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Montilla F, Clara E, Avilés T, Casimiro T, Aguiar Ricardo A, Nunes Da Ponte M. "Transition-metal-mediated activation of arylisocyanates in supercritical carbon dioxide." Journal of Organometallic Chemistry. 2001;626(1-2):227-232. AbstractWebsite
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Montilla F, Avilés T, Casimiro T, Ricardo AA, Nunes Da Ponte M. "CpCo(CO)2-catalysed cyclotrimerisation of alkynes in supercritical carbon dioxide." Journal of Organometallic Chemistry. 2001;632(1-2):113-118. AbstractWebsite
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Macedo H, Ricardo AA, Sotomayor J. "Construction of a low-cost apparatus for gas adsorption on solids." Journal of Chemical Education. 2006;83(6):915-918. AbstractWebsite
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Kordikowski A, Robertson DG, Poliakoff M, DiNoia TD, McHugh M, Aguiar-Ricardo A. "Acoustic determination of the critical surfaces in the ternary systems CO2 + CH2F2 + CF3CH2F and CO + C2H4 + CH3CHCH2 and in their binary subsystems." Journal of Physical Chemistry B. 1997;101(30):5853-5862. AbstractWebsite
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Kordikowski A, Robertson DG, Aguiar-Ricardo AI, Popov VK, Howdle SM, Poliakoff M. "Probing vapor/liquid equilibria of near-critical binary gas mixtures by acoustic measurements." Journal of Physical Chemistry. 1996;100(22):9522-9526. AbstractWebsite
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Ivanova GI, Vão ER, Temtem M, Aguiar-Ricardo A, Casimiro T, Cabrita EJ. "High-pressure NMR characterization of triacetyl-β-cyclodextrin in supercritical carbon dioxide." Magnetic Resonance in Chemistry. 2009;47(2):133-141. AbstractWebsite
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Giles MR, Griffiths RMT, Aguiar-Ricardo A, Silva MMCG, Howdle SM. "Fluorinated graft stabilizers for polymerization in supercritical carbon dioxide: the effect of stabilizer architecture." Macromolecules. 2001;34(1):20-25. AbstractWebsite
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Fernandes L, Rial-Otero R, Temtem M, Veiga de Macedo C, Aguiar-Ricardo A, Capelo JL. "Ultrasonic energy as a tool in the sample treatment for polymer characterization through matrix-assisted laser desorption ionization time-of-flight mass spectrometry." Talanta. 2008;77(2):882-888. AbstractWebsite
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Esperança JMSS, Pires PF, Guedes HJR, Ribeiro N, Costa T, Aguiar-Ricardo A. "Acoustic determination of thermophysical properties and critical parameters for the mixture (51 wt % R143a + 49 wt % R125) and critical line of xCO 2 + (1 - X)(51 wt % R143a + 49 wt % R125)." Journal of Chemical and Engineering Data. 2006;51(6):2161-2169. AbstractWebsite
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Duarte CMM, Menduiña C, Aguiar-Ricardo A, Nunes Da Ponte M. "Second and third virial coefficients of three binary mixtures containing xenon, at 273 K: Comparison between Xe + C2H6, Xe + C2H4 and Xe + CO2." Physical Chemistry Chemical Physics. 2002;4(19):4709-4715. AbstractWebsite
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Duarte C, Aguiar-Ricardo A, Ribeiro N, Casimiro T, Nunes Da Ponte M. "Correlation of vapor-liquid equilibrium for carbon dioxide + ethanol + water at temperatures from 35 to 70°C." Separation Science and Technology. 2000;35(14):2187-2201. AbstractWebsite
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Duarte CMM, Crew M, Casimiro T, Aguiar-Ricardo A, Nunes Da Ponte M. "Phase equilibrium for capsaicin + water + ethanol + supercritical carbon dioxide." Journal of Supercritical Fluids. 2002;22(2):87-92. AbstractWebsite
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Duarte ARC, Casimiro T, Aguiar-Ricardo A, Simplício AL, Duarte CMM. "Supercritical fluid polymerisation and impregnation of molecularly imprinted polymers for drug delivery." Journal of Supercritical Fluids. 2006;39(1):102-106. AbstractWebsite
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De MacEdo CV, Da Silva MS, Casimiro T, Cabrita EJ, Aguiar-Ricardo A. "Boron trifluoride catalyzed polymerisation of 2-substituted-2-oxazolines in supercritical carbon dioxide." Green Chemistry. 2007;9(9):948-953. AbstractWebsite
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Da Silva MS, Temtem M, Henriques S, Casimiro T, Aguiar-Ricardo A. "Phase behavior studies of 2-hydroxyethyl methacrylate and methyl methacrylate in high-pressure carbon dioxide." Journal of Chemical and Engineering Data. 2007;52(5):1970-1974. AbstractWebsite
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Da Silva MS, Nobrega FL, Aguiar-Ricardo A, Cabrita EJ, Casimiro T. "Development of molecularly imprinted co-polymeric devices for controlled delivery of flufenamic acid using supercritical fluid technology." Journal of Supercritical Fluids. 2011;58(1):150-157. AbstractWebsite
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Da Silva MS, Vão ER, Temtem M, Mafra L, CALDEIRA J, Aguiar-Ricardo A, Casimiro T. "Clean synthesis of molecular recognition polymeric materials with chiral sensing capability using supercritical fluid technology. Application as HPLC stationary phases." Biosensors and Bioelectronics. 2010;25(7):1742-1747. AbstractWebsite
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Da Silva MS, Viveiros R, Morgado PI, Aguiar-Ricardo A, Correia IJ, Casimiro T. "Development of 2-(dimethylamino)ethyl methacrylate-based molecular recognition devices for controlled drug delivery using supercritical fluid technology." International Journal of Pharmaceutics. 2011;416(1):61-68. AbstractWebsite
