on nitrogen-polar GaN (N-polar GaN). The research shows that N-polar GaN epilayers formed at low epilayer growth temperatures have high surface quality and good crystalline quality.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Yangfeng Li, Xiaotao Hu, Yimeng Song, Zhaole Su, Haiqiang Jia, Wenxin Wang, Yang Jiang, Hong Chen
Summary: This study investigates the influence of temperature on nitridation and AlN buffer layer growth of N-polar GaN grown on sapphire substrate. It is found that medium temperature (1000 ?) leads to improved crystalline quality and optical performance, while high temperature (1110 ?) results in stronger yellow luminescence and weaker near-band-edge emission.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Chemistry, Physical
Sonachand Adhikari, Olivier Lee Cheong Lem, Felipe Kremer, Kaushal Vora, Frank Brink, Mykhaylo Lysevych, Hark Hoe Tan, Chennupati Jagadish
Summary: The growth of nonpolar m-plane AlGaN on GaN nanowires is limited by the shadowing effect. It is difficult to achieve metal-polar AlGaN nanowires through selective area growth in MOCVD. Nonpolar m-plane GaN nanowires obtained via selective area growth provide an excellent platform for the growth of nonpolar AlGaN MQWs.
Article
Materials Science, Multidisciplinary
Wenlong Li, Lianshan Wang, Ruohao Chai, Ling Wen, Haixia Lu, Huanhua Wang, Shaoyan Yang, Wenhong Sun
Summary: Additional high-temperature nitridation can improve the crystalline quality of semipolar (1122) GaN epitaxial films, reducing surface roughness and anisotropy.
CURRENT APPLIED PHYSICS
(2022)
Article
Physics, Applied
Kazimieras Badokas, Arunas Kadys, Juras Mickevicius, Ilja Ignatjev, Martynas Skapas, Sandra Stanionyte, Edvinas Radiunas, Giedrius Juska, Tadas Malinauskas
Summary: This study presents the growth of a GaN epilayer using remote epitaxy via graphene on a GaN/sapphire template and discusses the advantages of using monolayer graphene. The research focuses on analyzing GaN seed formation on the graphene interface and optimizing growth parameters to enhance the crystalline quality of the epilayer.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Optics
Linxuan Li, Siqi Zhu, Lu Cheng, Hongsheng Qi, Yu Fan, Wei Zheng
Summary: Raman and infrared reflectance spectroscopy were used to study GaN single crystals with different doping types and carrier concentrations. The characteristic spectra related to the carrier concentration were observed and fitted to obtain the accurate carrier concentration of the GaN crystals, which agreed well with the results from Hall measurement.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Physical
Aadil Waseem, Muhammad Ali Johar, Mostafa Afifi Hassan, Indrajit Bagal, Ameer Abdullah, Jun-Seok Ha, June Key Lee, Sang-Wan Ryu
Summary: The proposed flexible piezoelectric pressure sensor (PEPS) utilizes p-n junction coaxial GaN nanowires to achieve self-power generation, high power density, energy storage, and stable voltage response to both dynamic and static pressure signals.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Hoe-Min Kwak, Jongil Kim, Je-Sung Lee, Jeongwoon Kim, Jaeyoung Baik, Soo-Young Choi, Sunwoo Shin, Jin-Soo Kim, Seung-Hyun Mun, Kyung-Pil Kim, Sang Ho Oh, Dong-Seon Lee
Summary: This study presents an approach for growing and exfoliating GaN on 2D material/GaN templates. The key is to protect the integrity of the 2D material in high-temperature growth conditions. With effective protection, GaN can endure high temperatures and still be exfoliated.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Ceramics
Kai Chen, Yachao Zhang, Jincheng Zhang, Xing Wang, Yixin Yao, Jinbang Ma, Yue Hao
Summary: By analyzing the growth modes of GaN films on AlN buffer layers with different thicknesses, a new growth model of GaN on AlN buffer was proposed in this study. Under optimal conditions, AlGaN/GaN/AlN heterostructures showed excellent performance.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Danni Chen, Jing Ning, Dong Wang, Boyu Wang, Jianglin Zhao, Jincheng Zhang, Yue Hao
Summary: GaN on graphene/Al2O3 substrates compensates for the defects caused by MOCVD on mismatched substrates. An intermediate layer of AlN or ZnO nanowalls is needed to provide sufficient nucleation sites on graphene without dangling bonds. High-quality GaN crystals with low compressive stress and dislocation density were successfully synthesized on nitrogen-doped graphene by MOCVD. The improved adsorption energy of Ga atom on nitrogen-doped graphene and atomic nitrogen pretreatment on monolayer graphene contribute to the nucleation of GaN films.
