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Nava EK, Singh A, Williams LO, Arango JC, Nagubandi KA, Pintro CJ, Claridge SA. Sub-10 μm Soft Interlayers Integrating Patterned Multivalent Biomolecular Binding Environments. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 39133196 DOI: 10.1021/acsami.4c05086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/13/2024]
Abstract
Designing surfaces that enable controlled presentation of multivalent ligand clusters (e.g., for rapid screening of biomolecular binding constants or design of artificial extracellular matrices) is a cross-cutting challenge in materials and interfacial chemistry. Existing approaches frequently rely on complex building blocks or scaffolds and are often specific to individual substrate chemistries. Thus, an interlayer chemistry that enabled efficient nanometer-scale patterning on a transferrable layer and subsequent integration with other classes of materials could substantially broaden the scope of surfaces available for sensors and wearable electronics. Recently, we have shown that it is possible to assemble nanometer-resolution chemical patterns on substrates including graphite, use diacetylene polymerization to lock the molecular pattern together, and then covalently transfer the pattern to amorphous materials (e.g., polydimethylsiloxane, PDMS), which would not natively enable high degrees of control over ligand presentation. Here, we develop a low-viscosity PDMS formulation that generates very thin films (<10 μm) with dense cross-linking, enabling high-efficiency surface functionalization with polydiacetylene arrays displaying carbohydrates and other functional groups (up to 10-fold greater than other soft materials we have used previously) on very thin films that can be integrated with other materials (e.g., glass and soft materials) to enable a highly controlled multivalent ligand display. We use swelling and other characterization methods to relate surface functionalization efficiency to the average distance between cross-links in the PDMS, developing design principles that can be used to create even thinner transfer layers. In the context of this work, we apply this approach using precision glycopolymers presenting structured arrays of N-acetyl glucosamine ligands for lectin binding assays. More broadly, this interlayer approach lays groundwork for designing surface layers for the presentation of ligand clusters on soft materials for applications including wearable electronics and artificial extracellular matrix.
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Affiliation(s)
- Emmanuel K Nava
- Department of Chemistry, Purdue University, West Lafayette, Indiana, 47907
| | - Anamika Singh
- Department of Chemistry, Purdue University, West Lafayette, Indiana, 47907
| | - Laura O Williams
- Department of Chemistry, Purdue University, West Lafayette, Indiana, 47907
| | - Juan C Arango
- Department of Chemistry, Purdue University, West Lafayette, Indiana, 47907
| | - Keshav A Nagubandi
- Department of Chemistry, Purdue University, West Lafayette, Indiana, 47907
| | - Chris J Pintro
- Department of Chemistry, Purdue University, West Lafayette, Indiana, 47907
| | - Shelley A Claridge
- Department of Chemistry, Purdue University, West Lafayette, Indiana, 47907
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, 47907
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2
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Tessari Z, Rinkovec T, De Feyter S. Chiral induction in substrate-supported self-assembled molecular networks under nanoconfinement conditions. NANOSCALE ADVANCES 2024; 6:892-901. [PMID: 38298576 PMCID: PMC10825934 DOI: 10.1039/d3na00894k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 01/04/2024] [Indexed: 02/02/2024]
Abstract
Self-assembly on surfaces often produces chiral networks, even when starting from achiral building blocks. However, when achiral molecules are used to produce chiral networks, two possible enantiomorphs are created with equal probability, rendering therefore the overall surface achiral. This outcome can be changed by finding a way to promote the preferential formation of one of the two enantiomorphs. In this regard, the creation of nanoconfined space, which has been called molecular corral, having a chosen orientation with respect to the substrate symmetry has been demonstrated to be a valid way to obtain the preferential self-assembly of a network having a determined chirality. In this study we aim to further expand the understanding of the principles of such mechanism, in particular by looking at unexplored parameters that could have a role in the production of the observed bias. In this way a deeper comprehension of the mechanisms at the base of the chiral self-assembly could be obtained.
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Affiliation(s)
- Zeno Tessari
- Division of Molecular Imaging and Photonics, Department of Chemistry KU Leuven, Celestijnenlaan 200 F 3001 Leuven Belgium
| | - Tamara Rinkovec
- Division of Molecular Imaging and Photonics, Department of Chemistry KU Leuven, Celestijnenlaan 200 F 3001 Leuven Belgium
| | - Steven De Feyter
- Division of Molecular Imaging and Photonics, Department of Chemistry KU Leuven, Celestijnenlaan 200 F 3001 Leuven Belgium
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3
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Li Z, Li Y, Yin C. Manipulating Molecular Self-Assembly Process at the Solid-Liquid Interface Probed by Scanning Tunneling Microscopy. Polymers (Basel) 2023; 15:4176. [PMID: 37896420 PMCID: PMC10610993 DOI: 10.3390/polym15204176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 10/16/2023] [Accepted: 10/18/2023] [Indexed: 10/29/2023] Open
Abstract
The phenomenon of ordered self-assembly on solid substrates is a topic of interest in both fundamental surface science research and its applications in nanotechnology. The regulation and control of two-dimensional (2D) self-assembled supra-molecular structures on surfaces have been realized through applying external stimuli. By utilizing scanning tunneling microscopy (STM), researchers can investigate the detailed phase transition process of self-assembled monolayers (SAMs), providing insight into the interplay between intermolecular weak interactions and substrate-molecule interactions, which govern the formation of molecular self-assembly. This review will discuss the structural transition of self-assembly probed by STM in response to external stimuli and provide state-of-the-art methods such as tip-induced confinement for the alignment of SAM domains and selective chirality. Finally, we discuss the challenges and opportunities in the field of self-assembly and STM.
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Affiliation(s)
| | - Yanan Li
- School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, China;
| | - Chengjie Yin
- School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, China;
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4
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Liu JW, Wang Y, Kang LX, Zhao Y, Xing GY, Huang ZY, Zhu YC, Li DY, Liu PN. Two-Dimensional Crystal Transition from Radialene to Cumulene on Ag(111) via Retro-[2 + 1] Cycloaddition. J Am Chem Soc 2023. [PMID: 37289993 DOI: 10.1021/jacs.3c00962] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Two-dimensional (2D) crystal-to-crystal transition is an important method in crystal engineering because of its ability to directly create diverse crystal materials from one crystal. However, steering a 2D single-layer crystal-to-crystal transition on surfaces with high chemo- and stereoselectivity under ultra-high vacuum conditions is a great challenge because the transition is a complex dynamic process. Here, we report a highly chemoselective 2D crystal transition from radialene to cumulene with retention of stereoselectivity on Ag(111) via retro-[2 + 1] cycloaddition of three-membered carbon rings and directly visualize the transition process involving a stepwise epitaxial growth mechanism by the combination of scanning tunneling microscopy and non-contact atomic force microscopy. Using progression annealing, we found that isocyanides on Ag(111) at a low annealing temperature underwent sequential [1 + 1 + 1] cycloaddition and enantioselective molecular recognition based on C-H···Cl hydrogen bonding interactions to form 2D triaza[3]radialene crystals. In contrast, a higher annealing temperature induced the transformation of triaza[3]radialenes to generate trans-diaza[3]cumulenes, which were further assembled into 2D cumulene-based crystals through twofold N-Ag-N coordination and C-H···Cl hydrogen bonding interactions. By combining the observed distinct transient intermediates and density functional theory calculations, we demonstrate that the retro-[2 + 1] cycloaddition reaction proceeds via the ring opening of a three-membered carbon ring, sequential dechlorination/hydrogen passivation, and deisocyanation. Our findings provide new insights into the growth mechanism and dynamics of 2D crystals and have implications for controllable crystal engineering.
