Self-assembly of zwitterionic molecules on a Au(232321) surface at low temperature

Makoudi, Younes; Didiot, Clément; Palmino, Frank; Duverger, Eric; Kierren, B.; Malterre, D.; Cherioux, Frédéric

doi:10.1016/j.susc.2009.10.012

Cited by 6 publications

(5 citation statements)

References 34 publications

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“…For the scorpion-like conformation, similar to the STM experiments [ 23 ], the two protrusions observed in the experimental pattern must be the aromatic rings, which are separated by 6.5 Å. This distance is too large to fit the experimentally observed pattern when the molecules are aligned along the direction of the substrate ( Fig.…”

Section: Resultssupporting

confidence: 54%

“…As mentioned above, MSPS has several conformational degrees of freedom and thus it is difficult to determine its exact conformation in the well-ordered islands observed on KCl. Makoudi et al [ 23 ] used scanning tunneling microscopy (STM) to measure MSPS on Au(23 23 21) and observed a parallelogram unit cell with dimensions of 1.1 × 0.5 nm 2 , and the molecules were adsorbed in the so-called scorpion-like conformation. The dipole moment of the molecule, which in this conformation is oriented perpendicular to the substrate surface, could only be imaged with low contrast, or not at all, by STM, due to its reduced conductivity and the fact that it is flexible.…”

Section: Resultsmentioning

confidence: 99%

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Dipole-driven self-organization of zwitterionic molecules on alkali halide surfaces

Nony¹,

Para²,

Cherioux³

et al. 2012

Beilstein J. Nanotechnol.

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SummaryWe 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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Section: Resultssupporting

confidence: 54%

Section: Resultsmentioning

confidence: 99%

Dipole-driven self-organization of zwitterionic molecules on alkali halide surfaces

Nony¹,

Para²,

Cherioux³

et al. 2012

Beilstein J. Nanotechnol.

Self Cite

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“…This has hitherto prevented a detailed understanding of atomic and molecular self-assembly phenomena on vicinal Au͑111͒ surfaces that have highlighted a striking adsorption site selectivity. [7][8][9][10][11] For instance, polycyclic aromatic hydrocarbons preferen-tially adsorb on kinks, then on step lines facing fcc regions and finally on those facing hcp ones 8,9,12 and a similar behavior is observed for C 60 . 11 For the adsorption of 1-nitronaphthalene on Au͑111͒, a tentative explanation of the step selectivity was proposed by Vladimirova et al 13 who performed density-functional-theory ͑DFT͒ calculations which assumed that the region beneath the step was not reconstructed.…”

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confidence: 72%

Atomistic insight into the adsorption site selectivity of stepped Au(111) surfaces

et al. 2010

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Using classical and ab initio simulations, we study the interplay between the Au͑111͒ surface reconstruction and monoatomic steps on a vicinal face. The experimentally observed discommensuration line patterns on a specific vicinal are reproduced and explained, and a complete description of the structure is given. An unusual atomic arrangement is shown to be responsible for the lower reactivity of hcp segments of step edges compared to the one of fcc segments. Our results provide an unprecedented understanding of the electronic and geometric properties of the complex Au͑111͒ surface.

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“…7,8 Rational supramolecular design utilizing CAHB is, however, in its early development stage with only a few CAHB surface self-assemblies studied thus far. [9][10][11][12] In contribution to this field, we present the first surface self-assembly STM investigation of a novel amphiphilic zwitterionic quinonemonoimine (C18Q, Fig. 1a).…”

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confidence: 99%

Charge-assisted hydrogen bond-directed self-assembly of an amphiphilic zwitterionic quinonemonoimine at the liquid–solid interface

et al. 2011

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Charge-assisted hydrogen bond-directed self-assembly of a zwitterionic quinonemonoimine was investigated at the liquid/solid interface using scanning tunnelling microscopy. Factors governing morphology, chirality and multilayer formation are discussed, presenting an important foundation for understanding the properties of a large family of related molecules with interesting potential in supramolecular design.

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Self-assembly of zwitterionic molecules on a Au(232321) surface at low temperature

Cited by 6 publications

References 34 publications

Dipole-driven self-organization of zwitterionic molecules on alkali halide surfaces

Dipole-driven self-organization of zwitterionic molecules on alkali halide surfaces

Atomistic insight into the adsorption site selectivity of stepped Au(111) surfaces

Charge-assisted hydrogen bond-directed self-assembly of an amphiphilic zwitterionic quinonemonoimine at the liquid–solid interface

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