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Ordering a rhenium catalyst on Ag(001) through molecule-surface step interaction. Commun Chem 2022; 5:3. [PMID: 36697683 PMCID: PMC9814538 DOI: 10.1038/s42004-021-00617-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 12/03/2021] [Indexed: 01/28/2023] Open
Abstract
Atomic scale studies of the anchoring of catalytically active complexes to surfaces may provide valuable insights for the design of new catalytically active hybrid systems. In this work, the self-assembly of 1D, 2D and 3D structures of the complex fac-Re(bpy)(CO)3Cl (bpy = 2,2'-bipyridine), a CO2 reduction catalyst, on the Ag(001) surface are studied by a combination of low-temperature scanning tunneling microscopy and density functional theory calculations. Infrared and sum frequency generation spectroscopy confirm that the complex remains chemically intact under sublimation. Deposition of the complexes onto the silver surface at 300 K leads to strong local variations in the resulting surface coverage on the nanometer scale, indicating that in the initial phase of deposition a large fraction of the molecules is desorbing from the surface. Low coverage regions show a decoration of step edges aligned along the crystal's symmetry axes <110>. These crystallographic directions are found to be of major importance to the binding of the complexes to the surface. Moreover, the interaction between the molecules and the substrate promotes the restructuring of surface steps along these directions. Well-aligned and decorated steps are found to act as nucleation point for monolayer growth (2D) before 3D growth starts.
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2
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Godlewski S, Tekiel A, Prauzner-Bechcicki JS, Budzioch J, Gourdon A, Szymonski M. Adsorption of organic molecules on the TiO2(011) surface: STM study. J Chem Phys 2011; 134:224701. [DOI: 10.1063/1.3593403] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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3
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Trevethan T, Such B, Glatzel T, Kawai S, Shluger AL, Meyer E, de Mendoza P, Echavarren AM. Organic molecules reconstruct nanostructures on ionic surfaces. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2011; 7:1264-70. [PMID: 21485005 DOI: 10.1002/smll.201001910] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2010] [Revised: 12/08/2010] [Indexed: 05/22/2023]
Abstract
Modification and functionalization of the atomic-scale structure of insulating surfaces is fundamental to catalysis, self-assembly, and single-molecule technologies. Specially designed syn-5,10,15-tris(4-cyanophenylmethyl)truxene molecules can reshape features on an ionic KBr (001) surface. Atomic force microscopy images demonstrate that both KBr monolayer islands and pits can reshape from rectangular to round structures, a process which is directly facilitated by molecular adsorption. Simulations reveal that the mechanism of the surface reconstruction consists of collective atomic hops of ions on the step edges of the islands and pits, which correlate with molecular motion. The energy barriers for individual processes are reduced by the presence of the adsorbed molecules, which cause surface structural changes. These results show how appropriately designed organic molecules can modify surface morphology on insulating surfaces. Such strongly adsorbed molecules can also serve as anchoring sites for building new nanostructures on inert insulating surfaces.
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Affiliation(s)
- Thomas Trevethan
- Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
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4
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Sato F, Legoas SB, Otero R, Hümmelink F, Thostrup P, Lægsgaard E, Stensgaard I, Besenbacher F, Galvão DS. Adsorption configuration effects on the surface diffusion of large organic molecules: the case of Violet Lander. J Chem Phys 2010; 133:224702. [PMID: 21171691 DOI: 10.1063/1.3512623] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Violet Lander (C(108)H(104)) is a large organic molecule that when deposited on Cu(110) surface exhibits lock-and-key like behavior [Otero et al., Nature Mater. 3, 779 (2004)]. In this work, we report a detailed fully atomistic molecular mechanics and molecular dynamics study of this phenomenon. Our results show that it has its physical basis on the interplay of the molecular hydrogens and the Cu(110) atomic spacing, which is a direct consequence of the matching between molecule and surface dimensions. This information could be used to find new molecules capable of displaying lock-and-key behavior with new potential applications in nanotechnology.
