1
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Chen J, Peng Q, Peng X, Zhang H, Zeng H. Probing and Manipulating Noncovalent Interactions in Functional Polymeric Systems. Chem Rev 2022; 122:14594-14678. [PMID: 36054924 DOI: 10.1021/acs.chemrev.2c00215] [Citation(s) in RCA: 45] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Noncovalent interactions, which usually feature tunable strength, reversibility, and environmental adaptability, have been recognized as driving forces in a variety of biological and chemical processes, contributing to the recognition between molecules, the formation of molecule clusters, and the establishment of complex structures of macromolecules. The marriage of noncovalent interactions and conventional covalent polymers offers the systems novel mechanical, physicochemical, and biological properties, which are highly dependent on the binding mechanisms of the noncovalent interactions that can be illuminated via quantification. This review systematically discusses the nanomechanical characterization of typical noncovalent interactions in polymeric systems, mainly through direct force measurements at microscopic, nanoscopic, and molecular levels, which provide quantitative information (e.g., ranges, strengths, and dynamics) on the binding behaviors. The fundamental understandings of intermolecular and interfacial interactions are then correlated to the macroscopic performances of a series of noncovalently bonded polymers, whose functions (e.g., stimuli-responsiveness, self-healing capacity, universal adhesiveness) can be customized through the manipulation of the noncovalent interactions, providing insights into the rational design of advanced materials with applications in biomedical, energy, environmental, and other engineering fields.
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Affiliation(s)
- Jingsi Chen
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Qiongyao Peng
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Xuwen Peng
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Hao Zhang
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Hongbo Zeng
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
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2
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Yao RX, Shi JJ, Li KH, Liu X, Zhang HY, Wang M, Zhang WK. Exploring the Nanomechanical Properties of a Coordination-bond Based Supramolecular Polymer. CHINESE JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1007/s10118-022-2797-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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3
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Shi M, Mo W, Qi H, Ni Y, Wang R, Shen K, Zhang F, Jiang S, Zhang X, Chen L, Zhang Y, Deng X. Oxygen Ion Implantation Improving Cell Adhesion on Titanium Surfaces through Increased Attraction of Fibronectin PHSRN Domain. Adv Healthc Mater 2022; 11:e2101983. [PMID: 35104391 DOI: 10.1002/adhm.202101983] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 12/08/2021] [Indexed: 12/19/2022]
Abstract
Mechanistic understanding of fibronectin (FN) adsorption which determines cell adhesion on cell-implant interfaces is significant for improving the osteoconduction and soft-tissue healing of implants. Here, it is shown that the adsorption behavior of FN on the titanium oxide surface (TiO2 ) is highly relative to its Pro-His-Ser-Arg-Asn (PHSRN) peptide. FN lacking PHSRN fails to bind to surfaces, resulting in inhibited cell adhesion and spreading. Molecular dynamics simulation shows higher affinity and greater adsorption energy of PHSRN peptide with TiO2 surface due to the stronger hydrogen bonds formed by the serine and arginine residues with O ion of the substrate. Finally, by increasing O content in TiO2 surfaces through O ion-beam implantation, improving the cell adhesion, cell differentiation, and the subsequent biomineralization on titanium implant is realized. This study reveals the vital role of PHSRN in FN-mediated cell adhesion on implant surfaces, providing a promising new target for further tissue integration and implant success.
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Affiliation(s)
- Miusi Shi
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) and Key Laboratory of Oral Biomedicine Ministry of Education School and Hospital of Stomatology Wuhan University Wuhan 430079 P. R. China
| | - Wenting Mo
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) and Key Laboratory of Oral Biomedicine Ministry of Education School and Hospital of Stomatology Wuhan University Wuhan 430079 P. R. China
| | - Haoning Qi
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) and Key Laboratory of Oral Biomedicine Ministry of Education School and Hospital of Stomatology Wuhan University Wuhan 430079 P. R. China
| | - Yueqi Ni
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) and Key Laboratory of Oral Biomedicine Ministry of Education School and Hospital of Stomatology Wuhan University Wuhan 430079 P. R. China
| | - Rui Wang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) and Key Laboratory of Oral Biomedicine Ministry of Education School and Hospital of Stomatology Wuhan University Wuhan 430079 P. R. China
| | - Kailun Shen
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) and Key Laboratory of Oral Biomedicine Ministry of Education School and Hospital of Stomatology Wuhan University Wuhan 430079 P. R. China
| | - Fanyu Zhang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) and Key Laboratory of Oral Biomedicine Ministry of Education School and Hospital of Stomatology Wuhan University Wuhan 430079 P. R. China
| | - Shuting Jiang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) and Key Laboratory of Oral Biomedicine Ministry of Education School and Hospital of Stomatology Wuhan University Wuhan 430079 P. R. China
| | - Xuehui Zhang
- National Engineering Laboratory for Digital and Material Technology of Stomatology NMPA Key Laboratory for Dental Materials Beijing Laboratory of Biomedical Materials & Beijing Key Laboratory of Digital Stomatology Peking University School and Hospital of Stomatology Beijing 100081 P. R. China
- Department of Dental Materials & Dental Medical Devices Testing Center Peking University School and Hospital of Stomatology Beijing 100081 P. R. China
| | - Lili Chen
- Department of Stomatology Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430022 P. R. China
- School of Stomatology Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 P. R. China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration Wuhan 430022 P. R. China
| | - Yufeng Zhang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) and Key Laboratory of Oral Biomedicine Ministry of Education School and Hospital of Stomatology Wuhan University Wuhan 430079 P. R. China
| | - Xuliang Deng
- National Engineering Laboratory for Digital and Material Technology of Stomatology NMPA Key Laboratory for Dental Materials Beijing Laboratory of Biomedical Materials & Beijing Key Laboratory of Digital Stomatology Peking University School and Hospital of Stomatology Beijing 100081 P. R. China
- Department of Geriatric Dentistry Peking University School and Hospital of Stomatology Beijing 100081 P. R. China
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4
