|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Functional Nanomaterials 2023
||Epitaxial Growth of Single Crystal Nanostructure Arrays through Thermomechanical Nanomolding
||Guannan Liu, Sungwoo Sohn, Naijia Liu, Arindam Raj, Udo D. Schwarz, Jan Schroers
|On-Site Speaker (Planned)
A single-crystal structure with controlled orientation is often required for nanostructures in advanced electronic and plasmonic systems. However, fabrication of such devices has remained difficult due to either polycrystalline growth or the difficulty of integrating single crystals with substrates in desired orientations and locations to create functional devices. We present a thermomechanical method for controlled growth of single-crystal nanowire arrays that allows for simultaneous nanowire synthesis, alignment, and patterning. The substrate material diffuses into nanosized cavities under an applied pressure gradient in such diffusion-based thermomechanical nanomolding (TMNM) at a molding temperature of 0.4 times the material's melting temperature. We show vertically grown face-centered cubic nanowires with the  direction in an epitaxial relationship with the (110) substrate. The ability to control crystal structure via the substrate advances TMNM significantly, potentially allowing all FCC and BCC materials to be integrated as single crystals into devices.