Publications

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Submitted
Santos, Lidia, Joana P. Neto, Ana Crespo, Daniela Nunes, Nuno Costa, Isabel M. Fonseca, Pedro Barquinha, Luis Pereira, Jorge Silva, Rodrigo Martins, and Elvira Fortunato. "{WO3 Nanoparticle-Based Conformable pH Sensor}." {ACS APPLIED MATERIALS & INTERFACES}. {6} (Submitted): {12226-12234}. Abstract

{pH is a vital physiological parameter that can be used for disease diagnosis and treatment as well as in monitoring other biological processes. Metal/metal oxide based pH sensors have several advantages regarding their reliability, miniaturization, and cost-effectiveness, which are critical characteristics for in vivo applications. In this work, WO3 nanoparticles were electrodeposited on flexible substrates over metal electrodes with a sensing area of 1 mm(2). These sensors show a sensitivity of -56.7 +/- 1.3 mV/pH, in a wide pH range of 9 to 5. A proof of concept is also demonstrated using a flexible reference electrode in solid electrolyte with a curved surface. A good balance between the performance parameters (sensitivity), the production costs, and simplicity of the sensors was accomplished, as required for wearable biomedical devices.}

2014
Pereira, Sónia, Alexandra Gonçalves, Nuno Correia, Joana Pinto, Lu\'ıs Pereira, Rodrigo Martins, and Elvira Fortunato. "{Electrochromic behavior of NiO thin films deposited by e-beam evaporation at room temperature}." Solar Energy Materials and Solar Cells. 120 (2014): 109-115. AbstractWebsite
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2013
a.M. Ramos, S. Pereira, M. T. Cidade, G. Pereira, R. Branquinho, L. Pereira, R. Martins, and E. Fortunato. "{Preparation and characterization of cellulose nanocomposite hydrogels as functional electrolytes}." Solid State Ionics. 242 (2013): 26-32. AbstractWebsite
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2012
Wojcik, Pawel Jerzy, Ana Sofia Cruz, L\'ıdia Santos, Lu\'ıs Pereira, Rodrigo Martins, and Elvira Fortunato. "{Microstructure control of dual-phase inkjet-printed a-WO3/TiO2/WOX films for high-performance electrochromic applications}." Journal of Materials Chemistry. 22 (2012): 13268. AbstractWebsite
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2011
Martins, Rodrigo, Arokia Nathan, Raquel Barros, Lu\'ıs Pereira, Pedro Barquinha, Nuno Correia, Ricardo Costa, Arman Ahnood, Isabel Ferreira, and Elvira Fortunato. "{Complementary metal oxide semiconductor technology with and on paper.}." Advanced materials (Deerfield Beach, Fla.). 23 (2011): 4491-6. AbstractWebsite
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Martins, R., B. Brás, I. Ferreira, L. Pereira, P. Barquinha, N. Correia, R. Costa, T. Busani, A. Gonçalves, A. Pimentel, and E. Fortunato. "{Away from silicon era: the paper electronics}." Eds. Ferechteh H. Teherani, David C. Look, and David J. Rogers. Vol. 7940. 2011. 79400P–10. Abstract
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2010
Martins, R., L. Pereira, P. Barquinha, N. Correia, G. Gonçalves, I. Ferreira, C. Dias, and E. Fortunato. "{Floating gate memory paper transistor}." Eds. Ferechteh H. Teherani, David C. Look, Cole W. Litton, and David J. Rogers. Vol. 7603. 2010. 760314–11. Abstract
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2009
Martins, R., L. Raniero, L. Pereira, D. Costa†, H. Águas, S. Pereira, L. Silva, A. Gonçalves, I. Ferreira, and E. Fortunato. "{Nanostructured silicon and its application to solar cells, position sensors and thin film transistors}." Philosophical Magazine. 89 (2009): 2699-2721. AbstractWebsite
