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Pujol AR, Bataillé S, Gourdon A. Functional Molecules for Grafting onto Ionic Surfaces. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501077] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Kalashnyk N, Ganesh Nagaswaran P, Kervyn S, Riello M, Moreton B, Jones TS, De Vita A, Bonifazi D, Costantini G. Self-assembly of decoupled borazines on metal surfaces: the role of the peripheral groups. Chemistry 2014; 20:11856-62. [PMID: 25079120 PMCID: PMC4449113 DOI: 10.1002/chem.201402839] [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: 03/30/2014] [Indexed: 11/11/2022]
Abstract
Two borazine derivatives have been synthesised to investigate their self-assembly behaviour on Au(111) and Cu(111) surfaces by scanning tunnelling microscopy (STM) and theoretical simulations. Both borazines form extended 2D networks upon adsorption on both substrates at room temperature. Whereas the more compact triphenyl borazine 1 arranges into close-packed ordered molecular islands with an extremely low density of defects on both substrates, the tris(phenyl-4-phenylethynyl) derivative 2 assembles into porous molecular networks due to its longer lateral substituents. For both species, the steric hindrance between the phenyl and mesityl substituents results in an effective decoupling of the central borazine core from the surface. For borazine 1, this is enough to weaken the molecule-substrate interaction, so that the assemblies are only driven by attractive van der Waals intermolecular forces. For the longer and more flexible borazine 2, a stronger molecule-substrate interaction becomes possible through its peripheral substituents on the more reactive copper surface.
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Affiliation(s)
- Nataliya Kalashnyk
- Department of Chemistry, University of WarwickGibbet Hill Road, Coventry, CV4 7AL (UK)
| | - Praveen Ganesh Nagaswaran
- Namur Research College (NARC) and Department of Chemistry, University of Namur (UNamur)Rue de Bruxelles 61, 5000 Namur (Belgium)
| | - Simon Kervyn
- Namur Research College (NARC) and Department of Chemistry, University of Namur (UNamur)Rue de Bruxelles 61, 5000 Namur (Belgium)
| | - Massimo Riello
- Physics Department, King's College LondonLondon, WC2R 2LS (UK)
| | - Ben Moreton
- Department of Chemistry, University of WarwickGibbet Hill Road, Coventry, CV4 7AL (UK)
| | - Tim S Jones
- Department of Chemistry, University of WarwickGibbet Hill Road, Coventry, CV4 7AL (UK)
| | | | - Davide Bonifazi
- Namur Research College (NARC) and Department of Chemistry, University of Namur (UNamur)Rue de Bruxelles 61, 5000 Namur (Belgium)
- Department of Pharmaceutical and Chemical Sciences and INSTM UdR Trieste, University of TriestePiazzale Europa 1, 34127 Trieste (Italy)
| | - Giovanni Costantini
- Department of Chemistry, University of WarwickGibbet Hill Road, Coventry, CV4 7AL (UK)
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Nony L, Bocquet F, Para F, Chérioux F, Duverger E, Palmino F, Luzet V, Loppacher C. Dipole-driven self-organization of zwitterionic molecules on alkali halide surfaces. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2012; 3:285-93. [PMID: 22497002 PMCID: PMC3323918 DOI: 10.3762/bjnano.3.32] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2011] [Accepted: 02/17/2012] [Indexed: 05/31/2023]
Abstract
We investigated the adsorption of 4-methoxy-4'-(3-sulfonatopropyl)stilbazolium (MSPS) on different ionic (001) crystal surfaces by means of noncontact atomic force microscopy. MSPS is a zwitterionic molecule with a strong electric dipole moment. When deposited onto the substrates at room temperature, MSPS diffuses to step edges and defect sites and forms disordered assemblies of molecules. Subsequent annealing induces two different processes: First, at high coverage, the molecules assemble into a well-organized quadratic lattice, which is perfectly aligned with the <110> directions of the substrate surface (i.e., rows of equal charges) and which produces a Moiré pattern due to coincidences with the substrate lattice constant. Second, at low coverage, we observe step edges decorated with MSPS molecules that run along the <110> direction. These polar steps most probably minimize the surface energy as they counterbalance the molecular dipole by presenting oppositely charged ions on the rearranged step edge.