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Affiliation(s)
- Jian-Wei Liu
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, State Key Laboratory of Chemical Engineering, School of Chemistry and Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, China
| | - Ying Wang
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, State Key Laboratory of Chemical Engineering, School of Chemistry and Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, China
| | - Li-Xia Kang
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, State Key Laboratory of Chemical Engineering, School of Chemistry and Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, China
| | - Yan Zhao
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, State Key Laboratory of Chemical Engineering, School of Chemistry and Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, China
| | - Guang-Yan Xing
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, State Key Laboratory of Chemical Engineering, School of Chemistry and Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, China
| | - Zheng-Yang Huang
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, State Key Laboratory of Chemical Engineering, School of Chemistry and Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, China
| | - Ya-Cheng Zhu
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, State Key Laboratory of Chemical Engineering, School of Chemistry and Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, China
| | - Deng-Yuan Li
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, State Key Laboratory of Chemical Engineering, School of Chemistry and Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, China
| | - Pei-Nian Liu
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, State Key Laboratory of Chemical Engineering, School of Chemistry and Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, China
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5
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Yamagata K, Maeda M, Tessari Z, Mali KS, Tobe Y, De Feyter S, Tahara K. Solvent Mediated Nanoscale Quasi-Periodic Chirality Reversal in Self-Assembled Molecular Networks Featuring Mirror Twin Boundaries. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2207209. [PMID: 36683210 DOI: 10.1002/smll.202207209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 12/30/2022] [Indexed: 06/17/2023]
Abstract
Grain boundaries in polycrystals have a prominent impact on the properties of a material, therefore stimulating the research on grain boundary engineering. Structure determination of grain boundaries of molecule-based polycrystals with submolecular resolution remains elusive. Reducing the complexity to monolayers has the potential to simplify grain boundary engineering and may offer real-space imaging with submolecular resolution using scanning tunneling microscopy (STM). Herein, the authors report the observation of quasi-periodic nanoscale chirality switching in self-assembled molecular networks, in combination with twinning, as revealed by STM at the liquid/solid interface. The width of the chiral domain structure peaks at 12-19 nm. Adjacent domains having opposite chirality are connected continuously through interdigitated alkoxy chains forming a 1D defect-free domain border, reflecting a mirror twin boundary. Solvent co-adsorption and the inherent conformational adaptability of the alkoxy chains turn out to be crucial factors in shaping grain boundaries. Moreover, the epitaxial interaction with the substrate plays a role in the nanoscale chirality reversal as well.
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Affiliation(s)
- Kyohei Yamagata
- Department of Applied Chemistry, School of Science and Technology, Meiji University, 1-1-1 Higashimita, Tama-ku, Kawasaki, 214-8571, Japan
| | - Matsuhiro Maeda
- Department of Applied Chemistry, School of Science and Technology, Meiji University, 1-1-1 Higashimita, Tama-ku, Kawasaki, 214-8571, Japan
| | - Zeno Tessari
- Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200 F, 3001, Leuven, Belgium
| | - Kunal S Mali
- Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200 F, 3001, Leuven, Belgium
| | - Yoshito Tobe
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu, 30030, Taiwan
- Nanoscience and Nanotechnology Center, The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Osaka, 567-0047, Japan
| | - Steven De Feyter
- Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200 F, 3001, Leuven, Belgium
| | - Kazukuni Tahara
- Department of Applied Chemistry, School of Science and Technology, Meiji University, 1-1-1 Higashimita, Tama-ku, Kawasaki, 214-8571, Japan
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6
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Covalent transfer of chemical gradients onto a graphenic surface with 2D and 3D control. Nat Commun 2022; 13:7006. [PMID: 36384990 PMCID: PMC9668971 DOI: 10.1038/s41467-022-34684-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Accepted: 11/02/2022] [Indexed: 11/17/2022] Open
Abstract
Control over the functionalization of graphenic materials is key to enable their full application in electronic and optical technologies. Covalent functionalization strategies have been proposed as an approach to tailor the interfaces’ structure and properties. However, to date, none of the proposed methods allow for a covalent functionalization with control over the grafting density, layer thickness and/or morphology, which are key aspects for fine-tuning the processability and performance of graphenic materials. Here, we show that the no-slip boundary condition at the walls of a continuous flow microfluidic device offers a way to generate controlled chemical gradients onto a graphenic material with 2D and 3D control, a possibility that will allow the sophisticated functionalization of these technologically-relevant materials. Covalent modification is an essential chemical method for altering the physicochemical properties of material interfaces. Here, the authors show that the no-slip conditions in microfluidic devices grant spatiotemporal control over molecular grafting.
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7
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Pálinkás A, Kálvin G, Vancsó P, Kandrai K, Szendrő M, Németh G, Németh M, Pekker Á, Pap JS, Petrik P, Kamarás K, Tapasztó L, Nemes-Incze P. The composition and structure of the ubiquitous hydrocarbon contamination on van der Waals materials. Nat Commun 2022; 13:6770. [PMID: 36351922 PMCID: PMC9646725 DOI: 10.1038/s41467-022-34641-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Accepted: 11/02/2022] [Indexed: 11/10/2022] Open
Abstract
The behavior of single layer van der Waals (vdW) materials is profoundly influenced by the immediate atomic environment at their surface, a prime example being the myriad of emergent properties in artificial heterostructures. Equally significant are adsorbates deposited onto their surface from ambient. While vdW interfaces are well understood, our knowledge regarding atmospheric contamination is severely limited. Here we show that the common ambient contamination on the surface of: graphene, graphite, hBN and MoS2 is composed of a self-organized molecular layer, which forms during a few days of ambient exposure. Using low-temperature STM measurements we image the atomic structure of this adlayer and in combination with infrared spectroscopy identify the contaminant molecules as normal alkanes with lengths of 20-26 carbon atoms. Through its ability to self-organize, the alkane layer displaces the manifold other airborne contaminant species, capping the surface of vdW materials and possibly dominating their interaction with the environment. Here, the authors attribute the ambient surface contamination of van der Waals materials to a self-organized molecular layer of normal alkanes with lengths of 20-26 carbon atoms. The alkane adlayer displaces the manifold other airborne contaminant species, capping the surface of graphene, graphite, hBN and MoS2.
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8
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Li H, Chen R, Zhu X, Ye D, Yang Y, Li W, Li D, Liao Q. Light Controlled 3D Crystal Morphology for Droplet Evaporative Crystallization on Photosensitive Hydrophobic Substrate. J Phys Chem Lett 2022; 13:5910-5917. [PMID: 35730790 DOI: 10.1021/acs.jpclett.2c01698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Controlling crystal morphology is crucial in analytical chemistry and smart materials synthesis, etc. However, flexible manipulation of 3D crystal morphology still remains challenging. Herein, we present a novel and facile light strategy for droplet evaporative crystallization to manipulate macroscopic crystal morphology on photosensitive hydrophobic substrate possessing photothermal conversion property. We demonstrate that the spherical coronal shell and alms bowl-like crystal skeletons can be achieved on smooth photosensitive hydrophobic substrate, depending on the salt concentration. Rough photosensitive hydrophobic substrate further creates a bubble-assisted light strategy, by which a cylindrical shell-like crystal skeleton with a directionally controllable cavity is achieved. Amazingly, the proper additive endows droplet evaporative crystallization to form a closed crystal skeleton with the solution wrapped inside. The present study provides new ideas for designing a novel optical droplet microfluidic platform for controlling crystal morphology.
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Affiliation(s)
- Haonan Li
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China
- Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
| | - Rong Chen
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China
- Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
| | - Xun Zhu
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China
- Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
| | - Dingding Ye
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China
- Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
| | - Yang Yang
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China
- Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
| | - Wei Li
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China
- Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
| | - Dongliang Li
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China
- Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
| | - Qiang Liao
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China
- Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
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9
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Goll FD, Taubmann G, Ziener U. Static Scanning Tunneling Microscopy Images Reveal the Mechanism of Supramolecular Polymerization of an Oligopyridine on Graphite. Angew Chem Int Ed Engl 2022; 61:e202117580. [PMID: 35138691 PMCID: PMC9307023 DOI: 10.1002/anie.202117580] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Indexed: 11/18/2022]
Abstract
Supramolecular polymerization of a donor–acceptor bisterpyridine (BTP) equipped with an electron‐rich carbazole unit is observed by scanning tunneling microscopy (STM) at the highly oriented pyrolytic graphite (HOPG)|solution interface. It is shown that two‐dimensional crystals of supramolecular (co)polymers are formed by chain growth polymerization, which in turn can be described by copolymerization statistics. From concentration‐dependent measurements, derived copolymerization parameters and DFT calculations, a mechanism for self‐assembly is developed that suggests a kinetically driven polymerization process in combination with thermodynamically controlled crystallization.
