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dc.contributor.authorZhu, Y.
dc.contributor.authorGupta, B.
dc.contributor.authorGuan, B.
dc.contributor.authorCiampi, Simone
dc.contributor.authorReece, P.
dc.contributor.authorGooding, J.
dc.identifier.citationZhu, Y. and Gupta, B. and Guan, B. and Ciampi, S. and Reece, P. and Gooding, J. 2013. Photolithographic strategy for patterning preformed, chemically modified, porous silicon photonic crystal using click chemistry. ACS Applied Materials and Interfaces. 5 (14): pp. 6514-6521.

Porous 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.publisherAmerican Chemical Society
dc.titlePhotolithographic strategy for patterning preformed, chemically modified, porous silicon photonic crystal using click chemistry
dc.typeJournal Article
dcterms.source.titleACS Applied Materials and Interfaces
curtin.departmentNanochemistry Research Institute
curtin.accessStatusFulltext not available

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