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Affiliation(s)
- F Sato
- Departamento de Física, ICE, Universidade Federal de Juiz de Fora, 36036-330 Juiz de Fora-MG, Brazil
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Kung YH, Cheng YS, Tai CC, Liu WS, Shin CC, Ma CC, Tsai YC, Wu TC, Kuo MY, Wu YT. Synthesis, Structures, and Physical Properties of Benzo[k]fluoranthene-Based Linear Acenes. Chemistry 2010; 16:5909-19. [DOI: 10.1002/chem.200902695] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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6
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Grill L. Large molecules on surfaces: deposition and intramolecular STM manipulation by directional forces. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:084023. [PMID: 21389399 DOI: 10.1088/0953-8984/22/8/084023] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Intramolecular manipulation of single molecules on a surface with a scanning tunnelling microscope enables the controlled modification of their structure and, consequently, their physical and chemical properties. This review presents examples of intramolecular manipulation experiments with rather large molecules, driven by directional, i.e. chemical or electrostatic, forces between tip and molecule. It is shown how various regimes of forces can be explored and characterized with one and the same manipulation of a single molecule by changing the tip-surface distance. Furthermore, different deposition techniques under ultrahigh vacuum conditions are discussed because the increasing functionality of such molecules can lead to fragmentation during the heating step, making their clean deposition difficult.
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Affiliation(s)
- Leonhard Grill
- Physics Department, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany. Fritz-Haber-Institut of the Max-Planck-Society, Faradayweg 4-6, 14195 Berlin, Germany
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Godlewski S, Tekiel A, Budzioch J, Gourdon A, Prauzner-Bechcicki JS, Szymonski M. Adsorption of large organic molecules on clean and hydroxylated rutile TiO2(110) surfaces. Chemphyschem 2010; 10:3278-84. [PMID: 19839023 DOI: 10.1002/cphc.200900606] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Behavior of large organic molecules equipped with spacer groups (Violet Landers, VL) on the TiO(2)(110)-(1x1) surfaces is investigated by means of high-resolution scanning tunneling microscopy (STM). Two distinct adsorption geometries are observed. We demonstrate that the molecule adsorption morphology can be alternated by well-controlled STM tip-induced manipulation. It is used to probe the mobility of molecules and reveals locking in one of the analyzed adsorption sites, thus allow to enhance or reduce the mobility along the [001] direction. Field induced hydrogen desorption is used to perform lateral STM manipulation on a hydroxyl-free surface, which provides insight into the influence of surface hydroxyl groups on the molecule behavior. The ability to image with submolecular resolution both the central board and the spacer groups of the VL molecule is demonstrated.
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Affiliation(s)
- Szymon Godlewski
- Centre for Nanometer-Scale Science and Advanced Materials (NANOSAM), Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Reymonta 4, 30-059 Krakow, Poland.
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8
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Godlewski S, Goryl G, Gourdon A, Kolodziej JJ, Such B, Szymonski M. Internal architecture and adsorption sites of Violet Lander molecules assembled on native and KBr-passivated InSb(001) surfaces. Chemphyschem 2009; 10:2026-33. [PMID: 19472264 DOI: 10.1002/cphc.200900128] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The adsorption of individual Violet Lander molecules self-assembled on the c(8x2) reconstructed InSb(001) surface in its native form and on the surface passivated with one to three monolayers of KBr is investigated by means of low-temperature scanning tunneling microscopy (STM). Preferred adsorption sites of the molecules are found on flat terraces as well as at atomic step edges. For molecules immobilized on flat terraces, several different conformations are identified from STM images acquired with submolecular resolution and are explained by the rotation of the 3,5-di-tert-butylphenyl groups around sigma bonds, which allows adjustment of the molecular geometry to the anisotropic substrate structure. Formation of ordered molecular chains is found at steps running along substrate reconstruction rows, whereas at the steps oriented perpendicularly no intermolecular ordering is recorded. It is also shown that the molecules deposited at two or more monolayers of the epitaxial KBr spacer do not have any stable adsorption sites recorded with STM. Prospects for the manipulation of single molecules by using the STM tip on highly anisotropic substrates are also explored, and demonstrate the feasibility of controlled lateral displacement in all directions.
