Fabrication of disposable flexible SERS substrates by nanoimprint

SERS Active Hierarchical Nanopillar-huddle Array Fabricated via the Combination of Nanoimprint Lithography and Anodization

“…18,19 Nanoimprint lithography (NIL), as one of the template-assisted fabrication methods, has been reported to produce roughened metallic surface for LSPR induction. 20 There have been reports about SERS substrates produced via NIL [21][22][23][24] and the nanoimprinted nanofinger/nanopillar array is one of the wellstudied structures. By exposing the high aspect-ratio nanostructures to liquid, micro-capillary force promotes the collapse of the nanofingers and in result decrease the distance between two adjacent nanopillars.…”

“…The structures exhibit nanogaps within the same huddle and the substrate has comparable enhancement factors to other reports. 22,32 Given this method is low-cost, time-saving, and reliable for large area fabrication, an alternative method for fabricating SERS substrate that has huddle array generating nanogaps with relative regularity has been realized.…”

Soft nanoimprint lithography on SiO2 sol-gel to elaborate sensitive substrates for SERS detection

“…To improve performances of Soft UV-NIL, technological developments have mainly focused on new processes for mold's manufacture with new polymers, [20][21][22][23][24] new resists and anti-sticking treatment. [25][26][27] Among recent developments for NIL resists, sol-gel resist appears as an alternative.…”

Self-assembled dendrite Ag arrays with tunable morphologies for surface-enhanced Raman scattering

“…Various approaches have been employed for fabricating ordered noble metallic SERS substrates, such as template method, galvanic reaction, top-down and bottom-up micro-fabrication methods [13]. However, it still faces significant challenge to produce reproducible and uniform ordered metallic arrays for SERS substrates [14].…”