Nanorod-based plasmonic substrates with predefined optical resonances
To design and fabricate plasmonic substrates to be used in ultrasensitive chemical sensing or surfaceenhanced spectroscopies, it is important to achieve control on the morphology, dimensions and surface density of metallic nanostructures on the substrate, and therefore to achieve control on their...
| Autores principales: | , |
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| Formato: | Documento de conferencia publishedVersion |
| Lenguaje: | Inglés |
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2019
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| Acceso en línea: | http://hdl.handle.net/20.500.12272/3764 |
| Aporte de: |
| id |
I68-R174-20.500.12272-3764 |
|---|---|
| record_format |
dspace |
| institution |
Universidad Tecnológica Nacional |
| institution_str |
I-68 |
| repository_str |
R-174 |
| collection |
RIA - Repositorio Institucional Abierto (UTN) |
| language |
Inglés |
| topic |
UTN FRD Plasmonic substrates metallic nanostructures |
| spellingShingle |
UTN FRD Plasmonic substrates metallic nanostructures Scarpettini, Alberto Gutierrez, Marina Nanorod-based plasmonic substrates with predefined optical resonances |
| topic_facet |
UTN FRD Plasmonic substrates metallic nanostructures |
| description |
To design and fabricate plasmonic substrates to be used in ultrasensitive chemical sensing or surfaceenhanced
spectroscopies, it is important to achieve control on the morphology, dimensions and
surface density of metallic nanostructures on the substrate, and therefore to achieve control on their
optical resonances. In this direction, monodisperse colloidal gold nanorods were synthesized in a
seed-mediated growth [1] with a longitudinal surface plasmon resonance tunable in wavelengths from
600 to 1000 nm. These nanorods with well-controlled size and aspect ratio were used as plasmonic
building blocks. Glass substrates were chemically modified and the synthesized gold nanorods were
adsorbed through a dipping process [2].
The nanostructured coverage dynamics of these substrates was characterized by spectrophotometry
and electron microscopy (Fig. 1). A nanoparticle surface aggregation was observed during the
coverage process at long times. This aggregation is dominated by the mobility of the isolated
nanorods, which first join in dimers and, further in time, in clusters of higher number of nanorods,
changing from well-defined longitudinal plasmons to more complex coupling resonances. Evolution
of amplitudes of resonance peaks in extinction spectra and nanorod counting statistics were used to
model both coverage and aggregation processes [3]. Their characteristic times and saturation values
were analyzed and related with kinetic parameters and nanorod extinction coefficients. This work can
be used as a predictive tool to prepare plasmonic substrates with desired optical resonances. |
| format |
Documento de conferencia publishedVersion Documento de conferencia |
| author |
Scarpettini, Alberto Gutierrez, Marina |
| author_facet |
Scarpettini, Alberto Gutierrez, Marina |
| author_sort |
Scarpettini, Alberto |
| title |
Nanorod-based plasmonic substrates with predefined optical resonances |
| title_short |
Nanorod-based plasmonic substrates with predefined optical resonances |
| title_full |
Nanorod-based plasmonic substrates with predefined optical resonances |
| title_fullStr |
Nanorod-based plasmonic substrates with predefined optical resonances |
| title_full_unstemmed |
Nanorod-based plasmonic substrates with predefined optical resonances |
| title_sort |
nanorod-based plasmonic substrates with predefined optical resonances |
| publishDate |
2019 |
| url |
http://hdl.handle.net/20.500.12272/3764 |
| work_keys_str_mv |
AT scarpettinialberto nanorodbasedplasmonicsubstrateswithpredefinedopticalresonances AT gutierrezmarina nanorodbasedplasmonicsubstrateswithpredefinedopticalresonances |
| bdutipo_str |
Repositorios |
| _version_ |
1764820552296431618 |