Fig. 4. (a) Surface temperature profiles of ACLA-C and ACLA-C_PEI photothermal layers in dry condition. (b) Absorption spectra of ACLA-C and ACLA-C_PEI measured in dry state. (c) XPS survey scan of ACLA-C and ACLA-C_PEI. High-resolution C 1s spectra of (d) ACLA-C and (e) ACLA-C_PEI, (f) water uptake measurements of ACLA-C and ACLA-C_PEI with respect to time.