Article
Chemistry, Physical
Meixue Ke, Tao Ma, Yi Wang, Xiaofang Zeng, Xinrui Miao, Xiaohong Cheng, Wenli Deng
Summary: In this study, the self-assembly behavior of a benzothiadiazole-based fluorophore was investigated in different solvents. The results showed that the self-assemblies exhibited solvent and concentration dependence, with different structures formed at different solvent interfaces. Additionally, the role of chain length in controlling the self-assembly patterns was also observed.
APPLIED SURFACE SCIENCE
(2022)
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
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
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, 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
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
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, Physical
Ruoning Li, Xue Zhang, Na Xue, Jie Li, Tianhao Wu, Zhen Xu, Yifan Wang, Na Li, Hao Tang, Shimin Hou, Yongfeng Wang
Summary: Metal-organic nanostructures on surfaces are structurally stable and have potential applications. Metal atoms can come from externally deposited metals or native surface atoms. Currently, these nanostructures mainly consist of Au or Cu, with fewer consisting of Ag. Further investigations are needed for accurate control of the desired nanostructures.
ACTA PHYSICO-CHIMICA SINICA
(2022)
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, 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
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, Multidisciplinary
Tianze Hu, Andrea Minoia, Gangamallaiah Velpula, Kanykei Ryskulova, Kristof Van Hecke, Roberto Lazzaroni, Kunal S. Mali, Richard Hoogenboom, Steven De Feyter
Summary: This study investigates the self-assembly behavior of DPP-C12 at the interface between HA and HOPG. The self-assembled monolayer formed by DPP-C12 is periodic in one direction but aperiodic in the orthogonal direction, resembling a 1D disordered racemic compound. Introducing Pd(II) ions transforms these 1D compounds into 2D racemic conglomerates. These findings provide insights into the regulation of two-dimensional chirality.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
David L. Wisman, Heechan Kim, Chungryeol Kim, Tobias W. Morris, Dongwhan Lee, Steven L. Tait
Summary: Intermolecular interactions play a crucial role in guiding self-assembly on surfaces. Precise control over these interactions by rational design of the molecule allows fine control over the self-assembly patterns. Hydrogen bonding significantly impacts two-dimensional molecular self-assembly and can be a potent strategy to modulate molecular 2D lattices on surfaces.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Physical
Haidong Liang, Yue Zheng, Leyi Loh, Zehua Hu, Qijie Liang, Cheng Han, Michel Bosman, Wei Chen, Andrew A. Bettiol
Summary: In this study, efficient n-type doping of 2D TMDs was achieved through ion beam irradiation, and the doping effect remained stable even after one year of exposure to ambient conditions. Furthermore, high-performance homogenous p-n junction diodes were fabricated using localized ion irradiation.
Article
Chemistry, Multidisciplinary
Qing Zhang, Enlong Li, Yongshuai Wang, Changsong Gao, Congyong Wang, Lin Li, Dechao Geng, Huipeng Chen, Wei Chen, Wenping Hu
Summary: Researchers have developed an ultralow-power vertical transistor based on transition-metal carbides/nitrides (MXene) and organic single crystal, which exhibits high J(ON) and J(ON)/J(OFF) ratio under ultralow working voltage and can simulate biological synapse functions with extremely low power consumption.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Meng Wang, Jie Chen, Zhangliu Tian, Wenrui Dai, Baihua Cui, Xinhang Cui, Dong Wang, Yukun Xiao, Xu Lian, Chonglai Jiang, Haotian Yang, Yihe Wang, Zejun Sun, Yishui Ding, Yi-Yang Sun, Jia Zhang, Wei Chen
Summary: Research reveals that by adjusting the surface structure of WO3 photocathodes, the formation of Li2O2 can be controlled and the photocatalytic reaction activity can be enhanced. Additionally, the (002) facet is found to have higher oxidation ability, resulting in an ultralow polarization overpotential and high discharge capacity over the (002) facet dominated WO3 photocathode.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Yumin Da, Zhangliu Tian, Rui Jiang, Yuan Liu, Xu Lian, Shibo Xi, Yi Shi, Yongping Wang, Haotian Lu, Baihua Cui, Jinfeng Zhang, Xiaopeng Han, Wei Chen, Wenbin Hu
Summary: This paper reports the synthesis of a PtNi-NC catalyst with high catalytic activity. Density functional theory calculations reveal that PtNi dual atoms generate a synergistic effect by modulating the local electronic structure and optimizing the charge distribution, contributing to optimized adsorption properties and enhanced electrocatalytic performance. This work provides a new avenue for the fabrication of dual-atom catalysts.
