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Soares, PI, AM Alves, LC Pereira, JT Coutinho, IM Ferreira, CM Novo, and J. P. Borges. "Effects of surfactants on the magnetic properties of iron oxide colloids." J Colloid Interface Sci.. 419 (2014): 46-51. AbstractWebsite

Iron oxide nanoparticles are having been extensively investigated for several biomedical applications such as hyperthermia and magnetic resonance imaging. However, one of the biggest problems of these nanoparticles is their aggregation.

Taking this into account, in this study the influence of three different surfactants (oleic acid, sodium citrate and Triton X-100) each one with various concentrations in the colloidal solutions stability was analyzed by using a rapid and facile method, the variation in the optical absorbance along time.

The synthesized nanoparticles through chemical precipitation showed an average size of 9 nm and a narrow size distribution. X-ray diffraction pattern and Fourier Transform Infrared analysis confirmed the presence of pure magnetite. SQUID measurements showed superparamagnetic properties with a blocking temperature around 155 K. In addition it was observed that neither sodium citrate nor Triton X-100 influences the magnetic properties of the nanoparticles. On the other hand, oleic acid in a concentration of 64 mM decreases the saturation magnetization from 67 to 45 emu/g. Oleic acid exhibits a good performance as stabilizer of the iron oxide nanoparticles in an aqueous solution for 24 h, for concentrations that lead to the formation of the double layer.

AS, Pedrosa, Borges JPMR, Neagu E, Marat-Mendes JN, and Lança MCH Electrical characterization of biphasic ceramics used in hard tissue replacement., 2013. Abstract
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Almeida, PL; Kundu, S.; Borges, JP; Godinho, and MH; Figueirinhas. "Electro-optical light scattering shutter using electrospun cellulose-based nano- and microfibers." 95 (2009): –-. Abstract
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AFR, Pimenta, Baptista AC, Carvalho T, Brogueira P, Lourenco NMT, Afonso CAM, Barreiros S, Vidinha P, and Borges JP. "Electrospinning of Ion Jelly fibers." MATERIALS LETTERS. 83 (2012): 161-164. Abstract
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José Luís Ferreira, Susana Gomes, Célia Henriques João Paulo Borges Jorge Carvalho Silva. "Electrospinning polycaprolactone dissolved in glacial acetic acid: fiber production, non-woven characterization and in vitro evaluation." Journal of Applied Polymer Science. 131.22 (2014): 41068. Abstract

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Vieira, Tânia, Jorge Carvalho Silva, A. M. Botelho Do Rego, João P. Borges, and Célia Henriques. "Electrospun biodegradable chitosan based-poly (urethane urea) scaffolds for soft tissue engineering." 103 (2019): 109819. Abstract
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Matos, Ricardo JR, Catarina IP Chaparro, Jorge C. Silva, Manuel Almeida Valente, João Paulo Borges, and Paula I. P. Soares. "Electrospun composite cellulose acetate/iron oxide nanoparticles non-woven membranes for magnetic hyperthermia applications." (2018). Abstract
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AC, Baptista, Ferreira I, and Borges JP. "Electrospun Fibers in Composite Materials for Medical Applications." Journal of Composites and Biodegradable Polymers. 1.1 (2013): 56-65. Abstract

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PQ, Franco, Joao CFC, Silva JC, and Borges JP. "Electrospun hydroxyapatite fibers from a simple sol-gel system." MATERIALS LETTERS. 67 (2012): 233-236. Abstract
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Vieira, Tânia, Ana Margarida Rebelo, João Paulo Borges, Célia Henriques, and Jorge Carvalho Silva. "Electrospun Polycaprolactone Membranes Expanded with Chitosan Granules for Cell Infiltration." 16.4 (2024): 527. Abstract
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Vieira, Tania, Ana Margarida Rebelo, Joao Paulo Borges, Celia Henriques, and Jorge Carvalho Silva. "ELECTROSPUN SCAFFOLDS WITH EXPANDED PORES TO SUPPORT CELLULAR INFILTRATION FOR SKIN REGENERATION." Vol. 28. MARY ANN LIEBERT, INC 140 HUGUENOT STREET, 3RD FL, NEW ROCHELLE, NY 10801 USA, 2022. S563. Abstract
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Gonçalves, Adriana, Beatriz T. Simões, Filipe V. Almeida, Susete N. Fernandes, Manuel Valente, Tânia Vieira, Célia Henriques, João Paulo Borges, and Paula I. P. Soares. "Engineering dual-stimuli responsive poly (vinyl alcohol) nanofibrous membranes for cancer treatment by magnetic hyperthermia." 145 (2023): 213275. Abstract
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R, Igreja, Domingos H, Borges JP, and Dias CJ. "Enhancing the Response of Chemocapacitors with Electrospun Nanofiber Films." ADVANCED MATERIALS FORUM VI, PTS 1 AND 2. 730-732 (2013): 197-202. Abstract
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Hammami, Imen, Manuel Pedro Fernandes Graça, Sílvia Rodrigues Gavinho, Suresh Kumar Jakka, João Paulo Borges, Jorge Carvalho Silva, and Luís Cadillon Costa. "Exploring the Impact of Copper Oxide Substitution on Structure, Morphology, Bioactivity, and Electrical Properties of 45S5 Bioglass®." 9.4 (2024): 213. Abstract
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Hammami, Imen, Sílvia Rodrigues Gavinho, Ana Sofia Pádua, Maria Carmo do Lança, João Paulo Borges, Jorge Carvalho Silva, Isabel Sá-Nogueira, Suresh Kumar Jakka, and Manuel Pedro Fernandes Graça. "Extensive investigation on the effect of niobium insertion on the physical and biological properties of 45S5 bioactive glass for dental implant." 24.6 (2023): 5244. Abstract
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Simões, Beatriz T., Filipe V. Almeida, João Paulo Borges, and Paula I. P. Soares. "Extracellular Hyperthermia for the Treatment of Advanced Cutaneous Melanoma." 8.1 (2022): 56. Abstract
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Khili, Faouzia, Joao Borges, Pedro L. Almeida, Rabah Boukherroub, and Amel Dakhlaoui Omrani. "Extraction of cellulose nanocrystals with structure I and II and their applications for reduction of graphene oxide and nanocomposite elaboration." (2018): 1-15. Abstract
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Khili, Faouzia, Joao Borges, Pedro L. Almeida, Rabah Boukherroub, and Amel Dakhlaoui Omrani. "Extraction of cellulose nanocrystals with structure I and II and their applications for reduction of graphene oxide and nanocomposite elaboration." 10.7 (2019): 1913-1927. Abstract
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