Stimuli-enabled zipper-like graphene interface for auto-switchable bioelectronics.
2016 (English)In: Biosensors & bioelectronics, ISSN 0956-5663, E-ISSN 1873-4235Article in journal (Refereed) In press
Graphene interfaces with multi-stimuli responsiveness are of particular interest due to their diverse super-thin interfacial behaviour, which could be well suited to operating complex physiological systems in a single miniaturised domain. In general, smart graphene interfaces switch bioelectrodes from the hydrophobic to hydrophilic state, or vice versa, upon triggering. In the present work, a stimuli encoded zipper-like graphene oxide (GrO)/polymer interface was fabricated with in situ poly(N-isopropylacrylamide–co–diethylaminoethylmethylacrylate), i.e., poly(NIPAAm–co–DEAEMA) directed hierarchical self-assembly of GrO and glucose oxidase (GOx). The designed interface exhibited reversible on/off-switching of bio-electrocatalysis on changing the pH between 5 and 8, via phase transition from super hydrophilic to hydrophobic. The study further indicated that the zipper-like interfacial bioelectrochemical properties could be tuned over a modest change of temperature (i.e., 20–40 °C). The resulting auto-switchable interface has implications for the design of novel on/off-switchable biodevices with ‘in-built’ self-control.
Place, publisher, year, edition, pages
Triggered interfaces; Graphene bioelectronics; Smart Bioelectrocatalysis; On/off-switchable bio-devices
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:liu:diva-128196DOI: 10.1016/j.bios.2016.03.052PubMedID: 27132998OAI: oai:DiVA.org:liu-128196DiVA: diva2:929990