Giovanna Palermo

Giovanna Palermo
Università della Calabria | Università della Calabria · Department of Physics

PhD in Physics

About

59
Publications
7,216
Reads
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497
Citations
Citations since 2016
50 Research Items
487 Citations
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
Introduction
Giovanna Palermo currently works at the Department of Physics, University of Calabria. Giovanna does research in Applied Physics. Her current project is in Biosensing.

Publications

Publications (59)
Conference Paper
Thanks to an optimized nanostructures arrangement , we report on temperature variation of 250 • C by impinging a plasmonic device with a green laser radiation. This great temperature value is caused by the strong confinement of electric field that is due to the covering gold nano heaters with a layer of polymer + dye. A chopper-modulated impinging...
Article
Full-text available
In this study, polyelectrolyte (PE) layers are deposited on substrates made by glass covered with an array of gold nanoparticles (GNPs). In particular, the samples studied have 0 PE layers (GGPE0), 3 PE layers (GGPE3), 11 PE layers (GGPE11), and 21 PE layers (GGPE21). All samples have been studied by micro-Raman spectroscopy. An acetic acid solutio...
Article
Metasurfaces have been extensively engineered to produce a wide range of optical phenomena, allowing exceptional control over the propagation of light. However, they are generally designed as single-purpose devices without a modifiable postfabrication optical response, which can be a limitation to real-world applications. In this work, we report a...
Preprint
Full-text available
Metasurfaces have been extensively engineered to produce a wide range of optical phenomena, allowing unprecedented control over the propagation of light. However, they are generally designed as single-purpose devices without a modifiable post-fabrication optical response, which can be a limitation to real-world applications. In this work, we report...
Article
Full-text available
The scientific effort to control the interaction between light and matter has grown exponentially in the last two decades. This growth has been aided by the development of scientific and technological tools enabling the manipulation of light at deeply sub‐wavelength scales, unlocking a large variety of novel phenomena spanning traditionally distant...
Article
Glioblastoma multiforme (GBM) is one of the deadliest and most aggressive cancers, remarkably resilient to current therapeutic treatments. Here, we report preliminary in vivo studies of GBM treatments based on photo-nanotherapeutics to activate synergistic killing mechanisms. Core-shell nanoparticles have been weaponized by combining photophysical...
Article
Full-text available
This work reports the study of two-photon induced properties of a highly luminescent cyclometalated Ir(III) complex, [Ir(ppy)2(en)] OOCCH3 (1), ppy = 2-phenylpyridine, en = ethylenediamine. Steady-state and time-resolved fluorescence measurements were performed by exciting 1 at the biologically relevant wavelength of 800 nm, whereas, the generation...
Article
Full-text available
An inverted pyramidal metasurface was designed, fabricated, and studied at the nanoscale level for the development of a label-free pathogen detection on a chip platform that merges nanotechnology and surface-enhanced Raman scattering (SERS). Based on the integration and synergy of these ingredients, a virus immunoassay was proposed as a relevant pr...
Article
Full-text available
Plasmonic nanoheaters are reported that produce a significant local heating when excited by a 532 nm wavelength focused laser beam. A significant temperature increase derives from the strong confinement of electric field enabled by the specific arrangement of Au nanodisks constituting the nanoheater. The thermal response is much more sensitive when...
Article
Full-text available
We experimentally demonstrate that the plasmonic heat delivered by a single layer of homogeneously distributed gold nanoparticles (AuNPs), immobilized on a glass substrate, can be optically tuned by taking advantage of the properties of an organic layer based on azobenzene and nematic liquid crystal (NLC) molecules. The effect, which exploits the d...
Preprint
Plasmonic nanoheaters are reported that produce a significant local heating when excited by a 532 nm wavelength focussed laser beam. A significant temperature increase derives from the strong confinement of electric field enabled by the specific arrangement of Au nanodisks constituting the nanoheater. The thermal response is much more sensitive whe...
Preprint
Full-text available
Glioblastoma multiforme (GBM) is one of the deadliest and most aggressive cancers, remarkably resilient to current therapeutic treatments. Here, we report in vivo studies of GBM treatments based on photo-nanotherapeutics able to induce synergistic killing mechanisms. Core-shell nanoparticles have been weaponized by combining the photophysical prope...
Article
Full-text available
Sensor technology has become increasingly crucial in medical research and clinical diagnostics to directly detect small numbers of low-molecular-weight biomolecules relevant for lethal diseases. In recent years, various technologies have been developed, a number of them becoming core label-free technologies for detection of cancer biomarkers and vi...
