Extended Data Fig. 2: Presence of NHS ester and surface amine coupling of the DST.
From: Dry double-sided tape for adhesion of wet tissues and devices
a, Transmission FTIR spectrum of the DST with NHS ester. The carboxylic acid C=O stretch at 1,710 cm−1 is associated with PAAc in the DST. The symmetric C–N–C stretch at 1,219 cm−1 and asymmetric C–N–C stretch at 1,307 cm−1 are associated with NHS ester in the DST35,36. b, Schematic illustration of covalent crosslinking between amine-coupled fluorescent microbeads (µ-beads) with the DST. c, Fluorescence microscopy images of covalently crosslinked microbeads with DST with NHS ester (left) and DST without NHS ester (right).
