Substrate treatments

A method of forming a substrate from a treated fiber comprising:

• filtering UV radiation having a wavelength in a range of 180 nm to 210 nm through a mask defining an opening pattern;
• exposing a surface of a fiber to the filtered UV radiation to treat a portion of the surface of the fiber wherein the surface of the fiber comprises at least one of an aromatic component and an unsaturated component;
• and
• forming a substrate from the treated fiber, wherein the substrate comprises cellulose, glass, or a combination thereof, wherein the surface of the substrate has treated portions having a roll off angle in a range of 50 degrees to 90 degrees and a contact angle in a range of 90 degrees to 180 degrees for a 50 μL water droplet when the surface of the substrate is immersed in toluene, and wherein treating the portion of the surface of the fiber results in an untreated portion of the surface of the fiber and thus the substrate, and the untreated portion of the surface of the substrate has a roll off angle between 0 degrees and 50 degrees for a 50 μL water droplet when the surface of the substrate is immersed in toluene.

A substrate comprising:

• a first surface of the substrate defining UV radiation-treated surface areas and non-UV radiation-treated surface areas, wherein the UV radiation-treated surface areas define a pattern,
• wherein the UV radiation-treated surface areas comprise at least one of an aromatic component and an unsaturated component,
• wherein the UV radiation-treated surface areas define a roll off angle in a range of 50 degrees to 90 degrees and a contact angle in a range of 90 degrees to 180 degrees for a 50 μL water droplet when the first surface is immersed in toluene,
• wherein the UV radiation-treated surface areas are treated with UV radiation having a wavelength in a range of 180 nm to 210 nm;
• and
• wherein the non-UV radiation-treated surface areas define a roll off angle between 0 degrees and 50 degrees for a 50 μL water droplet when the first surface is immersed in toluene, wherein the substrate comprises cellulose, glass, or a combination thereof.