2025/11/12 by V. Torres, André Pereira, Diego Sier +7 · 1 voice
Engineering · Materials Science · Physics and Astronomy · #Graphene and Nanomaterials Applications #Graphene research and applications #Photonic Crystals and Applications
paper · pdf · doi:10.1111/jmi.70044
openalex created_date 2025/11/12 · openalex publication_date 2025/11/12 · openalex updated_date 2026/05/21
Abstract Some biological systems exhibit nanoscale constructions to produce optical effects. This study utilises Atomic Force Microscopy (AFM) and Tip‐Enhanced Raman Spectroscopy (TERS) to study the complex bionanometric structure of cicada wings. Topographical irregularities of the wings due to ‐chitin nanopillars hinder the probe's approach to the sample, a crucial step in overcoming the light diffraction limit in TERS measurements. To mitigate this issue, graphene was deposited, promoting surface smoothing and ensuring a reliable TERS measurement. Combined analyses of AFM and TERS mapping revealed a significant enhancement of the graphene 2D band, particularly in the regions surrounding the nanometric pillars, while the characteristic ‐chitin Raman peaks are evident on top of the pillars, clarifying details of how light passed through the material.