Deterministic Graphene Folds Through Ultra-Fast Laser Nano-texturing : A new approach to Graphene Origami - Archive ouverte HAL
Communication Dans Un Congrès Année : 2024

Deterministic Graphene Folds Through Ultra-Fast Laser Nano-texturing : A new approach to Graphene Origami

Résumé

Graphene exhibits physical and chemical properties that depend on its curvature [1,2], in this study we explore those limitations. Previously the research of creating deterministic or stochastic folds in graphene or n-layer graphene stacks has been approached through several methods. Different techniques have been tested to induce certain curvatures on graphene, such as subjecting the sample to specific environmental conditions. Nevertheless the control of these has yet to be obtained. The goal of the presented work is to create an original method for the realization of such folded graphene surfaces with tunable multiscale texturing through the use of ultra fast lasers. Inspired by the Japanese art of origami, we aimed to transform a flat 2D surface into a 3D structure and have this process open to repeatability. The idea being that with deterministic controlled pre-textured patterns we would gain customizable physical/chemical properties that would help engineer novel nano devices later on[3]. In order to transform a smooth surface into a desired nanostructured surface with a determined and controllable pattern we have used femtosecond lasers. This approach has offered us several advantages such as using tight focusing and spatial shaping for example using Bessel beams to obtain well defined holes in the elastomer at the sub-micrometric scale without relying on periodic surface generation. The advantages of using ultrashort pulses for nanopatterning over other methods are numerous: there is no chemistry involved, we eliminate the need for using in-situ experiments, we gain a lot of processing time, a lot of different patterns at the nanoscale can be attained, which makes it one of the most versatile methods for what we intend. This study brings to light our pioneering approach to create and control folds on a graphene sample, illustrating a deterministic, reversible, and repeatable process of folding and unfolding. In order to comprehensively characterize these results, we employed the use of Atomic Force Microscopy to gain insights into the topological features of the graphene folds that appear under the applied stress to the elastomer. Additionally, Raman Spectroscopy using a distinct focus on the D-band, was utilized to probe the defects (or lack thereof) generated throughout this transformative process. Our findings represent a significant advancement in the precise manipulation of graphene structures, showing promise for how these could be implemented in applications for nanotechnology and material science.
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Dates et versions

hal-04692582 , version 1 (10-09-2024)

Identifiants

  • HAL Id : hal-04692582 , version 1

Citer

Ana Florencia Juarez-Saborio, Florent Bourquard, Fabien Vialla, Vincent Barnier, Florence Garrelie, et al.. Deterministic Graphene Folds Through Ultra-Fast Laser Nano-texturing : A new approach to Graphene Origami. E-MRS 2024 Spring Meeting (symposium H), May 2024, Strasbourg, France. ⟨hal-04692582⟩
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