Please use this identifier to cite or link to this item: https://doi.org/10.1021/am3014482
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dc.titleFabrication of large domain crack-free colloidal crystal heterostructures with superposition bandgaps using hydrophobic polystyrene spheres
dc.contributor.authorCai, Z.
dc.contributor.authorLiu, Y.J.
dc.contributor.authorTeng, J.
dc.contributor.authorLu, X.
dc.date.accessioned2014-10-09T06:47:32Z
dc.date.available2014-10-09T06:47:32Z
dc.date.issued2012-10-24
dc.identifier.citationCai, Z., Liu, Y.J., Teng, J., Lu, X. (2012-10-24). Fabrication of large domain crack-free colloidal crystal heterostructures with superposition bandgaps using hydrophobic polystyrene spheres. ACS Applied Materials and Interfaces 4 (10) : 5562-5569. ScholarBank@NUS Repository. https://doi.org/10.1021/am3014482
dc.identifier.issn19448244
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/88893
dc.description.abstractAn improved convective self-assembly method was developed to fabricate crack-free colloidal crystal heterostructure over a relatively large area. A composite opaline heterostructure composed of polystyrene (PS) colloids was first fabricated. Subsequent calcination of the opaline heterostructure led to the formation of inverse opaline heterostructure composed of SiO 2 or TiO 2. Both opaline and inverse opaline heterostructures demonstrated long-range ordering in a relatively large domain (>100 × 100 μm 2). Optical reflection measurements of the inverse opaline heterostructures showed dual stop bands as a consequence of the superposition of the stop bands from the individual compositional colloidal crystals (CCs). In addition, the relative position of the two stop bands can be adjusted by varying the size of the colloidal spheres in the original CCs template. Both types of colloidal crystal heterostructures can be used for optical filters, high-efficiency back-reflectors or electrodes in solar cells, differential drug release, and protein patterning. © 2012 American Chemical Society.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1021/am3014482
dc.sourceScopus
dc.subjectcolloidal crystals
dc.subjectconvective self-assembly
dc.subjectcrack-free
dc.subjectheterostructure
dc.subjectlarge area
dc.subjectsuperposition stop bands
dc.typeArticle
dc.contributor.departmentCHEMICAL & BIOMOLECULAR ENGINEERING
dc.description.doi10.1021/am3014482
dc.description.sourcetitleACS Applied Materials and Interfaces
dc.description.volume4
dc.description.issue10
dc.description.page5562-5569
dc.identifier.isiut000310109000069
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