SCIENCE CHINA-MATERIALS
(2023)
Article
Chemistry, Physical
Julian Hausch, Nico Hofeditz, Jona Bredehoeft, Sebastian Hammer, Jens Pflaum, Katharina Broch, Marina Gerhard, Frank Schreiber
Summary: In the solid state, the coherent distribution of an electronic excitation, known as excited-state delocalization, plays a crucial role in photophysical processes like singlet fission. However, studying the influence of excited-state delocalization on singlet fission has been challenging due to the lack of a simple measurement method and the difficulty of tracking changes in the optically dark triplet-pair state, which is an important intermediate in singlet fission. By varying the growth conditions, researchers have demonstrated that emission from the triplet-pair state can be detected in films with low growth rates, indicating a higher excited-state delocalization.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Fangyuan Wang, Yuming Gu, Bailin Tian, Yuxia Sun, Lifeng Zheng, Shengtang Liu, Lingyu Tang, Xiao Han, Jing Ma, Mengning Ding
Summary: Replacing the oxygen evolution reaction (OER) with water-assisted oxidation of organic molecules is a promising approach for sustainable electrochemical biomass utilization. In this study, spinel sulfides were investigated for the electrooxidation of furfural and 5-hydroxymethylfurfural, showing superior catalytic performance compared to spinel oxides. The phase transition of spinel sulfides into amorphous bimetallic oxyhydroxides during electrochemical activation was found to be responsible for their excellent conversion rate, selectivity, faradaic efficiency, and stability. A volcano-like correlation was also established between their BEOR and OER activities.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Andre Martin Thomas Muthig, Ondrej Mrozek, Thomas Ferschke, Maximilian Roedel, Bjoern Ewald, Julia Kuhnt, Carsten Lenczyk, Jens Pflaum, Andreas Steffen
Summary: This article presents a molecular emitter that combines circularly polarized luminescence (CPL) with high radiative rate constants of the triplet exciton decay. The emitter shows efficient thermally activated delayed fluorescence (TADF) and high sensitivity to hydrogen bonding of the ligands. The mechanism behind this behavior is a thermal equilibrium between excited states and inter-ligand C-Hmiddotmiddotmiddot pi interactions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Kun Fan, Jian Li, Yongshan Xu, Cheng Fu, Yuan Chen, Chenyang Zhang, Guoqun Zhang, Jing Ma, Tianyou Zhai, Chengliang Wang
Summary: This study reports the synthesis of a three-dimensional coordination polymer with atomically precise structures. The material exhibits high conductivity and has potential applications as cathodes in sodium-ion batteries with high capacity, rate capability, and cyclability.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Multidisciplinary Sciences
Alexander Neef, Samuel Beaulieu, Sebastian Hammer, Shuo Dong, Julian Maklar, Tommaso Pincelli, R. Patrick Xian, Martin Wolf, Laurenz Rettig, Jens Pflaum, Ralph Ernstorfer
Summary: Singlet fission can double the number of excited charge carriers by transforming a singlet exciton into two triplet excitons, thereby boosting photovoltaic efficiency. The primary step of singlet fission, the creation of correlated triplet pairs, has multiple proposed mechanisms but lacks consensus. This study used time- and angle-resolved photoemission spectroscopy to observe the primary step of singlet fission in crystalline pentacene and found evidence of a charge-transfer mediated mechanism with hybridization of Frenkel and charge-transfer states in the lowest bright singlet exciton. The orbital and localization characteristics of the exciton wave functions were analyzed, providing insights into the mechanics of molecular systems and topological materials.
