Article
Chemistry, Multidisciplinary
Teng Ma, Baicheng Yao, Zebo Zheng, Zhibo Liu, Wei Ma, Maolin Chen, Huanjun Chen, Shaozhi Deng, Ningsheng Xu, Qiaoliang Bao, Dong-Ming Sun, Hui-Ming Cheng, Wencai Ren
Summary: This study reports a method to co-excite multiple graphene plasmons on one single graphene sheet. By heteroepitaxial growth, a polycrystalline graphene monolayer with patterned gradient grain boundary density was created, enabling varied plasmon co-excitation in the nanoscale. Rich plasmon standing waves and plasmonic hotspots were observed using high-resolution scanning near-field optical microscopy. The plasmonic wavelengths can be widely tuned by changing the grain boundary density and annealing process.
Article
Chemistry, Physical
Jongpil Ye, Jaehoon Jeong
Summary: The grain structure of graphene significantly influences its properties, making it crucial to control for application. Inconsistent results regarding the correlation between the grain structures of graphene and underlying Cu have been found in previous investigations. Research suggests that the origin of this discrepancy lies in the effects of copper grain boundary structure on graphene growth.
Article
Chemistry, Multidisciplinary
Saiyu Bu, Yao Chen, Debra J. Searles, Qinghong Yuan
Summary: Crystal domain alignment is crucial for the synthesis of large, single-crystal, two-dimensional materials. However, achieving the alignment has remained unclear. In this study, a physical model and first principles calculations were used to explain the lack of alignment in graphene domains grown on the Cu(111) surface. It was found that small hexagonal graphene domains are always misaligned on the substrate due to preferred binding sites. Only when the domains reach a certain size, near-perfect alignment can be achieved. The results highlight the importance of low nucleation density for epitaxial alignment of graphene domains on Cu(111) surfaces.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Engineering, Environmental
Yue Wang, Fangzhu Qing, Yi Jia, Yinwu Duan, Changqing Shen, Yuting Hou, Yuting Niu, Haofei Shi, Xuesong Li
Summary: The breathing CVD method effectively utilizes reactor space to produce large-area graphene films with a small reactor. This method significantly increases the size and throughput of graphene films compared to conventional methods.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Shiwei Wang, Chunyang Zheng, Xiucai Sun, Yixuan Zhao, Shengping Zhang, Qingqing Liu, Jiawei Yang, Yeshu Zhu, Jiaxin Shao, Mingyue Wei, Wanjian Yin, Jianbo Yin, Li Lin, Kaicheng Jia, Zhongfan Liu
Summary: An efficient method was demonstrated to synthesize centimeter-sized graphene films with over 80% bilayer ratio on confined Cu substrates. The obtained bilayer graphene films showed a 100% AB-stacking structure confirmed by transmission electron microscopy and Raman characterization. The high quality of the bilayer graphene films was also evidenced by tunable band-gap and uniform optical transmittance. This work provides new insights into graphene growth with controlled layer thickness and a new choice for AB-stacked bilayer graphene film production.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Fengning Liu, Jichen Dong, Na Yeon Kim, Zonghoon Lee, Feng Ding
Summary: The study presents a general model to elucidate the formation mechanism of grain boundaries in 2D materials and successfully synthesizes twinned 2D materials on a liquid substrate, demonstrating the growth of twinned graphene. Well-defined twin boundaries in graphene can be selectively etched by hydrogen gas due to preferential adsorption of hydrogen atoms, paving the way to grow various 2D nanostructures with controlled grain boundaries.
Article
Chemistry, Multidisciplinary
Paul Leidinger, Juergen Kraus, Sebastian Guenther
Summary: The kinetics of graphene chemical vapor deposition on Cu in CH4 + H-2 were studied, revealing a growth model that accurately predicted graphene size increase over time. The model successfully related CVD parameters to methane decomposition and accurately determined flake size increase. The study's results can be used to calibrate hot wall CVD reactors for graphene growth on Cu.
