Microfabrication through Self‐Ordering of Cracks: Mechanism, Upscaling and Application for Transparent Electrodes - Matériaux Hybrides et Nanomatériaux
Article Dans Une Revue Advanced Materials Technologies Année : 2024

Microfabrication through Self‐Ordering of Cracks: Mechanism, Upscaling and Application for Transparent Electrodes

Résumé

When drying a colloidal solution, cracks appear in the resulting colloidal film. In certain cases, spontaneous order is observed, and cracks form arrays of periodic patterns. Although this phenomenon might be envisioned as a patterning method, overcoming practical challenges is necessary to transform it into a technological tool for microfabrication. This study explores various technological aspects aimed at leveraging the self-assembly of cracks as a scalable microfabrication tool for large-scale device production. Through a series of analyses, including time-resolved Grazing-Incidence Small-Angle X-Ray Scattering (GISAXS), it is offered novel insights into controlling the crack self-ordering mechanism, minimizing defects, and implementing strategies for large-scale patterning and pattern transfer. The process proves to be surprisingly robust, maintaining its efficacy with the same colloidal solution even after two years. By introducing biphasic dip-coating, large-scale crack patterns up to 100 cm2, while preserving their periodicity and ordering is achieved. As a proof of concept, the use of crack-patterned colloidal films as masks for fabricating metallic sub-micrometer objects, that serve as transparent electrodes with adjustable transparency and conductivity is showcased. Overall, this method presents significant advantages over conventional lithography, being cost-effective, versatile, environmentally friendly, and scalable, thereby offering new perspectives for diverse applications requiring cost-effective and large-scale patterning.

Domaines

Chimie
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Dates et versions

hal-04746155 , version 1 (21-10-2024)

Identifiants

Citer

Fanny Thorimbert, Ambre Brachfeld, Mateusz Odziomek, Cédric Boissière, Heinz Amenitsch, et al.. Microfabrication through Self‐Ordering of Cracks: Mechanism, Upscaling and Application for Transparent Electrodes. Advanced Materials Technologies, 2024, 9 (16), ⟨10.1002/admt.202400353⟩. ⟨hal-04746155⟩
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