3D Characterization and Plasmon Mapping of Gold Nanorods Welded by Femtosecond Laser Irradiation
Source abstract
Abstract
Ultrafast laser irradiation can induce morphological and structural changes in plasmonic nanoparticles. Gold nanorods (Au NRs), in particular, can be welded together upon irradiation with femtosecond laser pulses, leading to dimers and trimers through the formation of necks between individual nanorods. We used electron tomography to determine the 3D (atomic) structure at such necks for representative welding geometries and to characterize the induced defects. The spatial distribution of localized surface plasmon modes for different welding configurations was assessed by electron energy loss spectroscopy. Additionally, we were able to directly compare the plasmon line width of single-crystalline and welded Au NRs with single defects at the same resonance energy, thus making a direct link between the structural and plasmonic properties. In this manner, we show that the occurrence of (single) defects results in significant plasmon broadening.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Laser-Ablation Synthesis of Nanoparticles · Gold and Silver Nanoparticles Synthesis and Applications · Nonlinear Optical Materials Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
CIC biomaGUNE, Basque Research and Technology Alliance (BRTA), Paseo de Miramón 182, 20014 Donostia-San Sebastián, Spain
Departamento de Química Física, Universidad Complutense de Madrid, Avenida Complutense s/n, 28040 Madrid, Spain
CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Paseo de Miramón 182, 20014 Donostia-San Sebastián, Spain
Ikerbasque (Basque Foundation for Science), 48013 Bilbao, Spain
Funding
Comunidad de Madrid · Ministerio de Ciencia, Innovaci?n y Universidades · Ministerio de Econom?a y Competitividad · H2020 Marie Sklodowska-Curie Actions · Fonds Wetenschappelijk Onderzoek · H2020 Research Infrastructures · H2020 European Research Council · Agencia Estatal de Investigaci?n, Ministerio de Ciencia, Innovaci?n y Universidades
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