Article
Chemistry, Physical
Yi Ouyang, Gang Lou, Ying Xie, Wei Wang, Zhaoping Liu
Summary: The aligned nucleation of graphene domains is crucial for the large-area growth of single-crystal graphene. The relationship between graphene grown on different grains in polycrystalline substrates was not well understood. This study reveals that the orientations of graphene grown on vicinal Cu (111) surface and high-index facets of polycrystalline Cu substrate can be related by Euler angles, providing important insight into the oriented growth of graphene via multi-seed method.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Zhijuan Zhao, Tianyu Hou, Nannan Wu, Shuping Jiao, Ke Zhou, Jun Yin, Ji Won Suk, Xu Cui, Mingfei Zhang, Shaopeng Li, Yan Qu, Weiguang Xie, Xi-Bo Li, Chuanxi Zhao, Yong Fu, Rong-Dun Hong, Shengshi Guo, Dingqu Lin, Weiwei Cai, Wenjie Mai, Zhengtang Luo, Yongtao Tian, Yun Lai, Yuanyue Liu, Luigi Colombo, Yufeng Hao
Summary: The study reveals that using atomically thin, polycrystalline few-layer graphene (FLG) as a protective coating film can effectively prevent metal corrosion in atmospheric environments by exploiting the misalignment of grain boundaries and energy barrier to corrosive molecules diffusion.
Article
Multidisciplinary Sciences
Jincan Zhang, Xiaoting Liu, Mengqi Zhang, Rui Zhang, Huy Q. Ta, Jianbo Sun, Wendong Wang, Wenqing Zhu, Tiantian Fang, Kaicheng Jia, Xiucai Sun, Xintong Zhang, Yeshu Zhu, Jiaxin Shao, Yuchen Liu, Xin Gao, Qian Yang, Luzhao Sun, Qin Li, Fushun Liang, Heng Chen, Liming Zheng, Fuyi Wang, Wanjian Yin, Xiaoding Wei, Jianbo Yin, Thomas Gemming, Mark. H. Rummeli, Haihui Liu, Hailin Peng, Li Lin, Zhongfan Liu
Summary: The authors demonstrate the fast synthesis of high-coverage meter-scale bilayer graphene on commercial Cu foils by introducing CO2 during the growth process. This work provides important insights into the growth mechanism and mass production of large-area high-quality bilayer graphene on Cu.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Yunqing Li, Myeonggi Choe, Sunghwan Jin, Da Luo, Pavel V. Bakharev, Won Kyung Seong, Feng Ding, Zonghoon Lee, Rodney S. Ruoff
Summary: The authors report the growth of micrometer-long single-crystal graphene ribbons with tapered or uniform width using silica particle seeds on single crystal Cu foils. The growth mechanism involves catalytic activation of ethylene and attachment of C atoms or species at the edges, as well as longitudinal growth driven by VLS mechanism.
Article
Chemistry, Physical
Stefanos Chaitoglou, Roger Amade, Enric Bertran
Summary: Currently, extensive research is being conducted to meet the demand for sustainable hydrogen production, with a focus on developing efficient and cost-effective materials. Graphene is seen as an ideal candidate due to its abundant nature and ability to form beneficial nanostructures. The study demonstrates the inherent electrocatalytic activity of graphene nanowalls (GNWs) towards hydrogen evolution reaction (HER).
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Min Seok Yoo, Hyo Chan Lee, Seon Baek Lee, Kilwon Cho
Summary: A one-step CVD method utilizing a copper-phosphorus eutectic system as a catalyst is proposed for growing multilayer graphene with tunable doping types. The method allows for simultaneous control of graphene thickness and doping level during synthesis, while enabling patterned growth of MLG at the microscale. The resulting phosphorus-doped graphene demonstrates a tunable doping state, from large n-type doping to p-type doping.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Yixuan Fan, Menghan Li, Xiangzheng Jia, Lin Li, Qing Zhang, Enlai Gao, Dechao Geng, Wenping Hu
Summary: The precise engineering of nucleation and growth of graphene has been achieved by introducing a liquid Cu-Ag alloy, allowing for controllable formation of round-shaped graphene arrays. The growth mechanism of graphene on the liquid Cu-Ag catalysts is explained by binding energy between graphene and metal surfaces, pointing towards potential industrial production and commercial applications.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Danielle Reifsnyder Hickey, Nadire Nayir, Mikhail Chubarov, Tanushree H. Choudhury, Saiphaneendra Bachu, Leixin Miao, Yuanxi Wang, Chenhao Qian, Vincent H. Crespi, Joan M. Redwing, Adri C. T. van Duin, Nasim Alem
Summary: The study investigates the crystal growth mechanisms and defect formation of WS2, revealing its microstructure and orientation characteristics through electron microscopy imaging and molecular dynamics simulations. It reveals the relationship between defects and grain boundaries, as well as the tilting of the film when released from the substrate. Statistical analysis reveals that microstructural features are constructed from nanometer-scale building blocks, describing the system across length scales from sub-Angstrom to multimicrometer.
Review
Computer Science, Artificial Intelligence
Jinghua Zhang, Chen Li, Yimin Yin, Jiawei Zhang, Marcin Grzegorzek
Summary: Microorganisms are widely distributed in human daily living environment and play essential roles in environmental pollution control and health. Automatic microorganism image analysis faces challenges such as the need for robust algorithms and addressing image characteristic issues.