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Affiliation(s)
- Laurent Nony
- Aix-Marseille Univ, IM2NP, Faculté des Sciences de St. Jérome, F-13397 Marseille France; CNRS, IM2NP, Faculté des Sciences de St. Jérome, F-13397 Marseille France
| | - Franck Bocquet
- Aix-Marseille Univ, IM2NP, Faculté des Sciences de St. Jérome, F-13397 Marseille France; CNRS, IM2NP, Faculté des Sciences de St. Jérome, F-13397 Marseille France
| | - Franck Para
- Aix-Marseille Univ, IM2NP, Faculté des Sciences de St. Jérome, F-13397 Marseille France; CNRS, IM2NP, Faculté des Sciences de St. Jérome, F-13397 Marseille France
| | - Frédéric Chérioux
- Institut FEMTO-ST, Université de Franche-Comté, CNRS, ENSMM, 32, Avenue de l’Observatoire, F-25044 Besancon Cedex, France
| | - Eric Duverger
- Institut FEMTO-ST, Université de Franche-Comté, CNRS, ENSMM, 32, Avenue de l’Observatoire, F-25044 Besancon Cedex, France
| | - Frank Palmino
- Institut FEMTO-ST, Université de Franche-Comté, CNRS, ENSMM, 32, Avenue de l’Observatoire, F-25044 Besancon Cedex, France
| | - Vincent Luzet
- Institut FEMTO-ST, Université de Franche-Comté, CNRS, ENSMM, 32, Avenue de l’Observatoire, F-25044 Besancon Cedex, France
| | - Christian Loppacher
- Aix-Marseille Univ, IM2NP, Faculté des Sciences de St. Jérome, F-13397 Marseille France; CNRS, IM2NP, Faculté des Sciences de St. Jérome, F-13397 Marseille France
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Joachim C, Martrou D, Rezeq M, Troadec C, Jie D, Chandrasekhar N, Gauthier S. Multiple atomic scale solid surface interconnects for atom circuits and molecule logic gates. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:084025. [PMID: 21389401 DOI: 10.1088/0953-8984/22/8/084025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The scientific and technical challenges involved in building the planar electrical connection of an atomic scale circuit to N electrodes (N > 2) are discussed. The practical, laboratory scale approach explored today to assemble a multi-access atomic scale precision interconnection machine is presented. Depending on the surface electronic properties of the targeted substrates, two types of machines are considered: on moderate surface band gap materials, scanning tunneling microscopy can be combined with scanning electron microscopy to provide an efficient navigation system, while on wide surface band gap materials, atomic force microscopy can be used in conjunction with optical microscopy. The size of the planar part of the circuit should be minimized on moderate band gap surfaces to avoid current leakage, while this requirement does not apply to wide band gap surfaces. These constraints impose different methods of connection, which are thoroughly discussed, in particular regarding the recent progress in single atom and molecule manipulations on a surface.
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Affiliation(s)
- C Joachim
- Centre d'Elaboration de Matériaux et d'Etudes Structurales (CEMES-CNRS) 29, rue Jeanne Marvig, BP 94347, 31055 Toulouse Cedex 4, France. Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, 117602, Singapore
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Bombis C, Ample F, Lafferentz L, Yu H, Hecht S, Joachim C, Grill L. Single Molecular Wires Connecting Metallic and Insulating Surface Areas. Angew Chem Int Ed Engl 2009; 48:9966-70. [PMID: 19950152 DOI: 10.1002/anie.200904645] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Christian Bombis
- Experimental Physics Department, Freie Universität Berlin and Fritz-Haber-Institut of the Max-Planck-Society, 14195 Berlin, Germany
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Bombis C, Ample F, Lafferentz L, Yu H, Hecht S, Joachim C, Grill L. Einzelne molekulare Drähte verbinden metallische und isolierende Oberflächenbereiche. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200904645] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Burke SA, Topple JM, Grütter P. Molecular dewetting on insulators. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2009; 21:423101. [PMID: 21715835 DOI: 10.1088/0953-8984/21/42/423101] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Recent attention given to the growth and morphology of organic thin films with regard to organic electronics has led to the observation of dewetting (a transition from layer(s) to islands) of molecular deposits in many of these systems. Dewetting is a much studied phenomenon in the formation of polymer and liquid films, but its observation in thin films of the 'small' molecules typical of organic electronics requires additional consideration of the structure of the interface between the molecular film and the substrate. This review covers some key concepts related to dewetting and molecular film growth. In particular, the origins of different growth modes and the thickness dependent interactions which give rise to dewetting are discussed in terms of surface energies and the disjoining pressure. Characteristics of molecular systems which may lead to these conditions, including the formation of metastable interface structures and commensurate-incommensurate phase transitions, are also discussed. Brief descriptions of some experimental techniques which have been used to study molecular dewetting are given as well. Examples of molecule-on-insulator systems which undergo dewetting are described in some detail, specifically perylene derivatives on alkali halides, C(60) on alkali halides, and the technologically important system of pentacene on SiO(2). These examples point to some possible predicting factors for the occurrence of dewetting, most importantly the formation of an interface layer which differs from the bulk crystal structure.
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Affiliation(s)
- S A Burke
- Department of Physics, University of California Berkeley, Berkeley, CA, USA
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