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Affiliation(s)
- Felix D. Goll
- Ulm University Institute of Organic Chemistry III Albert-Einstein-Allee 11 89081 Ulm Germany
| | - Gerhard Taubmann
- Ulm University Institute of Theoretical Chemistry Albert-Einstein-Allee 11 89081 Ulm Germany
| | - Ulrich Ziener
- Ulm University Institute of Organic Chemistry III Albert-Einstein-Allee 11 89081 Ulm Germany
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10
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Zheng CY, Yao Y, Deng J, Seifert S, Wong AM, Lee B, Mirkin CA. Confined Growth of DNA-Assembled Superlattice Films. ACS NANO 2022; 16:4813-4822. [PMID: 35213130 DOI: 10.1021/acsnano.2c00161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
We study the assembly of DNA-functionalized nanocubes under lateral confinement in microscale square trenches on a DNA-functionalized substrate. Microfocus small-angle X-ray scattering (SAXS) and scanning electron microscopy (SEM) are used to characterize the superlattices (SLs). The results indicate that nanocubes form simple-cubic SLs with square-prism morphology and a (100) out-of-plane orientation to maximize DNA bonding. In-plane, SLs align with the template, exposing their {100} side facets, and the degree of alignment depends on trench size. Interestingly, the distribution of in-plane orientations determined from SAXS and SEM do not agree, indicating that the internal and external structures of the SLs differ. To understand this discrepancy, X-ray ptychography is employed to image the internal structures of the SLs, revealing that SLs which appear to be single-crystalline in SEM may have subsurface grain boundaries, depending on trench size. SEM reveals that the SLs grow via nucleation and growth of randomly oriented domains, which then coalesce; this mechanism explains the observed dependence of alignment and defect structure on size. Interestingly, crystallization occurs via an unusual growth mode, whereby continuous SL layers grow on top of several misoriented islands. Overall, this work elucidates the effect of lateral confinement on the crystallization of DNA-functionalized nanoparticles and shows how X-ray ptychography can be used to gain insight into nanoparticle crystallization.
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Affiliation(s)
| | - Yudong Yao
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Junjing Deng
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Soenke Seifert
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | | | - Byeongdu Lee
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
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11
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Li Z, Li K, Wang S, Teng C. Covalent Patterning of Graphene for Controllable Functionalization from Microscale to Nanoscale: A Mini-Review. Front Chem 2022; 10:829614. [PMID: 35360538 PMCID: PMC8963783 DOI: 10.3389/fchem.2022.829614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 01/31/2022] [Indexed: 11/13/2022] Open
Abstract
Covalent patterning of graphene opens many application possibilities in the field of photonics, electronics, sensors, and catalysis due to order-dependent optical properties, band structure engineering, and processibility and reactivity improvement. Owing to the low reactivity of the graphene basal plane, harsh reagents (e.g., radicals) used for covalent functionalization normally result in poor spatial control, which largely compromises the intrinsic properties of graphene. Therefore, precisely spatial control on covalent patterning of graphene is of great importance. Herein, we summarize recent advances for covalent patterning of graphene from the microscale to nanoscale resolution using different techniques such as laser or electrochemical writing, template-directed growth, and tip-induced nanoshaving.
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Affiliation(s)
- Zhi Li
- Institute of Marine Biomedicine, Shenzhen Polytechnic, Shenzhen, China
- National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, China
- *Correspondence: Zhi Li, ; Chao Teng,
| | - Kai Li
- Institute of Marine Biomedicine, Shenzhen Polytechnic, Shenzhen, China
- National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, China
| | - Shuang Wang
- Institute of Marine Biomedicine, Shenzhen Polytechnic, Shenzhen, China
- National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, China
| | - Chao Teng
- Institute of Marine Biomedicine, Shenzhen Polytechnic, Shenzhen, China
- *Correspondence: Zhi Li, ; Chao Teng,
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12
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Geometric constraints of molecular self-assembly of normal alkanes on graphite. APPLIED NANOSCIENCE 2022. [DOI: 10.1007/s13204-021-01713-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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13
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Goll FD, Taubmann G, Ziener U. Statische Rastertunnelmikroskopie‐Bilder enthüllen den Mechanismus der supramolekularen Polymerisation eines Oligopyridins auf Graphit. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202117580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Felix D. Goll
- Universität Ulm Institut für Organische Chemie III Albert-Einstein-Allee 11 89081 Ulm Deutschland
| | - Gerhard Taubmann
- Universität Ulm Institut für Theoretische Chemie Albert-Einstein-Allee 11 89081 Ulm Deutschland
| | - Ulrich Ziener
- Universität Ulm Institut für Organische Chemie III Albert-Einstein-Allee 11 89081 Ulm Deutschland
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14
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Hu Y, Lee SL, Deng W. Odd-Even Effect on Supramolecular Co-Assemblies: Control over the Two-Dimensional Self-Assemblies of a Fluorenone Derivative with Asymmetrically Substituted Alkyl Chains. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:1757-1765. [PMID: 35084866 DOI: 10.1021/acs.langmuir.1c02866] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The precise control of two-dimensional supramolecular co-assemblies presents a research topic related to advance nanotechnology. Here, we report a scanning tunneling microscopy (STM) study of the mixture behavior of three fluorenone derivatives at the liquid-solid interface. The target molecule is F-C12C13 whose structure bears asymmetrical alkyls, whereas the regulating molecules, either F-C12C12 or F-C13C13, are structurally symmetric. By STM imaging of systematic mixtures with various volumes among the sample solutions, we found that the mixing ratio mainly determined the binary outcomes. Compared with F-C12C12, F-C13C13 shows a stronger ability to dominate the patterning, explained by the larger binding and adsorption energies calculated by the force field simulations. Moreover, the odd-even effect exists in the system. Overall, we acquired knowledge about the regulating ability of bi-component supramolecular assembling, especially for structurally asymmetric molecular systems.
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Affiliation(s)
- Yi Hu
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Shern-Long Lee
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Wenli Deng
- College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
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15
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Abstract
The evolution of lipids in nanoscience exemplifies the powerful coupling of advances in science and technology. Here, we describe two waves of discovery and innovation in lipid materials: one historical and one still building. The first wave leveraged the relatively simple capability for lipids to orient at interfaces, building layers of functional groups. This simple form of building with atoms yielded a stunning range of technologies: lubricant additives that dramatically extended machine lifetimes, molecules that enabled selective ore extraction in mining, and soaps that improved human health. It also set the stage for many areas of modern nanoscience. The second wave of lipid materials, still growing, uses the more complex toolkits lipids offer for building with atoms, including controlling atomic environment to control function (e.g., pKa tuning) and the generation of more arbitrary two-dimensional and three-dimensional structures, including lipid nanoparticles for COVID-19 mRNA vaccines.
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Affiliation(s)
- Anni Shi
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Shelley A Claridge
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
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16
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Bragança AM, Minoia A, Steeno R, Seibel J, Hirsch BE, Verstraete L, Ivasenko O, Müllen K, Mali KS, Lazzaroni R, De Feyter S. Detection and Stabilization of a Previously Unknown Two-Dimensional (Pseudo)polymorph using Lateral Nanoconfinement. J Am Chem Soc 2021; 143:11080-11087. [PMID: 34283574 DOI: 10.1021/jacs.1c04445] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report on the detection and stabilization of a previously unknown two-dimensional (2D) pseudopolymorph of an alkoxy isophthalic acid using lateral nanoconfinement. The self-assembled molecular networks formed by the isophthalic acid derivative were studied at the interface between covalently modified graphite and an organic solvent. When self-assembled on graphite with moderate surface coverage of covalently bound aryl groups, a previously unknown metastable pseudopolymorph was detected. This pseudopolymorph, which was presumably "trapped" in between the surface bound aryl groups, underwent a time-dependent phase transition to the stable polymorph typically observed on pristine graphite. The stabilization of the pseudopolymorph was then achieved by using an alternative nanoconfinement strategy, where the domains of the pseudopolymorph could be formed and stabilized by restricting the self-assembly in nanometer-sized shallow compartments produced by STM-based nanolithography carried out on a graphite surface with a high density of covalently bound aryl groups. These experimental results are supported by molecular mechanics and molecular dynamics simulations, which not only provide important insight into the relative stabilities of the different structures, but also shed light onto the mechanism of the formation and stabilization of the pseudopolymorph under nanoscopic lateral confinement.
