Facile Fabrication of Fluorine-Free Superhydrophobic Surfaces with SiO2 Monospheres

Recently, superhydrophobic surface on various type of substrates have attracted much attentions in electronics field. In this work, the classic Stober method was used to prepare spherical silica particles with different particle sizes by adding different amounts of electrolyte (potassium chloride), giving rise to size distribution ranging from 300 nm to 2.55 mu m. Herein we constructed a micro-nano lotus-like structure in a facile way, achieving a superhydrophobic surface with using any Fluorine related chemicals. In the sense, the silica particles modified with HMDS were sprayed to prepare hydrophobic surface with contact angle up to 152.96 degrees by increasing the frequency of sprays.