Copper-based intersectional nanofabrication of optical nanoantennas for volatile organic compound sensing

Plasmonic sensors leverage the enhanced near-fields associated with constituent optical nanoantennas to achieve better sensing performance. The design and fabrication of these nanoantennas, especially metallic ones, are thus becoming critical steps advance this thriving important field. Low-cost high-throughput nanofabrication techniques greatly desirable. In work, we demonstrate a cost-effective method derived from conventional colloidal lithography. With polystyrene nanospheres subsequently formed copper (Cu) nanoholes as consecutive deposition masks, disk can be produced in large-scale fashion no dry etching required. Furthermore, nanodisks readily tuned via thermal heating sacrificial Cu nanohole layers. Finally, combined fabricated Au metal-organic framework material zeolitic imidazolate framework-8 demonstrated highly sensitive detection volatile organic compounds. We believe that could implemented variety plasmonic sensors.