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Affiliation(s)
- Ana M Bragança
- Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Andrea Minoia
- Laboratory for Chemistry of Novel Materials, Materials Research Institute, University of Mons, Place du Parc 20, 7000 Mons, Belgium
| | - Roelof Steeno
- Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Johannes Seibel
- Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Brandon E Hirsch
- Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Lander Verstraete
- Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Oleksandr Ivasenko
- Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Klaus Müllen
- Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| | - Kunal S Mali
- Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Roberto Lazzaroni
- Laboratory for Chemistry of Novel Materials, Materials Research Institute, University of Mons, Place du Parc 20, 7000 Mons, Belgium
| | - Steven De Feyter
- Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
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17
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Verstraete L, De Feyter S. 2D Self-assembled molecular networks and on-surface reactivity under nanoscale lateral confinement. Chem Soc Rev 2021; 50:5884-5897. [PMID: 34027935 DOI: 10.1039/d0cs01338b] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Supramolecular self-assembly at surfaces provides a pathway for building chemically customized interfaces. Over the last three decades, research on the role of key parameters such as temperature, solute concentration, and molecular design has enabled a steady increase in the complexity of self-assembled molecular networks (SAMNs) that can thus be created. However, the structure and quality of SAMNs is often determined during the early stages of nucleation and growth. To study and influence self-assembly processes at this deterministic length scale, spatial confinement of molecular adsorbates to well-defined surface patterns with nanoscale lateral dimensions offers exciting possibilities. The aim of this tutorial review is to give an overview of the various ways in which confinement impacts SAMN formation, and how we can use that knowledge to direct assemblies towards desired structures. The possibility to exploit confinement for improved control over on-surface reactions is also contemplated.
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Affiliation(s)
- Lander Verstraete
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven-University of Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.
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18
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Seibel J, Tessari Z, Amabilino DB, De Feyter S. Chirality from scratch: enantioselective adsorption in geometrically controlled lateral nanoconfinement. Chem Commun (Camb) 2021; 57:61-64. [PMID: 33289742 DOI: 10.1039/d0cc06845d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Chiral symmetry breaking in molecular adsorption at the solid/liquid interface by lateral geometric nanoconfinement is demonstrated. The chiral nanoconfinement is created at the interface of achiral covalently modified highly-oriented pyrolytic graphite and a racemate by in situ scanning probe lithography. Enantioselective adsorption of chiral molecules is achieved by adjusting the relative orientation between the nanoconfining walls and substrate symmetry direction.
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Affiliation(s)
- Johannes Seibel
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven - University of Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.
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19
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Berrocal J, Heideman GH, de Waal BFM, Meijer EW, Feringa BL. Combinatorial Selection Among Geometrical Isomers of Discrete Long-Carbon-Chain Naphthalenediimides Induces Local Order at the Liquid/Solid Interface. ACS NANO 2020; 14:13865-13875. [PMID: 32914965 PMCID: PMC7596778 DOI: 10.1021/acsnano.0c06274] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 09/11/2020] [Indexed: 06/11/2023]
Abstract
We report two families of naphthalenediimides (NDIs) symmetrically functionalized with discrete carbon chains comprising up to 55 carbon atoms (Cn-NDI-Cn, n = 39, 44, 50, and 55) and their self-assembly at the 1-phenyloctane/highly oriented pyrolytic graphite interface (1-PO/HOPG interface). The compounds differ by the presence or absence of two or three internal double bonds in the carbon chains (unsaturated and saturated Cn-NDI-Cn, respectively). Combinatorial distributions of geometrical isomers displaying either the E- or Z-configuration at each double bond are obtained for the unsaturated compounds. Analysis of the self-assembled monolayers of equally long unsaturated and saturated Cn-NDI-Cn by scanning tunneling microscopy (STM) reveal that all Cn-NDI-Cn tend to form lamellar systems featuring alternating areas of aromatic cores and carbon chains. Extended chain lengths are found to significantly increase disorder in the self-assembled monolayers due to misalignments and enhanced strength of interchain interactions. This phenomenon is antagonized by the local order-inducing effect of the internal double bonds: unsaturated Cn-NDI-Cn give qualitatively more ordered self-assembled monolayers compared to their saturated counterparts. The use of combinatorial distributions of unsaturated Cn-NDI-Cn geometrical isomers does not represent a limitation to achieve local order in the self-assembled monolayers. The self-assembly process operates a combinatorial search and selects the geometrical isomer(s) affording the most thermodynamically stable pattern, highlighting the adaptive character of the system. Finally, the antagonistic interplay between the extended carbon chain lengths and the presence of internal double bonds brings to the discovery of the lamellar "phase C" morphology for unsaturated Cn-NDI-Cn with n ≥ 50.
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Affiliation(s)
- José
Augusto Berrocal
- Stratingh
Institute for Chemistry, University of Groningen, Nijenborgh 4, Groningen 9747 AG, The
Netherlands
- Institute
for Complex Molecular Systems and Laboratory of Macromolecular and
Organic Chemistry, Eindhoven University
of Technology, Eindhoven 5600 MB, The Netherlands
| | - G. Henrieke Heideman
- Stratingh
Institute for Chemistry, University of Groningen, Nijenborgh 4, Groningen 9747 AG, The
Netherlands
| | - Bas F. M. de Waal
- Institute
for Complex Molecular Systems and Laboratory of Macromolecular and
Organic Chemistry, Eindhoven University
of Technology, Eindhoven 5600 MB, The Netherlands
| | - E. W. Meijer
- Institute
for Complex Molecular Systems and Laboratory of Macromolecular and
Organic Chemistry, Eindhoven University
of Technology, Eindhoven 5600 MB, The Netherlands
| | - Ben L. Feringa
- Stratingh
Institute for Chemistry, University of Groningen, Nijenborgh 4, Groningen 9747 AG, The
Netherlands
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20
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Nieckarz D, Szabelski P. Theoretical Modeling of the Surface-Guided Self-Assembly of Functional Molecules. Chemphyschem 2020; 21:643-650. [PMID: 31894625 DOI: 10.1002/cphc.201901105] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 12/20/2019] [Indexed: 11/06/2022]
Abstract
Directing the self-assembly of organic building blocks with 2D templates has been a promising method to create molecular superstructures having unique physicochemical properties. In this work the on-surface self-assembly of simple ditopic functional molecules confined inside periodic nanotemplates was modeled by means of the lattice Monte Carlo simulation method. Two types of confinement, that is honeycomb porous networks and parallel grooves of controlled diameter and width were used in the calculations. Additionally, the effect of (pro)chirality of the adsorbing molecules on the outcome of the templated self-assembly was examined. To that end, enantiopure and racemic assemblies were studied and the resulting structures were identified and classified. The obtained findings demonstrated that suitable tuning of the structural parameters of the templates enables directing the self-assembly towards linear and cyclic aggregates with controlled size. Moreover, chiral resolution of the molecular conformers using honeycomb networks with adjusted pore size was found possible. Our theoretical predictions can be helpful in designing structured surfaces to direct self-assembly and polymerization of organic functional building blocks.
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Affiliation(s)
- Damian Nieckarz
- Department of Theoretical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, MariaCurie-Skłodowska University in Lublin, Pl. M.C. Skłodowskiej 3, 20-031, Lublin, Poland
| | - Paweł Szabelski
- Department of Theoretical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, MariaCurie-Skłodowska University in Lublin, Pl. M.C. Skłodowskiej 3, 20-031, Lublin, Poland
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21
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Berrocal JA, Heideman GH, de Waal BFM, Enache M, Havenith RWA, Stöhr M, Meijer EW, Feringa BL. Engineering Long-Range Order in Supramolecular Assemblies on Surfaces: The Paramount Role of Internal Double Bonds in Discrete Long-Chain Naphthalenediimides. J Am Chem Soc 2020; 142:4070-4078. [PMID: 31971383 PMCID: PMC7047225 DOI: 10.1021/jacs.0c00765] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
![]()
Achieving
long-range order with surface-supported supramolecular
assemblies is one of the pressing challenges in the prospering field
of non-covalent surface functionalization. Having access to defect-free
on-surface molecular assemblies will pave the way for various nanotechnology
applications. Here we report the synthesis of two libraries of naphthalenediimides
(NDIs) symmetrically functionalized with long aliphatic chains (C28 and C33) and their self-assembly at the 1-phenyloctane/highly
oriented pyrolytic graphite (1-PO/HOPG) interface. The two NDI libraries
differ by the presence/absence of an internal double bond in each
aliphatic chain (unsaturated and saturated compounds, respectively).
All molecules assemble into lamellar arrangements, with the NDI cores
lying flat and forming 1D rows on the surface, while the carbon chains
separate the 1D rows from each other. Importantly, the presence of
the unsaturation plays a dominant role in the arrangement of the aliphatic
chains, as it exclusively favors interdigitation. The fully saturated
tails, instead, self-assemble into a combination of either interdigitated
or non-interdigitated diagonal arrangements. This difference in packing
is spectacularly amplified at the whole surface level and results
in almost defect-free self-assembled monolayers for the unsaturated
compounds. In contrast, the monolayers of the saturated counterparts
are globally disordered, even though they locally preserve the lamellar arrangements. The experimental
observations are supported by computational studies and are rationalized
in terms of stronger van der Waals interactions in the case of the
unsaturated compounds. Our investigation reveals the paramount role
played by internal double bonds on the self-assembly of discrete large
molecules at the liquid/solid interface.