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Affiliation(s)
- Szymon Godlewski
- Centre for Nanometer-Scale Science and Advanced Materials, NANOSAM, Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Krakow, Poland
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9
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Michl J, Sykes ECH. Molecular rotors and motors: recent advances and future challenges. ACS NANO 2009; 3:1042-1048. [PMID: 19845364 DOI: 10.1021/nn900411n] [Citation(s) in RCA: 190] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
At the "Molecular Rotors and Motors" symposium of the Spring 2009 ACS National Meeting in Salt Lake City (March 22-26), a diverse mix of talks addressed many current issues in the field. Speakers described topics that varied from single-molecule rotors and nanomachines to exquisite synthetic approaches toward building functional materials and mathematical and computational methods aimed at uncovering design opportunities and highlighting the fundamental limitations of molecular motors. While the realization of building useful nanomachines remains far off, a general consensus abounded that investigating biological systems and understanding the implications of the laws of thermodynamics and quantum mechanics for the behavior of nanostructures will help drive important advances in the quest for molecular machinery. Molecular rotors were demonstrated to have practical applications as probes for microviscosity, and many speakers presented experimental studies that indicated that highly directed translation and rotation of individual molecules, as well as interacting dipolar arrays, are just around the corner. While this Nano Focus is not intended to be a comprehensive review of the subject, it will focus on several key advances that were presented at the ACS meeting and highlight future challenges for the field of molecular rotors and motors.
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Affiliation(s)
- Josef Michl
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215, USA
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11
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Moore AM, Weiss PS. Functional and spectroscopic measurements with scanning tunneling microscopy. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2008; 1:857-882. [PMID: 20636100 DOI: 10.1146/annurev.anchem.1.031207.112932] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Invented as a surface analytical technique capable of imaging individual atoms and molecules in real space, scanning tunneling microscopy (STM) has developed and advanced into a technique able to measure a variety of structural, functional, and spectroscopic properties and relationships at the single-molecule level. Here, we review basic STM operation and image interpretation, techniques developed to manipulate single atoms and molecules with the STM to measure functional properties of surfaces, local spectroscopies used to characterize atoms and molecules at the single-molecule level, and surface perturbations affecting surface coverage and surface reactions. Each section focuses on determining the identity and function of chemical species so as to elucidate information beyond topography with STM.
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Affiliation(s)
- Amanda M Moore
- Department of Chemistry, Pennsylvania State University, University Park, 16802, USA
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12
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Wesoloski LM, Stieg AZ, Kunitake M, Dultz SC, Gimzewski JK. Observations of image contrast and dimerization of decacyclene by low temperature scanning tunneling microscopy. J Chem Phys 2007; 127:174703. [DOI: 10.1063/1.2799991] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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13
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Basu C, Barthes C, Sadhukhan SK, Girdhar NK, Gourdon A. Synthesis of a 2D Lander. European J Org Chem 2007. [DOI: 10.1002/ejoc.200600675] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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14
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Du SX, Gao HJ, Seidel C, Tsetseris L, Ji W, Kopf H, Chi LF, Fuchs H, Pennycook SJ, Pantelides ST. Selective nontemplated adsorption of organic molecules on nanofacets and the role of bonding patterns. PHYSICAL REVIEW LETTERS 2006; 97:156105. [PMID: 17155345 DOI: 10.1103/physrevlett.97.156105] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2006] [Indexed: 05/12/2023]
Abstract
A key element of functionalizing nanocrystals with organic molecules is the nontemplated selective adsorption of different molecules on different facets. Here we report scanning-tunneling-microscopy images of perylene-3,4,9,10-tetracarboxylic-dianhydride and 2,5-dimethyl-N,N'-dicyanoquinonediimine on silver, demonstrating selective adsorption on different facets. We also report first-principles calculations that account for the data and show that bonding, which controls selectivity, occurs via the end atoms, while the molecule's midregion arches away from the substrate. The results are also consistent with data that have been interpreted in terms of bonding via the midregion.
