Ubiquitous sensing is a rapidly emerging field that requires the installation of vast quantities of small, cheap electronic devices on surfaces of all types, including fragile or biological surfaces. Since in many cases, electronics cannot be directly built or processed on these types of surfaces, a method is needed to build these electronic devices and subsequently transfer them onto their target substrates. We have shown that chemically hydrogenated graphene is capable of delaminating cleanly from its substrate while retaining any functional groups it has as well as many delicate physical properties such as magnetic characteristics. This occurs because hydrogenation weakens the van der Waals adhesive force between graphene and its substrate. We further show that electronically active devices, including a graphene ribbon FET and an ammonia gas sensor, can be constructed directly on hydrogenated graphene and transferred to a variety of surfaces with retention of functionality. This transfer is mild, non-toxic, biocompatible, and involves exposing the surface only to water. Transfer techniques like these will be essential for maximizing the deployment of small electronic devices for ubiquitous sensing.

Constructing transferrable electronics on functionalized graphene

2019 Spring National Meeting

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