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  • 1
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    Materials science: A tale of two tilings (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-07-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Glotzer, Sharon C -- Keys, Aaron S -- England -- Nature. 2008 Jul 24;454(7203):420-1. doi: 10.1038/454420a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18650908" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 2
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    Disordered, quasicrystalline and crystalline phases of densely packed tetrahedra (2009)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2009-12-17
    Description: All hard, convex shapes are conjectured by Ulam to pack more densely than spheres, which have a maximum packing fraction of phi = pi/ radical18 approximately 0.7405. Simple lattice packings of many shapes easily surpass this packing fraction. For regular tetrahedra, this conjecture was shown to be true only very recently; an ordered arrangement was obtained via geometric construction with phi = 0.7786 (ref. 4), which was subsequently compressed numerically to phi = 0.7820 (ref. 5), while compressing with different initial conditions led to phi = 0.8230 (ref. 6). Here we show that tetrahedra pack even more densely, and in a completely unexpected way. Following a conceptually different approach, using thermodynamic computer simulations that allow the system to evolve naturally towards high-density states, we observe that a fluid of hard tetrahedra undergoes a first-order phase transition to a dodecagonal quasicrystal, which can be compressed to a packing fraction of phi = 0.8324. By compressing a crystalline approximant of the quasicrystal, the highest packing fraction we obtain is phi = 0.8503. If quasicrystal formation is suppressed, the system remains disordered, jams and compresses to phi = 0.7858. Jamming and crystallization are both preceded by an entropy-driven transition from a simple fluid of independent tetrahedra to a complex fluid characterized by tetrahedra arranged in densely packed local motifs of pentagonal dipyramids that form a percolating network at the transition. The quasicrystal that we report represents the first example of a quasicrystal formed from hard or non-spherical particles. Our results demonstrate that particle shape and entropy can produce highly complex, ordered structures.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haji-Akbari, Amir -- Engel, Michael -- Keys, Aaron S -- Zheng, Xiaoyu -- Petschek, Rolfe G -- Palffy-Muhoray, Peter -- Glotzer, Sharon C -- England -- Nature. 2009 Dec 10;462(7274):773-7. doi: 10.1038/nature08641.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20010683" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 3
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    Self-assembly of CdTe nanocrystals into free-floating sheets (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-10-14
    Description: In their physical dimensions, surface chemistry, and degree of anisotropic interactions in solution, CdTe nanoparticles are similar to proteins. We experimentally observed their spontaneous, template-free organization into free-floating particulate sheets, which resemble the assembly of surface layer (S-layer) proteins. Computer simulation and concurrent experiments demonstrated that the dipole moment, small positive charge, and directional hydrophobic attraction are the driving forces for the self-organization process. The data presented here highlight the analogy of the solution behavior of the two vastly different classes of chemical structures.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tang, Zhiyong -- Zhang, Zhenli -- Wang, Ying -- Glotzer, Sharon C -- Kotov, Nicholas A -- New York, N.Y. -- Science. 2006 Oct 13;314(5797):274-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109-2136, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17038616" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Light-controlled self-assembly of semiconductor nanoparticles into twisted ribbons (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-02-13
    Description: The collective properties of nanoparticles manifest in their ability to self-organize into complex microscale structures. Slow oxidation of tellurium ions in cadmium telluride (CdTe) nanoparticles results in the assembly of 1- to 4-micrometer-long flat ribbons made of several layers of individual cadmium sulfide (CdS)/CdTe nanocrystals. Twisting of the ribbons with an equal distribution of left and right helices was induced by illumination with visible light. The pitch lengths (250 to 1500 nanometers) varied with illumination dose, and the twisting was associated with the relief of mechanical shear stress in assembled ribbons caused by photooxidation of CdS. Unusual shapes of multiparticle assemblies, such as ellipsoidal clouds, dog-bone agglomerates, and ribbon bunches, were observed as intermediate stages. Computer simulations revealed that the balance between attraction and electrostatic repulsion determines the resulting geometry and dimensionality of the nanoparticle assemblies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Srivastava, Sudhanshu -- Santos, Aaron -- Critchley, Kevin -- Kim, Ki-Sub -- Podsiadlo, Paul -- Sun, Kai -- Lee, Jaebeom -- Xu, Chuanlai -- Lilly, G Daniel -- Glotzer, Sharon C -- Kotov, Nicholas A -- New York, N.Y. -- Science. 2010 Mar 12;327(5971):1355-9. doi: 10.1126/science.1177218. Epub 2010 Feb 11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20150443" target="_blank"〉PubMed〈/a〉
    Keywords: Cadmium Compounds/chemistry ; Computer Simulation ; *Light ; Metal Nanoparticles/chemistry/*ultrastructure ; Microscopy, Electron ; Oxidation-Reduction ; *Quantum Dots ; Spectrometry, X-Ray Emission ; Sulfides/chemistry ; Tellurium/chemistry
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Predictive self-assembly of polyhedra into complex structures (2012)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2012-07-28
    Description: Predicting structure from the attributes of a material's building blocks remains a challenge and central goal for materials science. Isolating the role of building block shape for self-assembly provides insight into the ordering of molecules and the crystallization of colloids, nanoparticles, proteins, and viruses. We investigated 145 convex polyhedra whose assembly arises solely from their anisotropic shape. Our results demonstrate a remarkably high propensity for thermodynamic self-assembly and structural diversity. We show that from simple measures of particle shape and local order in the fluid, the assembly of a given shape into a liquid crystal, plastic crystal, or crystal can be predicted.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Damasceno, Pablo F -- Engel, Michael -- Glotzer, Sharon C -- New York, N.Y. -- Science. 2012 Jul 27;337(6093):453-7. doi: 10.1126/science.1220869.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Applied Physics Program, University of Michigan, Ann Arbor, MI 48109, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22837525" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 6
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    Materials science. Some Assembly Required (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-10-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Glotzer, Sharon C -- New York, N.Y. -- Science. 2004 Oct 15;306(5695):419-20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemical Engineering and the Department of Materials Science and Engineering, University of Michigan, 2300 Hayward Street, Ann Arbor, MI 48109-2136, USA. sglotzer@umich.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15486279" target="_blank"〉PubMed〈/a〉
    Keywords: Chemistry, Physical ; Genetic Engineering ; Ligands ; *Macromolecular Substances ; *Nanotechnology ; Physicochemical Phenomena ; Polymers/*chemistry ; Surface Properties
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 7
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    Materials science: Complex order in soft matter (2011)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2011-03-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Glotzer, Sharon C -- Engel, Michael -- England -- Nature. 2011 Mar 17;471(7338):309-10. doi: 10.1038/471309a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21412327" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 8
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    Nanotechnology: Shape matters (2012)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2012-01-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Glotzer, Sharon C -- England -- Nature. 2012 Jan 25;481(7382):450-2. doi: 10.1038/481450a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22281589" target="_blank"〉PubMed〈/a〉
    Keywords: Crystallization ; DNA/chemistry ; Gold/chemistry ; Ligands ; Metal Nanoparticles/*chemistry
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 9
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    Growing correlation length on cooling below the onset of caging in a simulated glass-forming liquid (2002)
    American Physical Society
    Details
    Publication Date: 2002-09-13
    Print ISSN: 1063-651X
    Electronic ISSN: 1095-3787
    Topics: Physics
    Published by American Physical Society
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  • 10
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    Comment on ‘‘Spreading of damage: An unexpected disagreement between the sequential and parallel updatings in Monte Carlo simulations’’ (1993)
    American Physical Society
    Details
    Publication Date: 1993-03-29
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society
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