Inflow nano-optics from the near-to the far-field detection based on Metal-Enhanced Fluorescence signaling

Palacios, Luna R. Gomez; Veglia, Alicia V.; Bracamonte, A. Guillermo

doi:10.1016/j.microc.2021.106539

Cited by 7 publications

(3 citation statements)

References 33 publications

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“…The silica shell addition of red shifted the gold plasmonic band to 545 nm depending on the spacer length added. This spectroscopical characteristic was already observed previously and explained by us as well other authors by an electronic confinement within a dielectric material that modifies the electronic oscillations [36]. In addition, higher sizes and nano-assemblies produce new modes of energy resonances that modify the nanoelectronic and nanoplasmonic characteristics.…”

Section: Dynamics and Plasmonics Of Multilayered Gold Core-shell Nano...supporting

confidence: 80%

Multimodal Spectroscopy Assays for Advanced Nano-Optics Approaches by Tuning Nano-Tool Surface Chemistry and Metal-Enhanced Fluorescence

Romero,

Veglia,

Amé

et al. 2024

Crystals

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In this research work, different chemical modifications were applied to gold nanoparticles and their use in enhanced non-classical light emitters based on metal-enhanced fluorescence (MEF) was evaluated. In order to achieve this, gold core–shell nanoparticles with silica shells were modified via multilayered addition and the incorporation of a covalently linked laser dye to develop MEF. Their inter-nanoparticle interactions were evaluated by using additional silica shell multilayers and modified cyclodextrin macrocycles. In this manner, the sizes and chemical surface interactions on the multilayered nanoarchitectures were varied. These optical active nanoplatforms led to the development of different nanoassembly sizes and luminescence behaviors. Therefore, the interactions and nanoassembly properties were evaluated by using various spectroscopic and nanoimaging techniques. Highly dispersible gold core–shell nanoparticles with diameters of 50–60 nm showed improved colloidal dispersion that led to single ultraluminescent gold core–shell nanoparticles with MEF. Then, the addition of variable silica lengths produced increased interactions and consequent nanoaggregation. However, the silanized nanoparticles were easily dispersible after agitation or sonication. Thus, their sizes were proportional only to the diameter and the van de Waals interaction did not affect their sizes in bulk. Then, the covalent linking of different concentrations of modified cyclodextrins was applied to the chemical surfaces by incorporating additional hydroxyl groups from the glucose monomeric unities of cyclodextrins. In this manner, variable larger-sized and inter-branched grafted gold core–shell silica nanoparticles were generated. The ultraluminescent properties were conserved due to the non-optical activity of the cyclodextrins. However, they generated enhanced ultraluminescence phenomena. Laser fluorescence microscopy nanoimaging showed enhanced resolutions in comparison to non-grafted supramolecular gold core–shell nanoparticles. The differences in their interactions and the sizes of the nanoassemblies were explained by their single nanoparticle diameters and the interacting chemical groups on their nanosurfaces. While the varied luminescence emissions generated were tuned by plasmonics, enhanced plasmonic phenomena and light scattering properties were seen depending on the type of nanoassembly. Thus, optically active and non-optically active materials led to different optical properties in the bright field and enhanced the excited state within the electromagnetic near-field of the gold nanotemplates. In this manner, it was possible to achieve high sensitivity by varying the spacer lengths and optical properties. Therefore, further perspectives regarding the design of nano-tools composed of light for various applications were discussed.

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Section: Dynamics and Plasmonics Of Multilayered Gold Core-shell Nano...supporting

confidence: 80%

Multimodal Spectroscopy Assays for Advanced Nano-Optics Approaches by Tuning Nano-Tool Surface Chemistry and Metal-Enhanced Fluorescence

Romero,

Veglia,

Amé

et al. 2024

Crystals

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“…Yet, even with a large number of related research, there are many other studies and developments that were not accomplished yet. Similarly, new ways could be applied to transmit photonics and electronic signalling within liquids and colloidal dispersions in the presence of nonclassical light Nano-emitters and semiconductors [44]. These could be considered as new approaches to studies; however, their basis is also generated from the use of Ionic Liquids within grafted substrates, Chips, and higher Hetero-junctions [45].…”

Section: Organized Systems and Self-assemblies With Incorporation Of ...mentioning

confidence: 99%

Modified Organized Systems by Incorporation of Carbon Allotropes and Derivatives for Electron Shuttle, ET, FRET, MEF, and Quantum Biology Coupling

García – Quismondo,

Bracamonte

2024

Recent Prog Mater

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In this communication, it was afforded in brief to show how high conjugated carbon based structures, and Carbon allotropes could participate as electron shuttle, semiconductors, quantum emitters and Opto-electronic processors within confined Nanostructured Organized systems. In particular was focused on Nanoassemblies such as vesicles, micelles and lipidic Nanoparticles; and incorporating as well insights from other types of Nanomaterials that could afford to develop new organized systems. It should be noted that in these cases the term organized system was used for all types of molecular assembling and Supramolecular systems that formed structures within the Nanoscale. By this manner the incorporation of Opto-electronic active materials permitted to develop very important photo-physical phenomena with high impact perspectives within technology and Life Sciences. Thus, it was leaded to discuss the participation of Carbon based chemical structures incorporated in different confined molecular media to develop i) Electron Transfer (ET) processes; ii) Reaction Electron Transfers (RET); iii) Catalysis; iv) Quantum emissions; v) Fluorescence Resonance Energy Transfer (FRET); vi) non-classical Light; and vii) Nano-Optics. Therefore, it was intended to present the most important physical and chemical phenomena where they could participate as functional high electronic conjugated chemical structures.

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“…9 ). 90 In this research, the optimal properties for MEF signaling from single nanoplatforms excited by laser application in in-flow colloidal dispersions were studied. Thus, drastic signal modifications were achieved, depending on the main MEF parameters such as spacer length from the gold core, concentration of laser dyes incorporated, and excitations applied.…”

Section: Insights Into Nano-optics For In-flow Devices and Chips For ...mentioning

confidence: 99%

Development of nano- and microdevices for the next generation of biotechnology, wearables and miniaturized instrumentation

Palacios

Bracamonte

2022

RSC Adv.

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Inflow nano-optics from the near-to the far-field detection based on Metal-Enhanced Fluorescence signaling

Cited by 7 publications

References 33 publications

Multimodal Spectroscopy Assays for Advanced Nano-Optics Approaches by Tuning Nano-Tool Surface Chemistry and Metal-Enhanced Fluorescence

Multimodal Spectroscopy Assays for Advanced Nano-Optics Approaches by Tuning Nano-Tool Surface Chemistry and Metal-Enhanced Fluorescence

Modified Organized Systems by Incorporation of Carbon Allotropes and Derivatives for Electron Shuttle, ET, FRET, MEF, and Quantum Biology Coupling

Development of nano- and microdevices for the next generation of biotechnology, wearables and miniaturized instrumentation

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