Journal
NANOSCALE
Volume 10, Issue 21, Pages 9867-9879Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8nr01001c
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Funding
- National Natural Science Foundation of China [51475081, 51675085]
- Science Fund for Creative Research Groups of NSFC [51621064]
- Fundamental Research Funds for the Central Universities [DUT18LAB17]
- Collaborative Innovation Center of Major Machine Manufacturing in Liaoning
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Controlled patterning of nanostructures at desired positions is of great importance for high-performance M/NEMS devices. Here, we demonstrate a high-resolution, high-speed and cost-effective fabrication method, named coaxial focused electrohydrodynamic jet printing, to print functional nanostructures. A coaxial needle was designed and developed; a functional ink and high viscosity liquid are applied in the inner and outer needle, respectively. Under optimised conditions, a stable coaxial jet is formed; then, the electrical shearing force and electrical field induce viscous shearing force and internal pressure that are jointly applied on the inner functional ink, focusing the inner jet on the nanoscale. Using this stable coaxial jet with a nano-jet inside it, nanostructures with highly aligned nanowire arrays, nano-freebeams and nano-cantilever beams down to the scale of 40 nm were directly printed. The needle size was 130 mu m, and the ratio of the sizes of the needle and the printed structure was as high as 3250/1 This technique realizes the controllable printing of nanoscale structures with the use of a one hundred micrometer-sized needle. The printed PZT nanostructures exhibit pure perovskite structures and distinct piezoelectric responses.
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