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Photolithographic strategy for patterning preformed, chemically modified, porous silicon photonic crystal using click chemistry

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dc.contributor.authorZhu, Y.
dc.contributor.authorGupta, B.
dc.contributor.authorGuan, B.
dc.contributor.authorCiampi, S.
dc.contributor.authorReece, P.J.
dc.contributor.authorGooding, J.J.
dc.date.issued2013
dc.descriptionData source: Supporting Info, http://pubs.acs.org/doi/suppl/10.1021/am4006012
dc.description.abstractPorous silicon (PSi) is an ideal platform for label-free biosensing, and the development of porous silicon patterning will open a pathway to the development of highly parallel PSi biochips for detecting multiple analytes. The optical response of PSi photonic crystal is determined by the changes in the effective bulk refractive index resulting from reactions/events occurring within the internal pore space. Therefore, introducing precise chemical functionalities in the pores of PSi is essential to ensure device selectivity. Here we describe the fabrication of PSi patterns that possess discrete chemical functionalities that are restricted to precise locations. The key difference to previous patterning protocols for PSi is that the entire porous material is first modified with a self-assembled monolayer of a α,ω-diyne adsorbate prior to patterning using a microfabricated titanium mask. The distal alkyne moieties in the monolayer are then amenable to further selective modification by the archetypal "click" reaction, the copper catalyzed alkyne-azide cycloaddition (CuAAC), using the titanium mask as a resist. This type of patterning is suitable for further immobilization of biological recognition elements, and presents a new platform for highly parallel PSi biosensor for multiple detections.
dc.identifier.citationACS applied materials & interfaces, 2013; 5(14):6514-6521
dc.identifier.doi10.1021/am4006012
dc.identifier.issn1944-8244
dc.identifier.issn1944-8252
dc.identifier.orcidGuan, B. [0000-0003-1247-6914]
dc.identifier.urihttps://hdl.handle.net/11541.2/119373
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.relation.fundingARC DP110102183
dc.relation.fundingNHMRC 1024723
dc.rightsCopyright 2013 American Chemical Society
dc.source.urihttps://doi.org/10.1021/am4006012
dc.subjectclick reaction
dc.subjecthydrosilylation
dc.subjectmicrofabrication
dc.subjectpatterning photonic crystal
dc.subjectporous silicon
dc.titlePhotolithographic strategy for patterning preformed, chemically modified, porous silicon photonic crystal using click chemistry
dc.typeJournal article
pubs.publication-statusPublished
ror.mmsid9915989384501831

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