ArticleACS nanoscience Au2026
Mismatch-Tuned Plasmonic Nanogap Networks on Block Copolymers for Ultrasensitive Nucleic Acid Quantification.
Article in ACS nanoscience Au, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
In localized surface plasmon resonance (LSPR), rational nanogap engineering in metallic nanostructures enables strong plasmonic coupling and efficient confinement of incident electromagnetic fields, thereby significantly enhancing optical responses for biosensing applications. Traditional approaches to fabricating small gaps have relied on localizing dielectric spacers between gold nanoparticles (AuNPs). However, doing so has encountered challenges in producing high-density, clean gaps across large surface areas. Here, we demonstrate a straightforward, self-assembly-guided method for the consistent fabrication of topologically anchored AuNPs featuring sub-5 nm nanogaps, arranged on a nanostructured block copolymer template. The solution-based method enables time-dependent tuning toward high plasmonic coupling density, resulting in an extensive number of hotspots, with an equivalent sensing enhancement factor (ESEF) exceeding that of thermally annealed gold nanoisland chips by 1 × 10
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