Through further combinations with other techniques, such surfaces can be used for capillary assembling soft electronics, surface self-cleaning, and so on. The self-similar structure exhibits a super hydrophilicity, a high light absorbance (>90%) in an ultra-broad spectrum (200–2500 nm), and an extraordinarily high efficiency in heat transfer. Here, by introducing solvent-assisted UV-lasering, we establish an elegant approach to fabricate self-similar hierarchical micro–nano structures on silicon. However, artificial self-similar surfaces with hierarchical micro–nano structures and their application development have not yet received enough attention. For instance, a highly self-similar structure often has a higher fractal dimension and, consequently, a larger active surface area hence, it would have a super surface performance compared to its peer. Cross-scale self-similar hierarchical micro–nano structures in living systems often provide unique features on surfaces and serve as inspiration sources for artificial materials or devices.

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