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Tang P, Lee HJ, Hurlbutt K, Huang PY, Narayanan S, Wang C, Gianolio D, Arrigo R, Chen J, Warner JH, Pasta M. Elucidating the Formation and Structural Evolution of Platinum Single-Site Catalysts for the Hydrogen Evolution Reaction. ACS Catal 2022; 12:3173-3180. [PMID: 35558899 PMCID: PMC9086987 DOI: 10.1021/acscatal.1c05958] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 02/04/2022] [Indexed: 12/12/2022]
Abstract
Platinum single-site catalysts (SSCs) are a promising technology for the production of hydrogen from clean energy sources. They have high activity and maximal platinum-atom utilization. However, the bonding environment of platinum during operation is poorly understood. In this work, we present a mechanistic study of platinum SSCs using operando, synchrotron-X-ray absorption spectroscopy. We synthesize an atomically dispersed platinum complex with aniline and chloride ligands onto graphene and characterize it with ex-situ electron microscopy, X-ray diffractometry, X-ray photoelectron spectroscopy, X-ray absorption near-edge structure spectroscopy (XANES), and extended X-ray absorption fine structure spectroscopy (EXAFS). Then, by operando EXAFS and XANES, we show that as a negatively biased potential is applied, the Pt-N bonds break first followed by the Pt-Cl bonds. The platinum is reduced from platinum(II) to metallic platinum(0) by the onset of the hydrogen-evolution reaction at 0 V. Furthermore, we observe an increase in Pt-Pt bonding, indicating the formation of platinum agglomerates. Together, these results indicate that while aniline is used to prepare platinum SSCs, the single-site complexes are decomposed and platinum agglomerates at operating potentials. This work is an important contribution to the understanding of the evolution of bonding environment in SSCs and provides some molecular insights into how platinum agglomeration causes the deactivation of SSCs over time.
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Affiliation(s)
- Peng Tang
- Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom
| | - Hyeon Jeong Lee
- Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom
| | - Kevin Hurlbutt
- Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom
| | - Po-Yuan Huang
- Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom
| | - Sudarshan Narayanan
- Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom
| | - Chenbo Wang
- Oxford Suzhou Centre for Advanced Research, 388 Ruoshui Road, Suzhou 215123, Jiangsu Province, P. R. China
| | - Diego Gianolio
- Diamond Light Source Limited, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, United Kingdom
| | - Rosa Arrigo
- School of Science, Engineering and Environment, University of Salford, Manchester M5 4WT, United Kingdom
| | - Jun Chen
- Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom
| | - Jamie H. Warner
- Materials Graduate Program, Texas Materials Institute, The University of Texas at Austin, 204 East Dean Keeton Street, Austin, Texas 78712, United States
- Walker Department of Mechanical Engineering, The University of Texas at Austin, 204 East Dean Keeton Street, Austin, Texas 78712, United States
| | - Mauro Pasta
- Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom
- Oxford Suzhou Centre for Advanced Research, 388 Ruoshui Road, Suzhou 215123, Jiangsu Province, P. R. China
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5
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Li S, Pang X, Zhao J, Zhang Q, Shan Y. Evaluating the single-molecule interactions between targeted peptides and the receptors on living cell membrane. NANOSCALE 2021; 13:17318-17324. [PMID: 34642724 DOI: 10.1039/d1nr05547j] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
As potential ligands, targeted peptides have become an important part in the construction of intelligent drug delivery systems (DDSs). The targeting interaction of peptides with receptors is a key point affecting the efficacy of targeted nano-drugs. Herein, three common peptides (HAIYPRH (T7), YHWYGYTPQNVI (GE11), and RGD) that have been widely used in cancer targeted therapy and tumor diagnostics, targeting the corresponding receptors (transferrin receptor (TfR), epidermal growth factor receptor (EGFR), and ανβ3 integrin receptor), were selected as examples to study the targeting interacton on living cell surface at the single-molecule level by using single-molecule force spectroscopy (SMFS) based on atomic force microscopy (AFM). The dissociation activation energy in the absence of an external force (ΔGβ,0) of T7-TfR, GE11-EGFR, and RGD-ανβ3 integrin is evaluated at single-molecule level. Among these three peptide-receptor pairs, the T7-TfR bond is the most stable with a smaller dissociation kinetic rate constant at zero force (Koff), larger kinetic on-rate constant (Kon), and shorter interaction time (τ). Furthermore, T7 can target TfR even more effectively on A549 cell membrane after treatment with drugs. Our methodology can also be applicable to the study of other ligand targeted DDSs.
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Affiliation(s)
- Siying Li
- School of Chemistry and Life Science, Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, China
- School of Chemical Engineering, Changchun University of Technology, Changchun 130012, China
| | - Xuelei Pang
- School of Chemistry and Life Science, Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, China
| | - Jing Zhao
- School of Chemistry and Life Science, Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, China
| | - Qingrong Zhang
- School of Chemistry and Life Science, Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, China
| | - Yuping Shan
- School of Chemistry and Life Science, Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, China
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6
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Nie J, Tian F, Zheng B, Wang Z, Zheng P. Exploration of Metal-Ligand Coordination Bonds in Proteins by Single-molecule Force Spectroscopy. CHEM LETT 2021. [DOI: 10.1246/cl.210307] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Jingyuan Nie
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, P. R. China
| | - Fang Tian
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, P. R. China
| | - Bin Zheng
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, P. R. China
| | - Ziyi Wang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, P. R. China
| | - Peng Zheng
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, P. R. China
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7
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Abstract
In the scanning probe microscope system, the weak signal detection of cantilever vibration is one of the important factors affecting the sensor sensitivity. In our current work, we present a novel design concept for an atomic force microscope (AFM) combined with optomechanics with an ultra-high quality factor and a low thermal noise. The detection system consists of a fixed mirror placed on the cantilever of the AFM and pump-probe beams that is equivalent to a Fabry-Perot cavity. We realize that the AFM combined with an optical cavity can achieve ultra-sensitive detection of force gradients of 10-12 N m-1 in the case of high-vacuum and low effective temperature of 1 mK, which may open up new avenues for super-high resolution imaging and super-high precision force spectroscopy.
