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)
Article
Chemistry, Multidisciplinary
Azimkhan Kozhakhmetov, Samuel Stolz, Anne Marie Z. Tan, Rahul Pendurthi, Saiphaneendra Bachu, Furkan Turker, Nasim Alem, Jessica Kachian, Saptarshi Das, Richard G. Hennig, Oliver Groning, Bruno Schuler, Joshua A. Robinson
Summary: This study reports the successful scalable growth and vanadium doping of 2D WSe2 at compatible temperatures, confirming p-type doping via substitutional replacement of tungsten by vanadium atoms. The p-type nature of the V dopants is further verified by constructed field-effect transistors.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Binbin Ding, Lianbi Li, Lei Li, Tianming Wang, Changjun Zhu, Song Feng, Zebin Li, Jun Wang, Guoqing Zhang, Yuan Zang, Jichao Hu, Caijuan Xia
Summary: In this study, large-area monolayer MoS2 films were successfully grown on graphene using chemical vapor deposition (CVD) technique with the assistance of oxygen (O2). The introduction of O2 improved the growth environment of MoS2 domains and increased the grain size of MoS2. Spectroscopic results showed the deposition of a monolayer of MoS2 with high crystal quality on graphene. Effective charge transfer was observed in MoS2/graphene heterojunctions. The photodetector prepared by MoS2/graphene film exhibited good response to light. These findings indicate the great potential of MoS2/graphene heterojunctions for optoelectronic applications.
Article
Chemistry, Multidisciplinary
Zixuan Wang, Wenshuo Xu, Benxuan Li, Qiaoyan Hao, Di Wu, Dianyu Qi, Haibo Gan, Junpeng Xie, Guo Hong, Wenjing Zhang
Summary: This study reports a facile and controllable method for the selective growth of WS2/MoS2 vertical or lateral heterojunctions on metal substrates. By tuning the hydrogen flow rate, the growth mode can be switched, and the coverage of the heterostructures can be adjusted. The research paves the way for the development of two-dimensional heterostructures for applications in (opto)electronic devices.
Review
Chemistry, Multidisciplinary
Shaohua Li, Decai Ouyang, Na Zhang, Yi Zhang, Akshay Murthy, Yuan Li, Shiyuan Liu, Tianyou Zhai
Summary: This review focuses on the use of substrate engineering strategies for the controlled growth of large-scale 2D transition metal dichalcogenides (TMDs). It provides insights into the interaction between TMDs and substrates and summarizes the effects of various substrate engineering approaches on the growth of 2D TMDs. The review also discusses the opportunities and challenges of substrate engineering for the future development of 2D TMDs.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Minyu Bai, Shuai Wen, Jijie Zhao, Yuxuan Du, Fei Xie, Huan Liu
Summary: In the study of the CVD process of 2D MoS2 crystals, different carrier gas flow fields were explored. It was found that adjusting the local carrier gas flow field could achieve the appropriate precursor vapor concentration, leading to the growth of single 2D MoS2 crystals and a higher coating rate on the target substrate surface. The carrier gas flow also played a role in the growth of the 2D MoS2 crystals.
Article
Nanoscience & Nanotechnology
Mula Raju, Meher Wan, Supriti Sen, Chacko Jacob
Summary: High-quality, ultrathin 2D-MoS2 layers with large area were grown on SiO2/Si substrates using atmospheric pressure chemical vapor deposition (APCVD) at elevated temperatures. The shape and edge structure of the MoS2 flakes were significantly influenced by the chemical potential of the Mo and S precursor concentrations. Various techniques, including AFM, Raman, PL, AES, and SEM, were employed to study the surface roughness, thickness, crystalline quality, and optical performance of the MoS2 layers.
