Figure 3.

(a) Representative diffraction spectra of 2D Au nanosphere arrays/PBA-modified hydrogel composite films in high ionic strength buffer solution at different glucose concentrations; (b) glucose concentration dependence of the diffraction wavelength of the composite films; and (c) interactions of PBA-modified hydrogel with the furanose form of glucose in high ionic strength buffer solution with increasing glucose concentration. Error bars represent standard deviation (SD) of four samples.