Тип публикации: статья из журнала
Год издания: 2026
Идентификатор DOI: 10.1088/1402-4896/ae4f2e
Аннотация: <jats:title>Abstract</jats:title> <jats:p>Gold nanoparticles (AuNPs) exhibit unique optical properties due to localized surface plasmon resonance (LSPR), making them valuable for applications in nanophotonics, sensing, and biomedicine. This study investigates the formation of ordered AuNP monolayers on Au/Si(100) substrates with coПоказать полностьюntrolled roughness prepared by magnetron sputtering and thermal evaporation. We examine how substrate morphology influences nanoparticle organization and analyze collective optical properties using reflection spectroscopy. Ordered AuNP ensembles were formed at the air/water interface and transferred onto Au/Si(100) substrates. Our results demonstrate that substrate roughness significantly affects monolayer packing density and uniformity. Reflection spectra revealed two characteristic resonances: an LSPR peak at ∼525 nm and a low-energy resonance at ∼800 nm associated with collective particle–substrate interactions. Significantly, encapsulation with cetyltrimethylammonium chloride (CTAC) molecules suppressed the long-wavelength resonance. Comparative analysis with colloidal AuNP dimers suggests charge-mediated interactions in plasmon resonance formation. These findings demonstrate effective control of collective plasmonic modes through substrate morphology tuning and nanoparticle surface functionalization, offering promising avenues for developing advanced optical materials and sensor platforms.</jats:p>
Журнал: Physica Scripta
Выпуск журнала: Т. 101, № 14
Номера страниц: 145913
ISSN журнала: 00318949
Издатель: Royal Swedish Academy of Sciences