title: Photonic porous silicon as a pH sensor.
abstract: Chronic wounds do not heal within 3 months, and during the lengthy healing process, the wound is invariably exposed to bacteria, which can colonize the wound bed and form biofilms. This alters the wound metabolism and brings about a change of pH. In this work, porous silicon photonic films were coated with the pH-responsive polymer poly(2-diethylaminoethyl acrylate). We demonstrated that the pH-responsive polymer deposited on the surface of the photonic film acts as a barrier to prevent water from penetrating inside the porous matrix at neutral pH. Moreover, the device demonstrated optical pH sensing capability visible by the unaided eye.
authors.affiliation: Mawson Institute, University of South Australia, GPO Box 247, Adelaide, South Australia 5001, Australia.
authors.forename: Stephanie
authors.initials: S
authors.lastname: Pace
authors.affiliation: Mawson Institute, University of South Australia, GPO Box 247, Adelaide, South Australia 5001, Australia.
authors.forename: Roshan B
authors.initials: RB
authors.lastname: Vasani
authors.affiliation: Key Centre for Polymer Colloids Room 351, School of Chemistry, University of Sydney, Sydney, NSW 2006, Australia.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhao
authors.affiliation: Key Centre for Polymer Colloids Room 351, School of Chemistry, University of Sydney, Sydney, NSW 2006, Australia ; Department of Chemistry, The University of Warwick, Coventry CV4 7AL, UK.
authors.forename: Sébastien
authors.initials: S
authors.lastname: Perrier
authors.affiliation: Mawson Institute, University of South Australia, GPO Box 247, Adelaide, South Australia 5001, Australia.
authors.forename: Nicolas H
authors.initials: NH
authors.lastname: Voelcker
keywords: Color change sensor; Porous silicon; RAFT polymerization; pH-responsive polymer