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Affiliation(s)
- Fei He
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, People's Republic of China
| | - Jian Liu
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, People's Republic of China
| | - Ka-Di Zhu
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, People's Republic of China
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8
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Hao X, Zhang J, Yang Y, Wang H, Chi Q. Single‐Molecule Interactions between Heme Proteins and Carboxylic Groups in Various Chemical Environments. ChemElectroChem 2020. [DOI: 10.1002/celc.202001234] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xian Hao
- School of Public Health & Jiangxi Provincial Key Laboratory of Preventive Medicine Nanchang University, Nanchang Jiangxi 330006 China
| | - Jingdong Zhang
- Department of Chemistry Technical University of Denmark 2800 Kgs. Lyngby Denmark
| | - Yifei Yang
- School of Public Health & Jiangxi Provincial Key Laboratory of Preventive Medicine Nanchang University, Nanchang Jiangxi 330006 China
| | - Hongda Wang
- State Key Laboratory of Electroanalytical Chemistry Research Center of Biomembranomics Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun Jilin 130022 China
| | - Qijin Chi
- Department of Chemistry Technical University of Denmark 2800 Kgs. Lyngby Denmark
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9
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Zeng D, Salvatore P, Karlsen KK, Zhang J, Wengel J, Ulstrup J. Reprint of "Electrochemical intercalator binding to single- and double-strand DNA- and LNA-based molecules on Au(111)-electrode surfaces". J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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10
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Muddassir M. Blue light-induced low mechanical stability of ruthenium-based coordination bonds: an AFM-based single-molecule force spectroscopy study. RSC Adv 2020; 10:40543-40551. [PMID: 35520844 PMCID: PMC9057637 DOI: 10.1039/d0ra07274e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 10/25/2020] [Indexed: 12/22/2022] Open
Abstract
A HA–RuII complex was conjugated to a hyaluronan polymer through amide bonds. In AFM experiments using the “multi-fishhook” approach, the cantilever tip made contact with the polymeric molecule, resulting in stretching, indicated by sawtooth-like force-extension curves.
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Affiliation(s)
- Mohd. Muddassir
- Department of Chemistry
- College of Science
- King Saud University
- Riyadh 11451
- Saudi Arabia
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11
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Li B, Zhao X, Sun Z, Xue S, Cai G, Han SH. Rectification Behavior on Polyelectrolyte-Modified Flexible ITO Electrode via Ionic Charge-Selective Electron Transfer. ACS APPLIED MATERIALS & INTERFACES 2019; 11:41799-41803. [PMID: 31613587 DOI: 10.1021/acsami.9b13014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
New types of diodes, such as molecular and ionic diodes, have drawn considerable attention because of their advantages from the viewpoint of potential applications such as the downscaling of electronic devices, ionic circuits, and biological systems. Researchers are motivated to develop a simple, scalable, and promising system that can overcome the existing limitations because this can enable their application in various devices. This study proposes a system that not only integrates the advantages of ionic and single-molecule diodes but also avoids their disadvantages, denoting the rectification behavior due to ionic charge-selective electron transfer between two redox species, i.e., Fe(CN)63- and Ru(NH3)63+, on the polyelectrolyte multilayer (PEM)-modified flexible indium tin oxide (ITO) electrodes. Flexible current rectification devices were easily prepared by sandwiching an electrolytic solution of ionic redox species using bare and PEM-modified plastic ITO electrodes. An ionic bilayer was initially formed via Coulombic interactions on a PEM-modified charge-selective ITO surface. The ionic bilayer was analogous to a conventional single-molecule diode's monolayer with consecutive molecular orbitals of two ionic redox species. Furthermore, the rectification ratio (RR) was increased from ∼6 to ∼10 using a conducting polymer to construct PEMs.
