Journal ArticleDOI
Random Tiling and Topological Defects in a Two-Dimensional Molecular Network
Matthew O. Blunt,James C. Russell,Maria del Carmen Gimenez-Lopez,Juan P. Garrahan,Xiang Lin,Martin Schröder,Neil R. Champness,Peter H. Beton +7 more
TLDR
A molecular network that exhibits critical correlations in the spatial order that is characteristic of a random, entropically stabilized, rhombus tiling is described and a topological defect can propagate through the network, giving rise to a local reordering of molecular tiles and thus to transitions between quasi-degenerate local minima of a complex energy landscape.Abstract:
A molecular network that exhibits critical correlations in the spatial order that is characteristic of a random, entropically stabilized, rhombus tiling is described. Specifically, we report a random tiling formed in a two-dimensional molecular network of p-terphenyl-3,5,3',5'-tetracarboxylic acid adsorbed on graphite. The network is stabilized by hexagonal junctions of three, four, five, or six molecules and may be mapped onto a rhombus tiling in which an ordered array of vertices is embedded within a nonperiodic framework with spatial fluctuations in a local order characteristic of an entropically stabilized phase. We identified a topological defect that can propagate through the network, giving rise to a local reordering of molecular tiles and thus to transitions between quasi-degenerate local minima of a complex energy landscape. We draw parallels between the molecular tiling and dynamically arrested systems, such as glasses.read more
Citations
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Predictive Self-Assembly of Polyhedra into Complex Structures
TL;DR: 145 convex polyhedra whose assembly arises solely from their anisotropic shape are investigated, demonstrating a remarkably high propensity for thermodynamic self-assembly and structural diversity.
Journal ArticleDOI
Chemically Stable Multilayered Covalent Organic Nanosheets from Covalent Organic Frameworks via Mechanical Delamination
Suman Chandra,Sharath Kandambeth,Bishnu P. Biswal,Binit Lukose,Shrikant M. Kunjir,Minakshi Chaudhary,Ravichandar Babarao,Thomas Heine,Rahul Banerjee +8 more
TL;DR: The synthesized COFs were successfully delaminated using a simple, safe, and environmentally friendly mechanical grinding route to transform into covalent organic nanosheets (CONs) and were well characterized via transmission electron microscopy and atomic force microscopy.
Journal ArticleDOI
Molecular and Supramolecular Networks on Surfaces: From Two-Dimensional Crystal Engineering to Reactivity
TL;DR: Recent developments in the design and functionality of supramolecular surface patterns are highlighted, with special attention paid to those networks which are chiral or contain a high degree of porosity as well as to the reactivity, which is one of the most important recent developments in supramolescular surface chemistry.
Journal ArticleDOI
Tailoring molecular layers at metal surfaces
TL;DR: This Review provides an overview of vacuum-deposited organic networks at metal surfaces, using intermolecular hydrogen bonding, metal-atom coordination and in situ polymerization.
Journal ArticleDOI
Competition of shape and interaction patchiness for self-assembling nanoplates
Xingchen Ye,Jun Chen,Michael Engel,Jaime A. Millan,Wenbin Li,Liang Qi,Guozhong Xing,Joshua E. Collins,Cherie R. Kagan,Ju Li,Sharon C. Glotzer,Christopher B. Murray +11 more
TL;DR: A joint experimental-computational multiscale investigation of a class of highly faceted planar lanthanide fluoride nanocrystals (nanoplates, nanoplatelets), which self-assemble into long-range ordered tilings at the liquid-air interface formed by a hexane wetting layer.
References
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Metallic Phase with Long-Range Orientational Order and No Translational Symmetry
TL;DR: In this article, a metallic solid with long-range orientational order, but with icosahedral point group symmetry, which is inconsistent with lattice translations, was observed and its diffraction spots are as sharp as those of crystals but cannot be indexed to any Bravais lattice.
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Quasicrystals: a new class of ordered structures
Dov Levine,Paul J. Steinhardt +1 more
TL;DR: In this article, two-and three-dimensional quasicrystals were classified by their symmetry under rotation and showed that many disallowed crystal symmetries are allowed quasici-rystal symmets.
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Dimer Statistics and Phase Transitions
TL;DR: In this article, it was shown that the configurational partition function of a generalized dimer system can be expressed in terms of a Pfaffian, and hence calculated explicitly, if the lattice graph is planar and if the dimers occupy all lattice sites.
Journal ArticleDOI
Kinetic Ising Model of the Glass Transition
TL;DR: In this paper, a graph theory of single spin-flip kinetic Ising models is developed and applied to a class of spin models with strongly cooperative dynamics, and self-consistent approximations for the spin time correlation function are presented.