Self‐Assembly of Periodic Bicomponent Wires and Ribbons

Cañas‐Ventura, Marta E.; Xiao, Wende; Wasserfallen, Daniel; Müllen, Kläus; Brune, Harald; Barth, Johannes V.; Fasel, Román

doi:10.1002/anie.200604083

Cited by 160 publications

(95 citation statements)

References 60 publications

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“…Gradual accommodation of the NaCl lattice over monatomic steps is observed to take place by several unit cells with different lattice 1 1 1). The same structure is observed, and has been reported [14] on Au (11 12 12). Inset: three-fold H-bond formed between the complementary end groups of BDATB and PTCDI.…”

Section: Resultssupporting

confidence: 87%

“…4e were used as substrates for codeposition of BDATB and PTCDI molecules. Both molecular species exhibit a clear preference to adsorb on the metal, which leads to a complete coverage of the NaCl-free areas with the bimolecular structure observed previously [14] and shown in Fig. 1.…”

Section: Bimolecular Ribbons On Nacl/au(11 12 12)supporting

confidence: 67%

“…However, the targeted superlattice of bimolecular wires -as achieved on the metallic Au(11 12 12) surface [14] -is not observed on NaCl/Au(11 12 12). The step edges of the underlying vicinal Au(11 12 12) surface do not anymore guide the growth direction of bimolecular wires through the NaCl films, which we attribute to the morphologicaland probably also electronic -smoothing induced by the NaCl film.…”

Section: Bimolecular Ribbons On Nacl/au(11 12 12)mentioning

confidence: 99%

“…We present a strategy increasing the molecule-NaCl binding energy while maintaining the structure of Recently, we reported on the formation of regular 3,4,9,10-perylenetetracarboxylic diimide (PTCDI) and 1,4-bis-(2,4-diamino-1,3,5,-triazine)-benzene (BDATB) bimolecular wires and ribbons based on a hydrogen-bonding motif (Fig. 1) on Au(1 1 1) and on the vicinal Au(11 12 12) surface [14]. The experiments demonstrated the formation of three-fold hydrogen bonds between complementary molecular end groups on both surfaces.…”

Section: Introductionmentioning

confidence: 99%

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Stabilization of bimolecular islands on ultrathin NaCl films by a vicinal substrate

et al. 2009

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a b s t r a c tThe structure of ultrathin NaCl films on Au(1 1 1) and on Au(11 12 12), as well as the one of bimolecular 3,4,9,10-perylenetetracarboxylic diimide (PTCDI) and 1,4-bis-(2,4-diamino-1,3,5,-triazine)-benzene (BDATB) islands on NaCl films on both surfaces have been studied with a low-temperature scanning tunnelling microscope. We show that intermixed bimolecular assemblies based on selective three-fold hydrogen-bonding (H-bonding), that have previously been observed on Au(1 1 1) and on Au(11 12 12), can also be stabilized on insulating NaCl films on Au, however, only if these films are grown on Au(11 12 12) and not on Au(1 1 1). The behaviour of the heterocomplex structures is found to be largely influenced by the structural properties of the underlying substrate and by the number of NaCl layers. On a partly NaCl-covered Au(1 1 1) surface, the excess of molecules after completion of the first layer on Au prefers to form a second molecular layer based on ordered heterocomplex structures rather than to adsorb on the NaCl islands. The use of a vicinal surface together with the strong cohesion characteristic of the NaCl film introduces smooth elastic deformations on the NaCl(0 0 1) plane. As a consequence, the periodically modified structure of the overlayer provides preferential binding sites and allows adsorption of two-dimensional molecular structures. In contrast to what is observed on Au(11 12 12), the molecular domains on the NaCl film do not follow the Au step directions, but the NaCl(0 0 1) high symmetry directions. Our results provide a strategy to increase the adsorption energy of flat molecules on insulating layers by choosing a vicinal metal substrate.

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Section: Resultssupporting

confidence: 87%

Section: Bimolecular Ribbons On Nacl/au(11 12 12)supporting

confidence: 67%

Section: Bimolecular Ribbons On Nacl/au(11 12 12)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Stabilization of bimolecular islands on ultrathin NaCl films by a vicinal substrate

et al. 2009

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“…We briefly mention that vicinal Au surfaces have been mainly used to drive the selfassembly of C 60 and PTCDA into nanodots or nanowires. The most studied surfaces are Au(788) and Au(433) [121,122], although higher index surfaces have also been recently investigated [123,124].…”

Section: Nanostructured Surfacesmentioning

confidence: 99%