Article
Chemistry, Multidisciplinary
Lukas Grossmann, Eva Ringel, Atena Rastgoo-Lahrood, Benjamin T. King, Johanna Rosen, Wolfgang M. Heckl, Dorina Opris, Jonas Bjoerk, Markus Lackinger
Summary: Currently, there is limited research on the self-assembly of three-dimensional molecules on surfaces. These molecules have a greater variability in their modes of adsorption compared to (nearly) planar molecules. This variability can significantly affect the expression of intermolecular binding motifs and the formation of supramolecular structures. The study found that molecule-surface interactions can be tuned to facilitate crystal engineering in two dimensions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Review
Chemistry, Multidisciplinary
Wenbing Peng, Haolin Wang, Hui Lu, Lei Yin, Yue Wang, Bruno Grandidier, Deren Yang, Xiaodong Pi
Summary: Understanding the band alignment, interface states, interface coupling, and carrier transport properties of semiconductor heterojunctions (SHs) is crucial for designing and fabricating semiconductor structures and devices. STM and STS have played significant roles in studying the properties of SHs, such as spatial structures and electronic band structures, to propose mechanisms for carrier transport.
Review
Polymer Science
Zhi Li, Yanan Li, Chengjie Yin
Summary: This article discusses the phenomenon of ordered self-assembly on solid substrates, and its importance in both fundamental surface science research and its applications in nanotechnology. By utilizing scanning tunneling microscopy (STM), researchers can investigate the structural transition of self-assembled molecules and provide advanced methods for controlling and regulating self-assembly structures.
Article
Chemistry, Multidisciplinary
Shanchao Tan, Wendi Luo, Yongjie Zhang, Xiang-Kui Ren, Yuhong Liu, Zhijian Chen, Qingdao Zeng
Summary: The self-assembly process of a BODIPY derivative functionalized with uracil groups was thoroughly investigated using STM and DFT methods. The formation of hydrogen bonds between uracil groups was identified as the key factor contributing to the construction of ordered self-assembly structure. Additionally, the nanotribological property of the self-assembly on HOPG surface was measured using AFM.
FRONTIERS IN CHEMISTRY
(2021)
Article
Engineering, Chemical
Wan-Tzu Yen, Ke-Hsuan Wang, Masaaki Yoshida, Murugesan Balamurugan, Takeshi Kawai, Shanmugamathan Venkatesan, Yuh-Lang Lee
Summary: In this study, dodecylamine is used as a model molecule to investigate its self-assembly behavior on an Au surface. The results show weak interaction and slow adsorption of DDA with the gold surface, with molecules arranged in a flat-lying orientation.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Chemistry, Multidisciplinary
Tobias Weiss, Aleksandr Baklanov, Georg S. Michelitsch, Karsten Reuter, Martin Schwarz, Manuela Garnica, Willi Auwarter
Summary: This study presents the first real space characterization of borazine molecules and their self-assemblies on solid supports. The adsorption of borazine on Ag(111) surface is weak and non-dissociative, with the ring aligned parallel to the surface plane. Borazine molecules prefer hollow adsorption sites, leading to the assembly of both porous and dense-packed structures. STM-based manipulation is demonstrated to modify the borazine adsorption configuration.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Deng-Yuan Li, Ya-Cheng Zhu, Shi-Wen Li, Chen-Hui Shu, Pei-Nian Liu
Summary: This study achieved the on-surface post-functionalization of supramolecular polymers on gold surfaces, and discovered an enantioselective on-surface reaction induced by the chirality of the supramolecular polymers. Mechanistic analysis and DFT calculations revealed high enantioselectivity during the addition of ICBP to the chiral SP intermediate.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Qilong Wu, Meysam Bagheri Tagani, Lijie Zhang, Jing Wang, Yu Xia, Li Zhang, Sheng-Yi Xie, Yuan Tian, Long-Jing Yin, Wen Zhang, Alexander N. Rudenko, Andrew T. S. Wee, Ping Kwan Johnny Wong, Zhihui Qin
Summary: In this study, we demonstrate the electronic tuning ability at the WSe2/Au interface using twist engineering. By changing the twist angle, we are able to modulate the carrier doping in WSe2 from intrinsic p-type to n-type. We further achieve an n-p-n-type WSe2 homojunction by achieving a strong coupling interface. Additionally, we find that germanium intercalation can recover the intrinsic doping of WSe2. Our findings reveal the influence of twist angle and intercalation on interface doping.
