Article
Chemistry, Inorganic & Nuclear
Debjit Ghoshal, Rajesh Kumar, Nikhil Koratkar
Summary: In this study, a facile approach for controlled one step Rhenium doping in multilayer Molybdenum Disulphide (MoS2) was developed. The morphology of MoS2 was found to be dependent on the dopant concentrations, with a flower-like morphology observed at higher doping concentrations. A clear correlation between the shift in PL and Raman peaks as a function of Re doping concentrations was demonstrated, indicating potential applications of controllably doped thin layers of MoS2 in unexplored areas.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Review
Materials Science, Multidisciplinary
Luyang Wang, Runze Lai, Lichen Zhang, Mengqi Zeng, Lei Fu
Summary: This Review provides a brief introduction to in situ techniques used to capture the growth processes of graphene and discusses its growth mechanisms. It also offers insights into the challenges and future prospects in this emerging research field.
ACS MATERIALS LETTERS
(2022)
Review
Chemistry, Inorganic & Nuclear
Sherif A. Younis, Neha Bhardwaj, Sanjeev K. Bhardwaj, Ki-Hyun Kim, Akash Deep
Summary: Rare earth metal-organic frameworks (RE-MOFs) have attracted significant research interest for their unique properties in various biomedical applications. They show promise for drug delivery, imaging, and sensing fields, but still face challenges in design and utilization.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Assael Cohen, Avinash Patsha, Pranab K. Mohapatra, Miri Kazes, Kamalakannan Ranganathan, Lothar Houben, Dan Oron, Ariel Ismach
Summary: The GE-MOCVD approach improves domain size and crystal quality compared to traditional MOCVD, demonstrating potential for wide integration into various applications.
Article
Chemistry, Multidisciplinary
Tae Soo Kim, Krishna P. Dhakal, Eunpyo Park, Gichang Noh, Hyun-Jun Chai, Youngbum Kim, Saeyoung Oh, Minsoo Kang, Jeongwon Park, Jaewoo Kim, Suhyun Kim, Hu Young Jeong, Sunghwan Bang, Joon Young Kwak, Jeongyong Kim, Kibum Kang
Summary: The gas-phase alkali metal-assisted metal-organic chemical vapor deposition (GAA-MOCVD) method is reported for the growth of 2D transition metal dichalcogenides (TMDCs). This method can be applied to various TMDCs and produce large-scale continuous films. The combination of oxygen and sodium propionate (SP) increases the grain size of MoS2 and enhances nucleation suppression in the GAA-MOCVD process.
Article
Physics, Applied
S. Xu, S. Zhang, J. D. Kirch, S. Suri, N. Pokharel, H. Gao, H. Kim, P. Dhingra, M. L. Lee, D. Botez, L. J. Mawst
Summary: Room-temperature, pulsed-operation lasing of 8.5 μm-emitting InP-based quantum cascade lasers (QCLs) with low threshold-current density and watt-level output power is demonstrated on (001) GaAs substrates grown by metal-organic chemical vapor deposition. The use of nearly fully relaxed InP buffer with strained InAs quantum-dot-like dislocation-filter layers resulted in a smooth terminal buffer-layer surface with low roughness and mid-range threading-dislocation density. High-performance InP-based QCLs emitting near 8 μm can be achieved on lattice-mismatched substrates.
APPLIED PHYSICS LETTERS
(2022)
Review
Chemistry, Multidisciplinary
Xiaomeng Shi, Bo Cao, Jinghai Liu, Jun Zhang, Yaping Du
Summary: The collaboration between rare-earth elements and metal-organic frameworks has brought new possibilities to the field of catalytic conversion, providing promising catalysts or supports for energy conversion, environmental governance, and organic synthesis. RE-MOFs as promising candidates for catalytic conversion have attracted considerable attention.
Article
Green & Sustainable Science & Technology
Zhen Wang, Wei Han
Summary: Rare-earth hexaboride (RB6) nanowires have become the focus of research due to their novel electronic properties and extensive applications. Two main synthesis methods, electronic transport, magnetic properties, and superconducting properties of RB6 nanowires have been extensively studied, with potential applications in field emitters, photodetectors, and energy storage. Further research directions for RB6 nanowires are also discussed.