SCIENCE CHINA-MATERIALS
(2023)
Article
Chemistry, Physical
Yuan Ren, Zhiyuan He, Bin Dong, Changan Wang, Zhaohui Zeng, Qixin Li, Zhitao Chen, Liuan Li, Ningyang Liu
Summary: This study focuses on the electrical properties of Ni/n-GaN Schottky barrier diodes fabricated on GaN bulk substrates with different crystal orientations. The results show that the crystal orientation of the GaN substrate has a significant impact on the Schottky barrier height, reverse leakage current, and barrier inhomogeneity of the devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
Liyuan Peng, Shuangtao Liu, Jing Yang, Degang Zhao, Feng Liang, Ping Chen, Zongshun Liu
Summary: Residual GaN has been found to have a significant impact on two-step-grown GaN on sapphire substrates. A novel growth method involving TMGa and NH3 in the high-temperature surface treatment process has successfully improved the quality and stability of GaN epitaxial films on sapphire.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Chemistry, Physical
G. Garcia-Salgado, J. J. Cruz-Bueno, F. S. Ramirez-Gonzalez, E. Gastellou, F. G. Nieto-Caballero, E. Rosendo-Andres, J. A. Luna-Lopez, A. Coyopol-Solis, R. Romano-Trujillo, C. Morales-Ruiz, R. Galeazzi-Isasmendi, V Lopez-Gayou, F. Severiano
Summary: The use of gallium arsenide (GaAs) films to obtain gallium nitride (GaN) on a quartz substrate is reported, with experiments suggesting that nitridation at 900 degrees C is suitable for GaN obtention. The nitridation time was found to determine the morphology of GaN, with XRD and EDS characterizations revealing different structures based on different nitridation times. A GaN film with a wurtzite structure was obtained after 30 minutes of nitridation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Baodan Liu, Qingyun Liu, Wenjin Yang, Jing Li, Xinglai Zhang, Shavkat Yuldashev, Jinlei Yao
Summary: This study synthesized nonpolar GaN nanowires through a chemical vapor deposition method and found that they exhibited strong UV luminescence, unlike the polar GaN nanowires. The unique luminescence property of nonpolar GaN nanowires provides advantages and opportunities for the development of high-performance optoelectronic nanodevices.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Zhiliang Jin, Youlin Wu
Summary: Graphdiyne (GDY), a new two-dimensional carbon hybrid material, has gained significant attention due to its unique properties in photocatalytic activity. In this study, researchers successfully developed a new method for the low-cost and high-yield production of GDY. Experimental results demonstrated that this one-pot conjugation method offers simplicity and obvious universality.
Article
Computer Science, Information Systems
Xiangyang Li, Shuqiang Jiang
IEEE TRANSACTIONS ON MULTIMEDIA
(2019)
Article
Engineering, Chemical
Zhen Liu, Xiangyang Li, Zai-Sha Mao, Shaojun Yuan, Chao Yang
CHEMICAL ENGINEERING SCIENCE
(2020)
Article
Engineering, Chemical
Yiting Xiao, Xiangyang Li, Shilong Ren, Zai-Sha Mao, Chao Yang
CHEMICAL ENGINEERING SCIENCE
(2020)
Article
Chemistry, Physical
Jianjun Ding, Xuxu Sun, Qi Wang, Dong-sheng Li, Xiangyang Li, Xiaoxiao Li, Lin Chen, Xian Zhang, Xingyou Tian, Kostya (Ken) Ostrikov
Summary: The study successfully synthesized Pt/g-C3N4 composite photocatalysts using low-temperature plasma technology, significantly improving the catalytic performance for hydrogen production. The research demonstrates great potential for enhancing photocatalytic performance with low-temperature plasma treatment.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Zhirong Zhang, Chen Feng, Xiangyang Li, Chunxiao Liu, Dongdi Wang, Rui Si, Jinlong Yang, Shiming Zhou, Jie Zeng
Summary: A single-atom iron catalyst with in-situ generated Fe4+ centers has been shown to have high activity towards the Oxygen Evolution Reaction (OER), requiring a low overpotential and exhibiting comparable performance to transitional-metal based catalysts. The strong interaction between atomic Fe and carbon support via C-O-Fe bonding was found to be the key factor in lowering the energy barrier for the rate-limiting step of *OOH formation during OER.