Chapter
DESCRIPTION In recent years, the biomolecular recognition of proteins and genetic fragments such as DNA and RNA is attracting a great deal of attention in the development of diagnostic protocols for infectious and tumor diseases. The intrinsic chirality of matter has always represented an interesting challenge in the design of nanomaterials and met...
Article
In this paper, we describe how it is possible to harness the photo-thermal effects occurring in metallic nanoparticles to develop molecular sensors. In particular, we numerically demonstrate how a change of the surrounding medium affects the localized surface plasmon resonance with a consequent shift of the corresponding resonance wavelength, enabl...
Article
Significance Nanostructured metamaterials have been engineered to generate a wide range of optical phenomena, allowing an unprecedented control over the propagation of light. However, they are generally designed as single-purpose devices without a modifiable optical response, which can be a barrier to applications. In this work, we report the nontr...
Article
Photon-mediated interactions in quantum systems represent a crucial point in quantum mechanics for the design and analysis of scalable quantum information systems. In this communication we numerically demonstrate that quantum emitters can interact coherently with a sub-wavelength plasmonic nano-cavity. In particular, we report how the interplay bet...
Article
In recent times, biomolecular sensing to recognize genetic fragments and proteins is spurring unprecedented interest as diagnostic protocol for cancer and infectious diseases. Significant efforts have been made to design nanomaterials able to control the light-matter interaction at the single nanometer scale, where genes and proteins bind specifica...
Preprint
In recent years significant efforts have been made to design and fabricate functional nanomaterials for biomedical applications based on the control of light matter interaction at the nanometer scale. Among many other artificial materials, hyperbolic dispersion metamaterials allow to access unprecedented physical effects and mechanisms due to the e...
Preprint
Full-text available
In this paper, we present a simple and robust numerical method able to predict, with high accuracy, the photo-thermal effects occurring for a gold nanoparticles arrangement under externally applied strain. The physical system is numerically implemented in the COMSOL Multiphysics simulation platform. The gold nanoparticles distributions are excited...
Article
Full-text available
In recent years a wide interest has been spurred by the inverse design of artificial materials for nano-biophotonic applications. In particular, the extreme optical properties of artificial hyperbolic dispersion nanomaterials allowed to access new physical effects and mechanisms. The unbound isofrequency surfaces of hyperbolic metamaterials and met...
Article
In this paper, we present a simple and robust numerical method capable of predicting, with high accuracy, the thermal effects occurring for different gold nanoparticle arrangements under externally applied strain. The physical system is numerically implemented in the COMSOL Multiphysics simulation platform. The photothermal response of different ar...
Preprint
Full-text available
A simple and robust method able to predict, with high accuracy, the optical properties of single and multi-layer nanostructures is presented. The method exploits a COMSOL Multiphysics simulation platform and it has been validated by three case studies with increasing numerical complexity: i) a single thin layer (20 nm) of Ag deposited on a glass su...
Method
A simple and robust method able to predict, with high accuracy, the optical properties of single and multi-layer nanostructures is presented. The method exploits a COMSOL Multiphysics simulation platform and it has been validated by three case studies with increasing numerical complexity: i) a single thin layer (20 nm) of Ag deposited on a glass su...
Conference Paper
Full-text available
In this contribution, we show how it is possible to rigorously predict strain-related phenomena in case of plasmonic systems made of arrangements of metallic nanoparticles immobilized on a flexible elastomeric tape. This insight allows the study of the thermal response of the system and of the heat photogenerated at the nanoscale. Results evidence...
Article
Full-text available
A simple and robust method able to evaluate and predict, with high accuracy, the optical properties of single and multi-layer nanostructures is presented. The method was implemented using a COMSOL Multiphysics simulation platform and it has been validated by four case studies with increasing numerical complexities: (i) a single thin layer (20 nm) o...
Poster
Full-text available
A simple and robust method able to calculate and predict, with high accuracy, the optical properties of single and multi-layer materials by exploiting a Comsol Multiphysics simulation platform is presented. For each considered material, it is possible to extract physical quantities of interest like reflectance, transmittance and Brewster angle, for...
Poster
Full-text available