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Affiliation(s)
- S X Du
- National Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080, China
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15
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Savio L, Gross L, Rieder KH, Gourdon A, Joachim C, Moresco F. Interaction of a long molecular wire with a nanostructured surface: Violet Landers on Cu(211). Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.07.034] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Otero R, Rosei F, Besenbacher F. SCANNING TUNNELING MICROSCOPY MANIPULATION OF COMPLEX ORGANIC MOLECULES ON SOLID SURFACES. Annu Rev Phys Chem 2006; 57:497-525. [PMID: 16599819 DOI: 10.1146/annurev.physchem.57.032905.104634] [Citation(s) in RCA: 106] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Organic molecules adsorbed on solid surfaces display a fascinating variety of new physical and chemical phenomena ranging from self-assembly and molecular recognition to nonlinear optical properties and current rectification. Both the fundamental interest in these systems and the promise of technological applications have motivated a strong research effort in understanding and controlling these properties. Scanning tunneling microscopy (STM) and, in particular, its ability to manipulate individual adsorbed molecules, has become a powerful tool for studying the adsorption geometry and the conformation and dynamics of single molecules and molecular aggregates. Here we review selected case studies demonstrating the enormous capabilities of STM manipulations to explore basic physiochemical properties of adsorbed molecules. In particular, we emphasize the role of STM manipulations in studying the coupling between the multiple degrees of freedom of adsorbed molecules, the phenomenon of molecular molding, and the possibility of creating and breaking individual chemical bonds in a controlled manner, i.e., the concept of single-molecule chemistry.
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Affiliation(s)
- Roberto Otero
- Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
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17
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Gross L, Rieder KH, Moresco F, Stojkovic SM, Gourdon A, Joachim C. Trapping and moving metal atoms with a six-leg molecule. NATURE MATERIALS 2005; 4:892-5. [PMID: 16299509 DOI: 10.1038/nmat1529] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2005] [Accepted: 10/04/2005] [Indexed: 05/05/2023]
Abstract
Putting to work a molecule able to collect and carry adatoms in a controlled way on a surface is a solution for fabricating atomic structures atom by atom. Investigations have shown that the interaction of an organic molecule with the surface of a metal can induce surface reconstruction down to the atomic scale. In this way, well-defined nanostructures such as chains of adatoms, atomic trenches and metal-ligand compounds have been formed. Moreover, the progress in manipulation techniques induced by a scanning tunnelling microscope (STM) has opened up the possibility of studying artificially built molecular-metal atomic scale structures, and allowed the atom-by-atom doping of a single C(60) molecule by picking up K atoms. The present work goes a step further and combines STM manipulation techniques with the ability of a molecule to assemble an atomic nanostructure. We present a well-designed six-leg single hexa-t-butyl-hexaphenylbenzene (HB-HPB) molecule, which collects and carries up to six copper adatoms on a Cu(111) surface when manipulated with a STM tip. The 'HB-HPB-Cu atoms' complex can be further manipulated, bringing its Cu freight to a predetermined position on the surface where the metal atoms can finally be released.
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Affiliation(s)
- Leo Gross
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
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18
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Kwon KY, Wong KL, Pawin G, Bartels L, Stolbov S, Rahman TS. Unidirectional adsorbate motion on a high-symmetry surface: "walking" molecules can stay the course. PHYSICAL REVIEW LETTERS 2005; 95:166101. [PMID: 16241817 DOI: 10.1103/physrevlett.95.166101] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2005] [Indexed: 05/05/2023]
Abstract
Step edges and low-symmetry faces of metal crystals can restrict the diffusive motion of adsorbates, yet they offer little flexibility with regards to the location and/or direction of the guided motion. We show inherently unidirectional motion of an organic molecule on a high-symmetry thermodynamic-equilibrium metal surface [Cu(111)]. Sequential placement of the substrate linkers of 9,10-dithioanthracene prevents it from rotating or veering off course. A combination of low temperature scanning tunneling microscopy and density functional theory simulations provide atomistic insight.
