ORCID Profile
0000-0001-8360-4974
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: American Chemical Society (ACS)
Date: 13-02-2013
DOI: 10.1021/LA304869Y
Abstract: An optofluidic method that accurately identifies the internal geometry of nanochannel arrays is presented. It is based on the dynamics of capillary-driven fluid imbibition, which is followed by laser interferometry. Conical nanochannel arrays in anodized alumina are investigated, which present an asymmetry of the filling times measured from different sides of the membrane. It is demonstrated by theory and experiments that the capillary filling asymmetry only depends on the ratio H of the inlet to outlet pore radii and that the ratio of filling times vary closely as H(7/3). Besides, the capillary filling of conical channels exhibits striking results in comparison to the corresponding cylindrical channels. Apart from these novel results in nanoscale fluid dynamics, the whole method discussed here serves as a characterization technique for nanoporous membranes.
Publisher: Elsevier BV
Date: 08-2010
Publisher: Informa UK Limited
Date: 07-04-2022
Publisher: Elsevier BV
Date: 05-2018
Publisher: Wiley
Date: 12-06-2009
Publisher: American Chemical Society (ACS)
Date: 18-01-2011
DOI: 10.1021/LA104502U
Abstract: An experimental study on the capillary filling of nanoporous silicon with different fluids is presented. Thin nanoporous membranes were obtained by electrochemical anodization, and the filling dynamics was measured by laser interferometry, taking advantage of the optical properties of the system, related with the small pore radius in comparison to light wavelength. This optical technique is relatively simple to implement and yields highly reproducible data. A fluid dynamic model for the filling process is also proposed including the main characteristics of the porous matrix (tortuosity, average hydraulic radius). The model was tested for different ambient pressures, porous layer morphology, and fluid properties. It was found that the model reproduces well the experimental data according to the different conditions. The predicted pore radii quantitatively agree with the image information from scanning electron microscopy. This technique can be readily used as nanofluidic sensor to determine fluid properties such as viscosity and surface tension of a small s le of liquid. Besides, the whole method can be suitable to characterize a porous matrix.
Publisher: Elsevier BV
Date: 11-2011
Publisher: Elsevier BV
Date: 08-2012
Publisher: AIP Publishing
Date: 10-2016
DOI: 10.1063/1.4965921
Abstract: Aerogels are light and porous solids whose properties, largely determined by their nanostructure, are useful in a wide range of applications, e.g., thermal insulation. In this work, as-deposited and thermally treated air-filled silica aerogel thin films synthesized using the sol-gel method were studied for their thermal properties using the 3-omega technique, at ambient conditions. The thermal conductivity and diffusivity were found to increase as the porosity of the aerogel decreased. Thermally treated films show a clear reduction in thermal conductivity compared with that of as-deposited films, likely due to an increase of porosity. The smallest thermal conductivity and diffusivity found for our aerogels were 0.019 W m−1 K−1 and 9.8 × 10-9 m2 s−1. A model was used to identify the components (solid, gaseous and radiative) of the total thermal conductivity of the aerogel.
Publisher: SPIE
Date: 19-11-2013
DOI: 10.1117/12.2030380
Publisher: Wiley
Date: 18-02-2011
DOI: 10.1002/JRS.2870
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4RA04184D
Abstract: Porous silicon (pSi) is a nanomaterial with salient properties for optical biosensor applications.
Publisher: Elsevier BV
Date: 04-2012
Publisher: Springer Science and Business Media LLC
Date: 25-07-2012
Publisher: Elsevier BV
Date: 07-2010
DOI: 10.1016/J.NEUROPSYCHOLOGIA.2010.05.007
Abstract: In iduals with Williams syndrome (WS) have been shown to have atypical morphology in the auditory cortex, an area associated with aspects of musicality. Some in iduals with WS have demonstrated specific musical abilities, despite intellectual delays. Primary auditory cortex and planum temporale volumes were manually segmented in 25 in iduals with WS and 25 control participants, and the participants also underwent testing of musical abilities. Left and right planum temporale volumes were significantly larger in the participants with WS than in controls, with no significant difference noted between groups in planum temporale asymmetry or primary auditory cortical volumes. Left planum temporale volume was significantly increased in a subgroup of the participants with WS who demonstrated specific musical strengths, as compared to the remaining WS participants, and was highly correlated with scores on a musical task. These findings suggest that differences in musical ability within WS may be in part associated with variability in the left auditory cortical region, providing further evidence of cognitive and neuroanatomical heterogeneity within this syndrome.
Publisher: IOP Publishing
Date: 05-2009
No related grants have been discovered for Leandro Acquaroli.