Research interest on materials and methods to control the nanoscale response of resonant nanostructures is relevant for the potential application in tunable and reconfigurable devices. Typical approaches promote the interplay between external macroscale stimuli (mechanic, thermal, acoustic, electric, and chemical) and plasmonic systems to achieve n...
Article
Research interest on materials and methods to control the nanoscale response of resonant nanostructures is relevant for the potential application in tunable and reconfigurable devices. Typical approaches promote the interplay between external macroscale stimuli (mechanic, thermal, acoustic, electric, and chemical) and plasmonic systems to achieve n...
Presentation
Full-text available
My presentation at the Liquid Crystals Conference (CLC2018) held in Jastrzębia Góra (Poland) from 17th to 21st September 2018
Article
Photo-anisotropic properties of a particular command layer for Liquid Crystals (LCs), based on azo-benzene material, are exploited to control the photo-thermal response of a single layer of homogeneously and uniformly distributed Au nanoparticles, immobilised on a glass substrate. Experiments demonstrate that the intrinsic anisotropy of materials c...
Article
The opto-mechanical control of the heat generated by an amorphous arrangement of homogenously distributed gold nanoparticles (AuNPs), excited by an external laser source, is investigated. Application of a macroscopic mechanical strain to the biocompatible elastomeric tape supporting the particles leads to a nanoscale modification of their mutual in...
Data
This is the supplementary information (ESI) for our paper recently published on Nanoscale reporting about Flexible thermo-plasmonics
Article
Plasmonic bowtie nanoantennas are intriguing nanostructures, capable to achieve very high local electromagnetic (EM) field confinement and enhancement in the hot spots. This effect is strongly dependent on the gap size, which in turn is related to technological limitations. Ultra-narrow gap bowtie nanoantennas, operating at visible frequencies, can...
Presentation
This presentation reports our result about a novel way to induce localized thermal response by exciting a system of plasmonic units supported by a flexible polymeric substrate (PDMS). A modification of local temperature is produced by applying a strain on the substrate. On this way, the plasmonic units modify their inter-distance and get coupled ge...
Article
Full-text available
Reliable chemical sensors with high selectivity and sensitivity toward specific target molecules require rational synthesis of receptors, in-depth characterization of their complexation abilities and highly efficient transduction of the molecular recognition event. Here we report a steady-state and time-resolved fluorescence investigation of EtQxBo...
Article
A nanoplatform for simultaneous cellular imaging, photodynamic and photothermal therapies has been designed and realized by embedding a purposely synthesized highly luminescent water soluble Iridium(III) compound into gold core - silica shell nanoparticles. These multifunctionalities arise mainly from the photophysical properties of the cyclometala...
Article
We report a detailed characterization of the photo-induced heating observed in gain-assisted solutions of gold nanoparticles (AuNPs). AuNPs, with sizes ranging from 14 to 48 nm and concentration of 2.5 10^(−10)M, are exposed to different intensity values of a resonant continuous laser (532 nm), used to excite their Localized Surface Plasmon Resonan...
Article
Controlling light propagation at the nanoscale is a fascinating opportunity offered by modern photonics, more than a challenge to face off. This study is aimed at investigating a particular kind of nanocomposite and reconfigurable optical metamaterials that can be exploited for the realization of a new class of switchable photonic devices, represen...
Article
The use of biomaterials as optical components has recently attracted attention because of their ease of functionalization and fabrication, along with their potential use when integrated with biological materials. We present here an observation of the optical properties of a silk-azobenzene material (Azosilk) and demonstrate the operation of an Azos...
Article
We present an experimental characterization and a comprehensive theoretical modeling of macroscopic plasmonic heat production that takes place in a single layer of small gold nanoparticles (GNPs), randomly distributed on a glass substrate, covered with different host media and acted on by a resonant radiation. We have performed a detailed experimen...
Article
Nematic liquid crystals (NLCs) have proved to be good surrounding materials to investigate variations of physical properties produced by plasmonic resonance in metallic nanoparticles (NPs). In this framework, availability of a simple and reliable tool enabling a complete analysis of dispersion in wavelength and temperature of the refractive index o...
Article
The photo-induced heating from a layer of uniformly distributed gold nanoparticles has been characterized to investigate the impact of a direct interaction of the metallic nanostructures with a drop of E7 nematic liquid crystal. A double effect is obtained: an increase of the photo-induced heating due to a change in the refractive index of the medi...
Article
Full-text available
