F. Marabelli
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View article: Enhanced photoluminescence of organic dyes embedded in sol-gel organosilane thin films
Enhanced photoluminescence of organic dyes embedded in sol-gel organosilane thin films Open
We investigated photoluminescence properties of Dyomics dyes DY650 and DY831 when incorporated into solid thin films fabricated using two distinct sol–gel precursors, namely, tetraethoxysilane (TEOS) and 3-glycidoxypropyltrimethoxysilane (…
View article: Angle-Resolved Fluorescence of a Dye Coupled to a Plasmonic Nanohole Array
Angle-Resolved Fluorescence of a Dye Coupled to a Plasmonic Nanohole Array Open
Gold nanohole arrays are periodic metasurfaces that are gathering huge interest in biosensing applications. The bi-dimensional grating-like structure defines their plasmonic response, together with the corresponding mode of angular dispers…
View article: Angle-Resolved Optical Characterization of a Plasmonic Triangular Array of Elliptical Holes in a Gold Layer
Angle-Resolved Optical Characterization of a Plasmonic Triangular Array of Elliptical Holes in a Gold Layer Open
Plasmonic arrays are grating-like structures able to couple an incoming electromagnetic field into either localized or propagating surface plasmonic modes. A triangular array of elliptical holes in a gold layer were realized resorting to d…
View article: Angle-Resolved Fluorescence of a Dye Coupled to a Plasmonic Nanohole Array
Angle-Resolved Fluorescence of a Dye Coupled to a Plasmonic Nanohole Array Open
Gold nanohole arrays are periodic metastructures gathering huge interest for biosensing applica-tions. The grating-like structure defines their plasmonic mode features and their angular disper-sion can be used to highlight efficiently thei…
View article: Nanofabrication Process Scale-Up via Displacement Talbot Lithography of a Plasmonic Metasurface for Sensing Applications
Nanofabrication Process Scale-Up via Displacement Talbot Lithography of a Plasmonic Metasurface for Sensing Applications Open
The selection of an affordable method to fabricate plasmonic metasurfaces needs to guarantee complex control over both tunability and reproducibility of their spectral and morphological properties, making plasmonic metasurfaces suitable fo…
View article: Design of an optical sensor based on organic optoelectronics and nanoplasmonics for multiplex and multimodal detection
Design of an optical sensor based on organic optoelectronics and nanoplasmonics for multiplex and multimodal detection Open
—On-site analysis of multiple analytes from different classes (such as heavy metals, proteins and small molecules), at the sensitivity required for a selected application, is a hard technological challenge. In this context, optical sensing…
View article: Convergence and Performance Analysis of a Particle Swarm Optimization Algorithm for Optical Tuning of Gold Nanohole Arrays
Convergence and Performance Analysis of a Particle Swarm Optimization Algorithm for Optical Tuning of Gold Nanohole Arrays Open
Gold nanohole arrays, hybrid metal/dielectric metasurfaces composed of periodically arranged air holes in a thick gold film, exhibit versatile support for both localized and propagating surface plasmons. Leveraging their capabilities, part…
View article: Fluorescence emission angular dependence on a nanostructured plasmonic grating
Fluorescence emission angular dependence on a nanostructured plasmonic grating Open
Plasmonic gratings provide an advantageous platform for fluorescence sensing due to their compatibility with functionalization techniques, imaging detection, and the potential for signal enhancement. Among traditional fluorescence detectio…
View article: Fluorescence Enhancement Dependence on Refractive Index Variation in a Nanostructured Plasmonic Surface
Fluorescence Enhancement Dependence on Refractive Index Variation in a Nanostructured Plasmonic Surface Open
Nanostructured plasmonic surfaces have been the subject of many biosensing applications exploiting surface-enhanced fluorescence in the last few years. For this reason, we investigated the refractive index dependence of the coupling mechan…
View article: Particle Swarm Optimization Algorithm for Gold Nanohole Array Design
Particle Swarm Optimization Algorithm for Gold Nanohole Array Design Open
Gold nanohole arrays represent a class of bidimensional plasmonic metasurfaces that are suitable for realizing optical sensors. We propose a modeling approach based on a customized particle swarm optimization algorithm implemented in the c…
View article: Plasmonic Nanostructure Functionalization for Surface-Enhanced Fluorescence Bio-Detection
Plasmonic Nanostructure Functionalization for Surface-Enhanced Fluorescence Bio-Detection Open
Plasmonic nanostructures represent a suitable platform for the detection of biomolecule interactions. Their surface functionalization can be performed through different strategies. Optimal thickness, homogeneity, and hydrophilicity of the …
View article: A Fully Integrated Miniaturized Optical Biosensor for Fast and Multiplexing Plasmonic Detection of High‐ and Low‐Molecular‐Weight Analytes
A Fully Integrated Miniaturized Optical Biosensor for Fast and Multiplexing Plasmonic Detection of High‐ and Low‐Molecular‐Weight Analytes Open