Article
Nanoscience & Nanotechnology
Farman Ullah, Je-Ho Lee, Zeeshan Tahir, Abdus Samad, Chinh Tam Le, Jungcheol Kim, Donggyu Kim, Mamoon Ur Rashid, Sol Lee, Kwanpyo Kim, Hyeonsik Cheong, Joon Jang, Maeng-Je Seong, Yong Soo Kim
Summary: Noncentrosymmetric transition-metal dichalcogenides, especially the 3R polymorphs, provide a strong platform for valleytronics. Selective growth of MoS2 monolayers and bilayers from differently oriented substrates in a chemical vapor deposition reactor revealed that the as-grown bilayers are predominantly 3R type, showing significantly higher valley polarization compared to the more common 2H type.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Jie Li, Yan Zhang, Junrong Zhang, Junwei Chu, Liu Xie, Wenzhi Yu, Xinxin Zhao, Cheng Chen, Zhuo Dong, Luyi Huang, Liu Yang, Qiang Yu, Zeqian Ren, Junyong Wang, Yijun Xu, Kai Zhang
Summary: The controllable synthesis of quaternary 2D BiCuSeO nanosheets with excellent ambient stability and intrinsic p-type degeneracy has been achieved by chemical vapor deposition (CVD). These nanosheets can be used to fabricate high-performance tunnel field-effect transistors (TFETs) with adjustable carrier concentration and show potential for practical implementation.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Govindan Kutty Rajendran Nair, Ali Abdelaziem, Xiaoxu Zhao, Xiaowei Wang, Dianyi Hu, Yao Wu, Cao Xun, Frederic Le Goualher, Chao Zhu, Pearly Lau Poh Yin, Vinitha Valsaraj, Teddy Salim, Lin Ke, Zheng Liu
Summary: In this study, 2 nm thick 1T-CrS2 nanosheets were successfully synthesized and characterized. The nanosheets showed stable behavior and exhibited semiconductor properties, making them potential candidates for integration with ultrathin infrared sensor platforms.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Feifei Cao, Shuting Zheng, Jingjing Liang, Zhi Li, Bin Wei, Yiran Ding, Zhongchang Wang, Mengqi Zeng, Nan Xu, Lei Fu
Summary: High-quality ultrathin MoP single crystals were successfully grown on liquid metals via chemical vapor deposition (CVD), and the second harmonic generation (SHG) of 2D MoP was studied for the first time. This research provides a new approach to synthesize and explore other 2D TMPs for future applications.
SCIENCE CHINA-MATERIALS
(2021)
Article
Chemistry, Physical
Guanmeng Li, Weifeng Zhang, Yan Zhang, Yangjin Lee, Zihan Zhao, Xue-zhi Song, Zhenquan Tan, Kwanpyo Kim, Nan Liu
Summary: Synergistic additives, ammonium salts, have been used in the chemical vapor deposition (CVD) growth of MoS2 to achieve controlled domain layering and shape, as well as centimeter-scale films. This method enables direct fabrication of MoS2 electronic devices on clean substrates without the need for transfer steps, and it also promotes improved hydrogen evolution reaction (HER) performance. The use of ammonium salts in CVD paves the way for practical applications of MoS2 in modern electronics and catalysis.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Multidisciplinary Sciences
Qingqing Ji, Cong Su, Nannan Mao, Xuezeng Tian, Juan-Carlos Idrobo, Jianwei Miao, William A. Tisdale, Alex Zettl, Ju Li, Jing Kong
Summary: Research shows that the growth dynamics of MoS2 depend on the type of halogen, leading to the development of a growth model and optimization of growth techniques for achieving large-size MoS2 crystals. This understanding has enabled the fast growth of MoS2 with record-large domain sizes, facilitating practical applications.
Article
Chemistry, Physical
Hanleem Lee, Sora Bak, Joosung Kim, Hyoyoung Lee
Summary: The study focuses on the effects of organic dopants reactivity on MoS2 and how it influences the electrical properties of MoS2. The band state of the dopants causes a proportional shift in the threshold voltages of the field-effect transistors, while on/off current ratio and mobility are strongly influenced by the defect density depending on the reactivity of the doping reaction. Through an in-depth study on the doping reaction, a solution-processed FET and a TFT with high mobility and a relatively high on/off ratio are successfully fabricated.
Article
Chemistry, Multidisciplinary
Yueh-Chun Wu, Takashi Taniguchi, Kenji Watanabe, Jun Yan
Summary: Monolayer transition metal dichalcogenide semiconductors are promising valleytronic materials, and the valley polarized holes are particularly interesting due to their long valley lifetime preserved by the large spin-orbit splitting and spin-valley locking.
Editorial Material
Cardiac & Cardiovascular Systems
Jiajun Guo, Yuanwei Xu, Ke Wan, Shi Chen, Yucheng Chen
CIRCULATION JOURNAL
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Jian Zhang, Yuanwei Xu, Weihao Li, Chao Zhang, Wentao Liu, Dong Li, Yucheng Chen
Summary: This study aimed to evaluate the prognostic value of magnetic resonance imaging (MRI) radiomics analysis of native T1 mapping in dilated cardiomyopathy (DCM). By developing multiple prediction models, it was found that the random forest model based on radiomics combined with clinical and conventional MRI parameters achieved the best performance.
JOURNAL OF MAGNETIC RESONANCE IMAGING
(2023)
Article
Optics
Song Zhu, Wenyu Wang, Linhao Ren, Chaoyang Gong, Yu-Cheng Chen, Lei Shi, Xinliang Zhang
Summary: The generation of EIT and EIA effects in optical cavity systems has various applications, including quantum interference effects, slow light, and light storage. This study proposes and demonstrates TGIT and TGIA effects in a single microcavity, induced by a unique temperature gradient. The platform also enables direct temperature readout with high resolution using photonic barcodes based on TGIT (or TGIA), offering a novel and efficient scheme for dynamic mode coupling in applications like light storage and temperature detection.