Article
Chemistry, Multidisciplinary
Peng Lei, Lin Ma, Siqi Zhang, Jianqiao Li, Linlin Gan, Ke Deng, Wubiao Duan, Wei Li, Qingdao Zeng
Summary: This study investigates the self-assembled behavior of an unsymmetric molecule (BCDTDA) and the regulatory behaviors of COR and three bipyridine derivatives on BCDTDA self-assembly structures. STM is used to observe the variation of assembled behaviors at the solid-liquid interface. The concentration effect leads to the formation of hydrogen bonded dimers, and the regulatory molecules either maintain or destroy the dimeric structure of BCDTDA, forming different co-assembled structures. The discovery of molecular interactions provides a promising strategy for the construction of functional nanostructures and devices.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Physical
Peng Lei, Yang Feng, Ting Meng, Yufei Zhang, Xunwen Xiao, Ke Deng, Yi Liu, Qingdao Zeng
Summary: This study reveals the self-assembly structures of three X-shaped aggregation-induced emission molecules using scanning tunneling microscopy and density functional theory. The results show that the functional groups and solution concentration have significant effects on the self-assembly structures.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Fengru Zheng, Jiayi Lu, Zhiwen Zhu, Hao Jiang, Yuyi Yan, Yu He, Shaoxuan Yuan, Qiang Sun
Summary: In this study, a graph neural network was used to predict the self-assembly of functional polycyclic aromatic hydrocarbons (PAHs) on metal surfaces. Experimental data from scanning tunneling microscopy (STM) were used to train the model. Compared to traditional machine learning algorithms, our model exhibited better predictive performance. The generalization of the model was further verified by comparing the predictions with experimental results of different functionalized molecules. Our results demonstrate the possibility of using trained experimental data sets to predict and design nanostructures with functional molecules.
Article
Chemistry, Multidisciplinary
Fengru Zheng, Jiayi Lu, Zhiwen Zhu, Hao Jiang, Yuyi Yan, Yu He, Shaoxuan Yuan, Qiang Sun
Summary: The application of supramolecular chemistry on solid surfaces has been widely studied. Machine learning (ML) has become an exciting tool in material research, allowing for efficient and accurate predictions of molecular properties. In this work, a graph neural network was used to predict the self-assembly of functional polycyclic aromatic hydrocarbons (PAHs) on metal surfaces. The model showed better predictive performance compared to traditional ML algorithms, and its generalization was verified through comparisons with experimental results of different functionalized molecules.
Article
Chemistry, Physical
Ping Zhang, Linjie Chen, Shaoxiang Sheng, Wenqi Hu, Huiru Liu, Chen Ma, Zijia Liu, Baojie Feng, Peng Cheng, Yiqi Zhang, Lan Chen, Jin Zhao, Kehui Wu
Summary: This study investigated the adsorption and self-assembly structures of melamine molecules on an Ag(111) surface using low temperature scanning tunneling microscopy (STM) combined with tip-enhanced Raman spectroscopy (TERS). Two ordered self-assembly phases of melamine molecules on Ag(111) were observed, and it was found that the dehydrogenation of melamine can be controlled by annealing the sample or through a tip-enhanced photo-catalytic effect.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Mariano D. Jimenez-Sanchez, Nour Sanchez-Abad, Nicoleta Nicoara, Jose M. Gomez-Rodriguez
Summary: In this study, the self-assembled structure and electronic structure of chloroaluminum phthalocyanines (ClAlPc) on graphene grown on Pt(111) surfaces were investigated using scanning tunneling microscopy (STM) under ultrahigh vacuum (UHV) and low-temperature conditions. Well-ordered molecular islands with rotational domains were observed in the submonolayer regime, with the ClAlPc molecules adopting a Cl-Up configuration. The correlation between molecular lattice orientation and graphene directions was identified, while no influence of the underlying moire ' patterns was found.
