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. Author manuscript; available in PMC: 2022 Apr 1.
Published in final edited form as: Adv Drug Deliv Rev. 2021 Jan 22;171:94–107. doi: 10.1016/j.addr.2021.01.009

Figure 1.

Figure 1.

A. methods for incorporation of photoresponse in drug delivery. Small-molecule prodrugs (red), nanostructures (blue), and hydrogel biomaterials (green) have all been modified with photoactivators to deliver drug cargo. B. Differently colored light affords different penetration into skin. Image depicts the maximum depth into human skin that >1% of incident photons will reach as a function of wavelength.