Article
Multidisciplinary Sciences
Lin Zhang, Li Peng, Yuanchao Lu, Xin Ming, Yuxin Sun, Xiaoyi Xu, Yuxing Xia, Kai Pang, Wenzhang Fang, Ning Huang, Zhen Xu, Yibin Ying, Yingjun Liu, Yingchun Fu, Chao Gao
Summary: This paper presents a wet-interfacial Joule heating approach for synthesizing nanomaterials in a fast, programmable, and energy-saving manner. By confining Joule heat at the substrate-solution interface and inducing instantaneous solvent evaporation, the method accelerates and controls the nucleation and growth of nanomaterials. It achieves high crystallization rates, low energy costs, and low precursor concentrations.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Guoqing Tong, Jiahao Zhang, Tongle Bu, Luis K. Ono, Congyang Zhang, Yuqiang Liu, Chenfeng Ding, Tianhao Wu, Silvia Mariotti, Said Kazaoui, Yabing Qi
Summary: Hybrid chemical vapor deposition (HCVD) is used to fabricate perovskite solar cells/modules (PSCs/PSMs) with the introduction of a passivation layer and a solvent, resulting in improved efficiency and stability. The oxygen loss of SnO2 in the HCVD process is mitigated by potassium sulfamate (H2KNO3S) while the uncoordinated Pb2+ in the perovskite film is passivated. N-methylpyrrolidone (NMP) is used as a solvent to dissolve PbI2 and lower the energy barrier for perovskite nucleation. The use of perovskite seeds further enhances crystal growth and grain size. The resulting solar cells and mini-modules exhibit high power conversion efficiency (PCE) and stable output performance, with excellent operational stability.
ADVANCED ENERGY MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Yuheng Zhang, Jing Yang, Degang Zhao, Feng Liang, Ping Chen, Zongshun Liu
Summary: The study found that changing the flowrate of either the V or III precursor affects the AlN morphology; relying solely on the V/III ratio parameter is insufficient for discussing AlN morphology comprehensively; achieving a smooth AlN surface involves adjusting the surface mobility of Al atoms to an appropriate level.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
Zhejun V. Zhang, Sumeng Liu, Gregory S. Girolami, John R. Abelson
Summary: Growth of metallic ceramic HfB2 by CVD from Hf(BH4)(4) at 220 degrees C exhibits inherent selectivity on Al2O3 over SiO2, due to the higher nucleation density on Al2O3. Modification of the SiO2 surface with tetrakis(dimethylamido)hafnium increases HfB2 nuclei density, decreases coalescence time, and reduces roughness. Pre-treatment on Al2O3 has little effect on the roughness of subsequently grown HfB2 films.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2021)
Article
Chemistry, Physical
Weiqu Chen, Zimin Chen, Zeqi Li, Zeyuan Fei, Yanli Pei, Gang Wang, Zhiyuan He
Summary: High quality epsilon-phase gallium oxide (Ga2O3) thin films have been successfully grown on silicon substrates using metal-organic chemical vapor deposition (MOCVD). The growth pressure is found to be an important parameter that affects the thin film quality.
APPLIED SURFACE SCIENCE
(2022)
Review
Chemistry, Multidisciplinary
Chuang Fan, Wenrou Dong, Yousaf Saira, Yawen Tang, Gengtao Fu, Jong-Min Lee
Summary: Metal-organic frameworks (MOFs) and their derivatives, integrated with rare earth (RE) elements, have shown remarkable potential in the field of photo/electrocatalysis. The incorporation of RE can effectively enhance the catalytic performance of MOFs by regulating their electronic structure and coordination environment. This review provides a comprehensive summary and discussion of the progress and applications of RE-modified MOFs and their derivatives in photo/electrocatalysis, as well as the challenges and prospects for further research.
Article
Chemistry, Physical
Rui Ji, Jing Liao, Lintao Li, Rongji Wen, Mengjie Liu, Yifeng Ren, Jianghua Wu, Yunrui Song, Minru Qi, Zhixing Qiao, Liwei Liu, Chengbing Qin, Yu Deng, Yongtao Tian, Suotang Jia, Yufeng Hao
Summary: In this study, we grew large-scale and high-quality MoSe2 films through metal-organic chemical vapor deposition (MOCVD) guided by the crystalline step edges of miscut sapphire wafers. The nucleation density and growth rate of MoSe2 films were found to be influenced by the step-edge density and growth temperature. MoSe2 domains grown on substrates with higher step-edge density exhibited faster growth, leading to the formation of wafer-scale and continuous MoSe2 films in a short duration. The high crystalline quality of the MoSe2 films was confirmed by Raman and photoluminescence (PL) measurements. This study provides a significant methodology for rapid growth of large-scale TMDCs and may contribute to the application of 2D semiconductors.
