Abstract
In the field of printed electronics, there is a pressing need for printable resistors, particularly ones where the resistance can be varied without changing the size of the resistor. This work presents ink synthesis and printing results for variable resistance, inkjet-printed patterns of a novel and sustainable carbon nanomaterial—multilayer graphene nanoshells. Dispersed multilayer graphene nanospheres are sterically stabilized by a surfactant (Triton X100), and no post-process is required to achieve the resistive functionality. A surface tension-based adsorption analysis technique is used to determine the optimal surfactant dosage, and a geometric model explains the conformation of adsorbed surfactant molecules. The energetic interparticle potentials between approaching particles are modeled to assess and compare the stability of sterically and electrostatically stabilized multilayer graphene nanoshells. The multilayer graphene nanoshell inks presented here show a promising new pathway toward sustainable and practical printed resistors that achieve variable resistances within a constant areal footprint without post-processing.
Highlights
The flexible electronics industry is well on its way to becoming mainstream
The unique characteristics of flexible electronic platforms promise transformative and disruptive improvements in many applications ranging from aerospace and defense [1] to human- [2,3,4,5,6,7] and structural-health monitoring [8,9] and distributed sensor systems [10,11,12]
Flexible electronics device manufacturing requires depositing a functional material in a specified pattern on a flexible substrate
Summary
The flexible electronics industry is well on its way to becoming mainstream. Flexible electronics have appealing characteristics, such as thin, lightweight, and conformable form factors, low-cost manufacturing, environmentally friendly materials, and rapid prototyping.The unique characteristics of flexible electronic platforms promise transformative and disruptive improvements in many applications ranging from aerospace and defense [1] to human- [2,3,4,5,6,7] and structural-health monitoring [8,9] and distributed sensor systems [10,11,12].Flexible electronics device manufacturing requires depositing a functional material in a specified pattern on a flexible substrate. Flexible electronics have appealing characteristics, such as thin, lightweight, and conformable form factors, low-cost manufacturing, environmentally friendly materials, and rapid prototyping. The unique characteristics of flexible electronic platforms promise transformative and disruptive improvements in many applications ranging from aerospace and defense [1] to human- [2,3,4,5,6,7] and structural-health monitoring [8,9] and distributed sensor systems [10,11,12]. Flexible electronics device manufacturing requires depositing a functional material in a specified pattern on a flexible substrate. Printing processes are well-suited for such deposition if the desired functional material can be made in the form of an ink. There are critical materials, processing, and device structure challenges for printable, flexible electronics
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