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Affiliation(s)
- José Augusto Berrocal
- Stratingh Institute for Chemistry , University of Groningen , Nijenborgh 4 , 9747 AG Groningen , The Netherlands.,Institute for Complex Molecular Systems and Laboratory of Macromolecular and Organic Chemistry , Eindhoven University of Technology , 5600 MB Eindhoven , The Netherlands
| | - G Henrieke Heideman
- Stratingh Institute for Chemistry , University of Groningen , Nijenborgh 4 , 9747 AG Groningen , The Netherlands
| | - Bas F M de Waal
- Institute for Complex Molecular Systems and Laboratory of Macromolecular and Organic Chemistry , Eindhoven University of Technology , 5600 MB Eindhoven , The Netherlands
| | - Mihaela Enache
- Zernike Institute for Advanced Materials , University of Groningen , Nijenborgh 4 , 9747 AG Groningen , The Netherlands
| | - Remco W A Havenith
- Stratingh Institute for Chemistry , University of Groningen , Nijenborgh 4 , 9747 AG Groningen , The Netherlands.,Zernike Institute for Advanced Materials , University of Groningen , Nijenborgh 4 , 9747 AG Groningen , The Netherlands.,Department of Inorganic and Physical Chemistry , Ghent University , Krijgslaan 281 (S3) , B-9000 Gent , Belgium
| | - Meike Stöhr
- Zernike Institute for Advanced Materials , University of Groningen , Nijenborgh 4 , 9747 AG Groningen , The Netherlands
| | - E W Meijer
- Institute for Complex Molecular Systems and Laboratory of Macromolecular and Organic Chemistry , Eindhoven University of Technology , 5600 MB Eindhoven , The Netherlands
| | - Ben L Feringa
- Stratingh Institute for Chemistry , University of Groningen , Nijenborgh 4 , 9747 AG Groningen , The Netherlands.,Zernike Institute for Advanced Materials , University of Groningen , Nijenborgh 4 , 9747 AG Groningen , The Netherlands
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22
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Seibel J, Amabilino DB, De Feyter S. Preferred Formation of Minority Concomitant Polymorphs in 2D Self‐Assembly under Lateral Nanoconfinement. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908552] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Johannes Seibel
- Department of Chemistry Division of Molecular Imaging and Photonics KU Leuven—University of Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - David B. Amabilino
- School of Chemistry & The GSK Carbon Neutral Laboratories for Sustainable Chemistry The University of Nottingham Triumph Road Nottingham NG7 2TU UK
| | - Steven De Feyter
- Department of Chemistry Division of Molecular Imaging and Photonics KU Leuven—University of Leuven Celestijnenlaan 200F 3001 Leuven Belgium
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23
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Seibel J, Amabilino DB, De Feyter S. Preferred Formation of Minority Concomitant Polymorphs in 2D Self‐Assembly under Lateral Nanoconfinement. Angew Chem Int Ed Engl 2019; 58:12964-12968. [DOI: 10.1002/anie.201908552] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Johannes Seibel
- Department of Chemistry Division of Molecular Imaging and Photonics KU Leuven—University of Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - David B. Amabilino
- School of Chemistry & The GSK Carbon Neutral Laboratories for Sustainable Chemistry The University of Nottingham Triumph Road Nottingham NG7 2TU UK
| | - Steven De Feyter
- Department of Chemistry Division of Molecular Imaging and Photonics KU Leuven—University of Leuven Celestijnenlaan 200F 3001 Leuven Belgium
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24
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Phan TH, Van Gorp H, Li Z, Trung Huynh TM, Fujita Y, Verstraete L, Eyley S, Thielemans W, Uji-I H, Hirsch BE, Mertens SFL, Greenwood J, Ivasenko O, De Feyter S. Graphite and Graphene Fairy Circles: A Bottom-Up Approach for the Formation of Nanocorrals. ACS NANO 2019; 13:5559-5571. [PMID: 31013051 DOI: 10.1021/acsnano.9b00439] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A convenient covalent functionalization approach and nanopatterning method of graphite and graphene is developed. In contrast to expectations, electrochemically activated dediazotization of a mixture of two aryl diazonium compounds in aqueous media leads to a spatially inhomogeneous functionalization of graphitic surfaces, creating covalently modified surfaces with quasi-uniform spaced islands of pristine graphite or graphene, coined nanocorrals. Cyclic voltammetry and chronoamperometry approaches are compared. The average diameter (45-130 nm) and surface density (20-125 corrals/μm2) of these nanocorrals are tunable. These chemically modified nanostructured graphitic (CMNG) surfaces are characterized by atomic force microscopy, scanning tunneling microscopy, Raman spectroscopy and microscopy, and X-ray photoelectron spectroscopy. Mechanisms leading to the formation of these CMNG surfaces are discussed. The potential of these surfaces to investigate supramolecular self-assembly and on-surface reactions under nanoconfinement conditions is demonstrated.
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Affiliation(s)
- Thanh Hai Phan
- Department of Chemistry, Division of Molecular Imaging and Photonics , KU Leuven , Celestijnenlaan 200F , B-3001 Leuven , Belgium
- Department of Physics , Quy Nhon University , 170 An Duong Vuong , Quy Nhon , Vietnam
| | - Hans Van Gorp
- Department of Chemistry, Division of Molecular Imaging and Photonics , KU Leuven , Celestijnenlaan 200F , B-3001 Leuven , Belgium
| | - Zhi Li
- Department of Chemistry, Division of Molecular Imaging and Photonics , KU Leuven , Celestijnenlaan 200F , B-3001 Leuven , Belgium
| | - Thi Mien Trung Huynh
- Department of Chemistry, Division of Molecular Imaging and Photonics , KU Leuven , Celestijnenlaan 200F , B-3001 Leuven , Belgium
- Department of Chemistry , Quy Nhon University , 170 An Duong Vuong , Quy Nhon , Vietnam
| | - Yasuhiko Fujita
- Department of Chemistry, Division of Molecular Imaging and Photonics , KU Leuven , Celestijnenlaan 200F , B-3001 Leuven , Belgium
| | - Lander Verstraete
- Department of Chemistry, Division of Molecular Imaging and Photonics , KU Leuven , Celestijnenlaan 200F , B-3001 Leuven , Belgium
| | - Samuel Eyley
- Department of Chemical Engineering, Renewable Materials and Nanotechnology Group, Campus Kortrijk , KU Leuven , Etienne Sabbelaan 53 , 8500 Kortrijk , Belgium
| | - Wim Thielemans
- Department of Chemical Engineering, Renewable Materials and Nanotechnology Group, Campus Kortrijk , KU Leuven , Etienne Sabbelaan 53 , 8500 Kortrijk , Belgium
| | - Hiroshi Uji-I
- Department of Chemistry, Division of Molecular Imaging and Photonics , KU Leuven , Celestijnenlaan 200F , B-3001 Leuven , Belgium
| | - Brandon E Hirsch
- Department of Chemistry, Division of Molecular Imaging and Photonics , KU Leuven , Celestijnenlaan 200F , B-3001 Leuven , Belgium
| | - Stijn F L Mertens
- Department of Chemistry, Division of Molecular Imaging and Photonics , KU Leuven , Celestijnenlaan 200F , B-3001 Leuven , Belgium
- Department of Chemistry , Lancaster University , Lancaster LA1 4YB , United Kingdom
| | - John Greenwood
- Department of Chemistry, Division of Molecular Imaging and Photonics , KU Leuven , Celestijnenlaan 200F , B-3001 Leuven , Belgium
| | - Oleksandr Ivasenko
- Department of Chemistry, Division of Molecular Imaging and Photonics , KU Leuven , Celestijnenlaan 200F , B-3001 Leuven , Belgium
| | - Steven De Feyter
- Department of Chemistry, Division of Molecular Imaging and Photonics , KU Leuven , Celestijnenlaan 200F , B-3001 Leuven , Belgium
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25
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Tahara K, Kubo Y, Lindner B, Hashimoto S, Hirose S, Brown A, Hirsch B, Daukiya L, De Feyter S, Tobe Y. Steric and Electronic Effects of Electrochemically Generated Aryl Radicals on Grafting of the Graphite Surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:2089-2098. [PMID: 30626188 DOI: 10.1021/acs.langmuir.8b03339] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Grafting of aryl radicals generated by electrochemical reduction of aryldiazonium salts has been extensively studied on various surfaces. However, there exists two unclear aspects; the first one is the generality of the blocking ability of simple functional groups toward multilayer growth, and the second one is the electronic impact of substituent groups of aryl radicals on grafting efficiency. To address these aspects, we have studied the electrochemical functionalization of graphite using aryldiazonium salts having electron-donating or electron-withdrawing groups at the 3,4,5-positions. Atomic force microscopy investigation of the functionalized surfaces revealed the formation of monolayers for all aryldiazonium salts, and thus, nitro, carboxy, ester, methyl, and methoxy groups at the 3,4,5-positions of the benzene ring suppress polyaryl growth. The degree of grafting estimated by scanning tunneling microscopy imaging and Raman spectroscopy of the functionalized surfaces depends on the electronic state of the aryl radicals, in which the radicals with electron-donating groups show a high degree of functionalization, whereas those with electron-withdrawing groups exhibit a low degree of functionalization. We discuss several possibilities that affect grafting density. Though there are several factors, we hypothesize that one factor to explain the observed reactivity trend is the electronic property of the aryl radicals, namely, the relative position of the singly occupied molecular orbital energy levels of the aryl radicals with respect to the graphite Fermi energy level.