Article
Optics
Qiang Guo, Fuchun Chen, Xiangyang Li, Boyang Chen, Xin Wang, Guilin Chen, Caiying Wei
Summary: Radiometric calibration (RC) is essential for ensuring the accuracy of measurements from infrared photonic sensors. An original source-independent RC (SIRC) principle based on modeling has been proposed to improve calibration accuracy and reduce uncertainty costs, providing a traceable way for calibration. The SIRC has been implemented in Fengyun-2 satellites since 2019, ensuring long-term stable service for global observation systems.
LIGHT-SCIENCE & APPLICATIONS
(2021)
Article
Computer Science, Artificial Intelligence
Shuqiang Jiang, Yaohui Zhu, Chenlong Liu, Xinhang Song, Xiangyang Li, Weiqing Min
Summary: The study aims to investigate the issue of knowledge transferability affected by dataset bias in few-shot image recognition, and further analyze the performance differences on different datasets and few-shot learning methods. It concludes that relevant data and dense instances or diverse categories can better support transfer learning. Moreover, by evaluating the characteristics of dataset structures and performance of different learning methods, valuable observations are provided for future research in few-shot learning.
IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE
(2023)
Article
Optics
Huo Qin, Zhang Cheng, Jiao Cui-Ling, Wang Reng, Mao Cheng-Ming, Lu Ye, Qiao Hui, Li Xiang-Yang
Summary: The effect of different polarity (111) plane of CdZnTe substrates on the liquid phase epitaxy growth of Hg1-xCdxTe was investigated. The results show that the composition and thickness of HgCdTe films grown on (111)A surface CdZnTe substrates were equivalent to those on conventional (111)B surface CdZnTe substrates. The contact angles between HgCdTe melt and (111)A surface and (111)B surface of HgCdTe films grown on CdZnTe substrates were 50 +/- 2 degrees and 30 +/- 2 degrees, respectively.
JOURNAL OF INFRARED AND MILLIMETER WAVES
(2023)
Article
Optics
Qiao Hui, Wang Ni-Li, Lan Tian-Yi, Zhao Shui-Ping, Tian Qi-Zhi, Lu Ye, Wang Reng, Huo Qin, Shi Fan, Tang Yi-Dan, Chu Kai-Hui, Jia Jia, Zhou Qing, Sun Xiao-Yu, Jiang Pei-Lu, Luo Yi, Cheng Xin-Yi, Li Xiang-Yang
Summary: This article summarizes the failure modes of HgCdTe linear photoconductive detectors that have been used in several programs. The mechanisms behind these failure modes have been analyzed based on the combination of HgCdTe material parameters, device structure dimensions, detector physics, fabrication processes, and device test techniques. Criteria for failure modes have been proposed for a better understanding of HgCdTe linear photoconductive detectors and optimization of the screening process. These findings are also helpful for analyzing and resolving problems encountered in the application of HgCdTe linear photoconductive detectors.
JOURNAL OF INFRARED AND MILLIMETER WAVES
(2022)
Article
Optics
Sang Mao-Sheng, Xu Guo-Qing, Qiao Hui, Li Xiang-Yang
Summary: A high-speed room-temperature mid-wave infrared HgCdTe photodetector based on graded bandgap structure was developed, achieving a fast response time through the use of n-on-p homojunction structure. Analysis showed that the compositional grading in the absorber layer formed an electric field, thus altering the carrier transport mechanism.
JOURNAL OF INFRARED AND MILLIMETER WAVES
(2022)
Article
Optics
Shun-Zhe Yu, Ya-Cong Zhang, Yu-Ze Niu, Ye Zhou, Yi Zhou, Ding Ma, Wen-Gao Lu, Zhong-Jian Chen, Xiang -Yang Li
Summary: This paper proposes a low-power digital readout integrated circuit (DROIC) for mid-wave infrared imagers. The circuit features a 15-bit pixel-level single-slope analog-to-digital converter (ADC) and a novel power-self-adaptation pulse comparator to reduce power consumption. Experimental results demonstrate the circuit's good performance and low power consumption.
JOURNAL OF INFRARED AND MILLIMETER WAVES
(2022)
Article
Optics
Sheng Binbin, Wang Ling, Xu Jintong, Li Xiangyang
Summary: This study investigated the optical properties of multilayer AIGaN films with high Al content, fitting transmission spectra and establishing an absorption coefficient model. The effects of surface roughness on the transmission spectra were characterized using root mean square (RMS) parameters, and the fitting results were in good agreement with experimental results. Experimental data on the absorption coefficient of Al0.63Ga0.33N material in the all-band range were provided for the study of solar-blind UV detectors' response spectra, along with obtaining parameters of film thickness, refractive index, and surface roughness of the N materials.
