Abstract: Coated articles include a substrate and a periodic mesoporous organosilica layer adhered to a surface of the substrate. The coated articles may further include a secondary silane layer covalently attached the periodic mesoporous organosilica layer. Depending on the compositions of the layers, the combination of the periodic mesoporous organosilica layer and the secondary silane layer renders the surface of the substrate superhydrophobic or omniphobic. Methods for coating a surface of a substrate include contacting the surface with a mixture of a hydrolyzed organosilane and a poloxamer and curing the mixture on the surface to form a PMO-coated substrate. The methods may further include contacting the PMO-coated article with a secondary silane coating solution of one or more silanes, then curing the secondary silane coating solution to form a dual-coated article comprising a secondary alkylsilane layer covalently attached to the periodic mesoporous organosilica layer on the surface of the substrate.