Dipole-driven self-organization of zwitterionic molecules on alkali halide surfaces
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...
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| Format: | Article |
| Language: | English |
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Beilstein-Institut
2012-03-01
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| Series: | Beilstein Journal of Nanotechnology |
| Subjects: | |
| Online Access: | https://doi.org/10.3762/bjnano.3.32 |
| _version_ | 1811223046908805120 |
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| author | Laurent Nony Franck Bocquet Franck Para Frédéric Chérioux Eric Duverger Frank Palmino Vincent Luzet Christian Loppacher |
| author_facet | Laurent Nony Franck Bocquet Franck Para Frédéric Chérioux Eric Duverger Frank Palmino Vincent Luzet Christian Loppacher |
| author_sort | Laurent Nony |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-12T08:26:19Z |
| format | Article |
| id | doaj.art-44f54799fd5441618beeaa088c7a126f |
| institution | Directory Open Access Journal |
| issn | 2190-4286 |
| language | English |
| last_indexed | 2024-04-12T08:26:19Z |
| publishDate | 2012-03-01 |
| publisher | Beilstein-Institut |
| record_format | Article |
| series | Beilstein Journal of Nanotechnology |
| spelling | doaj.art-44f54799fd5441618beeaa088c7a126f2022-12-22T03:40:23ZengBeilstein-InstitutBeilstein Journal of Nanotechnology2190-42862012-03-013128529310.3762/bjnano.3.322190-4286-3-32Dipole-driven self-organization of zwitterionic molecules on alkali halide surfacesLaurent Nony0Franck Bocquet1Franck Para2Frédéric Chérioux3Eric Duverger4Frank Palmino5Vincent Luzet6Christian Loppacher7Aix-Marseille Univ, IM2NP, Faculté des Sciences de St. Jérome, F-13397 Marseille France; CNRS, IM2NP, Faculté des Sciences de St. Jérome, F-13397 Marseille FranceAix-Marseille Univ, IM2NP, Faculté des Sciences de St. Jérome, F-13397 Marseille France; CNRS, IM2NP, Faculté des Sciences de St. Jérome, F-13397 Marseille FranceAix-Marseille Univ, IM2NP, Faculté des Sciences de St. Jérome, F-13397 Marseille France; CNRS, IM2NP, Faculté des Sciences de St. Jérome, F-13397 Marseille FranceInstitut FEMTO-ST, Université de Franche-Comté, CNRS, ENSMM, 32, Avenue de l’Observatoire, F-25044 Besancon Cedex, FranceInstitut FEMTO-ST, Université de Franche-Comté, CNRS, ENSMM, 32, Avenue de l’Observatoire, F-25044 Besancon Cedex, FranceInstitut FEMTO-ST, Université de Franche-Comté, CNRS, ENSMM, 32, Avenue de l’Observatoire, F-25044 Besancon Cedex, FranceInstitut FEMTO-ST, Université de Franche-Comté, CNRS, ENSMM, 32, Avenue de l’Observatoire, F-25044 Besancon Cedex, FranceAix-Marseille Univ, IM2NP, Faculté des Sciences de St. Jérome, F-13397 Marseille France; CNRS, IM2NP, Faculté des Sciences de St. Jérome, F-13397 Marseille FranceWe 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.https://doi.org/10.3762/bjnano.3.32alkali halide surfacenoncontact atomic force microscopyorganic moleculeself-organizationzwitterion |
| spellingShingle | Laurent Nony Franck Bocquet Franck Para Frédéric Chérioux Eric Duverger Frank Palmino Vincent Luzet Christian Loppacher Dipole-driven self-organization of zwitterionic molecules on alkali halide surfaces Beilstein Journal of Nanotechnology alkali halide surface noncontact atomic force microscopy organic molecule self-organization zwitterion |
| title | Dipole-driven self-organization of zwitterionic molecules on alkali halide surfaces |
| title_full | Dipole-driven self-organization of zwitterionic molecules on alkali halide surfaces |
| title_fullStr | Dipole-driven self-organization of zwitterionic molecules on alkali halide surfaces |
| title_full_unstemmed | Dipole-driven self-organization of zwitterionic molecules on alkali halide surfaces |
| title_short | Dipole-driven self-organization of zwitterionic molecules on alkali halide surfaces |
| title_sort | dipole driven self organization of zwitterionic molecules on alkali halide surfaces |
| topic | alkali halide surface noncontact atomic force microscopy organic molecule self-organization zwitterion |
| url | https://doi.org/10.3762/bjnano.3.32 |
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