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Affiliation(s)
- Kazukuni Tahara
- Division of Frontier Materials Science, Graduate School of Engineering Science , Osaka University , Toyonaka , Osaka 560-8531 , Japan
- Department of Applied Chemistry, School of Science and Technology , Meiji University , 1-1-1 Higashimita , Tama-ku, Kawasaki , Kanagawa 214-8571 , Japan
- PRESTO, Japan Science and Technology Agency , 4-1-8, Honcho , Kawaguchi , Saitama 332-0012 , Japan
| | - Yuki Kubo
- Division of Frontier Materials Science, Graduate School of Engineering Science , Osaka University , Toyonaka , Osaka 560-8531 , Japan
| | - Benjamin Lindner
- Division of Frontier Materials Science, Graduate School of Engineering Science , Osaka University , Toyonaka , Osaka 560-8531 , Japan
| | - Shingo Hashimoto
- Department of Applied Chemistry, School of Science and Technology , Meiji University , 1-1-1 Higashimita , Tama-ku, Kawasaki , Kanagawa 214-8571 , Japan
| | - Shingo Hirose
- Department of Applied Chemistry, School of Science and Technology , Meiji University , 1-1-1 Higashimita , Tama-ku, Kawasaki , Kanagawa 214-8571 , Japan
| | - Anton Brown
- Division of Molecular Imaging and Photonics, Department of Chemistry , KU Leuven , Celestijnenlaan 200F , Leuven 3001 , Belgium
| | - Brandon Hirsch
- Division of Molecular Imaging and Photonics, Department of Chemistry , KU Leuven , Celestijnenlaan 200F , Leuven 3001 , Belgium
| | - Lakshya Daukiya
- Division of Molecular Imaging and Photonics, Department of Chemistry , KU Leuven , Celestijnenlaan 200F , Leuven 3001 , Belgium
| | - Steven De Feyter
- Division of Molecular Imaging and Photonics, Department of Chemistry , KU Leuven , Celestijnenlaan 200F , Leuven 3001 , Belgium
| | - Yoshito Tobe
- Division of Frontier Materials Science, Graduate School of Engineering Science , Osaka University , Toyonaka , Osaka 560-8531 , Japan
- The Institute of Scientific and Industrial Research , Osaka University , Ibaraki , Osaka 567-0047 , Japan
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26
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Hu Y, Bragança AM, Verstraete L, Ivasenko O, Hirsch BE, Tahara K, Tobe Y, De Feyter S. Phase selectivity triggered by nanoconfinement: the impact of corral dimensions. Chem Commun (Camb) 2019; 55:2226-2229. [DOI: 10.1039/c8cc08602h] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Phase behavior of self-assembled molecular networks is affected by spatial confinement in corrals.
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Affiliation(s)
- Yi Hu
- Department of Chemistry
- Division of Molecular Imaging and Photonics
- KU Leuven
- B-3001 Leuven
- Belgium
| | - Ana M. Bragança
- Department of Chemistry
- Division of Molecular Imaging and Photonics
- KU Leuven
- B-3001 Leuven
- Belgium
| | - Lander Verstraete
- Department of Chemistry
- Division of Molecular Imaging and Photonics
- KU Leuven
- B-3001 Leuven
- Belgium
| | - Oleksandr Ivasenko
- Department of Chemistry
- Division of Molecular Imaging and Photonics
- KU Leuven
- B-3001 Leuven
- Belgium
| | - Brandon E. Hirsch
- Department of Chemistry
- Division of Molecular Imaging and Photonics
- KU Leuven
- B-3001 Leuven
- Belgium
| | - Kazukuni Tahara
- Department of Applied Chemistry
- School of Science and Technology
- Meiji University
- Tama-ku
- Japan
| | - Yoshito Tobe
- Department of Applied Chemistry
- School of Science and Technology
- Meiji University
- Tama-ku
- Japan
| | - Steven De Feyter
- Department of Chemistry
- Division of Molecular Imaging and Photonics
- KU Leuven
- B-3001 Leuven
- Belgium
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27
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Tahara K, Ishikawa T, Hirsch BE, Kubo Y, Brown A, Eyley S, Daukiya L, Thielemans W, Li Z, Walke P, Hirose S, Hashimoto S, De Feyter S, Tobe Y. Self-Assembled Monolayers as Templates for Linearly Nanopatterned Covalent Chemical Functionalization of Graphite and Graphene Surfaces. ACS NANO 2018; 12:11520-11528. [PMID: 30387985 DOI: 10.1021/acsnano.8b06681] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
An approach for nanoscale covalent functionalization of graphite surfaces employing self-assembled molecular monolayers of n-alkanes as templating masks is presented. Linearly aligned aryl groups with a lateral periodicity of 5 or 7 nm are demonstrated utilizing molecular templates of different lengths. The key feature of this approach is the use of a phase separated solution double layer consisting of a thin organic layer containing template molecules topped by an aqueous layer containing aryldiazonium molecules capable of electrochemical reduction to generate aryl radicals which bring about surface grafting. Upon sweeping of the potential, lateral displacement dynamics at the n-alkane terminal edges acts in conjunction with electrochemical diffusion to result in templated covalent bond formation in a linear fashion. This protocol was demonstrated to be applicable to linear grafting of graphene. The present processing described herein is useful for the realization of rationally designed nanoscale materials.