Article
Chemistry, Physical
Shijie Sun, Baijin Li, Wei Xiong, Boyu Fu, Yong Zhang, Zilin Ruan, Lei Gao, Xiaoqing Zuo, Jianchen Lu, Jinming Cai
Summary: Supramolecular self-assembly is a feasible approach for nanopatterning and functionality, and selective adsorption at the molecular scale is crucial for both fundamental and practical applications. A controllable method for fabricating distorted Kagome-like networks by coupling molecular functional groups and substrate atoms was demonstrated. A chiral Kagome-like network was constructed using precursor molecules and scanning tunneling microscopy combined with density functional theory was used to examine the assembly mechanisms and cavity characteristics. The efficient template properties of Kagome-like networks for regulating the adsorption configuration of C60 were also explored.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Jun Wang, Si-Dong Zhang, Si-Jie Guo, Si-Qi Lu, Yan-Song Xu, Jin-Yang Li, An -Min Cao, Li-Jun Wan
Summary: A surface coating strategy using manganese oxide nanoshell to protect the 4.5 V LCO cathode has been developed, resulting in improved stability and cycling performance.
Article
Chemistry, Physical
Lili Fan, Xiaofei Wei, Xuting Li, Zhanning Liu, Mengfei Li, Shuo Liu, Zixi Kang, Fangna Dai, Xiaoqing Lu, Daofeng Sun
Summary: This study reports a phosphorus-doped catalyst FeNPC with penta-coordinated single atom sites for efficient oxygen reduction reaction (ORR). The electronic distribution and adsorption strength of Fe-N-4 can be adjusted, reducing the reaction free energy of the potential-limiting step. Electrochemical tests show that FeNPC exhibits remarkable ORR activity and stability in alkaline, neutral, and acidic media.
Article
Plant Sciences
Xianming Zhou, Haiyan Zhang, Zhaoqi Xie, Ying Liu, Pengfei Wang, Lihong Dai, Xiaohui Zhang, Zhaoyang Wang, Zhuanrong Wang, Lili Wan, Guangsheng Yang, Dengfeng Hong
Summary: This study revealed the core function of BnaC2.MYB28 in regulating seed glucosinolate content in rapeseed and proposed a promising strategy for manipulating it.
Article
Chemistry, Physical
Tiantian Feng, Qing Hao, Bing Sun, Dong Wang
Summary: Metal-covalent organic frameworks (MCOFs) with regular structures, adjustable pore channels, designable structures, and abundant tunable metal-catalytic active sites are promising candidates for advanced single-atom enzymes.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Ya-Chen Feng, Xiang Wang, Zhen-Yu Yi, Yu-Qi Wang, Hui-Juan Yan, Dong Wang
Summary: We used ECSTM to investigate the in-situ production of H2O2 in the CoTMPP-catalyzed ORR in neutral electrolytes. STM images showed the adsorption of 00H on active sites, which was found to be correlated with the pH value of the electrolyte. The thermodynamic parameters of the formation of CoTMPP-OOH- complex were extracted from the quantitative analysis of the STM images. The in-situ ECSTM experiments identified the formation and transformation process of H2O2 at the molecular scale, providing direct evidence for the rational design of high-efficiency electrocatalysts.
SCIENCE CHINA-CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Qing Hao, Xiao-Rui Ren, Yichen Chen, Chao Zhao, Jingyi Xu, Dong Wang, Hong Liu
Summary: Covalent organic frameworks are increasingly being used in the design of stimuli-responsive materials. In this study, a sweat-responsive covalent organic framework film was designed for material-based fingerprint liveness detection. The color change induced by sweat can intuitively distinguish living fingers from fake fingerprints. Additionally, the collection and analysis of sweat pore distribution can be achieved by simplifying the sample handling steps.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Yu-Qi Wang, Xiao-Han Dan, Zhen-Yu Yi, Xiang Wang, Ya-Chen Feng, Yue Feng, Dong Wang, Li-Jun Wan
Summary: This study investigates the O-2 adsorption and reduction on cobalt porphyrin (CoOEP) and phthalocyanine (CoPc) using in situ electrochemical scanning tunneling microscopy (ECSTM). Results show higher ORR activity of CoOEP compared to CoPc. Molecular-level imaging reveals that O-2 adsorbs mainly on Co-II sites and exhibits higher contrast in ECSTM images on CoOEP compared to CoPc. The dynamics of O-2 adsorption are quantitatively measured, with CoOEP exhibiting higher binding dynamics and lower Co-O dissociation barriers compared to CoPc.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Zhen-Feng Cai, Ting Chen, Dong Wang
Summary: Understanding the polymerization process at the molecular level is crucial for designing and synthesizing polymers with controllable properties. Scanning tunneling microscopy (STM) has emerged as a key technique to investigate polymerization on conductive solid surfaces. This Perspective focuses on the applications of STM in studying the mechanisms and processes of on-surface polymerization, including one-dimensional and two-dimensional reactions. The challenges and future perspectives in this field are also discussed.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Lu Wang, Cheng Lu, Huijuan Yan, Dong Wang
Summary: In this study, highly ordered monolayer COFs were successfully constructed on the surfaces of HOPG, hBN, and MoS2. HR-AFM imaging clearly reveals the substrate orientation effect in COFs/2D materials heterostructure. This work provides direct evidence for substrate effects in the on-surface synthesis of COFs and paves the way for further investigation into the intrinsic electronic properties of monolayer COFs and the development of multifunctional hybrid devices.
