Global Challenges 2018, 12, 1800035
In the initially published manuscript, Equation 1 and 2 are incorrectly represented and are corrected to the following:
where A s is the cross‐sectional area of the stem, L is the stem length, A c is the top surface area of the cap, d is the cap thickness, ρw is the cap material density, c w is the specific heat of the cap material, and κw is the thermal conductivity of the stem. ΔT. is the rate of the temperature change, ΔT is the temperature difference between the cap and the water in the reservoir below, and P rad is the power density absorbed in the cap, which is proportional to the absorbance of the coating. From Eq. (1), the maximum temperature difference, which occurs at saturation, i.e., ΔT = 0, is
This error does not affect the results or conclusions of the manuscript. The authors apologize for any inconvenience or misunderstanding that this error may have caused.