Geometry‐Controlled Assembly of Self‐Standing Nanorods With Undisturbed Plasmonics

Year: 2026

Type: article

Abstract: ABSTRACT The ability to control the spatial organization of nanoscale building blocks into well‐defined architectures remains a major challenge in materials science, as collective optical, electronic, magnetic, and catalytic properties often emerge from their precise arrangement. In plasmonic systems, coupling between localized surface plasmon resonances (LSPR) enables nanoscale light manipulation, yet current assembly strategies typically produce disordered architectures that limit practical applications. Here, we report a geometry‐controlled assembly approach that directs gold@silver core–shell nanorods into vertically aligned configurations on individual colloidal templates. By exploiting a size‐dependent “magic number” effect between nanorods and templates, we precisely control interparticle spacing and orientation, preserving the intrinsic optical response of individual nanorods while enabling collective mesoscale control. This strategy provides a general framework for assembling nanostructures with tunable optical properties, bridging colloidal dispersions and functional solid‐state architectures. As a proof of concept, we demonstrate highly reproducible surface‐enhanced Raman scattering (SERS) platforms with enhancement factors exceeding 10 6 and excellent uniformity. Beyond SERS, this approach offers a versatile route for engineering plasmonic and hybrid materials for photonics, sensing, and nanoscale energy conversion, where geometry‐driven interactions determine functional performance.

Source: Advanced Science

DOI: 10.1002/advs.75726

Authors: Yoel Negrin‐Montecelo, I. Brian Becerril‐Castro, Vladimir A. Baulin, Veronica Salgueiriño, Ramon A. Alvarez‐Puebla, Miguel A. Correa‐Duarte

Institutions: Universitat Rovira i Virgili, Universidade de Vigo, Institució Catalana de Recerca i Estudis Avançats, Centro de Investigación Biomédica en Red de Salud Mental

Language: English

Topic: Gold and Silver Nanoparticles Synthesis and Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $6,730

Funders: European Commission, Ministerio de Ciencia e Innovación, Universitat Rovira i Virgili, Xunta de Galicia, Centro Singular de Investigación de Galicia, Agència de Gestió d'Ajuts Universitaris i de Recerca, Agencia Estatal de Investigación

OpenAlex ID: W7162794035