ARTIFICIAL INTELLIGENCE REVIEW
(2023)
Article
Chemistry, Physical
Yuling Yin, Feng Ding, Qinghong Yuan
Summary: In this study, it was found through theoretical calculations that functionalizing the edges of BP with C60 can stabilize BP and improve its performance in optoelectronics.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Jiadong Zhou, Chao Zhu, Yao Zhou, Jichen Dong, Peiling Li, Zhaowei Zhang, Zhen Wang, Yung-Chang Lin, Jia Shi, Runwu Zhang, Yanzhen Zheng, Huimei Yu, Bijun Tang, Fucai Liu, Lin Wang, Liwei Liu, Gui-Bin Liu, Weida Hu, Yanfeng Gao, Haitao Yang, Weibo Gao, Li Lu, Yeliang Wang, Kazu Suenaga, Guangtong Liu, Feng Ding, Yugui Yao, Zheng Liu
Summary: This study reveals a competitive-chemical-reaction-based growth mechanism that allows for the growth of transition metal chalcogenides and transition metal phosphorous chalcogenides with different compositions and phases. It provides an interesting platform for the exploration of 2D TMPCs and TMCs.
Review
Chemistry, Multidisciplinary
Yanqing Guo, Yishan Hu, Qinghong Yuan
Summary: The scalable preparation of high-quality and low-cost two-dimensional (2D) materials is critical for their potential applications. Chemical vapor deposition (CVD) method is one of the most promising methods for producing ultrathin 2D materials. First-principles calculations play an important role in theoretical research. This review presents recent advances in the growth mechanism of 2D materials, with a focus on the theoretical research progress of four typical 2D materials, and proposes strategies for wafer-scale growth of continuous and homogeneous 2D thin films.
WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Jichen Dong, Degong Ding, Chuanhong Jin, Yunqi Liu, Feng Ding
Summary: We present a systematic theoretical study on the CVD growth mechanism of MoS2 and propose a transition of growth from Mo-II edges to S-III edges and Mo-III edges by tuning the growth condition from Mo-rich to S-rich. This study provides a general guideline on theoretical studies of 2D crystals' growth mechanisms and deepens our understanding on the growth mechanism of multielement 2D crystals.
Article
Chemistry, Physical
Ziwei Xu, Feng Ding
Summary: This study reveals that the shape of the catalyst has an impact on the formation process of SWCNTs, and that using catalyst particles with higher curvature and catalytic reactions involving Pt adatom on the catalyst surface can promote the synthesis of SWCNTs.
Article
Chemistry, Multidisciplinary
Yuting Liu, Yuan Fang, Qinghong Yuan, Jiaxing Lu, Huan Wang
Summary: This study uses a simple one-pot method to prepare B-doped AuCu alloy materials, which show superior faradaic efficiency for CO. The incorporation of B tunes the electronic structure of AuCu, promoting the adsorption of CO intermediates and facilitating the conversion of CO2 to CO. These findings provide a good approach for designing highly active alloy catalysts for converting CO2 to CO.
Article
Chemistry, Physical
Yunjae Park, Yong Wang, Vladislav Gladkikh, Daniel Hedman, Xiao Kong, Feng Ding
Summary: In this study, the thermodynamic properties of two-dimensional boron materials were explored through DFT and Monte Carlo simulations. New phases of borophene were discovered, including a glass state, liquid borophene, and borophene with large holes. A phase diagram of borophene was constructed to guide future experiments at high temperatures.
NANOSCALE HORIZONS
(2023)
Article
Chemistry, Multidisciplinary
Yuyi Zhang, Yuting Du, Qinghong Yuan, Chao Hang, Xiaolei Zhang, Bingwen Hu, Qingyuan Jin, Mengdi Chen
Summary: In this study, it was discovered that mixing 2-(2-hydroxyphenyl)-1H-benzimidazole (HPBI) molecules with zeolitic imidazolate framework-8 (ZIF-8) colloidal suspensions resulted in significantly enhanced fluorescence. Through various techniques, it was found that HPBI molecules adsorbed onto the surface of ZIF-8 particles coordinatively and electrostatically, forming a new type of fluorescence emitter. These emitters were distributed periodically on the outer surface of ZIF-8 particles, with fixed distances smaller than the excitation light wavelength, suggesting the possibility of triggering collective spontaneous emission.
