Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/150226
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dc.contributor.authorSankaewtong, Krongtumen_US
dc.contributor.authorLei, Qun-lien_US
dc.contributor.authorNi, Ranen_US
dc.date.accessioned2021-06-04T03:41:33Z-
dc.date.available2021-06-04T03:41:33Z-
dc.date.issued2019-
dc.identifier.citationSankaewtong, K., Lei, Q. & Ni, R. (2019). Self-assembled multi-layer simple cubic photonic crystals of oppositely charged colloids in confinement. Soft Matter, 15(15), 3104-3110. https://dx.doi.org/10.1039/c9sm00018fen_US
dc.identifier.issn1744-683Xen_US
dc.identifier.urihttps://hdl.handle.net/10356/150226-
dc.description.abstractDesigning and fabricating self-assembled open colloidal crystals have become one major direction in the soft matter community because of many promising applications associated with open colloidal crystals. However, most of the self-assembled crystals found in experiments are not open but close-packed. Here, by using computer simulation, we systematically investigate the self-assembly of oppositely charged colloidal hard spheres confined between two parallel hard walls, and we find that the confinement can stabilize multi-layer NaCl-like (simple cubic) open crystals. The maximal number of layers of stable NaCl-like crystals increases with decreasing inverse screening length. More interestingly, at finite low temperature, the large vibrational entropy can stabilize some multi-layer NaCl-like crystals against the most energetically favoured close-packed crystals. In the parameter range studied, we find up to 4-layer NaCl-like crystals to be stable in confinement. Our photonic calculation shows that the inverse 4-layer NaCl-like crystal can already reproduce the large photonic band gaps of the bulk simple cubic crystal, which open in the low frequency range with a low dielectric contrast. This suggests new possibilities of using confined colloidal systems to fabricate open crystalline materials with novel photonic properties.en_US
dc.description.sponsorshipAgency for Science, Technology and Research (A*STAR)en_US
dc.description.sponsorshipMinistry of Education (MOE)en_US
dc.description.sponsorshipNanyang Technological Universityen_US
dc.language.isoenen_US
dc.relationM4081781.120en_US
dc.relationM4011616.120en_US
dc.relationM4011873.120en_US
dc.relationA1784C0018en_US
dc.relation.ispartofSoft Matteren_US
dc.rights© 2019 Royal Society of Chemistry. All rights reserved.en_US
dc.subjectEngineering::Chemical engineeringen_US
dc.titleSelf-assembled multi-layer simple cubic photonic crystals of oppositely charged colloids in confinementen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Chemical and Biomedical Engineeringen_US
dc.identifier.doi10.1039/c9sm00018f-
dc.identifier.pmid30810154-
dc.identifier.scopus2-s2.0-85064174602-
dc.identifier.issue15en_US
dc.identifier.volume15en_US
dc.identifier.spage3104en_US
dc.identifier.epage3110en_US
dc.subject.keywordsCrystalline Materialsen_US
dc.subject.keywordsEnergy Gapen_US
dc.description.acknowledgementThis work is supported by the Nanyang Technological University Start-Up Grant (NTU-SUG: M4081781.120), the Academic Research Fund from Singapore Ministry of Education (M4011616.120 and M4011873.120), and the Advanced Manufacturing and Engineering Young Individual Research Grant (A1784C0018) from the Science and Engineering Research Council of Agency for Science, Technology and Research, Singapore.en_US
item.grantfulltextnone-
item.fulltextNo Fulltext-
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