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Bernardo, Gabriel, Gonçalo Gonçalves, Pedro Barquinha, Quirina Ferreira, Graça Brotas, Lu\'ıs Pereira, Ana Charas, Jorge Morgado, Rodrigo Martins, and Elvira Fortunato. "{Polymer light-emitting diodes with amorphous indium-zinc oxide anodes deposited at room temperature}." Synthetic Metals. 159 (2009): 1112-1115. AbstractWebsite
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Fortunato, E., Nuno Correia, Pedro Barquinha, Cláudia Costa, Lu\'ıs Pereira, Gonçalo Gonçalves, and Rodrigo Martins. "{Paper field effect transistor}." Eds. Ferechteh H. Teherani, Cole W. Litton, and David J. Rogers. Vol. 7217. 2009. 72170K–11. Abstract
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Martins, Rodrigo, P. Barquinha, L. Pereira, N. Correia, G. Gonçalves, I. Ferreira, and E. Fortunato. "{Selective floating gate non-volatile paper memory transistor}." physica status solidi (RRL) - Rapid Research Letters. 3 (2009): 308-310. AbstractWebsite
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2008
Fortunato, Elvira, Nuno Correia, Pedro Barquinha, LuÍs Pereira, Gon\c{C}alo Goncalves, and Rodrigo Martins. "{High-Performance Flexible Hybrid Field-Effect Transistors Based on Cellulose Fiber Paper}." IEEE Electron Device Letters. 29 (2008): 988-990. AbstractWebsite
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Martins, Rodrigo, Pedro Barquinha, Luís Pereira, Nuno Correia, Gonçalo Gonçalves, Isabel Ferreira, and Elvira Fortunato. "{Write-erase and read paper memory transistor}." Applied Physics Letters. 93 (2008): 203501. AbstractWebsite
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2007
2004
Zhang, S., L. Raniero, E. Fortunato, L. Pereira, N. Martins, P. Canhola, I. Ferreira, N. Nedev, H. Águas, and R. Martins. "{Characterization of silicon carbide thin films prepared by VHF-PECVD technology}." Journal of Non-Crystalline Solids. 338-340 (2004): 530-533. AbstractWebsite
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2002
Pereira, L., D. Brida, E. Fortunato, I. Ferreira, H. Águas, V. Silva, M. F. M. Costa, V. Teixeira, and R. Martins. "{a-Si:H interface optimisation for thin film position sensitive detectors produced on polymeric substrates}." Journal of Non-Crystalline Solids. 299-302 (2002): 1289-1294. AbstractWebsite
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Cabrita, A., J. Figueiredo, L. Pereira, V. Silva, D. Brida, E. Fortunato, and R. Martins. "{Performance of a-Six:C1−x:H Schottky barrier and pin diodes used as position sensitive detectors}." Journal of Non-Crystalline Solids. 299-302 (2002): 1277-1282. AbstractWebsite
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Ferreira, Isabel, Elvira Fortunato, Luı́s Pereira, M.Elisabete V. Costa, and Rodrigo Martins. "{The properties of a-Si:H films deposited on Mylar substrates by hot-wire plasma assisted technique}." Journal of Non-Crystalline Solids. 299-302 (2002): 30-35. AbstractWebsite
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2001
Ferreira, I., M. E. V. Costa, L. Pereira, E. Fortunato, R. Martins, A. R. Ramos, and M. F. Silva. "{Silicon carbide alloys produced by hot wire, hot wire plasma-assisted and plasma-enhanced CVD techniques}." Applied Surface Science. 184 (2001): 8-19. AbstractWebsite
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Cabrita, A., J. Figueiredo, L. Pereira, H. Águas, V. Silva, D. Brida, I. Ferreira, E. Fortunato, and R. Martins. "{Thin film position sensitive detectors based on pin amorphous silicon carbide structures}." Applied Surface Science. 184 (2001): 443-447. AbstractWebsite
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Cabrita, A., L. Pereira, D. Brida, A. Lopes, A. Marques, I. Ferreira, E. Fortunato, and R. Martins. "{Silicon carbide photodiodes: Schottky and PINIP structures}." Applied Surface Science. 184 (2001): 437-442. AbstractWebsite
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