Enabling a novel approach to a controlled fabrication of 1D crystalline nanowires on suspended microstructures of arbitrary geometries using two direct-writing technologies. (December 2022)

• Record Type: Journal Article
• Authors: McCormack, K.; Schaper, N.; Kim, Y.; Hensley, D.K.; Kravchenko, I.; Lavrik, N.V.; Gosztola, D.J.; Pantano, M.F.; Kuljanishvili, I.
• Is Part Of: Materials today nano. Volume 20(2022)
• Publication Date: 2022-12
• Subjects: Nanostructures -- ZnO NWs -- Nanofabrication -- Two-photon (2PP) lithography -- Direct-write patterning (DWP) -- CVD synthesis; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Nanoscience; Nanotechnology -- Periodicals; Periodicals; Periodical; Electronic journals; Electronic journals; 620.5
• DOI: 10.1016/j.mtnano.2022.100241
• Languages: English
• ISSNs: 2588-8420

Abstract

Abstract: Recent progresses in additive manufacturing have inspired new technologies, such as direct laser writing technique, based on two-photon polymerization (2 PP), which complements and further enriches the nanofabrication tools portfolio. In this work, we combine 2 PP and our mask-free scanning probe assisted 'direct-write patterning' (DWP) method to allow for: a) the fabrication of micro-bridge structures with sub-micrometer resolution, b) selective synthesis of crystalline ZnO nanowires at predefined locations, respectively. This synergistic approach enables cantilever probe patterning of catalysts directly on suspended micro-bridges for in-situ CVD growth of nanoscale material, in a templated manner. The study reported here represents the first proof-of-concept experiments demonstrating versatile and scalable methodology, which can be applied and straightforwardly extended to grow a variety of other nanomaterials, in a controlled and selective fashion, on freestanding micro/nanoscale structures, whose size and geometry can be conveniently varied via templating of sacrificial 2 PP polymeric scaffolds. Finally, the demonstration of the possibility to integrate this new approach with the conventional lithography techniques provides a step forward to the development of the novel class of hybrid polymer-silicon-1D or -2D materials, and systems. The quality of the produced ZnO nanowire assemblies was assessed using several physical characterization methods.