Article
Chemistry, Multidisciplinary
Hong Liu, Chao Xu, Qundong Xia, Yunbin Ying, Qiang Li, Xiaoyu Zhao, Yongjun Zhang, Shikuan Yang
Summary: In this study, a new type of structural color material is reported, which is achieved by filling polystyrene nanospheres into silver brochosomes. The color is originated from the enhanced electromagnetic resonances of the polystyrene nanospheres by the surrounding metallic nanobowls. The color can be modified by tuning the diameter of the polystyrene nanospheres through plasma etching treatment. This material exhibits promising applications in the field of structural colors due to its simple fabrication process and easy processability.
Article
Engineering, Electrical & Electronic
Vyacheslav Solovyov, Hyunwoo Kim, Paul Farrell
Summary: In this study, we investigated the impact of parasitic ground plane resonances on the performance of coplanar waveguides made from YBCO-on-Kapton material. It was found that dense rows stitching vias are essential for isolating the lines below 60 dB at 6 GHz. We demonstrated a metalized via technology compatible with both traditional Flexible Printed Circuit (FPC) process and epitaxial YBCO material. It was shown that stitching via fence with a via period of 10 mm effectively suppresses parasitic resonances at 77 K.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Yuanyuan Ma, Jingfang Mao, Xinguo Liu, Zhongying Dai, Hui Zhang, Xinyang Zhang, Qiang Li
Summary: This study explored a deep learning-based framework to segment iGTV rapidly and accurately in 4D CT images for lung cancers. The results showed that the proposed networks with multi-channel multi-path and convolutional GRU improved the segmentation accuracy but reduced the segmentation efficiency. Different fusion strategies also had different effects on similarity and distance metrics.
Correction
Optics
Meiyan Pan, Yifei Fu, Mengjie Zheng, Hao Chen, Yujia Zang, Huigao Duan, Qiang Li, Min Qiu, Yueqiang Hu
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Chemistry, Physical
Matthias Riegraf, Katherine Develos-Bagarinao, Indro Biswas, Remi Costa
Summary: High-temperature solid oxide cells (SOC) have superior Faradaic and energetic efficiencies in carbon dioxide electrolysis. However, the required gas quality and impurity level for low degradation rates in their commercial application are still unclear. This study shows that the polarization resistance of electrolyte-supported cells (ESC) degrades over time due to sulfur impurities in the CO/CO2 gas mixtures. The degradation is less severe for Ni/Gadolinia-doped ceria (Ni/CGO) fuel electrodes compared to Ni/Yttria-stabilized zirconia (YSZ), and when hydrogen is introduced into the feed gas. The results highlight the importance of feed gas purity and the need for advanced cleaning units in the commercialization of high-temperature CO2 electrolysis.
JOURNAL OF POWER SOURCES
(2023)
Article
Optics
Jianghui Liu, Qiang Li, Junbo Liu, Song Hu, Chunchao Qi
Summary: In this work, a structure-illumination based wafer focus measuring system (SI-WFMS) was proposed, which can measure the vertical defocus distance of the exposure area with less than 0.06 μm error in a single-step sampling process. The SI-WFMS can also rapidly measure the surface profile and tilt angle of the wafer, saving measuring time and improving manufacturing efficiency.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Chemistry, Physical
Takuya Yamaguchi, Tomohiro Ishiyama, Haruo Kishimoto, Katherine Develos-Bagarinao, Katsuhiko Yamaji
Summary: Deuteron distribution in polycrystalline 10GDC was examined using NanoSIMS, revealing deuteron dissolution mainly at grain boundaries. The enrichment of Gd at grain boundaries was observed, prompting an investigation of the effect of Gd concentration on deuteron solubility. The study found that as Gd concentration increased, the bulk deuteron solubility significantly increased, suggesting that Gd enrichment contributes to the high solubility of protons/deuterons at grain boundaries. The enhanced solubility can be attributed to the higher oxygen basicity resulting from the lower electronegativity of Gd3+ compared to Ce4+.
