Publications by authors named "Giulia D'Ambrogio"
Dielectrophoresis has recently been used for developing high performance elastomer-based structured piezoelectric composites. However, no study has yet focused on the development of aligned thermoplastic-based piezocomposites. In this work, highly anisotropic thermoplastic composites, with high piezoelectric sensitivity, are created.
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- - This study introduced a new method for assessing blood coagulation using blood-impedance-magnitude measurement, identifying two important biomarkers linked to fibrin formation and clot retraction during the process.
- - A combination of confocal microscopy and impedance analysis provided a detailed visual and quantitative understanding of coagulation events, confirming the relevance of the identified biomarkers.
- - The technique holds promising applications for monitoring coagulation on various materials, particularly in relation to artificial implants and cardiovascular prostheses, potentially enabling real-time material characterization.
Piezoelectric materials have been used for decades in the field of sensors as transducers and energy harvesters. Among these, piezoelectric composites are emerging being extremely advantageous in terms of production, costs, and versatility. However, the piezoelectric performances of a composite with randomly dispersed filler are not comparable with bulk ferroelectric ceramics and electroactive polymers.
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- The paper investigates how matrix materials and surfactants influence the properties of screen-printed BaTiO/PVDF composites, focusing on their rheology, morphology, and dielectric/piezoelectric features.
- Two types of matrices (PVDF-HFP and PVDF-TrFE) were tested with varying volume fractions of lead-free BaTiO microparticles and surfactants, where surfactants were found essential for stability during the printing process.
- Results showed PVDF-TrFE composites had better homogeneity and higher permittivity and piezoelectric coefficients, especially at elevated temperatures, suggesting their potential for applications over PVDF-HFP composites.
Article Synopsis
- - This paper presents a new type of polymer composite made from P(VDF-TrFE-CTFE) doped with 50% phosphor particles that efficiently converts light into electrical signals, potentially useful for retinal prostheses.
- - Experimental results show a significant increase in capacitance under blue and green light, with improvements of 78% and 25%, respectively, indicating high sensitivity and fast response.
- - The lightweight and ultra-flexible properties of the composite, along with its ability to reduce dielectric loss, make it a promising candidate for flexible light transducer applications in medical settings.