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Affiliation(s)
- Bingchen Li
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Department of Applied Chemistry , Tianjin University of Technology , No. 391 Binshui Xidao , Xiqing District Tianjin 300384 , P. R. China
| | - Xuxian Zhao
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Department of Applied Chemistry , Tianjin University of Technology , No. 391 Binshui Xidao , Xiqing District Tianjin 300384 , P. R. China
| | - Zhe Sun
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Department of Applied Chemistry , Tianjin University of Technology , No. 391 Binshui Xidao , Xiqing District Tianjin 300384 , P. R. China
| | - Song Xue
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Department of Applied Chemistry , Tianjin University of Technology , No. 391 Binshui Xidao , Xiqing District Tianjin 300384 , P. R. China
| | - Gangri Cai
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Department of Applied Chemistry , Tianjin University of Technology , No. 391 Binshui Xidao , Xiqing District Tianjin 300384 , P. R. China
| | - Sung-Hwan Han
- Department of Chemistry , Hanyang University , 222, Wangsimni-ro, Seongdong-gu , Seoul 04763 , Republic of Korea
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12
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Du B, Li J, Fang W, Liu J. Comparison of long-term stability under natural ageing between cement solidified and chelator-stabilised MSWI fly ash. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 250:68-78. [PMID: 30981937 DOI: 10.1016/j.envpol.2019.03.124] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 03/28/2019] [Accepted: 03/29/2019] [Indexed: 06/09/2023]
Abstract
Cement-solidification and chelator-stabilisation of municipal solid waste incineration fly ash (MSWI-FA) are two main treatment techniques to immobilise heavy metals. Differences in the long-term stabilities of those two methods of heavy-metal immobilisation were explored to aid in determining the better MSWI-FA treatment. However, few comparative studies have been conducted on 6-year-old cement-solidified FA (Ce-6-FA) and chelator-stabilised FA (Ch-6-FA). In this study, we compared the physicochemical and heavy metal leaching characteristics of Ce-6-FA and Ch-6-FA. The chemical speciation of heavy metals was modelled using geochemical software to assess long-term stability. The results showed weaker long-term stability in Pb immobilisation under the chelating system. The leaching concentrations of target heavy metals, acetic acid leaching tests, acid neutralising capacity, and pH-dependent leaching results indicated that Ce-6-FA had higher long-term stability than Ch-6-FA. A column experiment indicated that the cumulative release rates of Pb in Ce-6-FA and Ch-6-FA were 2.49% and 4.72%, respectively. The phase-controlled leaching of Pb in Ce-6-FA mainly occurred through Pb2(OH)3Cl and chloropyromorphite (Pb5(PO4)3Cl), whereas that in Ch-6-FA mainly occurred through Pb5(PO4)3Cl. The decomposition of heavy metal chelates in Ch-6-FA and salt generation in this process led to the release of Pb via the inorganic complex.
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Affiliation(s)
- Bing Du
- Key Laboratory for Solid Waste Management and Environment Safety, School of Environment, Tsinghua University, Beijing, PR China
| | - Jiantao Li
- Key Laboratory for Solid Waste Management and Environment Safety, School of Environment, Tsinghua University, Beijing, PR China
| | - Wen Fang
- Key Laboratory for Solid Waste Management and Environment Safety, School of Environment, Tsinghua University, Beijing, PR China
| | - Jianguo Liu
- Key Laboratory for Solid Waste Management and Environment Safety, School of Environment, Tsinghua University, Beijing, PR China.
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13
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Xiang W, Li Z, Xu C, Li J, Zhang W, Xu H. Quantifying the Bonding Strength of Gold‐Chalcogen Bonds in Block Copolymer Systems. Chem Asian J 2019; 14:1481-1486. [DOI: 10.1002/asia.201900332] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Indexed: 01/21/2023]
Affiliation(s)
- Wentian Xiang
- Key Lab of Organic Optoelectronics & Molecular EngineeringDepartment of ChemistryTsinghua University Beijing 100084 China
| | - Zhandong Li
- State Key Laboratory of Supramolecular Structure and MaterialsCollege of ChemistryJilin University 2699 Qianjin Street Changchun 130012 China
| | - Cong‐Qiao Xu
- Key Lab of Organic Optoelectronics & Molecular EngineeringDepartment of ChemistryTsinghua University Beijing 100084 China
| | - Jun Li
- Key Lab of Organic Optoelectronics & Molecular EngineeringDepartment of ChemistryTsinghua University Beijing 100084 China
| | - Wenke Zhang
- State Key Laboratory of Supramolecular Structure and MaterialsCollege of ChemistryJilin University 2699 Qianjin Street Changchun 130012 China
| | - Huaping Xu
- Key Lab of Organic Optoelectronics & Molecular EngineeringDepartment of ChemistryTsinghua University Beijing 100084 China
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14
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Eklöf-Österberg J, Gschneidtner T, Tebikachew B, Lara-Avila S, Moth-Poulsen K. Parallel Fabrication of Self-Assembled Nanogaps for Molecular Electronic Devices. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1803471. [PMID: 30358919 DOI: 10.1002/smll.201803471] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 10/04/2018] [Indexed: 06/08/2023]
Abstract
Single molecule electronics might be a way to add additional function to nanoscale devices and continue miniaturization beyond current state of the art. Here, a combined top-down and bottom-up strategy is employed to assemble single molecules onto prefabricated electrodes. Protodevices, which are self-assembled nanogaps composed by two gold nanoparticles linked by a single or a few molecules, are guided onto top-down prefabricated nanosized nickel electrodes with sandwiched palladium layers. It is shown that an optimized geometry of multilayered metallic (top-down) electrodes facilitates the assembly of (bottom-up) nanostructures by surface charge interactions. Moreover, such assembly process results in an electrode-nanoparticle interface free from linking molecules that enable electrical measurements to probe electron transport properties of the nanoparticle-molecule-nanoparticle protodevices.