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Affiliation(s)
- Ki-Young Kwon
- Pierce Hall, University of California, Riverside, 92521, USA
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19
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Moresco F, Gourdon A. Scanning tunneling microscopy experiments on single molecular landers. Proc Natl Acad Sci U S A 2005; 102:8809-14. [PMID: 15956190 PMCID: PMC1157026 DOI: 10.1073/pnas.0500915102] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2005] [Indexed: 11/18/2022] Open
Abstract
Molecular landers are molecules comprising of a central rigid molecular wire maintained above a metallic surface by organic spacers, which allows specific ultrahigh vacuum-scanning tunneling microscopy experiments to be performed at the single-molecule level. The understanding of the molecule-surface interactions, intramolecular mechanics, and the possibility to perform extremely precise tip-induced manipulation permit these molecules to be brought in contact with a nanoelectrode and the resulting electronic interaction to be analyzed in well controlled conditions.
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Affiliation(s)
- Francesca Moresco
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
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20
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Grill L, Rieder KH, Moresco F, Stojkovic S, Gourdon A, Joachim C. Controlling the electronic interaction between a molecular wire and its atomic scale contacting pad. NANO LETTERS 2005; 5:859-63. [PMID: 15884884 DOI: 10.1021/nl050197z] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
We report a quantitative study on the electronic interaction between a molecular wire and its atomic scale metallic contacting pad. A so-called "reactive Lander" molecule is manipulated using a low-temperature scanning tunneling microscope to form a planar one-end electronic contact. The increase of the STM contrast at the junction location is discussed by means of the electronic interaction between the contacting group of the molecular wire and the end atoms of the nanopad.
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Affiliation(s)
- Leonhard Grill
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany.
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21
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Recording the intramolecular deformation of a 4-legs molecule during its STM manipulation on a Cu(211) surface. Chem Phys Lett 2005. [DOI: 10.1016/j.cplett.2004.12.026] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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22
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Scanning tunneling microscopy single atom/molecule manipulation and its application to nanoscience and technology. ACTA ACUST UNITED AC 2005. [DOI: 10.1116/1.1990161] [Citation(s) in RCA: 136] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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23
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Gross L, Moresco F, Savio L, Gourdon A, Joachim C, Rieder KH. Scattering of surface state electrons at large organic molecules. PHYSICAL REVIEW LETTERS 2004; 93:056103. [PMID: 15323715 DOI: 10.1103/physrevlett.93.056103] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2004] [Indexed: 05/24/2023]
Abstract
The scattering of surface state electrons at Lander-type molecules on Cu(111) is investigated by means of scanning tunneling microscope (STM) experiments at low temperature and model calculations. Specific information concerning the electronic interaction of the different internal groups of the molecule with the surface is obtained. Remarkably, the central molecular wire of the molecule, although decoupled from the surface by spacer groups and therefore not visible in STM images, is the main one responsible for scattering of surface state electrons.
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Affiliation(s)
- Leo Gross
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
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Ghosh SC, Zhu X, Secchi A, Sadhukhan SK, Girdhar NK, Gourdon A. Molecular landers as probes for molecular device-metal surface interactions. Ann N Y Acad Sci 2004; 1006:82-93. [PMID: 14976011 DOI: 10.1196/annals.1292.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Specifically designed series of molecules (landers), comprising a central rigid polyaromatic core and several spacers that decouple the board from the metallic surface, have been synthesized. UHV-STM studies, on one hand, have shown important distortions of the molecule by interaction with the substrate. On the other hand, surface restructuring results from the presence of the molecules.
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