ACTA OPTICA SINICA
(2021)
Article
Optics
Wang Reng, Jiao Cui-Ling, Lu Ye, Huo Qin, Qiao Hui, Li Xiang-Yang
JOURNAL OF INFRARED AND MILLIMETER WAVES
(2020)
Proceedings Paper
Computer Science, Artificial Intelligence
Xiangyang Li, Shuqiang Jiang, Jungong Han
THIRTY-THIRD AAAI CONFERENCE ON ARTIFICIAL INTELLIGENCE / THIRTY-FIRST INNOVATIVE APPLICATIONS OF ARTIFICIAL INTELLIGENCE CONFERENCE / NINTH AAAI SYMPOSIUM ON EDUCATIONAL ADVANCES IN ARTIFICIAL INTELLIGENCE
(2019)
Article
Optics
Wang Reng, Lu Ye, Jiao Cui-Ling, Qiao Hui, Li Xiang-Yang
JOURNAL OF INFRARED AND MILLIMETER WAVES
(2019)
Article
Chemistry, Physical
Qi-Wen Chen, Ze-Qing Guo, Jian-Ping Zhou
Summary: Multifunctional continuous solid solutions NFMTO-x were successfully synthesized via a one-step hydrothermal method by controlling the ratio of Mg and Fe. The NFMTO-x materials exhibited enhanced visible light response, effective adsorption and photocatalytic degradation of organic pollutants, CO2 methanation capability, and easy recyclability due to their magnetic properties. This research provides a significant multifunctional material for water purification.
APPLIED SURFACE SCIENCE
(2024)
Review
Chemistry, Physical
George E. Stan, Maziar Montazerian, Adam Shearer, Bryan W. Stuart, Francesco Baino, John C. Mauro, Jose M. F. Ferreira
Summary: Bioactive glasses have the ability to form strong bonds with tissues and release therapeutic ions. However, their biomechanical compatibility limits their use in load-bearing applications. The use of magnetron sputtering technology to fabricate BG coatings shows promise in improving their efficacy and potential for application.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zhaoxuan Wang, Zhicheng Yan, Zhigang Qi, Yu Feng, Qi Chen, Ziqi Song, Meng Huang, Peng Jia, Ki Buem Kim, Weimin Wang
Summary: The corrosion behavior of Fe-60 and Fe-83 ribbons in 0.6 M NaCl was studied. Fe-60 exhibited a local corrosion mode and formed a stable passivation film with higher corrosion resistance, while Fe-83 showed a combination of local and global corrosion modes and had lower corrosion resistance. Controlling the precipitation of nanocrystalline phases and increasing the POx content in the passivation film significantly improved the corrosion resistance of Fe-based glassy alloys.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hao-Kai Peng, Sheng-Yen Zheng, Wei-Ning Kao, Ting-Chieh Lai, Kai-Sheun Lee, Yung- Hsien Wu
Summary: This study investigates the effects of high energy/fluence proton radiation on the performance of HfZrOx-based FeFETs memory with different Zr content. The results show that the characteristics of FeFETs are influenced by proton radiation, and the extent of the influence depends on the Zr content. FeFETs with 50% Zr content exhibit minimal changes in memory window and demonstrate good endurance and retention performance.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zongyi Yue, Guangyi Wang, Zengguang Huang, Sihua Zhong
Summary: In this study, AZO and ITO films were successfully tuned as excellent passivation layers for c-Si surfaces, achieving effective minority carrier lifetime and outstanding optical properties through the optimization of annealing temperature and interfacial silicon oxide.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Martin Hruska, Jan Kejzlar, Jaroslav Otta, Premysl Fitl, Michal Novotny, Jakub Cizek, Oksana Melikhova, Matej Micusik, Peter Machata, Martin Vrnata
Summary: This paper presents a detailed study on the hydrogen sensing capabilities of highly nanoporous black gold films. The films exhibit fast response and recovery times at low temperatures. Different levels of nanoporosity were prepared and tested to investigate the sensing properties, and it was found that nanoporous black gold is suitable for hydrogen sensing. The sensitivity of the film depends on its nanoporosity.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yupu Wang, Gaofeng Teng, Chun To Yiu, Junyi Zhu
Summary: In the study of BM-SCO and HSCO thin films, it was found that H vacancies tend to prefer sites near the external surface or oxygen vacancy channels (OVCs), while H interstitials prefer sites of oxygen on a layer that contains six-fold coordinated Co. These findings not only enrich the understanding of complex surface phenomena of defect formation but also provide an explanation for the reversibility during phase transformation.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jiafeng Lu, Linping Teng, Qinxiao Zhai, Chunhua Wang, Matthieu Lancry, Ye Dai, Xianglong Zeng
