Chemical modification of polymeric cantilever Sensors with multiamine supramolecular hydrogel

A chemical process to integrate stimuli-responsive hydrogels on SU-8 cantilever surface, taking advantage of the free epoxy groups of patterned SU-8 is reported. The network structure of the multiamine hydrogel is formed on the cantilever surface through a ring-opening and amine-substituted reaction at epoxy groups of SU-8. X-ray photoelectron spectroscopy (XPS) is used to demonstrate the effective placement of the supramolecular hydrogel (SH) on the patterned SU-8 surface. The enhanced practicability of functionalized SU-8 cantilever sensor is demonstrated by measuring the concentration of ferric ion, indicating a potential use of SH functionalized cantilever sensors.