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.

Abstract: Polydiacetylene (PDA) coatings are fabricated on porous membranes, specifically on membranes that have been pretreated or post treated by exposure to additional materials. In addition, the surface of the deposited diacetylene and PDA coatings can be modified.

Abstract: Supported three-dimensional arrays of a polydiacetylene backbone bonded to and supported by a solid support in a sample are provided. The bonding is achieved by providing a support having thiol and/or amine groups and epoxy groups and/or maleimide groups, and a polydiacetylene backbone containing the other of thiol and/or amine groups or the epoxy and/or maleimide groups for reacting with the corresponding thiol groups or epoxy groups and/or maleimide groups on the support; provided that when an amine is used the other group is an epoxy; and/or having a layer of a polyelectrolyte on the support; and/or having a multiple atom linker between the three-dimensional array of the polydiacetylene backbone and the solid support.