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Affiliation(s)
- Kazukuni Tahara
- Division of Frontier Materials Science, Graduate School of Engineering Science , Osaka University , Toyonaka , Osaka 560-8531 , Japan
- Department of Applied Chemistry, School of Science and Technology , Meiji University , 1-1-1 Higashimita, Tama-ku , Kawasaki , Kanagawa 214-8571 , Japan
- PRESTO, Japan Science and Technology Agency , 4-1-8, Honcho , Kawaguchi , Saitama 332-0012 , Japan
| | - Toru Ishikawa
- Division of Frontier Materials Science, Graduate School of Engineering Science , Osaka University , Toyonaka , Osaka 560-8531 , Japan
| | - Brandon E Hirsch
- Division of Molecular Imaging and Photonics, Department of Chemistry , KU Leuven , Celestijnenlaan 200F , 3001 Leuven , Belgium
| | - Yuki Kubo
- Division of Frontier Materials Science, Graduate School of Engineering Science , Osaka University , Toyonaka , Osaka 560-8531 , Japan
| | - Anton Brown
- Division of Molecular Imaging and Photonics, Department of Chemistry , KU Leuven , Celestijnenlaan 200F , 3001 Leuven , Belgium
| | - Samuel Eyley
- Renewable Materials and Nanotechnology Group, Department of Chemical Engineering , KU Leuven, Campus Kortrijk , Etienne Sabbelaan 53 , 8500 Kortrijk , Belgium
| | - Lakshya Daukiya
- Division of Molecular Imaging and Photonics, Department of Chemistry , KU Leuven , Celestijnenlaan 200F , 3001 Leuven , Belgium
| | - Wim Thielemans
- Renewable Materials and Nanotechnology Group, Department of Chemical Engineering , KU Leuven, Campus Kortrijk , Etienne Sabbelaan 53 , 8500 Kortrijk , Belgium
| | - Zhi Li
- Division of Molecular Imaging and Photonics, Department of Chemistry , KU Leuven , Celestijnenlaan 200F , 3001 Leuven , Belgium
| | - Peter Walke
- Division of Molecular Imaging and Photonics, Department of Chemistry , KU Leuven , Celestijnenlaan 200F , 3001 Leuven , Belgium
| | - Shingo Hirose
- Department of Applied Chemistry, School of Science and Technology , Meiji University , 1-1-1 Higashimita, Tama-ku , Kawasaki , Kanagawa 214-8571 , Japan
| | - Shingo Hashimoto
- Department of Applied Chemistry, School of Science and Technology , Meiji University , 1-1-1 Higashimita, Tama-ku , Kawasaki , Kanagawa 214-8571 , Japan
| | - Steven De Feyter
- Division of Molecular Imaging and Photonics, Department of Chemistry , KU Leuven , Celestijnenlaan 200F , 3001 Leuven , Belgium
| | - Yoshito Tobe
- Division of Frontier Materials Science, Graduate School of Engineering Science , Osaka University , Toyonaka , Osaka 560-8531 , Japan
- The Institute of Scientific and Industrial Research , Osaka University , Ibaraki , Osaka 567-0047 , Japan
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28
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Verstraete L, Smart J, Hirsch BE, De Feyter S. Unidirectional supramolecular self-assembly inside nanocorrals via in situ STM nanoshaving. Phys Chem Chem Phys 2018; 20:27482-27489. [PMID: 30358776 DOI: 10.1039/c8cp05316b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Self-assembly of an alkylated diacetylene derivative is spatially confined via in situ scanning tunneling microscopy (STM) nanoshaving inside covalently modified highly ordered pyrolytic graphite (CM-HOPG). In contrast to unconstrained self-assembly that occurs randomly along three thermodynamically equivalent surface lattice directions, spatially confined assemblies are shown to form along chosen substrate orientations. Experimental statistics suggest two mechanisms for breaking the rotational degeneracy of the surface. First, the assembly orientation is biased via lateral confinement inside nanocorrals that do not match the substrate symmetry. Second, an interaction between the assembling molecules and the STM tip during nanoshaving guides 2D crystal nucleation and growth. The results presented here open new possibilities to regulate and orient self-assembled architectures via in situ nanomechanical manipulation techniques and provide mechanistic insights into the process.
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Affiliation(s)
- Lander Verstraete
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven-University of Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.
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29
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Cui D, MacLeod JM, Rosei F. Probing functional self-assembled molecular architectures with solution/solid scanning tunnelling microscopy. Chem Commun (Camb) 2018; 54:10527-10539. [PMID: 30079923 DOI: 10.1039/c8cc04341h] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Over the past two decades, solution/solid STM has made clear contributions to our fundamental understanding of the thermodynamic and kinetic processes that occur in molecular self-assembly at surfaces. As the field matures, we provide an overview of how solution/solid STM is emerging as a tool to elucidate and guide the use of self-assembled molecular systems in practical applications, focusing on small molecule device engineering, molecular recognition and sensing and electronic modification of 2D materials.
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Affiliation(s)
- Daling Cui
- INRS-Energy, Materials and Telecommunications and Center for Self-Assembled Chemical Structures, Varennes, Quebec J3X 1S2, Canada.
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30
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Seibel J, Verstraete L, Hirsch BE, Bragança AM, De Feyter S. Biasing Enantiomorph Formation via Geometric Confinement: Nanocorrals for Chiral Induction at the Liquid–Solid Interface. J Am Chem Soc 2018; 140:11565-11568. [DOI: 10.1021/jacs.8b04992] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Johannes Seibel
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Lander Verstraete
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Brandon E. Hirsch
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Ana M. Bragança
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Steven De Feyter
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
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31
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Bilbao N, Yu Y, Verstraete L, Lin J, Lei S, De Feyter S. The impact of grafted surface defects on the on-surface Schiff-base chemistry at the solid-liquid interface. Chem Commun (Camb) 2018; 54:9905-9908. [PMID: 30123916 DOI: 10.1039/c8cc03867h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We investigate the effect of covalently modified graphitic surfaces on the formation of single-layer covalent organic frameworks (sCOFs) at the solid-liquid interface. The impact of different densities of grafted aryl species was tested on the on-surface synthesis of three distinct imine-based 2D sCOFs. The grafted aryl species that act as defects provide steric barriers to the progress of the Schiff-base reaction, and can be locally removed to start the 2D polymer healing process. This unique strategy provides a general approach to study in situ this dynamic covalent on-surface chemistry.
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Affiliation(s)
- Nerea Bilbao
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven - University of Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.
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32
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Goronzy DP, Ebrahimi M, Rosei F, Fang Y, De Feyter S, Tait SL, Wang C, Beton PH, Wee ATS, Weiss PS, Perepichka DF. Supramolecular Assemblies on Surfaces: Nanopatterning, Functionality, and Reactivity. ACS NANO 2018; 12:7445-7481. [PMID: 30010321 DOI: 10.1021/acsnano.8b03513] [Citation(s) in RCA: 147] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Understanding how molecules interact to form large-scale hierarchical structures on surfaces holds promise for building designer nanoscale constructs with defined chemical and physical properties. Here, we describe early advances in this field and highlight upcoming opportunities and challenges. Both direct intermolecular interactions and those that are mediated by coordinated metal centers or substrates are discussed. These interactions can be additive, but they can also interfere with each other, leading to new assemblies in which electrical potentials vary at distances much larger than those of typical chemical interactions. Earlier spectroscopic and surface measurements have provided partial information on such interfacial effects. In the interim, scanning probe microscopies have assumed defining roles in the field of molecular organization on surfaces, delivering deeper understanding of interactions, structures, and local potentials. Self-assembly is a key strategy to form extended structures on surfaces, advancing nanolithography into the chemical dimension and providing simultaneous control at multiple scales. In parallel, the emergence of graphene and the resulting impetus to explore 2D materials have broadened the field, as surface-confined reactions of molecular building blocks provide access to such materials as 2D polymers and graphene nanoribbons. In this Review, we describe recent advances and point out promising directions that will lead to even greater and more robust capabilities to exploit designer surfaces.
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Affiliation(s)
- Dominic P Goronzy
- California NanoSystems Institute , University of California, Los Angeles , Los Angeles , California 90095 , United States
- Department of Chemistry and Biochemistry , University of California, Los Angeles , Los Angeles , California 90095 , United States
| | - Maryam Ebrahimi
- INRS Centre for Energy, Materials and Telecommunications , 1650 Boul. Lionel Boulet , Varennes , Quebec J3X 1S2 , Canada
| | - Federico Rosei
- INRS Centre for Energy, Materials and Telecommunications , 1650 Boul. Lionel Boulet , Varennes , Quebec J3X 1S2 , Canada
- Institute for Fundamental and Frontier Science , University of Electronic Science and Technology of China , Chengdu 610054 , P.R. China
| | - Yuan Fang
- Department of Chemistry , McGill University , Montreal H3A 0B8 , Canada
| | - Steven De Feyter
- Department of Chemistry , KU Leuven , Celestijnenlaan 200F , Leuven 3001 , Belgium
| | - Steven L Tait
- Department of Chemistry , Indiana University , Bloomington , Indiana 47405 , United States
| | - Chen Wang
- National Center for Nanoscience and Technology , Beijing 100190 , China
| | - Peter H Beton
- School of Physics & Astronomy , University of Nottingham , Nottingham NG7 2RD , United Kingdom
| | - Andrew T S Wee
- Department of Physics , National University of Singapore , 117542 Singapore
| | - Paul S Weiss
- California NanoSystems Institute , University of California, Los Angeles , Los Angeles , California 90095 , United States
- Department of Chemistry and Biochemistry , University of California, Los Angeles , Los Angeles , California 90095 , United States
- Department of Materials Science and Engineering , University of California, Los Angeles , Los Angeles , California 90095 , United States
| | - Dmitrii F Perepichka
- California NanoSystems Institute , University of California, Los Angeles , Los Angeles , California 90095 , United States
- Department of Chemistry , McGill University , Montreal H3A 0B8 , Canada
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33
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Van Gorp H, Walke P, Bragança AM, Greenwood J, Ivasenko O, Hirsch BE, De Feyter S. Self-Assembled Polystyrene Beads for Templated Covalent Functionalization of Graphitic Substrates Using Diazonium Chemistry. ACS APPLIED MATERIALS & INTERFACES 2018; 10:12005-12012. [PMID: 29485850 DOI: 10.1021/acsami.7b18969] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A network of self-assembled polystyrene beads was employed as a lithographic mask during covalent functionalization reactions on graphitic surfaces to create nanocorrals for confined molecular self-assembly studies. The beads were initially assembled into hexagonal arrays at the air-liquid interface and then transferred to the substrate surface. Subsequent electrochemical grafting reactions involving aryl diazonium molecules created covalently bound molecular units that were localized in the void space between the nanospheres. Removal of the bead template exposed hexagonally arranged circular nanocorrals separated by regions of chemisorbed molecules. Small molecule self-assembly was then investigated inside the resultant nanocorrals using scanning tunneling microscopy to highlight localized confinement effects. Overall, this work illustrates the utility of self-assembly principles to transcend length scale gaps in the development of hierarchically patterned molecular materials.
