Soft-Support Graphene Resonator with Phononic Crystal

The development of high-performance sensors has become critically important in aviation, aerospace, and related technological fields. Graphene, with its exceptional mechanical and electrical properties, has emerged as a promising material for advancing sensor capabilities, sparking significant academic and industrial interest. As a novel sensing element, graphene-based resonators demonstrate extraordinary sensitivity owing to their atomic-scale thickness. Nevertheless, practical applications of these resonators at ambient temperatures face challenges due to insufficient environmental robustness and operational stability. These limitations are intrinsically tied to the relatively low Q-factor. To overcome this challenge, this study establishes a theoretical framework for energy dissipation dilution in graphene resonators, enabling systematic analysis of energy loss distribution patterns. Building upon this theoretical foundation, we introduce an innovative approach utilizing phononic crystal soft-support architectures to suppress vibrational energy dissipation. Through computational modeling and validation, the design and fabrication of graphene resonators incorporating these engineered support structures are optimized. This methodology not only advances fundamental understanding of energy dissipation mechanisms but also provides a practical pathway for enhancing resonator performance. The integration of phononic crystal principles offers a breakthrough in Q-factor enhancement, positioning graphene resonators as viable candidates for next-generation high-precision sensing systems.