Patterned Paper as a Template for the Delivery of Reactants in the Fabrication of Planar Materials

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Patterned Paper as a Template for the Delivery of Reactants in the Fabrication of Planar Materials

Show simple item record Bracher, Paul J. Gupta, Malancha Whitesides, George M. 2012-11-06T19:13:44Z 2010
dc.identifier.citation Bracher, Paul J., Malancha Gupta, and George M. Whitesides. 2010. Patterned paper as a template for the delivery of reactants in the fabrication of planar materials. Soft Matter 6(18): 4303-4309. en_US
dc.identifier.issn 1744-863X en_US
dc.identifier.issn 1477-6848 en_US
dc.description.abstract This account reviews the use of templates, fabricated by patterning paper, for the delivery of aqueous solutions of reactants (predominantly, ions) in the preparation of structured, thin materials (e.g., films of ionotropic hydrogels). In these methods, a patterned sheet of paper transfers an aqueous solution of reagent to a second phase—either solid or liquid—brought into contact with the template; this process can form solid structures with thicknesses that are typically ≤1.5 mm. The shape of the template and the pattern of a hydrophobic barrier on the paper control the shape of the product, in its plane, by restricting the delivery of the reagent in two dimensions. The concentration of the reagents, and the duration that the template remains in contact with the second phase, control growth in the third dimension (i.e., thickness). The method is especially useful in fabricating shaped films of ionotropic hydrogels (e.g., calcium alginate ) by controlling the delivery of solutions of multivalent cations to solutions of anionic polymers. The templates can also be used to direct reactions that generate patterns of solid precipitates within sheets of paper. This review examines applications of the method for: (i) patterning bacteria in two dimensions within a hydrogel film, (ii) manipulating hydrogel films and sheets of paper magnetically, and (iii) generating dynamic 3-D structures (e.g., a cylinder of rising bubbles of O\(_2\)) from sheets of paper with 2-D patterns of a catalyst (e.g., Pd\(^0\)) immersed in appropriate reagents (e.g., 1% H\(_2\)O\(_2\) in water). en_US
dc.description.sponsorship Chemistry and Chemical Biology en_US
dc.language.iso en_US en_US
dc.publisher Royal Society of Chemistry en_US
dc.relation.isversionof doi:10.1039/c0sm00031k en_US
dc.relation.hasversion en_US
dc.relation.hasversion en_US
dash.license OAP
dc.subject alginate hydrogels en_US
dc.subject release en_US
dc.subject films en_US
dc.subject microfluidics en_US
dc.subject biomaterials en_US
dc.subject systems en_US
dc.subject stamps en_US
dc.subject ions en_US
dc.subject gel en_US
dc.subject wax en_US
dc.title Patterned Paper as a Template for the Delivery of Reactants in the Fabrication of Planar Materials en_US
dc.type Journal Article en_US
dc.description.version Accepted Manuscript en_US
dc.relation.journal Soft Matter en_US Whitesides, George M. 2012-11-06T19:13:44Z

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