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Affiliation(s)
- Hans Van Gorp
- Division of Molecular Imaging and Photonics, Department of Chemistry , KU Leuven , Celestijnenlaan 200F , B3001 Leuven , Belgium
| | - Peter Walke
- Division of Molecular Imaging and Photonics, Department of Chemistry , KU Leuven , Celestijnenlaan 200F , B3001 Leuven , Belgium
| | - Ana M Bragança
- Division of Molecular Imaging and Photonics, Department of Chemistry , KU Leuven , Celestijnenlaan 200F , B3001 Leuven , Belgium
| | - John Greenwood
- Division of Molecular Imaging and Photonics, Department of Chemistry , KU Leuven , Celestijnenlaan 200F , B3001 Leuven , Belgium
| | - Oleksandr Ivasenko
- Division of Molecular Imaging and Photonics, Department of Chemistry , KU Leuven , Celestijnenlaan 200F , B3001 Leuven , Belgium
| | - Brandon E Hirsch
- Division of Molecular Imaging and Photonics, Department of Chemistry , KU Leuven , Celestijnenlaan 200F , B3001 Leuven , Belgium
| | - Steven De Feyter
- Division of Molecular Imaging and Photonics, Department of Chemistry , KU Leuven , Celestijnenlaan 200F , B3001 Leuven , Belgium
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34
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Verstraete L, Hirsch BE, Greenwood J, De Feyter S. Confined polydiacetylene polymerization reactions for programmed length control. Chem Commun (Camb) 2018; 53:4207-4210. [PMID: 28287236 DOI: 10.1039/c7cc00885f] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Polydiacetylene polymers of defined lengths are formed from self-assembled precursors inside nanocorrals created within grafted graphite substrates. A scanning tunneling microscope tip is used to nanoshave corrals at the liquid-solid interface allowing orientationally controlled supramolecular self-assembly of linear diacetylene molecules. Electrical pulses trigger topological one-dimensional polymerization reactions that are confined by the nanocorral template dimensions.
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Affiliation(s)
- Lander Verstraete
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven - University of Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.
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35
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Hong L, Nishihara T, Hijikata Y, Miyauchi Y, Itami K. Unidirectional molecular assembly alignment on graphene enabled by nanomechanical symmetry breaking. Sci Rep 2018; 8:2333. [PMID: 29402969 PMCID: PMC5799215 DOI: 10.1038/s41598-018-20760-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 01/23/2018] [Indexed: 11/10/2022] Open
Abstract
Precise fabrication of molecular assemblies on a solid surface has long been of central interest in surface science. Their perfectly oriented growth only along a desired in-plane direction, however, remains a challenge, because of the thermodynamical equivalence of multiple axis directions on a solid-surface lattice. Here we demonstrate the successful fabrication of an in-plane, unidirectional molecular assembly on graphene. Our methodology relies on nanomechanical symmetry breaking effects under atomic force microscopy tip scanning, which has never been used in molecular alignment. Individual one-dimensional (1D) molecular assemblies were aligned along a selected symmetry axis of the graphene lattice under finely-tuned scanning conditions after removing initially-adsorbed molecules. Experimental statistics and computational simulations suggest that the anisotropic tip scanning locally breaks the directional equivalence of the graphene surface, which enables nucleation of the unidirectional 1D assemblies. Our findings will open new opportunities in the molecular alignment control on various atomically flat surfaces.
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Affiliation(s)
- Liu Hong
- JST-ERATO, Itami Molecular Nanocarbon Project, Nagoya University, Chikusa, Nagoya, 464-8602, Japan.,Graduate School of Science, Nagoya University, Chikusa, Nagoya, 464-8602, Japan.,School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China
| | - Taishi Nishihara
- JST-ERATO, Itami Molecular Nanocarbon Project, Nagoya University, Chikusa, Nagoya, 464-8602, Japan.,Graduate School of Science, Nagoya University, Chikusa, Nagoya, 464-8602, Japan
| | - Yuh Hijikata
- Graduate School of Science, Nagoya University, Chikusa, Nagoya, 464-8602, Japan.,Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Chikusa, Nagoya, 464-8602, Japan
| | - Yuhei Miyauchi
- JST-ERATO, Itami Molecular Nanocarbon Project, Nagoya University, Chikusa, Nagoya, 464-8602, Japan. .,Graduate School of Science, Nagoya University, Chikusa, Nagoya, 464-8602, Japan. .,Institute of Advanced Energy, Kyoto University, Uji, Kyoto, 611-0011, Japan.
| | - Kenichiro Itami
- JST-ERATO, Itami Molecular Nanocarbon Project, Nagoya University, Chikusa, Nagoya, 464-8602, Japan. .,Graduate School of Science, Nagoya University, Chikusa, Nagoya, 464-8602, Japan. .,Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Chikusa, Nagoya, 464-8602, Japan.
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36
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Samperi M, Hirsch BE, Diaz Fernandez YA. Exploring the science of thinking independently together: Faraday Discussion Volume 204 - Complex Molecular Surfaces and Interfaces, Sheffield, UK, July 2017. Chem Commun (Camb) 2017; 53:12601-12607. [PMID: 29139496 DOI: 10.1039/c7cc90389h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The 2017 Faraday Discussion on Complex Molecular Surfaces and Interfaces brought together theoreticians and experimentalists from both physical and chemical backgrounds to discuss the relevant applied and fundamental research topics within the broader field of chemical surface analysis and characterization. Main discussion topics from the meeting included the importance of "disordered" two-dimensional (2D) molecular structures and the utility of kinetically trapped states. An emerging need for new experimental tools to address dynamics and kinetic pathways involved in self-assembled systems, as well as the future prospects and current limitations of in silico studies were also discussed. The following article provides a brief overview of the work presented and the challenges discussed during the meeting.
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Affiliation(s)
- M Samperi
- GSK Carbon Neutral Laboratories for Sustainable Chemistry, The University of Nottingham, Triumph Road, NG7 2TU, UK.
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37
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Mali KS, Pearce N, De Feyter S, Champness NR. Frontiers of supramolecular chemistry at solid surfaces. Chem Soc Rev 2017; 46:2520-2542. [DOI: 10.1039/c7cs00113d] [Citation(s) in RCA: 168] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Supramolecular chemistry on solid surfaces represents an exciting field of research that continues to develop in new and unexpected directions.
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Affiliation(s)
- Kunal S. Mali
- Division of Molecular Imaging and Photonics
- Department of Chemistry
- KU Leuven – University of Leuven
- B3001 Leuven
- Belgium
| | | | - Steven De Feyter
- Division of Molecular Imaging and Photonics
- Department of Chemistry
- KU Leuven – University of Leuven
- B3001 Leuven
- Belgium
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38
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Breton T, Downard AJ. Controlling Grafting from Aryldiazonium Salts: A Review of Methods for the Preparation of Monolayers. Aust J Chem 2017. [DOI: 10.1071/ch17262] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Surface modification by grafting from aryldiazonium salts has been widely studied and applied to many substrates as a simple and versatile method for preparing strongly adherent organic coatings. Unless special precautions or conditions are used, the usual film structure is a loosely packed disordered multilayer; however, over the past decade, attention has been paid to establishing strategies for grafting just a monolayer of modifiers to the surface. To date, four general approaches to monolayer preparation have emerged: use of aryldiazonium ions with cleavable protection groups; use of aryldiazonium ions with steric constraints; grafting in the presence of a radical scavenger; and grafting from ionic liquids. This review describes these approaches, illustrates some of their applications, and highlights the advantages and disadvantages of each.
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