Optical biosensors based on plasmonic sensing schemes combine high sensitivity and selectivity with label‐free detection. However, the use of bulky optical components is still hampering the possibility of obtaining miniaturized systems req…
View article: Refractive Index Dependence of Fluorescence Enhancement in a Nanostructured Plasmonic Grating
Refractive Index Dependence of Fluorescence Enhancement in a Nanostructured Plasmonic Grating Open
Plasmonic gratings are attracting huge interest in the context of realizing sensors based on surface-enhanced fluorescence. The grating features control the plasmonic modes and consequently have a strong effect on the fluorescence response…
View article: Plasmonic Modes and Fluorescence Enhancement Coupling Mechanism: A Case with a Nanostructured Grating
Plasmonic Modes and Fluorescence Enhancement Coupling Mechanism: A Case with a Nanostructured Grating Open
The recent development and technological improvement in dealing with plasmonic metasurfaces has triggered a series of interesting applications related to sensing challenges. Fluorescence has been one of the most studied tools within such a…
View article: Organic Light‐Emitting Transistors in a Smart‐Integrated System for Plasmonic‐Based Sensing
Organic Light‐Emitting Transistors in a Smart‐Integrated System for Plasmonic‐Based Sensing Open
The smart integration of multiple devices in a single functional unit is boosting the advent of compact optical sensors for on‐site analysis. Nevertheless, the development of miniaturized and cost‐effective plasmonic sensors is hampered by…
View article: Angular dependence and absorption properties of the anapole mode of Si nano-disks
Angular dependence and absorption properties of the anapole mode of Si nano-disks Open
The polarization- and angle-resolved optical responses of the anapole mode in silicon nano-disks array have been experimentally and theoretically investigated. The good agreement between measured data and simulations yields to a consistent…
View article: Evidence of double-loop hysteresis in disordered ferroelectric crystal
Evidence of double-loop hysteresis in disordered ferroelectric crystal Open
Double-loop electric-field vs polarization hysteresis is investigated in a depoled compositionally disordered lithium-enriched potassium tantalate niobate crystal. Comparing electro-optic response and dielectric spectroscopy indicates that…
View article: Plasma Fabrication and SERS Functionality of Gold Crowned Silicon Submicrometer Pillars
Plasma Fabrication and SERS Functionality of Gold Crowned Silicon Submicrometer Pillars Open
Sequential plasma processes combined with specific lithographic methods allow for the fabrication of advanced material structures. In the present work, we used self-assembled colloidal monolayers as lithographic structures for the conforma…
View article: Nanostructured Organic/Hybrid Materials and Components in Miniaturized Optical and Chemical Sensors
Nanostructured Organic/Hybrid Materials and Components in Miniaturized Optical and Chemical Sensors Open
In the last decade, biochemical sensors have brought a disruptive breakthrough in analytical chemistry and microbiology due the advent of technologically advanced systems conceived to respond to specific applications. From the design of a …
View article: Strong Modulations of Optical Reflectance in Tapered Core–Shell Nanowires
Strong Modulations of Optical Reflectance in Tapered Core–Shell Nanowires Open
Random assemblies of vertically aligned core–shell GaAs–AlGaAs nanowires displayed an optical response dominated by strong oscillations of the reflected light as a function of the incident angle. In particular, angle-resolved specular refl…
View article: Porous Silicon Bragg Reflector and 2D Gold-Polymer Nanograting: A Route Towards a Hybrid Optoplasmonic Platform
Porous Silicon Bragg Reflector and 2D Gold-Polymer Nanograting: A Route Towards a Hybrid Optoplasmonic Platform Open
Photonic and plasmonic systems have been intensively studied as an effective means to modify and enhance the electromagnetic field. In recent years hybrid plasmonic–photonic systems have been investigated as a promising solution for enhanc…
View article: Polymer Distributed Bragg Reflectors for Vapor Sensing
Polymer Distributed Bragg Reflectors for Vapor Sensing Open
We establish a new strategy to achieve fast and responsive hybrid distributed Bragg reflectors for environmental vapor sensing. We fabricated easily processable zinc oxide–polystyrene nanocomposites to grow high quality multilayers with la…
View article: Synergic combination of the sol–gel method with dip coating for plasmonic devices
Synergic combination of the sol–gel method with dip coating for plasmonic devices Open
Biosensing technologies based on plasmonic nanostructures have recently attracted significant attention due to their small dimensions, low-cost and high sensitivity but are often limited in terms of affinity, selectivity and stability. Con…
View article: A multiplexed label free plasmonic nano-device for near infrared applications
A multiplexed label free plasmonic nano-device for near infrared applications Open
The development of a new surface plasmon resonance (SPR) imaging biosensor is reported. The biosensor exploits the optical properties of a nano-structured gold-polymer chip, which allows for the coupling of the SPR with the incident light.…