Self-driven super water vapor-absorbing calcium alginate-based bionic leaf for Vis-NIR spectral simulation

Most bionic leaves cannot autonomously absorb water and maintain high water content like plant leaves, causing the low Vis-NIR spectral similarity to plant leaves. Herein, inspired by the transpiration of plant leaves, a self-driven water vapor-absorbing bionic leaf was prepared by the crosslinking between hygroscopic CaCl