Summary: In this study, we achieved full control of fiber nanograting orientation by manipulating laser polarization, and tailored space variant fiber nanogratings, which expanded the diversity in fiber nanograting engineering.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yibo Liu, Yujie Tao, Yue Liu, Qi Sun, Qinrong Lin, Kexin Kang, Qinghua Zhang, Qingjie Sun
Summary: This study investigates the wettability of the Ti-Cu-Fe multi-metal system, specifically the wetting behaviors of CuSi3 droplets on TC4 and 304SS plates. The results show that the CO2 + Ar gas atmosphere significantly affects interfacial mass transfer, thus influencing the wettability of the systems.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jimei Liu, Fei Wang, Rong Guo, Yuqi Liu, Mengyu Zhang, Jaka Sunarso, Dong Liu
Summary: This study developed Co/MXene composites with anti-corrosion properties by varying the cobalt content. These composites exhibited remarkable electromagnetic absorption performance and high resistance to corrosion under various corrosive conditions. The study also revealed the mechanism of electron transfer from cobalt to MXene and the electromagnetic dissipation behavior originated from polarization loss alone.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Moujie Huang, Yongsong Ma, Jingbo Yang, Lingyun Xu, Hangqi Yang, Miao Wang, Xin Ma, Xin Xia, Junhao Yang, Deli Wang, Chuang Peng
Summary: Strong metal-support interactions (SMSIs) are important for enhancing catalytic activities and stability in thermal catalysis. This study demonstrates a method to create SMSIs in electrocatalysis using carbon nanotubes and Ru nanoparticles, resulting in excellent catalytic activity and stability.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Ravi Trivedi, Brinti Mondal, Nandini Garg, Brahmananda Chakraborty
Summary: This study explores the potential of biphenylene as a nanocarrier for the delivery of the anticancer drug cisplatin. It is found that biphenylene offers physical stability, rapid release rate, solubility, and bio-compatibilities compared to other nanocarriers. The adsorption of cisplatin on the surface of biphenylene involves charge transfer from cisplatin to biphenylene. The drug is shown to be released at body temperature in an acidic environment. Biphenylene also exhibits excellent cytotoxicity activity and cellular uptake of the drug. Overall, biphenylene shows promise as a potential nanocarrier for cisplatin delivery.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hyun Jeong, Hyeong Chan Suh, Ga Hyun Cho, Rafael Salas-Montiel, Hayoung Ko, Ki Kang Kim, Mun Seok Jeong
Summary: In this study, a potential platform to enhance Raman scattering and increase the number of observable Raman modes in monolayer transition metal dichalcogenides (TMDs) was proposed. The platform consisted of large-scale arrays of gold micropillars (MPs), which were able to enhance the Raman intensity of TMDs and make difficult-to-detect Raman modes observable. The platform showed great industrial advantages and wide applicability due to its low cost, simple process, large controllable area, and short process time.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yasir Abbas, Shafqat Ali, Sajjad Ali, Waqar Azeem, Zareen Zuhra, Haoliang Wang, Mohamed Bououdina, Zhenzhong Sun
Summary: In this study, FeOx@SPNO-C core-shell nanospheres as a catalyst for degradation of sulfamethoxazole (SMX) were successfully synthesized. The synergistic interaction between FeOx and SPNO-C, high carbon charge density, and the presence of C = O groups and N/Fe-Nx sites were found to be key factors for the enhanced degradation of SMX.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Qiaoting Yang, Yuxiao Gong, Yan Qian, Zhou-Qing Xiao, Serge Cosnier, Xue-Ji Zhang, Robert S. Marks, Dan Shan
Summary: This study proposes a hierarchical confinement strategy to design Prussian blue nanoparticles (PB NPs) with satisfactory electrocatalytic ability and stability. The catalytic synthesis of PB NPs is achieved through a hydrothermal process, and the as-prepared PB@NH2MIL exhibits efficient electronic transmission and enhanced electrocatalytic properties.
APPLIED SURFACE SCIENCE
(2024)