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Costa E, Coelho M, Ilharco LM, Aguiar-Ricardo A, Hammond PT. "Tannic acid mediated suppression of PNIPAAm microgels thermoresponsive behavior." Macromolecules. 2011;44(3):612-621. AbstractWebsite
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Costa E, Lloyd MM, Chopko C, Aguiar-Ricardo A, Hammond PT. "Tuning Smart Microgel Swelling and Responsive Behavior through Strong and Weak Polyelectrolyte Pair Assembly." LangmuirLangmuir. 2012;28(26):10082-10090. AbstractWebsite

The layer-by-layer (LbL) assembly of polyelectrolyte pairs on temperature and pH-sensitive cross-linked poly(N-isopropylacrylamide)-co-(methacrylic acid), poly(NIPAAm-co-MAA), microgels enabled a fine-tuning of the gel swelling and responsive behavior according to the mobility of the assembled polyelectrolyte (PE) pair and the composition of the outermost layer. Microbeads with well-defined morphology were initially prepared by synthesis in supercritical carbon dioxide. Upon LbL assembly of polyelectrolytes, interactions between the multilayers and the soft porous microgel led to differences in swelling and thermoresponsive behavior. For the weak PE pairs, namely poly(l-lysine)/poly(l-glutamic acid) and poly(allylamine hydrochloride)/poly(acrylic acid), polycation-terminated microgels were less swollen and more thermoresponsive than native microgel, whereas polyanion-terminated microgels were more swollen and not significantly responsive to temperature, in a quasi-reversible process with consecutive PE assembly. For the strong PE pair, poly(diallyldimethylammonium chloride)/poly(sodium styrene sulfonate), the differences among polycation and polyanion-terminated microgels are not sustained after the first PE bilayer due to extensive ionic cross-linking between the polyelectrolytes. The tendencies across the explored systems became less noteworthy in solutions with larger ionic strength due to overall charge shielding of the polyelectrolytes and microgel. ATR FT-IR studies correlated the swelling and responsive behavior after LbL assembly on the microgels with the extent of H-bonding and alternating charge distribution within the gel. Thus, the proposed LbL strategy may be a simple and flexible way to engineer smart microgels in terms of size, surface chemistry, overall charge and permeability.The layer-by-layer (LbL) assembly of polyelectrolyte pairs on temperature and pH-sensitive cross-linked poly(N-isopropylacrylamide)-co-(methacrylic acid), poly(NIPAAm-co-MAA), microgels enabled a fine-tuning of the gel swelling and responsive behavior according to the mobility of the assembled polyelectrolyte (PE) pair and the composition of the outermost layer. Microbeads with well-defined morphology were initially prepared by synthesis in supercritical carbon dioxide. Upon LbL assembly of polyelectrolytes, interactions between the multilayers and the soft porous microgel led to differences in swelling and thermoresponsive behavior. For the weak PE pairs, namely poly(l-lysine)/poly(l-glutamic acid) and poly(allylamine hydrochloride)/poly(acrylic acid), polycation-terminated microgels were less swollen and more thermoresponsive than native microgel, whereas polyanion-terminated microgels were more swollen and not significantly responsive to temperature, in a quasi-reversible process with consecutive PE assembly. For the strong PE pair, poly(diallyldimethylammonium chloride)/poly(sodium styrene sulfonate), the differences among polycation and polyanion-terminated microgels are not sustained after the first PE bilayer due to extensive ionic cross-linking between the polyelectrolytes. The tendencies across the explored systems became less noteworthy in solutions with larger ionic strength due to overall charge shielding of the polyelectrolytes and microgel. ATR FT-IR studies correlated the swelling and responsive behavior after LbL assembly on the microgels with the extent of H-bonding and alternating charge distribution within the gel. Thus, the proposed LbL strategy may be a simple and flexible way to engineer smart microgels in terms of size, surface chemistry, overall charge and permeability.

Costa E, De-Carvalho J, Casimiro T, da Silva CL, Cidade MT, Aguiar-Ricardo A. "Tailoring thermoresponsive microbeads in supercritical carbon dioxide for biomedical applications." Journal of Supercritical Fluids. 2011;56(3):292-298. AbstractWebsite
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Correia VG, Bonifácio VD, Raje VP, Casimiro T, Moutinho G, da Silva CL, Pinho MG, Aguiar-Ricardo A. "Oxazoline-Based Antimicrobial Oligomers: Synthesis by CROP Using Supercritical CO 2." Macromolecular Bioscience. 2011;11(8):1128-1137. AbstractWebsite
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Correia VG, Coelho M, Barroso T, Raje VP, Bonifácio VDB, Casimiro T, Pinho MG, Aguiar-Ricardo A. "Anti-biofouling 3D porous systems: the blend effect of oxazoline-based oligomers on chitosan scaffolds." Biofouling. 2013;29(3):273-282. AbstractWebsite
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Casimiro T, Banet-Osuna AM, Ramos AM, da Ponte MN, Aguiar-Ricardo A. "Synthesis of highly cross-linked poly(diethylene glycol dimethacrylate) microparticles in supercritical carbon dioxide." European Polymer Journal. 2005;41(9):1947-1953. AbstractWebsite
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Casimiro T, Montilla F, Garcia S, Avilés T, Raeissi S, Shariati A, Peters CJ, Nunes Da Ponte M, Aguiar-Ricardo A. "Phase behaviour of the catalyst dicarbonyl(η5- cyclopentadienyl)-cobalt in carbon dioxide." Journal of Supercritical Fluids. 2004;31(1):1-8. AbstractWebsite
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