Disclosed herein is a composition comprising a crosslinked hydrogel; where the hydrogel comprises a polymer having a cleavable bond along a backbone of the polymer, along a substituent that undergoes crosslinking, or along the backbone of the polymer and along the substituent that undergoes crosslinking; where the cleavable bond is operative to be cleaved by an enzyme released in the body of a living being; and a semiconducting quantum dot that emits light in the visible portion of the electromagnetic spectrum.