Gold nanoparticles (GNPs) have proven to be good nano-sources of heat in the presence of specific electromagnetic radiation. This process, in fact, becomes strongly enhanced under plasmon resonance. In particular, the amount of generated heat and the consequent temperature increase depend on the number of GNPs that are collectively excited and on t...
Article
Full-text available
This work investigates the heat delivered by a mono-layer 1D grating of gold nanoparticles (GNPs) created by photo-reduction through two-photon direct laser writing (2P-DLW) in a poly-vinyl alcohol (PVA) matrix doped with HAuCl4, under resonant laser radiation. We drop cast a film of a PVA + HAuCl4 mixture onto a glass substrate, in which we create...
Article
We demonstrate and characterize an optical control of the plasmonic heat delivered by a monolayer substrate of gold nanoparticles, obtained by modulating the effective refractive index of the neighboring dielectric medium. The effect, which exploits the dependence of the nematic liquid crystal (NLC) refractive index on the molecular director orient...
Conference Paper
We report on photo-thermal effects observed in gold nanoparticles (GNPs) dispersed in Nematic Liquid Crystals (NLCs). Under a suitable optical radiation, GNPs exhibit a strong light absorption/scattering; the effect depends on the refractive index of the medium surrounding the nanoparticles, which can be electrically or optically tuned. In this way,...
Article
We report on the realization and characterization of electro-responsive and pressure sensitive polydimethylsiloxane (PDMS) conductive photonic structures combined with the reconfigurable properties of short pitch cholesteric liquid crystals (aligned in Grandjean configuration). By combining ion-implantation process and surface chemistry functionali...
Chapter
Liquid Crystals (LCs), combining optical nonlinearity and self-organizing properties with fluidity and being responsive to a wide variety of stimuli, have reached a key point in their development for photonic applications, for the realization of devices that can be dynamically reconfigurable, widely tunable and ultra-fast controlled. In this chapte...
Article
The last years have seen a growing interest in the ability of metallic nanoparticles (MNPs) to control temperature at the nanoscale. Under a suitable optical radiation, MNPs feature an enhanced light absorption/scattering, thus turning into an ideal nano-source of heat, remotely controllable by means of light. In this framework, we report our recen...
Article
Localized plasmon resonance (LPR) of noble Metal Nanoparticles (MNPs) opens up a new horizon for nanoscale materials able to convert light into heat, since the strong electric field generated around the MNPs can transform them into original heat nanosources. Thus, investigation of the heat transport mechanism, from the heated MNPs to their surround...
Article
Full-text available
The peculiar properties of Liquid Crystals (LCs) foster new possibilities in plasmonics. The combination of the intrinsic tunability of LCs with the plasmonic properties of metallic nanoparticles (NPs) provides novel and intriguing features of systems commonly identified as active plasmonics. Being LCs, one of the media whose refractive index can b...
Article
A liquid crystalline, negatively charged, whole-genome DNA is exploited to organize positively charged gold nanorods (GNRs) by means of electrostatic interaction. A mesoscopic alignment of the composite system along a preferred direction is obtained by casting a droplet of the DNA-nanorods solution onto an untreated glass substrate. Gel electrophor...
Article
Modern liquid crystal displays (LCD) require novel technologies, such as new alignment methods to eliminate alignment layers, fast response,long operation time . To this end, we report an overview of recent efforts in LCD technologies devoted to realize more display modes having no alignment layer, faster switching time and low battery consumption....
Article
Full-text available
We report an electro-responsive and pressure sensitive device based on conductive polydimethylsiloxane (PDMS) combined with a short pitch Cholesteric Liquid Crystal (CLC). Ion-implantation and surface chemistry in PDMS enable both the induction of conducting properties in this elastomer, as well as a long range organization of the CLC. Sample elect...

Questions

Questions (3)
Question
I want know the chemical structure of this cholesteric liquid crystal.
Question
I would know the typical range of physical pressure for a resistive touch screen expressed in bar or atm.
Question
I want implement an algorithm for the synchronization of the node sensors (MICAZ) in a WSN. It's so necessary change the value of the frequency, it's possibile do this in contiki OS?

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Projects

Projects (3)
Project
The present Special Issue focuses on the recent advances of multifunctional nanocrystals
Project
The active control of the localized plasmonic response at the nanoscale results in the modification of properties at the macroscale. Active Plasmonics comprises a wide scenario of possibilities depending on the utilized key stimulus which can range from electric or optical fields to temperature variations and applied mechanical strains. Application wise, Active Plasmonics result in smart photonics, biomedical sensors and physical security tags to name a few.
Project
Prediction and monitoring of the temperature variations at the nanoscale.