Work

Tunable Plasmonic Response of Silver Nanoparticles Entangled in Detonation Nanodiamond Network via Colloidal Self-Assembly

Year: 2025

Type: article

Abstract: Publication "Tunable Plasmonic Response of Silver Nanoparticles Entangled in Detonation Nanodiamond Network via Colloidal Self-Assembly", https://doi.org/10.1002/admi.202500461. This study explores the self-assembly of nanocomplexes formed bywell-defined 20-nm colloidal silver nanoparticles (AgNPs) with 4-nmdetonation nanodiamonds (DNDs), focusing on plasmonic resonance.Water-diluted DNDs spontaneously aggregate into chain-like structuresentangling AgNPs, forming stable nanocomplexes that sediment withinminutes but maintain their plasmonic properties even after redispersion,indicating robust interparticle bonding and interactions. While driven byelectrostatics, the binding is stabilized by surface chemistry. AgNPs becomespatially entangled yet not aggregated within the DND network, resulting in8-nm red shift of the plasmonic peak. This nanocomplex morphology issupported by transmission electron microscopy images and electromagneticnumerical simulations. Modeling shows that a 3-nm gap between AgNP andDND particles consistently reproduces experimental data, confirming thatDNDs modulate the plasmonic electromagnetic field. Moreover, theplasmonic peaks undergo pronounced intensity changes depending on AgNPconcentration: low concentrations enhance (up to +78%), whereas highconcentrations lead to suppression (down to −49%) of AgNP plasmonicabsorption, independent of DND content. The model shows that, this arisesfrom AgNP field redistribution and interference. The AgNP-DND entanglednanocomplexes thus offer a simple route to a stable hybrid nanoparticlesystem with tunable optical properties for diverse applications, frombiosensing to catalysis, energy conversion or quantum technologies

Source: Advanced Materials Interfaces

DOI: 10.5281/zenodo.17494869

Authors: Hrnčířová, Vendula, Šlapal Bařinková, Markéta, Qamar, Muhammad, Kolářová, Kateřina, Rezek, Bohuslav

Institutions: Czech Technical University in Prague, FZU - Institute of Physics of the Czech Academy of Sciences

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: $3,100

Funders: České Vysoké Učení Technické v Praze, European Commission