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Affiliation(s)
- Johnas Eklöf-Österberg
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, 412 96, Sweden
| | - Tina Gschneidtner
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, 412 96, Sweden
| | - Behabitu Tebikachew
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, 412 96, Sweden
| | - Samuel Lara-Avila
- Department of Microtechnology and Nanoscience, Chalmers University of Technology, Gothenburg, 412 96, Sweden
- National Physical Laboratory, Teddington, TW11 0LW, UK
| | - Kasper Moth-Poulsen
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, 412 96, Sweden
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15
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Li H, Zheng P. Single molecule force spectroscopy: a new tool for bioinorganic chemistry. Curr Opin Chem Biol 2018; 43:58-67. [DOI: 10.1016/j.cbpa.2017.11.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 11/22/2017] [Accepted: 11/26/2017] [Indexed: 01/14/2023]
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16
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Li Y, Haworth NL, Xiang L, Ciampi S, Coote ML, Tao N. Mechanical Stretching-Induced Electron-Transfer Reactions and Conductance Switching in Single Molecules. J Am Chem Soc 2017; 139:14699-14706. [DOI: 10.1021/jacs.7b08239] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
| | - Naomi L. Haworth
- ARC
Centre of Excellence for Electromaterials Science, Research School
of Chemistry, Australian National University, Canberra, Australian Capital
Territory 2601, Australia
| | | | - Simone Ciampi
- Department
of Chemistry, Curtin University, Bentley, Western Australia 6102, Australia
| | - Michelle L. Coote
- ARC
Centre of Excellence for Electromaterials Science, Research School
of Chemistry, Australian National University, Canberra, Australian Capital
Territory 2601, Australia
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17
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Li Y, Wen J, Qin M, Cao Y, Ma H, Wang W. Single-Molecule Mechanics of Catechol-Iron Coordination Bonds. ACS Biomater Sci Eng 2017; 3:979-989. [DOI: 10.1021/acsbiomaterials.7b00186] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Yiran Li
- Collaborative Innovation Center
of Advanced Microstructures, National
Laboratory of Solid State Microstructure, Department of Physics, and §Key Laboratory
of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering,
Institute of Theoretical and Computational Chemistry, Nanjing University, Nanjing 210093, P. R. China
| | - Jing Wen
- Collaborative Innovation Center
of Advanced Microstructures, National
Laboratory of Solid State Microstructure, Department of Physics, and §Key Laboratory
of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering,
Institute of Theoretical and Computational Chemistry, Nanjing University, Nanjing 210093, P. R. China
| | - Meng Qin
- Collaborative Innovation Center
of Advanced Microstructures, National
Laboratory of Solid State Microstructure, Department of Physics, and §Key Laboratory
of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering,
Institute of Theoretical and Computational Chemistry, Nanjing University, Nanjing 210093, P. R. China
| | - Yi Cao
- Collaborative Innovation Center
of Advanced Microstructures, National
Laboratory of Solid State Microstructure, Department of Physics, and §Key Laboratory
of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering,
Institute of Theoretical and Computational Chemistry, Nanjing University, Nanjing 210093, P. R. China
| | - Haibo Ma
- Collaborative Innovation Center
of Advanced Microstructures, National
Laboratory of Solid State Microstructure, Department of Physics, and §Key Laboratory
of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering,
Institute of Theoretical and Computational Chemistry, Nanjing University, Nanjing 210093, P. R. China
| | - Wei Wang
- Collaborative Innovation Center
of Advanced Microstructures, National
Laboratory of Solid State Microstructure, Department of Physics, and §Key Laboratory
of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering,
Institute of Theoretical and Computational Chemistry, Nanjing University, Nanjing 210093, P. R. China
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18
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Kim Y, Kim W, Park JW. Principles and Applications of Force Spectroscopy Using Atomic Force Microscopy. B KOREAN CHEM SOC 2016. [DOI: 10.1002/bkcs.11022] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Youngkyu Kim
- Department of Chemistry; Pohang University of Science and Technology; Pohang 37673 Korea
| | - Woong Kim
- Department of Chemistry; Pohang University of Science and Technology; Pohang 37673 Korea
| | - Joon Won Park
- Department of Chemistry; Pohang University of Science and Technology; Pohang 37673 Korea
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19
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Morari C, Buimaga-Iarinca L, Rungger I, Sanvito S, Melinte S, Rignanese GM. Charge and spin transport in single and packed ruthenium-terpyridine molecular devices: Insight from first-principles calculations. Sci Rep 2016; 6:31856. [PMID: 27550064 PMCID: PMC4994010 DOI: 10.1038/srep31856] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Accepted: 07/28/2016] [Indexed: 01/17/2023] Open
Abstract
Using first-principles calculations, we study the electronic and transport properties of rutheniumterpyridine molecules sandwiched between two Au(111) electrodes. We analyse both single and packed molecular devices, more amenable to scaling and realistic integration approaches. The devices display all together robust negative differential resistance features at low bias voltages. Remarkably, the electrical control of the spin transport in the studied systems implies a subtle distribution of the magnetisation density within the biased devices and highlights the key role of the Au(111) electrical contacts.