Article
Multidisciplinary Sciences
Jian Gou, Hua Bai, Xuanlin Zhang, Yu Li Huang, Sisheng Duan, A. Ariando, Shengyuan A. Yang, Lan Chen, Yunhao Lu, Andrew Thye Shen Wee
Summary: Conventional ferroelectric compounds require at least two constituent ions for polarization switching. However, in a black phosphorus-like bismuth layer, a single-element ferroelectric state is observed, with concurrent ordered charge transfer and regular atom distortion between sublattices. The Bi atoms in the black phosphorous-like Bi monolayer exhibit a weak and anisotropic sp orbital hybridization, leading to the inversion-symmetry-broken buckled structure and charge redistribution. The in-plane electric polarization is induced in the Bi monolayer, which is experimentally visualized through scanning probe microscopy.
Article
Chemistry, Multidisciplinary
Yumin Da, Zhangliu Tian, Rui Jiang, Ganwen Chen, Yuan Liu, Yukun Xiao, Jinfeng Zhang, Shibo Xi, Wei Chen, Xiaopeng Han, Wenbin Hu
Summary: In this research, a highly efficient electrocatalyst for the hydrogen evolution reaction was developed by using Pt single atoms supported on ultrathin NiO nanosheets. A self-gating phenomenon was induced in the nanosheets, resulting in the formation of active and inert regions. The active region allows for the HER process to occur, while the inert region accumulates charge carriers, leading to high conductivity and stability of the electrocatalyst.
Article
Chemistry, Multidisciplinary
Jia-Ge Jia, Chen-Chen Zhao, Yi-Fan Wei, Zhi-Min Zhai, Song-Song Bao, Allan J. Jacobson, Jing Ma, Li-Min Zheng
Summary: Controlling the formation and chirality of artificial systems, especially coordination polymers, is a challenging task. In this study, solvents were used as a tool to induce the formation of macroscopic helices with controllable chirality in chiral coordination polymers. The morphology of the self-assemblies could be manipulated by varying the cosolvent in water, resulting in twisted ribbons, needle-like crystals, nanofibers, and superhelices. Interestingly, the helicity of the superhelix could be controlled by using different propanol isomers in water.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Electrochemistry
Yuan Liu, Xu Lian, Xiaojiang Yu, Yuxiang Niu, Jinlin Yang, Yishui Ding, Wei Chen
Summary: This study investigates the interaction processes between alkali metal anodes (AMAs) and organic protective materials containing nitrogen groups. The results show that Li and Na preferentially interact with the outer nitrile groups of the protective material before interacting with the inner imine groups. Additionally, the sodiophilicity difference between the two nitrogen-containing groups is smaller compared to their lithiophilicity difference. These findings provide valuable insights for the development of more effective protective materials in the future.
BATTERIES & SUPERCAPS
(2023)
Review
Chemistry, Multidisciplinary
Yumin Da, Rui Jiang, Zhangliu Tian, Xiaopeng Han, Wei Chen, Wenbin Hu
Summary: The development of cost-effective and highly efficient electrocatalysts is crucial for achieving a low-carbon footprint in the industry. Single-atom alloys (SAAs) have unique electronic structures, well-defined active sites, and maximum atom utilization, making them promising replacements for traditional noble metal catalysts. SAAs can tailor the adsorption properties of reaction species to promote electrocatalytic behaviors.
Article
Chemistry, Multidisciplinary
Alfian Noviyanto, Ratih Amalia, Pramitha Yuniar Diah Maulida, Mudzakkir Dioktyanto, Bagas Haqi Arrosyid, Didik Aryanto, Lei Zhang, Andrew T. S. Wee, Arramel
Summary: In this study, manganese oxide nanoparticles were successfully synthesized using the hydrothermal method with different temperatures and NaOH concentrations. The results showed that temperature and NaOH concentration played important roles in determining the particle size, crystallinity, and oxygen vacancy occupancy of the manganese oxide nanoparticles.