LASER & PHOTONICS REVIEWS
(2023)
Article
Computer Science, Artificial Intelligence
Wan Xiang Shen, Shu Ran Liang, Yu Yang Jiang, Yu Zong Chen
Summary: Researchers have developed an algorithm called MEGMA, which transforms metagenomic data into personalized multichannel microbiome 2D representations and improves disease prediction accuracy. This method analyzes microbial profiles through clustering and learning, and combined with ConvNet-based AggMapNet models, outperforms other commonly used machine learning and deep learning models. Additionally, the method reliably identifies disease-prediction microbes (biomarkers).
Article
Physics, Applied
Wennan Hu, Yunlin Liu, Zhangcheng Huang, Jianguo Dong, Yue Wang, Weiao Chen, Zhe Sheng, Haoran Sun, Guangxi Hu, Chunxiao Cong, David Wei Zhang, Ye Lu, Peng Zhou, Zengxing Zhang
Summary: As the scaling of silicon-based integrated circuits becomes more challenging, alternative strategies are being developed, such as vertically stacked ambipolar complementary field-effect transistors composed of two-dimensional materials. These transistors exhibit switchable behavior and are used in a large voltage swing circuit for single photon avalanche detectors. This work could pave the way for future advancements in two-dimensional electronics and high-density integration circuits.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Borgea G. M. Ekoya, Jinkun Han, Junqiang Zhu, Yabing Shan, Ran Liu, Laigui Hu, Zhi-Jun Qiu, Chunxiao Cong
Summary: The collapse of charge density wave (CDW) states in few-layer 2H-TaS2 induced by the interaction with rhodamine 6G (R6G) was investigated using Raman spectroscopy. It was found that the CDW states disappeared in few-layer 2H-TaS2 with R6G adsorbed due to charge transfer. This study provides insights into the mechanisms of CDW states and the control of CDW states under different environmental conditions.
Article
Multidisciplinary Sciences
Huifeng Tian, Yinhang Ma, Zhenjiang Li, Mouyang Cheng, Shoucong Ning, Erxun Han, Mingquan Xu, Peng-Fei Zhang, Kexiang Zhao, Ruijie Li, Yuting Zou, PeiChi Liao, Shulei Yu, Xiaomei Li, Jianlin Wang, Shizhuo Liu, Yifei Li, Xinyu Huang, Zhixin Yao, Dongdong Ding, Junjie Guo, Yuan Huang, Jianming Lu, Yuyan Han, Zhaosheng Wang, Zhi Gang Cheng, Junjiang Liu, Zhi Xu, Kaihui Liu, Peng Gao, Ying Jiang, Li Lin, Xiaoxu Zhao, Lifen Wang, Xuedong Bai, Wangyang Fu, Jie-Yu Wang, Maozhi Li, Ting Lei, Yanfeng Zhang, Yanglong Hou, Jian Pei, Stephen J. Pennycook, Enge Wang, Ji Chen, Wu Zhou, Lei Liu
Summary: By varying the growth temperatures, the degree of disorder and electrical conductivity of amorphous carbon films can be tuned, revealing the causal link between microstructures and macroscopic properties of amorphous materials.
Article
Chemistry, Physical
Qinghai Tan, Abdullah Rasmita, Zhaowei Zhang, Hongbing Cai, Xiangbin Cai, Xuran Dai, Kenji Watanabe, Takashi Taniguchi, Allan H. MacDonald, Weibo Gao
Summary: Using interlayer excitons as a probe, the authors demonstrate that interlayer interactions can be electrically switched on and off in heterobilayers of tungsten diselenide and molybdenum disulfide (WSe2/MoS2), resulting in a layer-dependent correlated phase diagram. They show that these correlated phases affect the decay pathways of interlayer excitons, revealing the role of strong correlation in their dynamics. This study paves the way for studying layer-resolved strong correlation behavior in moire heterostructures.
Article
Chemistry, Physical
Mingquan Xu, De-Liang Bao, Aowen Li, Meng Gao, Dongqian Meng, Ang Li, Shixuan Du, Gang Su, Stephen J. Pennycook, Sokrates T. Pantelides, Wu Zhou
Summary: By improving the stability and sensitivity of the instrument, we have successfully observed the specific vibrational signals between substitutional impurities and neighboring carbon atoms in monolayer graphene. This work allows for the direct observation of local phonon modes with chemical-bonding sensitivity, providing more insights into defect-induced physics in graphene.