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Affiliation(s)
- C. Morari
- National Institute for Research and Development of Isotopic and Molecular Technologies (NIRDIMT), 65-103 Donath, Ro-400293, Cluj-Napoca, Romania
| | - L. Buimaga-Iarinca
- National Institute for Research and Development of Isotopic and Molecular Technologies (NIRDIMT), 65-103 Donath, Ro-400293, Cluj-Napoca, Romania
| | - I. Rungger
- School of Physics and CRANN, Trinity College, Dublin 2, Ireland
- National Physical Laboratory, Teddington, TW11 0LW, United Kingdom
| | - S. Sanvito
- School of Physics and CRANN, Trinity College, Dublin 2, Ireland
| | - S. Melinte
- ICTM Institute, Université catholique de Louvain, 1348 Louvain-la-Neuve, Belgium
| | - G.-M. Rignanese
- IMCN Institute, Université catholique de Louvain, 1348 Louvain-la-Neuve, Belgium
- European Theoretical Spectroscopy Facility (ETSF), 1348 Louvain-la-Neuve, Belgium
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20
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Mathwig K, Chi Q, Lemay SG, Rassaei L. Handling and Sensing of Single Enzyme Molecules: From Fluorescence Detection towards Nanoscale Electrical Measurements. Chemphyschem 2015; 17:452-7. [DOI: 10.1002/cphc.201500686] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Klaus Mathwig
- Pharmaceutical Analysis; Groningen Research Institute of Pharmacy; University of Groningen; P.O. Box 196 9700 AD Groningen The Netherlands
| | - Qijin Chi
- Department of Chemistry; Technical University of Denmark; 2800 Kongens Lyngby Denmark
| | - Serge G. Lemay
- MESA+ Institute for Nanotechnology; University of Twente; P.O. Box 217 7500 AE Enschede The Netherlands
| | - Liza Rassaei
- Laboratory of Organic Materials and Interfaces; Department of Chemical Engineering; Delft University of Technology; Julianalaan 136 2628 BL Delft The Netherlands
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21
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de la Llave E, Herrera SE, Adam C, Méndez De Leo LP, Calvo EJ, Williams FJ. Molecular and electronic structure of osmium complexes confined to Au(111) surfaces using a self-assembled molecular bridge. J Chem Phys 2015; 143:184703. [PMID: 26567676 DOI: 10.1063/1.4935364] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
The molecular and electronic structure of Os(II) complexes covalently bonded to self-assembled monolayers (SAMs) on Au(111) surfaces was studied by means of polarization modulation infrared reflection absorption spectroscopy, photoelectron spectroscopies, scanning tunneling microscopy, scanning tunneling spectroscopy, and density functional theory calculations. Attachment of the Os complex to the SAM proceeds via an amide covalent bond with the SAM alkyl chain 40° tilted with respect to the surface normal and a total thickness of 26 Å. The highest occupied molecular orbital of the Os complex is mainly based on the Os(II) center located 2.2 eV below the Fermi edge and the LUMO molecular orbital is mainly based on the bipyridine ligands located 1.5 eV above the Fermi edge.
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Affiliation(s)
- Ezequiel de la Llave
- INQUIMAE-CONICET, Departamento de Química Inorgánica, Analítica y Química-Física, Facultad Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, Buenos Aires C1428EHA, Argentina
| | - Santiago E Herrera
- INQUIMAE-CONICET, Departamento de Química Inorgánica, Analítica y Química-Física, Facultad Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, Buenos Aires C1428EHA, Argentina
| | - Catherine Adam
- INQUIMAE-CONICET, Departamento de Química Inorgánica, Analítica y Química-Física, Facultad Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, Buenos Aires C1428EHA, Argentina
| | - Lucila P Méndez De Leo
- INQUIMAE-CONICET, Departamento de Química Inorgánica, Analítica y Química-Física, Facultad Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, Buenos Aires C1428EHA, Argentina
| | - Ernesto J Calvo
- INQUIMAE-CONICET, Departamento de Química Inorgánica, Analítica y Química-Física, Facultad Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, Buenos Aires C1428EHA, Argentina
| | - Federico J Williams
- INQUIMAE-CONICET, Departamento de Química Inorgánica, Analítica y Química-Física, Facultad Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, Buenos Aires C1428EHA, Argentina
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22
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Bardakçı T, Altun A, Golcuk K, Kumru M. Synthesis, structural, spectral (FT-IR, FT-Ra, and UV–Vis), thermal, and density functional studies on p-methylaniline complexes of Mn(II), Co(II), and Ni(II) bromides. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.07.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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23
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Affiliation(s)
- Sundus Erbas-Cakmak
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - David A. Leigh
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Charlie T. McTernan
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Alina
L. Nussbaumer
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
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24
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Joshi K, Krishnamurty S, Singh I, Selvaraj K. A DFT based assay for tailor-made terpyridine ligand–metal complexation properties. MOLECULAR SIMULATION 2015. [DOI: 10.1080/08927022.2015.1067368] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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25
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Guo C, Fan X, Qiu H, Xiao W, Wang L, Xu B. High-resolution probing heparan sulfate-antithrombin interaction on a single endothelial cell surface: single-molecule AFM studies. Phys Chem Chem Phys 2015; 17:13301-6. [PMID: 25921251 PMCID: PMC4431915 DOI: 10.1039/c5cp01305d] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Heparan sulfate (HS) plays diverse functions in multiple biological processes by interacting with a wide range of important protein ligands, such as the key anticoagulant factor, antithrombin (AT). The specific interaction of HS with a protein ligand is determined mainly by the sulfation patterns on the HS chain. Here, we reported the probing single-molecule interaction of AT and HS (both wild type and mutated) expressed on the endothelial cell surface under near-physiological conditions by atomic force microscopy (AFM). Functional AFM imaging revealed the uneven distribution of HS on the endothelial cell surface though they are highly expressed. Force spectroscopy measurements using an AT-functionalized AFM tip revealed that AT interacts with endothelial HS on the cell surface through multiple binding sites. The interaction essentially requires HS to be N-, 2-O- and/or 6-O-sulfated. This work provides a new tool to probe the HS-protein ligand interaction at a single-molecular level on the cell surface to elucidate the functional roles of HS.
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Affiliation(s)
- Cunlan Guo
- Single Molecule Study Laboratory, College of Engineering and Nanoscale Science and Engineering Center, University of Georgia, Athens, GA, USA.
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26
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Zhu N, Ulstrup J, Chi Q. Surface self-assembled hybrid nanocomposites with electroactive nanoparticles and enzymes confined in a polymer matrix for controlled electrocatalysis. J Mater Chem B 2015; 3:8133-8142. [DOI: 10.1039/c5tb01672j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Three-dimensional interfacial nanocomposites consisting of a polymer matrix, electroactive nanoparticles and enzymes are synthesized on electrode surfaces via surface self-assembly chemistry. The nanocomposites show promising observations for achieving fast electron transfer and efficient electrocatalysis.
