A Universal Stamping Method of Graphene Transfer for Conducting Flexible and Transparent Polymers

Abstract

Transfer method of chemically vapor deposition graphene is an appealing issue to realize its application as flexible and transparent electrodes. A universal stamping method to transfer as grown graphene from copper onto different flexible and transparent polymers (FTPs) reported here ensures simple, robust, rapid, clean and low-cost. This method relies on coating ethylene vinyl acetate (EVA) onto the as grown graphene, binding EVA coated graphene/Cu with FTPs and delamination by hydrogen bubbling process, which is analogous to the method used by stamping process where ink carries the imprint of the object onto any materials. The fate of the stamping method depends on how strongly the adhesion of EVA coated graphene/Cu with target FTPs. Interestingly, we have found that the thin film of EVA/graphene/Cu can only bind strongly with the FTPs of less than 25 µm in thickness and lower glass transition temperature value to the EVA while wide range of other FTPs are considered upon surface engineering to enhance the binding strength between FTPs and EVA. What’s more, the electrical performance was investigated with a demonstration of triboelectric nanogenerators which confirmed the reliability of graphene transfer onto the FTPs and prospect for the development of flexible and transparent electronics.

Dry-Coated Graphite onto Sandpaper for Triboelectric Nanogenerator as an Active Power Source for Portable Electronics

“…By distinguishing the output signals, GS-TENG can be used as a self-powered, active biomechanical sensor. With the ease of fabrication, flexibility, eco-friendly, biocompatibility and integration on the human body, our sandpaper-based device will be remarkable to build smart sensors of the next generation and biomechanical energy harvesters [41,42].…”

Nanomaterial Patterning in 3D Printing

“…Evaporative patterning is predominantly driven by directed assembly processes that leverage interparticle forces, friction forces, and fluid flows to pattern nanomaterial assembly. In contrast to transfer printing,241,242 such as stamping243,244 or atomic force microscopy,245 evaporative patterning can drive nanomaterial assembly without additional tools. This template‐free and lithography‐free patterning approach can be readily integrated with a wide range of extrusion‐based 3D printing technologies.…”

Fabrication of reduced graphene oxide modified poly(3,4-ethylenedioxythiophene) polystyrene sulfonate based transparent conducting electrodes for flexible optoelectronic application

“…Some of the transfer processes have been explored to deposit graphene on polymer substrates using CVD [10], however challenges remain persists in discovering suitable mechanisms for graphene films transfer on flexible substrates without developing cracks during the transfer process, obtaining large-area graphene film with a clean surface and achieving a low-cost transfer process. To undertake CVD technique issues, several solutions have been proposed for the graphene deposition [11,12]. Nevertheless, yet no process has been precise enough to deposit graphene on a flexible substrate.…”