Current lithography-based microfabrication is inherently 2D and limited in the available photopatternable materials. Therefore, it is still challenging to generate 3D functional micro/nanostructures, especially hybrid 3D structures integrating different types of materials. In this talk, I will present our recent progress in the fabrication of ultrathin functional 3D microstructures composed of responsive polymers and 2D layered materials. By combining surface chemistry, molecular assembly, nanofabrication, and origami/kirigami folding, 2D materials including graphene and MoS2, can be transformed from their planar structure into well-defined ultrathin 3D structures and devices. This flexible 3D ultrathin hybrid system provides an ideal platform for biosensing and bioelectronics at the single cell level, as it affords significantly improved contact and communication with soft and irregularly shaped biological samples. We demonstrated ultrathin 3D graphene SERS biosensor which enables 3D surface chemical mapping of biological cells, as well as 3D MoS2 photodetectors with the capability of angle-resolved and reconfigurable photodetection. The dimension and internal structure of those 3D hybrid structures are widely tunable by combining various fabrication techniques including 3D printing and nanoimprint lithography.

Integration of functional polymers and 2D materials for 3D micro/nanofabrication

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.