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Affiliation(s)
- Nan Zhu
- Department of Chemistry
- Technical University of Denmark
- DK-2800 Kongens Lyngby
- Denmark
| | - Jens Ulstrup
- Department of Chemistry
- Technical University of Denmark
- DK-2800 Kongens Lyngby
- Denmark
| | - Qijin Chi
- Department of Chemistry
- Technical University of Denmark
- DK-2800 Kongens Lyngby
- Denmark
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27
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Li D, Kong N, Liu J, Wang H, Barrow CJ, Zhang S, Yang W. Real-time electrochemical monitoring of covalent bond formation in solution via nanoparticle–electrode collisions. Chem Commun (Camb) 2015; 51:16349-52. [DOI: 10.1039/c5cc06228d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
We describe an alternative electrochemical technique to monitor covalent bond formation in real-time using nanoparticle–electrode collisions.
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Affiliation(s)
- Da Li
- Center for Chemistry and Biotechnology
- Deakin University
- Australia
| | - Na Kong
- Center for Chemistry and Biotechnology
- Deakin University
- Australia
| | - Jingquan Liu
- College of Chemical Science and Engineering
- Qingdao University
- Qingdao 266071
- China
| | - Hongbin Wang
- Shandong Province Key Laboratory of Detection Technology for Tumor Makers
- Linyi University
- Linyi 276005
- China
| | - Colin J. Barrow
- Center for Chemistry and Biotechnology
- Deakin University
- Australia
| | - Shusheng Zhang
- Shandong Province Key Laboratory of Detection Technology for Tumor Makers
- Linyi University
- Linyi 276005
- China
| | - Wenrong Yang
- Center for Chemistry and Biotechnology
- Deakin University
- Australia
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28
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Pan Y, Wang F, Liu Y, Jiang J, Yang YG, Wang H. Studying the mechanism of CD47-SIRPα interactions on red blood cells by single molecule force spectroscopy. NANOSCALE 2014; 6:9951-9954. [PMID: 25058630 DOI: 10.1039/c4nr02889a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The interaction forces and binding kinetics between SIRPα and CD47 were investigated by single-molecule force spectroscopy (SMFS) on both fresh and experimentally aged human red blood cells (hRBCs). We found that CD47 experienced a conformation change after oxidation, which influenced the interaction force and the position of the energy barrier between SIRPα and CD47. Our results are significant for understanding the mechanism of phagocytosis of red blood cells at the single molecule level.
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Affiliation(s)
- Yangang Pan
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P.R. China.
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29
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Kolivoška V, Mohos M, Pobelov IV, Rohrbach S, Yoshida K, Hong WJ, Fu YC, Moreno-García P, Mészáros G, Broekmann P, Hromadová M, Sokolová R, Valášek M, Wandlowski T. Electrochemical control of a non-covalent binding between ferrocene and beta-cyclodextrin. Chem Commun (Camb) 2014; 50:11757-9. [DOI: 10.1039/c4cc04102j] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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30
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Tian Y, Cai M, Xu H, Ding B, Hao X, Jiang J, Sun Y, Wang H. Atomic force microscopy of asymmetric membranes from turtle erythrocytes. Mol Cells 2014; 37:592-7. [PMID: 25134535 PMCID: PMC4145370 DOI: 10.14348/molcells.2014.0115] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 06/13/2014] [Accepted: 07/07/2014] [Indexed: 12/20/2022] Open
Abstract
The cell membrane provides critical cellular functions that rely on its elaborate structure and organization. The structure of turtle membranes is an important part of an ongoing study of erythrocyte membranes. Using a combination of atomic force microscopy and single-molecule force spectroscopy, we characterized the turtle erythrocyte membrane structure with molecular resolution in a quasi-native state. High-resolution images both leaflets of turtle erythrocyte membranes revealed a smooth outer membrane leaflet and a protein covered inner membrane leaflet. This asymmetry was verified by single-molecule force spectroscopy, which detects numerous exposed amino groups of membrane proteins in the inner membrane leaflet but much fewer in the outer leaflet. The asymmetric membrane structure of turtle erythrocytes is consistent with the semi-mosaic model of human, chicken and fish erythrocyte membrane structure, making the semi-mosaic model more widely applicable. From the perspective of biological evolution, this result may support the universality of the semi-mosaic model.
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Affiliation(s)
- Yongmei Tian
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022,
P.R. China
- University of Chinese Academy of Sciences, Beijing 100049,
P.R. China
| | - Mingjun Cai
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022,
P.R. China
| | - Haijiao Xu
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022,
P.R. China
| | - Bohua Ding
- School of physics, Northeast Normal University, Changchun, Jilin 130024,
P.R. China
| | - Xian Hao
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022,
P.R. China
| | - Junguang Jiang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022,
P.R. China
| | - Yingchun Sun
- School of physics, Northeast Normal University, Changchun, Jilin 130024,
P.R. China
| | - Hongda Wang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022,
P.R. China
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31
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Quantifying thiol-gold interactions towards the efficient strength control. Nat Commun 2014; 5:4348. [PMID: 25000336 DOI: 10.1038/ncomms5348] [Citation(s) in RCA: 390] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Accepted: 06/09/2014] [Indexed: 12/25/2022] Open
Abstract
The strength of the thiol-gold interactions provides the basis to fabricate robust self-assembled monolayers for diverse applications. Investigation on the stability of thiol-gold interactions has thus become a hot topic. Here we use atomic force microscopy to quantify the stability of individual thiol-gold contacts formed both by isolated single thiols and in self-assembled monolayers on gold surface. Our results show that the oxidized gold surface can enhance greatly the stability of gold-thiol contacts. In addition, the shift of binding modes from a coordinate bond to a covalent bond with the change in environmental pH and interaction time has been observed experimentally. Furthermore, isolated thiol-gold contact is found to be more stable than that in self-assembled monolayers. Our findings revealed mechanisms to control the strength of thiol-gold contacts and will help guide the design of thiol-gold contacts for a variety of practical applications.
