Direct metal nano-imprinting using embossed solid electrolyte stamp

TL;DR

This paper introduces a novel method for direct metal nanostructure patterning using embossed solid electrolyte stamps, enabling high-resolution, large-area fabrication of metal nanostructures with potential applications in nanoelectronics.

Contribution

The study demonstrates the use of superionic Ag2S stamps for direct metal patterning, including detailed analysis of stamp behavior and successful fabrication of sub-10 nm silver nano-antennas.

Findings

High feature transfer fidelity during embossing and etching

Successful fabrication of silver nano-antennas with gaps <10 nm

Large-area patterning demonstrated with stamps >6 mm in diameter

Abstract

In this paper, we report direct patterning of metal nanostructures using an embossed solid electrochemical stamp. Microforming of solid superionic stamps using Si templates-analogous to polymer patterning in nano-imprint lithography-is explored. Silver sulfide (Ag2S)-a superionic conductor with excellent micro-forming properties-is investigated as a candidate material. Important parameters of the superionic stamp, including mechanical behavior, material flow during forming, and feature recovery after embossing are studied. Excellent feature transferability during embossing as well as etching is observed. To illustrate the capability of this approach silver nano-antennas with gaps <10 nm were successfully fabricated. The possibility for large area patterning with stamp diameters >6 mm is also demonstrated. Embossing based metal patterning allows fabrication beyond two-dimensional nanofabrication and several patterning schemes are reported.