Development and characterization of graphene oxide based electronics and actuators

摘要

Emerging interests in hardware security as well as environmental concerns have given rise to the field oftransient or temporary electronics, which can be decommissioned by an external stimulus with minimal impact to thesurrounding environment. In this study, an all graphene based film is produced by a one-step deposition process. Theconversion of graphene oxide (GO) to reduced graphene oxide (rGO) depends on an interfacial reduction reaction.Control of processing conditions such as the underlying substrate, pH of GO and the film drying environment results inan ability to tailor the internal architecture of the films and their electronic properties. Furthermore, the ability to createmasks for selective reduction of GO during deposition was also demonstrated, which was used to create intricate yetwell-defined patterns and connections required in electronic circuits and devices. All graphene based freestanding filmswith selectively reduced GO were used in transient electronics application as circuitry and RFID tag patterns.Furthermore, the reversible and controllable hygromorphic actuation ability of GO films is demonstrated along withapplication in humidity sensing.