113,441 research outputs found
Piezoresistive semi-transparent flexible sensors by bithiophene fulleropyrrolidine thin films
No full textPiezoresistive sensors are considered among the fundamental components of the future wearable electronic devices, given their potential applications in artificial skin, motion capture and personalized medicine.[1-5] Here, we present a cost-effective, viable fabrication approach to realize piezoresistive sensors using a novel polymeric biotiophene fulleropyrrolidine system (bis-C60Bi) synthesized on flexible ITO/PET supports by electrochemical chronoamperometry. By applying an anodic potential (1.5 V) to a solution containing the monomer, it is possible to obtain a homogeneous semi-transparent thin film on the ITO/PET surface (see Figure). AFM,
XPS, UV-vis have been employed to characterize the morphology and chemical composition of the new synthesized polymeric thin films, confirming the chemical structure and showing a nanoscale surface roughness of about 25 nm. The resulting polymer-based device shows good resistance variation on bending in the semi-static regime, outperforming current ITO/PET resistive sensors [6] and well matching commercial devices based on opaque amorphous carbon materials.[7] The durability of the sensor has been validated over almost one hundred cycles. This new class of polymeric piezoresistive sensors may open new applications in the field of kinematic acquisition or of sensor monitoring, with several potential applications as well as in medicine, robotics and physiotherapy.
Bibliography
1 M. Ricci, G. Di Lazzaro, A. Pisani, N. B. Mercuri, F. Giannini, G. Saggio, IEEE Journal of Biomedical and Health Informatics, 2019,
doi: 10.1109/JBHI.2019.2903627
2 G. Arrabito, V. Errico, Z. Zhang, W. Han, C. Falconi, Nano Energy, 2018, 46, 54. doi: 10.1016/j.nanoen.2018.01.029
3 G. Saggio, G. Orengo, A. Pallotti, V. Errico, M. Ricci, IEEE International Symposium on Medical Measurements and Applications
(MeMeA), 2018, doi: 10.1109/MeMeA.2018.8438767
4 N. Jasoon, M.D. Ho, W. Cheng, J. Mater. Chem. C, 2017, 5, 5845.
5 G. Saggio ; G. Orengo ; A. Pallotti ; V. Errico ; M. Ricci, International Symposium on Networks, Computers and Communications
(ISNCC) 2018 doi: 10.1109/ISNCC.2018.8531054
6 T. Lee, Y. W. Choi, G. Lee, P. V. Pikhita, D. Kang, S.M. Kim and M. Choi, J. Mater. Chem. C, 2016, 4, 9947.
7 G. Saggio, G. Orengo, Sensors and Actuators A, 2018, 273, 221
Injusticia epistémica en La mujer que cayó del cielo de Víctor Hugo Rascón Banda
No full textLa mujer que cayó del cielo (2010), written by Mexican playwright V. H. Rascón Banda (1948–2008), is based on the true story of a Rarámuri woman from Chihuahua (Mexico), Rita Patiño, who was confined in a psychiatric hospital in Kansas for 12 years until her
plight became known to a human rights organization. Since she was denied linguistic and legal assistance, the authorities never determined who she was and where she was from, nor did she have access to a real diagnostic process.
Drawing from the concept of epistemic injustice (Fricker, 2007), the article addresses how Rascón Banda depicts the multiple abuses Rita suffered qua subject of knowledge and her resulting dehumanization as a result of her being an indigenous immigrant woman and, once interned, a mental patient. Central to the play is the forced ineffabilityof Rita’s experience, which in turn brought about an extreme case of
hermeneutical or, rather, contributive epistemic injustice (Dotson, 2012), ending up in Rita’s hermeneutical death
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