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32
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Zhao W, Tian Y, Cai M, Wang F, Wu J, Gao J, Liu S, Jiang J, Jiang S, Wang H. Studying the nucleated mammalian cell membrane by single molecule approaches. PLoS One 2014; 9:e91595. [PMID: 24806512 PMCID: PMC4012985 DOI: 10.1371/journal.pone.0091595] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2013] [Accepted: 02/12/2014] [Indexed: 01/24/2023] Open
Abstract
The cell membrane plays a key role in compartmentalization, nutrient transportation and signal transduction, while the pattern of protein distribution at both cytoplasmic and ectoplasmic sides of the cell membrane remains elusive. Using a combination of single-molecule techniques, including atomic force microscopy (AFM), single molecule force spectroscopy (SMFS) and stochastic optical reconstruction microscopy (STORM), to study the structure of nucleated cell membranes, we found that (1) proteins at the ectoplasmic side of the cell membrane form a dense protein layer (4 nm) on top of a lipid bilayer; (2) proteins aggregate to form islands evenly dispersed at the cytoplasmic side of the cell membrane with a height of about 10–12 nm; (3) cholesterol-enriched domains exist within the cell membrane; (4) carbohydrates stay in microdomains at the ectoplasmic side; and (5) exposed amino groups are asymmetrically distributed on both sides. Based on these observations, we proposed a Protein Layer-Lipid-Protein Island (PLLPI) model, to provide a better understanding of cell membrane structure, membrane trafficking and viral fusion mechanisms.
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Affiliation(s)
- Weidong Zhao
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yongmei Tian
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Mingjun Cai
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, China
| | - Feng Wang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, China
| | - Jiazhen Wu
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Jing Gao
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Shuheng Liu
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, China
| | - Junguang Jiang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, China
| | - Shibo Jiang
- Key Laboratory of Medical Molecular Virology of Ministries of Education and Health, Shanghai Medical College, Fudan University, Shanghai, China
- Lindsley F. Kimball Research Institute, New York Blood Center, New York, New York, United States of America
- * E-mail: (HW); (SJ)
| | - Hongda Wang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, China
- University of Chinese Academy of Sciences, Beijing, China
- * E-mail: (HW); (SJ)
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33
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Wagner C, Fournier N, Tautz FS, Temirov R. The role of surface corrugation and tip oscillation in single-molecule manipulation with a non-contact atomic force microscope. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2014; 5:202-9. [PMID: 24605287 PMCID: PMC3943512 DOI: 10.3762/bjnano.5.22] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Accepted: 01/31/2014] [Indexed: 05/05/2023]
Abstract
Scanning probe microscopy (SPM) plays an important role in the investigation of molecular adsorption. The possibility to probe the molecule-surface interaction while tuning its strength through SPM tip-induced single-molecule manipulation has particularly promising potential to yield new insights. We recently reported experiments, in which 3,4,9,10-perylene-tetracarboxylic-dianhydride (PTCDA) molecules were lifted with a qPlus-sensor and analyzed these experiments by using force-field simulations. Irrespective of the good agreement between the experiment and those simulations, systematic inconsistencies remained that we attribute to effects omitted from the initial model. Here we develop a more realistic simulation of single-molecule manipulation by non-contact AFM that includes the atomic surface corrugation, the tip elasticity, and the tip oscillation amplitude. In short, we simulate a full tip oscillation cycle at each step of the manipulation process and calculate the frequency shift by solving the equation of motion of the tip. The new model correctly reproduces previously unexplained key features of the experiment, and facilitates a better understanding of the mechanics of single-molecular junctions. Our simulations reveal that the surface corrugation adds a positive frequency shift to the measurement that generates an apparent repulsive force. Furthermore, we demonstrate that the scatter observed in the experimental data points is related to the sliding of the molecule across the surface.
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Affiliation(s)
- Christian Wagner
- Leiden Institute of Physics, Universiteit Leiden, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands
- Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
- Jülich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology, 52425 Jülich, Germany
| | - Norman Fournier
- Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
- Jülich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology, 52425 Jülich, Germany
| | - F Stefan Tautz
- Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
- Jülich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology, 52425 Jülich, Germany
| | - Ruslan Temirov
- Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
- Jülich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology, 52425 Jülich, Germany
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34
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Sun L, Diaz-Fernandez YA, Gschneidtner TA, Westerlund F, Lara-Avila S, Moth-Poulsen K. Single-molecule electronics: from chemical design to functional devices. Chem Soc Rev 2014; 43:7378-411. [DOI: 10.1039/c4cs00143e] [Citation(s) in RCA: 361] [Impact Index Per Article: 36.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The use of single molecules in electronics represents the next limit of miniaturisation of electronic devices, which would enable to continue the trend of aggressive downscaling of silicon-based electronic devices.
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Affiliation(s)
- Lanlan Sun
- Department of Chemical and Biological Engineering
- Chalmers University of Technology
- , Sweden
| | - Yuri A. Diaz-Fernandez
- Department of Chemical and Biological Engineering
- Chalmers University of Technology
- , Sweden
| | - Tina A. Gschneidtner
- Department of Chemical and Biological Engineering
- Chalmers University of Technology
- , Sweden
| | - Fredrik Westerlund
- Department of Chemical and Biological Engineering
- Chalmers University of Technology
- , Sweden
| | - Samuel Lara-Avila
- Department of Micro and Nanotechnology
- MC2
- Chalmers University of Technology
- , Sweden
| | - Kasper Moth-Poulsen
- Department of Chemical and Biological Engineering
- Chalmers University of Technology
- , Sweden
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