Article
Chemistry, Physical
Cheng Chen, Yuling Yin, Rencong Zhang, Qinghong Yuan, Yang Xu, Yushuang Zhang, Jie Chen, Yan Zhang, Chang Li, Junyong Wang, Jie Li, Linfeng Fei, Qiang Yu, Zheng Zhou, Huisheng Zhang, Ruiqing Cheng, Zhuo Dong, Xiaohong Xu, Anlian Pan, Kai Zhang, Jun He
Summary: Black phosphorus (BP), a promising semiconductor material, has the potential to surpass traditional silicon-based devices in the field of next-generation electronics and optoelectronics due to its high mobility and tunable direct bandgap. This study successfully develops a sustained feedstock release strategy to grow subcentimetre-size single-crystal BP films, which exhibit high crystal quality and remarkable electrical properties. Furthermore, the approach is expanded to the growth of single-crystal BP alloy films, extending the infrared emission range of BP. This work will greatly advance the development of high-performance electronics and optoelectronics based on BP family materials.
Article
Multidisciplinary Sciences
Lu Qiu, Xiuyun Zhang, Xiao Kong, Izaac Mitchell, Tianying Yan, Sung Youb Kim, Boris I. Yakobson, Feng Ding
Summary: In chemistry, the theory of aromaticity or pi bond resonance is crucial for understanding the stability and properties of organic molecules. This study presents an analogue theory for sigma bond resonance in flat boron materials, allowing for the determination of two-center two-electron and three-center two-electron bond distributions without quantum calculations. Based on this theory, three rules are proposed for drawing Kekule-like bonding configurations and exploring properties of flat boron materials. Additionally, the theory is applied to explain the stability of neutral borophene with approximately 1/9 hole occupancy and the effect of charge doping on borophene's optimal hole concentration. This theory enhances our understanding of boron materials and facilitates the rational design of boron-based materials.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Wookhee Lee, Daniel Hedman, Jichen Dong, Leining Zhang, Zonghoon Lee, Sung Youb Kim, Feng Ding
Summary: It is necessary to consider the kink energy, which is the energy of the junction between armchair and zigzag sites, when accurately calculating the formation energy of graphene edges with various functional groups. The kink energies of graphene edges with different functional groups are all negative, indicating that kink formation stabilizes the chiral graphene edges.
Article
Chemistry, Multidisciplinary
Wenjie Wu, Saiyu Bu, Liang Bai, Yuanting Su, Yenan Song, Haitao Sun, Guangyin Zhen, Ke Dong, Lunhua Deng, Qinghong Yuan, Chengbin Jing, Zhuo Sun
Summary: Non-thermal plasma (NTP) degradation of volatile organic compounds (VOCs) into CO2 and H2O is a promising strategy for addressing environmental pollution. However, its implementation is hindered by low conversion efficiency and emissions of noxious by-products. In this study, an advanced low-oxygen-pressure calcination process was developed to tune the oxygen vacancy concentration of TiO2 nanocrystals. Vo-rich TiO2 showed superior catalytic activity in the degradation of toluene, achieving a maximum elimination efficiency of 96% and COx selectivity of 76% at an SIE of 540 J L-1. Mechanistic analysis revealed the contribution of O-1(2), O-2(-), and OH species derived from Vo sites in the decomposition of toluene. The roles of oxygen vacancies in manipulating post-NTP systems were explored, providing insights for the design of high-efficiency NTP catalysts with active Vo sites.
Review
Chemistry, Multidisciplinary
Xiao Kong, Chengrui Fu, Vladislav Gladkikh, Feng Ding
Summary: The review summarizes the shapes and growth/etching mechanisms of 2D islands in the chemical vapor deposition (CVD) process. It discusses various aspects including attachment-limited and diffusion-limited growth, etching, and merging of 2D materials. The review also explores the growth and etching of multilayered 2D islands during CVD, which is an ongoing topic of research.
Article
Chemistry, Physical
Lin Geng, Chao Zhao, Jitong Yan, Chengrui Fu, Xuedong Zhang, Jingming Yao, Haiming Sun, Yong Su, Qiunan Liu, Liqiang Zhang, Yongfu Tang, Feng Ding, Jianyu Huang
Summary: This study presents in situ imaging of the dynamics of sodium (Na) deposition and stripping using a nano-electrochemical device in an advanced aberration corrected environmental transmission electron microscope (ETEM). The research reveals the formation of dodecahedral Na nanocrystals with {110} exposed surfaces during deposition. During stripping, Na atoms were extracted layer-by-layer along the {110} planes and switched to the {112} planes when encountering the corners of the dodecahedral structure. Density functional theory (DFT) calculations suggest that the crystallography of Na deposition and stripping is controlled by a minimum energy path or Wulff's law.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
