One aspect of the present disclosure can include a method for grafting a coating polymer onto a surface of a device. The method can include the following steps: a) submerging the device into a photoinitiator solution； b) without first drying the device, submerging the device into a polymerizable solution； c) bubbling an oxygen-scavenging gas through the polymerizable solution； d) applying a UV light to the device to activate the photoinitiator, thereby grafting the coating polymer onto the device； and e) drying the device.
