Surface tension driven flexible electronics transfer printing method

A surface tension driven flexible electronics transfer printing method, comprising the following steps:

• (1) preliminary preparation of a flexible electronic device with nanometer/micron/submillimeter thickness:
• preparing the flexible electronic device with nanometer/micron/submillimeter thickness and high accuracy based on micro and nano processes comprising photolithography and etching, and replacing rinsing solution comprising deionized water, by surfactant solution with surface tension property so that the electronic device is soaked in the surfactant solution;
• or placing the prepared flexible electronic device with nanometer/micron/submillimeter thickness on a solid surface, wherein there is only weak van der Waals force between solid surface and the flexible electronic device;
• (2) retrieving of the flexible electronic device with nanometer/micron/submillimeter thickness:
• dipping a hard ring into the surfactant solution and below the flexible electronic device, so that a portion of the flexible electronic device is attached to the ring;
• with the upward lifting of the ring, making the flexible electronic device leave the surfactant solution with the ring;
• or making a surfactant bubble supported by a capillary under internal pressure or a deformed surfactant liquid membrane supported by the ring under external wind pressure come into contact with the flexible electronic device on the solid surface so as to lift the flexible electronic device from the solid surface;
• (3) contact between the flexible electronic device with nanometer/micron/submillimeter thickness and a receiving substrate:
• moving the ring and the capillary tube to make the flexible electronic device in the surfactant liquid membrane or surfactant bubble come into contact with the receiving substrate in a transparent and “what you see is what you get” manner, to facilitate positioning and alignment;
• and meanwhile, exerting local load control to the surfactant liquid membrane for producing non-uniform diverse deformation, to conformably contact with arbitrary complex curved substrate;
• (4) printing of the flexible electronic device with nanometer/micron/submillimeter thickness:
• destroying the surfactant liquid membrane or surfactant bubble by a super-hydrophobic rod to successfully print the flexible electronic device with nanometer/micron/submillimeter thickness on the receiving substrate;
• realizing transfer printing through the easy-to-burst feature of the surfactant liquid membrane or surfactant bubble, without requirement of the interfacial adhesion switchability, so that the electronic device is transfer-printed to the substrate with extremely-low interfacial adhesion.