Article
Chemistry, Multidisciplinary
Qing Zhang, Chuan Zhou, Menghao Li, Yuanmin Zhu, Xianbin Wei, Shaocheng Shen, Zongwei Ji, Guangfu Luo, Yifeng Cheng, Xuming Yang, Zhijie Wang, Lingfeng Zou, Lin Zeng, Junhao Lin, Lei Li, Joseph S. Francisco, Meng Gu
Summary: High-concentrated non-flammable electrolytes (HCNFE) in lithium metal batteries can prevent thermal runaway accidents, and the microstructure of their solid electrolyte interphase (SEI) has been explored using cryo-HRTEM. The SEI in HCNFE exhibits a uniform laminated crystalline-amorphous structure that prevents further reaction between the electrolyte and lithium. Li2S2O7, the inorganic SEI component, is precisely identified using cryo-HRTEM. Density functional theory (DFT) calculations show that the final Li2S2O7 phase has suitable natural transmission channels for Li-ion diffusion and excellent ionic conductivity of 1.2 x 10(-5) S cm(-1).
Article
Chemistry, Multidisciplinary
Jinkun Han, Xiaofei Yue, Yabing Shan, Jiajun Chen, Borgea G. M. Ekoya, Laigui Hu, Ran Liu, Zhijun Qiu, Chunxiao Cong
Summary: Two-dimensional (2D) materials and their van der Waals stacked heterostructures (vdWH) are rising candidates in flexible nanoelectronics and optoelectronic industry. Strain engineering provides an efficient way to modulate their band structure. This study focuses on strain engineering on monolayer WSe2 and graphene/WSe2 heterostructure, and found that pre-strain process improves the interface contacts and reduces the residual strain, resulting in comparable shift rate of the neutral exciton and trion. These findings are important in guiding the use of 2D materials and their vdWH in flexible and wearable devices.
Article
Chemistry, Multidisciplinary
Hongyan Mei, Guodong Ren, Boyang Zhao, Jad Salman, Gwan Yeong Jung, Huandong Chen, Shantanu Singh, Arashdeep S. Thind, John Cavin, Jordan A. Hachtel, Miaofang Chi, Shanyuan Niu, Graham Joe, Chenghao Wan, Nick Settineri, Simon J. Teat, Bryan C. Chakoumakos, Jayakanth Ravichandran, Rohan Mishra, Mikhail A. Kats
Summary: This work demonstrates that a bulk crystal with subtle periodic modulations in its structure, Sr9/8TiS3, exhibits transparent and positive-uniaxial properties in the mid- to far-infrared range, with extraordinary index n(e) = 4.5 and ordinary index n(o) = 2.4. The unique structural modulations contribute to the formation of highly oriented electron clouds, resulting in record birefringence.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Feifei Zhou, Zhengzhi Jiang, Haidong Liang, Shihao Ru, Andrew A. Bettiol, Weibo Gao
Summary: We systematically investigate the laser and microwave power broadening in continuous-wave optically detected magnetic resonance (ODMR) of the V-(B) over bar ensemble in h-BN. The behaviors of ODMR contrast and line width are revealed as a function of the laser and microwave powers. The results provide important suggestions for further applications of V-(B) over bar centers in quantum information processing and ODMR-based quantum sensing.
Article
Geosciences, Multidisciplinary
Rajan K. Chakrabarty, Nishit J. Shetty, Arashdeep S. Thind, Payton Beeler, Benjamin J. Sumlin, Chenchong Zhang, Pai Liu, Juan C. Idrobo, Kouji Adachi, Nicholas L. Wagner, Joshua P. Schwarz, Adam Ahern, Arthur J. Sedlacek, Andrew Lambe, Conner Daube, Ming Lyu, Chao Liu, Scott Herndon, Timothy B. Onasch, Rohan Mishra
Summary: Observations of smoke plumes in the United States shows that atmospheric short-wave absorption due to wildfire smoke is mainly caused by dark brown carbon particles. Wildfires release large amounts of black carbon and light-absorbing organic carbon, known as brown carbon, into the atmosphere, which disrupts Earth's radiation budget. It is important to quantify these radiative impacts as wildfires are predicted to increase globally.
Article
Engineering, Chemical
Zhen Tian, Juan Luo, Shichang Sun, Xi Zhang, Rui Ma, Junhao Lin, Yi Chen
Summary: This study prepared high-performance Fe SACs (Fe-NC) by microwave heating using Enteromorpha rich in iron and nitrogen as the precursor. The as-prepared catalysts showed hierarchical porous structures with abundant surface functional groups, defective structures, and large specific surface area. The Fe-NC catalyst prepared by microwave heating exhibited better performance in peroxymonosulfate activation and chloroquine phosphate degradation than the catalyst prepared by conventional heating.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)