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dc.contributor.author
Veglia, Alicia Viviana
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dc.contributor.author
Bracamonte, Angel Guillermo
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dc.date.available
2021-02-09T16:55:53Z
dc.date.issued
2019-06
dc.identifier.citation
Veglia, Alicia Viviana; Bracamonte, Angel Guillermo; β-Cyclodextrin grafted gold nanoparticles with short molecular spacers applied for nanosensors based on plasmonic effects; Elsevier Science; Microchemical Journal; 148; 6-2019; 277-284
dc.identifier.issn
0026-265X
dc.identifier.uri
http://hdl.handle.net/11336/125212
dc.description.abstract
The detection and quantification of organic molecules is of vital importance in many areas as Biochemistry, Medicine, Environmental Chemistry, etc. The Supramolecular systems as macrocycles form host guest complexes that they can be applied to the design of Nanosensors due to their capabilities of molecular recognition. In this work it was used β-CD that it is a very well-known host for organic molecules. The βCD was attached by covalent linking over gold nanoparticle surface modified with molecular spacers. The guest studied was Rhodamine B (RhB) as a typical organic molecule that absorbs at the interval 500–600 nm that it overlaps perfectly with the gold Nanoparticles Plasmon. By this manner the selectivity of this Nanosensor works by a Supramolecular interaction and a Plasmonic complementarity. The βCD Nanoparticles grafted interact and form Nanoaggregates and depending of the state of development it was the effect obtained on the fluorescence emission. Nanoaggregates sizes below 500 nm, due to the short distances of the molecular spacers the guest emission was quenched. With higher Nanoaggregates it was measured an enhanced fluorescence emission effect based on Enhanced Plasmonics (EP) and Metal Enhanced Fluorescence (MEF). These Nanoaggregates were applied as Nanoplatforms for molecular detection. Based on these Nanoarchitectures it was possible to estimate the number of molecules detected per Nanoaggregate by NanoImaging with fluorescence microscopy. The sensitivity (m) of the Nanosensor allowed to arrive to limit of detections (LOD) close to 0.98 nM. From Fluorescence NanoImaging it was possible to detect two distribution of Nanoaggregates; the first one smaller than 500 nm and the second one higher aggregates, from where it was possible to detect at the best of the cases a minimal and a maximal number of molecules of 15 and 400 respectively per Nanoaggregate unit. In order to validate the sensitivity of the Nanosensor, it was tested in real samples of soil and water.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Β-CYCLODEXTRIN (ΒCD)
dc.subject
MOLECULAR DETECTION
dc.subject
GRAFTED GOLD NANOPARTICLES
dc.subject
PLASMONIC EFFECTS AND METAL ENHANCED
dc.subject
FLUORESCENCE (MEF)
dc.subject.classification
Otras Ciencias Químicas
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dc.subject.classification
Ciencias Químicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
β-Cyclodextrin grafted gold nanoparticles with short molecular spacers applied for nanosensors based on plasmonic effects
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-11-17T18:36:55Z
dc.journal.volume
148
dc.journal.pagination
277-284
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Veglia, Alicia Viviana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
dc.description.fil
Fil: Bracamonte, Angel Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
dc.journal.title
Microchemical Journal
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.microc.2019.04.066
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0026265X18318174
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