SOLID STATE IONICS
(2023)
Article
Materials Science, Coatings & Films
Sahil Sharma, Carlos A. Favela, Bo Yu, Eduard Galstyan, Venkat Selvamanickam
Summary: We demonstrate the improvement of power conversion efficiency by introducing a germanium (Ge) interlayer in a GaAs solar cell. This eliminates the need for expensive chemical mechanical polishing processes, reducing manufacturing costs.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Jithin Sai Sandra, Mahesh Paidpilli, Sicong Sun, Martha Suarez-Villagran, Vamsi Yerraguravagari, Jarek Wosik, Venkat Selvamanickam
Summary: We developed a buffer architecture using a nonmetallic substrate for epitaxial growth of a REBCO film. A flexible YSZ substrate with good dielectric properties and low thermal conductivity was used, and high-quality MgO and LMO layers were deposited on it. The REBCO films on the flexible YSZ showed comparable performance to those on the sapphire substrate.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Engineering, Electrical & Electronic
N. Castaneda, G. Majkic, F. Robles, V. Selvamanickam
Summary: In this study, the possibility of using Raman spectroscopy features to provide insight into the performance of RECBO films is explored. A secondary peak near the Cu2 peak is identified as a feature that correlates with J(c)(B,T) at intermediate fields and temperatures. The intensity of this peak has a strong negative correlation with J(c)(B,T), with Pearson correlation coefficient -0.88 to -0.97.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Engineering, Electrical & Electronic
M. Suarez-Villagran, G. Majkic, J. Wosik, V. Selvamanickam
Summary: In this study, we used rf/microwave standing waves in REBCO tapes to develop a nondestructive technique for quench detection. REBCO tape can be considered as a transmission line for electromagnetic waves at high frequencies or as a capacitor at low frequencies. The standing waves in the transmission line can be excited either capacitively or inductively, which provides flexibility for circuit optimization. The standing waves are sensitive to any changes in uniformity or material properties, and upon quench initiation, the standing waves are disturbed and can be sensed by a network analyzer.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Physics, Applied
Venkat Selvamanickam
Summary: This article takes a look back at the past 36 years to explore the journey of realizing the potential of high temperature superconductors (HTS) that had generated worldwide excitement upon their discovery. Significant advances have been made in materials science and manufacturing techniques to overcome various challenges in implementing HTS in practical applications.
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
(2023)
Article
Physics, Applied
M. Paidpilli, J. Sai Sandra, B. Sarangi, C. Goel, E. Galstyan, G. Majkic, V Selvamanickam
Summary: This study demonstrates an approach to fabricate double-sided, high-current RE-Ba2Cu3O7-δ (REBCO) tapes for ultrahigh-field superconducting magnets operating at and above 20 T. They modified their A-MOCVD reactor to deposit REBCO films on each side of a double-sided buffer substrate in one pass. The characteristics of 1 μm-thick REBCO films on each side of the double-sided tapes were compared. The double-sided REBCO tape with 2 μm-thick films on each side exhibited a self-field critical current density (Jc) over 2.6 MA cm(-2) at 77 K and 0 T. The 15%-Zr-added double-sided REBCO tape showed Ic over 530 A/4 mm at 20 K, 20 T.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Katherine Develos-Bagarinao, Toshiaki Yamaguchi, Haruo Kishimoto
Summary: In order to improve the performance and stability of solid oxide cells (SOCs), this study compares anode-supported cells with thin films to those with conventional screen-printed yttria-stabilized zirconia (YSZ). It is found that thin film structures can suppress nickel diffusion and reduce resistance, resulting in excellent performance and durability in fuel cell operation.
Article
Chemistry, Physical
Shu-Sheng Liu, Katherine Develos-Bagarinao, Riyan Achmad Budiman, Tomohiro Ishiyama, Haruo Kishimoto, Katsuhiko Yamaji
Summary: This study investigates the early-stage degradation behavior of a porous LSCF cathode in a solid oxide fuel cell. The results show that both wet conditions and bias have a negative effect on the electrochemical and transport characteristics, leading to the most severe degradation. Nano-segregation occurs in all the cathodes after operation, and the size and distribution of segregations vary with the conditions. These changes result in the deactivation of surface O exchange, which is believed to be the dominant reason for the performance degradation.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