Review
Chemistry, Multidisciplinary
Qing Hao, You Tao, Xuesong Ding, Yajie Yang, Jie Feng, Rui-Lei Wang, Xue-Ming Chen, Guan-Le Chen, Xiaomeng Li, Huang OuYang, XunLiang Hu, Jia Tian, Bao-Hang Han, Guangshan Zhu, Wei Wang, Fan Zhang, Bien Tan, Zhan-Ting Li, Dong Wang, Li-Jun Wan
Summary: Porous organic polymers (POPs) are porous materials composed of light elements such as C, H, N, and O. Their benign characters, including large surface area, good physical and chemical stability, well-defined chemical composition, wide ranges of monomer selection, and strong designability, have made POPs one of the frontiers in materials research. In this review, we discussed the design and synthesis of various POP materials that mainly led by Chinese scientists, and sorted out their main applications in adsorption, separation, catalysis, and electrochemistry fields.
SCIENCE CHINA-CHEMISTRY
(2023)
Article
Chemistry, Physical
Xiang Wang, Zhen-Yu Yi, Yu-Qi Wang, Dong Wang, Li-Jun Wan
Summary: This study investigated the dynamic processes of methanol absorption and catalytic conversion on isolated single-atom Rh-N-4 sites using in situ electrochemical scanning tunneling microscopy. The results provided microscopic insights into the catalytic mechanism and reaction dynamics of methanol electrooxidation on Rh-N-4 sites, which is valuable for the rational design of high-performance catalysts.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Ruoning Li, Longzhu Zhang, Ting Chen, Dong Wang
Summary: Two-dimensional polymers (2DPs) are molecularly thin networks with covalently linked monomers in at least two directions in the molecular plane. They offer potential applications in catalysis, chemical sensing, and organic electronic devices due to their unique structural features and emergent physicochemical properties. On-surface synthesis is a method of fabricating 2DPs with atomic precision, and scanning probe techniques enable in situ characterization of their properties. This Perspective reviews recent developments in on-surface 2D polymerization, including design principles, synthetic reactions, and factors influencing synthesis, and discusses major challenges and possible solutions in the field.
Article
Chemistry, Physical
Yu-Qi Wang, Xiao-Han Dan, Zhen-Yu Yi, Xiang Wang, Ya-Chen Feng, Yue Feng, Dong Wang, Li-Jun Wan
Summary: The in situ electrochemical scanning tunneling microscopy (ECSTM) study of O2 adsorption and reduction on cobalt porphyrin (CoOEP) and phthalocyanine (CoPc) is reported. CoOEP exhibits higher ORR activity than CoPc according to electrochemical measurements. Self-assembled CoOEP and CoPc monolayers on Au(111) substrates are observed at molecular resolution by ECSTM. O2 adsorbs on CoII sites and has high contrast in ECSTM images for both CoOEP-O2 and CoPc-O2 complexes. The surface coverage of CoOEP-O2 is approximately 1.4 times higher than that of CoPc-O2. The dynamics of O2 adsorption, quantitatively measured by potential step experiments, indicate higher dynamics and lower barriers for Co-O dissociation on CoOEP compared to CoPc.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Lili Fan, Xiaofei Wei, Xuting Li, Zhanning Liu, Mengfei Li, Shuo Liu, Zixi Kang, Fangna Dai, Xiaoqing Lu, Daofeng Sun
Summary: This study reports a phosphorus-doped Fe-N-C catalyst with penta-coordinated single atom sites for efficient oxygen reduction. The catalyst exhibits remarkable ORR activity and stability in alkaline, neutral, and acidic media.
