scispace - formally typeset
Search or ask a question
Author

Pietro Ferraro

Bio: Pietro Ferraro is an academic researcher from National Research Council. The author has contributed to research in topics: Digital holography & Holography. The author has an hindex of 61, co-authored 653 publications receiving 12666 citations. Previous affiliations of Pietro Ferraro include Aeritalia & Centre national de la recherche scientifique.


Papers
More filters
Journal ArticleDOI
TL;DR: The obtained light scattering profiles (LSPs) of individual living cells in microfluidic flows over a wide angular range and matched them with scattering simulations to characterize their morphological properties confirm the possibility of precise, label-free analysis ofindividual living erythrocytes in micro fluidic flowing.
Abstract: A camera-based light scattering approach coupled with a viscoelasticity-induced cell migration technique has been used to characterize the morphological properties of erythrocytes in microfluidic flows. We have obtained the light scattering profiles (LSPs) of individual living cells in microfluidic flows over a wide angular range and matched them with scattering simulations to characterize their morphological properties. The viscoelasticity-induced 3D cell alignment in microfluidic flows has been investigated by bright-field and holographic microscopy tracking, where the latter technique has been used to obtain precise cell alignment profiles in-flow. Such information allows variable cell probability control in microfluidic flows at very low viscoelastic polymer concentrations, obtaining cell measurements that are almost physiological. Our results confirm the possibility of precise, label-free analysis of individual living erythrocytes in microfluidic flows.

43 citations

Journal ArticleDOI
TL;DR: The use of a nozzle-free three-dimensional printing technique for the fabrication of printed structures that can be embedded in a variety of soft, transparent, flexible, and biocompatible polymers and thus easily integrated into lab-on-chip devices is proposed.
Abstract: In this study, we report a direct writing method for the fabrication of microfluidic footpaths by pyro-electrohydrodynamic (EHD) jet printing. Here, we propose the use of a nozzle-free three-dimensional printing technique for the fabrication of printed structures that can be embedded in a variety of soft, transparent, flexible, and biocompatible polymers and thus easily integrated into lab-on-chip devices. We prove the advantage of the high resolution and flexibility of pyro-EHD printing for the realization of microfluidic channels well below the standard limit in dimension of conventional ink-jet printing technique and simply adaptable to the end-user desires in terms of geometry and materials. Starting from the description of the innovative approach proposed for the channel fabrication, we demonstrate the design, fabrication, and proof of a microfluidic matrix of interconnected channels. The method described here could be a breakthrough technology for the fabrication of in situ implantable, stretchable,...

43 citations

Journal ArticleDOI
TL;DR: In this paper, the authors present the performance of a novel and compact holographic microscope that can ensure multifunctionality accomplishing, at the same time and by the same configuration, 3-D tracking, optical manipulation, and quantitative phase-contrast analysis.
Abstract: Recent advancements in the fields of interferometric microscopy and optical trapping are presented. In particular, the possibility to integrate these techniques in microfluidic and lab-on-chip devices is taken into account. We review the latest results concerning the realization of compact platforms to perform accurate measurements and particle trapping. In this framework, we present the performance of a novel and compact holographic microscope that can ensure multifunctionality accomplishing, at the same time and by the same configuration, 3-D tracking, optical manipulation, and quantitative phase-contrast analysis. Experimental results obtained on in vitro cells in microfluidic devices are presented. The system is based on twin laser beams coming from a single laser source. Through this simple and compact optical setup design, we show how multitasking can be accomplished by a single apparatus.

42 citations

Journal ArticleDOI
05 Mar 2010-Sensors
TL;DR: An overview on high-resolution and fast interrogation of optical-fiber sensors relying on laser reflection spectroscopy is given and results on detection performances are presented.
Abstract: An overview on high-resolution and fast interrogation of optical-fiber sensors relying on laser reflection spectroscopy is given Fiber Bragg-gratings (FBGs) and FBG resonators built in fibers of different types are used for strain, temperature and acceleration measurements using heterodyne-detection and optical frequency-locking techniques Silica fiber-ring cavities are used for chemical sensing based on evanescent-wave spectroscopy Various arrangements for signal recovery and noise reduction, as an extension of most typical spectroscopic techniques, are illustrated and results on detection performances are presented

41 citations

Journal ArticleDOI
TL;DR: In this article, a single-step self-assembling process aimed at forming two-dimensional array microstructures made from a nanocomposite polymer layer in which are dispersed CdSe-CdS nanocrystals was introduced.
Abstract: In this paper, we introduce a single-step self-assembling process aimed at forming two-dimensional (2-D) array microstructures made from a nanocomposite polymer layer in which are dispersed CdSe-CdS nanocrystals. The novelty of the process reported here is that it operates simultaneously as a two-fold process where the liquid polymer matrix is self-shaped by electrohydrodynamic pressure as a 2-D array of microstructures, while at the same time, the nanocrystals are self-assembled by dielectrophoretic forces. The proposed approach could inspire future smart fabrication techniques for producing self-assembled lensed nanocomposite layers. In principle, the method is scalable down to diameter lens up to few micrometers.

41 citations


Cited by
More filters
Journal Article
TL;DR: In this article, a fast Fourier transform method of topography and interferometry is proposed to discriminate between elevation and depression of the object or wave-front form, which has not been possible by the fringe-contour generation techniques.
Abstract: A fast-Fourier-transform method of topography and interferometry is proposed. By computer processing of a noncontour type of fringe pattern, automatic discrimination is achieved between elevation and depression of the object or wave-front form, which has not been possible by the fringe-contour-generation techniques. The method has advantages over moire topography and conventional fringe-contour interferometry in both accuracy and sensitivity. Unlike fringe-scanning techniques, the method is easy to apply because it uses no moving components.

3,742 citations

Journal ArticleDOI
TL;DR: In this paper, the authors review the recent developments in the area of optical fiber grating sensors, including quasi-distributed strain sensing using Bragg gratings, systems based on chirped gratings and intragrating sensing concepts.
Abstract: We review the recent developments in the area of optical fiber grating sensors, including quasi-distributed strain sensing using Bragg gratings, systems based on chirped gratings, intragrating sensing concepts, long period-based grating sensors, fiber grating laser-based systems, and interferometric sensor systems based on grating reflectors.

3,665 citations

01 Jan 2006

3,012 citations