Degree: Doctor

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Affiliation(s):

Faculty of Science, University of Porto

Bio

José C. S. Costa completed his Ph.D. in Chemistry in 2015 at the University of Porto, Faculty of Science. Currently, he holds the position of Auxiliary Researcher (permanent contract) in the Department of Chemistry and Biochemistry at the Faculty of Science, University of Porto. Costa is an integrated member of the IMS-Institute of Molecular Sciences & CIQUP - "Centro de Investigação em Química da Universidade do Porto."  His primary areas of scientific activity include physical chemistry and materials chemistry. His current research interests encompass fundamental and functional studies on thin films fabricated through vapor deposition approaches, organic and inorganic semiconductors, optoelectronic devices, hybrid perovskites, and ionic liquids. 

Costa has been actively contributing to the advancement of knowledge in thin films and advanced materials at his institution.  Since the inception of his research activities, Costa has published 40 papers in international peer-reviewed journals (with an h-index of 14), 2 papers in national peer-reviewed journals, and served as the editor of 1 scientific book and 1 journal issue. Out of a total of 40 international publications, 30 were released as the first and/or corresponding author. Almost all publications belong to quartile Q1 of the journal citation ranking. Additionally, Costa holds 1 registered patent. He has actively participated in several national and international academic conferences, seminars, and scientific meetings. Costa is the author/co-author of >30 oral communications and >30 poster communications, two of which received the best poster award. He has contributed to 13 R&D projects, organized 8 scientific/academic events, and actively participated in approximately 50 others. Costa has supervised 2 Ph.D. dissertations, 5 MSc dissertations, 8 works of course completion of LSc/BSc, and 15 scientific projects for young researchers (extracurricular internships). He has received 10 awards and/or honors. 

Most of his work has been carried out in the areas of Exact Sciences with an emphasis on Chemical and Physical Sciences. In his professional activities, he has interacted with ~100 collaborators, co-authoring scientific papers with them. In his curriculum, the most frequently recurring terms related to his scientific, technological, and artistic-cultural contributions include Organic Semiconductors, Physical Vapor Deposition, Chemistry, Chemical Engineering, Chemistry and Biochemistry, Thin Films, Ionic Liquids, Perovskites, and Thermodynamics.


Areas of Interest

  1. Physical sciences > Chemistry > Physical chemistry
  2. Physical sciences > Chemistry > Physical chemistry > Surface chemistry
  3. Physical sciences > Physics > Condensed matter properties
  4. Technological sciences > Technology > Nanotechnology > Nanodevices
  5. Technological sciences > Technology > Nanotechnology > Nanosystems


CIQUP  |  Centro de Investigação em Química da Universidade do Porto
IMS |  Institute of Molecular Sciences

ORCID: https://orcid.org/0000-0002-7134-8675

CIENCIA ID: https://www.cienciavitae.pt//D712-8242-7BD2

Projects
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Publications
Showing 5 latest publications. Total publications: 35
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1. The effect of oxidation state and tert-butyl substituents on the thermal behavior and thin-film morphology of cobalt-complexes (FK 102 and FK 209), Costa, JCS Carvalho, RM; Silva, RMA; Lobo Ferreira, AIMC Santos, LMNBF in Journal of Chemical Thermodynamics, 2022, ISSN: 0021-9614,  Volume: 174, 
Article,  Indexed in: crossref, scopus, unpaywall  DOI: 10.1016/j.jct.2022.106856 P-00W-V1G
Abstract This work reports the thermodynamic and morphological study and characterization of four salts consisting of a divalent/trivalent cobalt complex with pyrazole-pyridine ligands (FK 102 and FK 209 samples) and bis(trifluoromethylsulfonyl)imide (TFSI) moieties as counter anions. The oxidation state of the central metal (Co(II) or Co(III)) and the presence of tert-butyl (t-Bu) groups in the ligand structure were found to have a strong impact on the thermal behavior, phase stability, heat capacities, and thin-film morphology of each salt. The Co(II) complexes exhibited good thermal stability up to 600 K. Lower thermal stability was observed for the Co(III) congeners. The FK 209 Co(III) displayed a higher melting temperature but a partial decomposition during or above melting was detected. The higher melting temperatures observed for the Co(III) complexes were found to be entropically driven. However, the addition of t-Bu in the ligand (FK 209) leads to an increase in the melting temperature, which is driven by the enthalpy of fusion. The four compounds studied evidenced a large glass-forming ability. Moreover, the thermal stability of the glassy state was clearly increased when the ligands comprised t-Bu groups. The contribution of the t-Bu group for the molar heat capacity in the solid phase, at T = 298.15 K, was found to be (110 ± 3) J·K−1·mol−1 and (98 ± 4) J·K−1·mol−1 for the Co(II) and Co(III) complexes, respectively. These results are in good agreement with the contribution of the t-Bu group observed for both solid and liquid phases in other materials, indicating that the t-Bu groups are relatively unhindered in the crystalline phase of the salts. The morphological behavior of the thin films of FK 102 samples was found to be quite similar to the observed for typical ionic liquids, with the formation of micro- and nanodroplets onto different substrates. The introduction of t-Bu substituents in the ligand structure was found to have a strong impact on the formation of homogeneous and compact nanofilms for the FK 209 salts. © 2022 Elsevier Ltd
2. Solid-Liquid-Gas Phase Equilibria for Small Phenylene-Thiophene Co-Oligomers, Lima, CFRAC Costa, JCS Silva, AMS; Mendes, A; Santos, LMNBF in JOURNAL OF CHEMICAL AND ENGINEERING DATA, 2022, ISSN: 0021-9568,  Volume: 67, 
Article,  Indexed in: crossref, scopus, wos  DOI: 10.1021/acs.jced.2c00459 P-00X-9X2
Abstract This work reports a comprehensive experimental evaluation of the solid-liquid-gas phase equilibria for five representative phenylene-thiophene co-oligomers (3-ring aromatic compounds having both phenyl and thienyl units). The melting temperatures and corresponding standard molar enthalpies and entropies of fusion were measured by differential scanning calorimetry. The equilibrium vapor pressures of the crystalline solids as a function of temperature were measured by a combined Knudsen/quartz-crystal effusion method, with the consequent derivation of the standard molar enthalpies, entropies, and Gibbs energies of sublimation. The thermodynamic properties of vaporization were estimated from the fusion and sublimation data. The results were analyzed together with the literature data for the corresponding phenylene and thiophene homo-oligomers. The thermodynamic properties of fusion and sublimation exhibited a dependence on ring identity and position that cannot be adequately described by a simple group additivity reasoning. The plot of the Gibbs energy of sublimation as a function of the number of thienyl rings in the co-oligomer showed the existence of two series. Terminal 3-thienyl rings and a linear molecular shape were found to be consistent factors contributing to the stabilization of the crystal phase. The higher melting temperatures and lower volatilities of crystalline 3-thienyl compounds were tentatively explained by the ability of these rings to maximize intermolecular C-H & BULL;& BULL;& BULL;pi interactions independently of the sulfur position. The optical energy gaps, as measured by UV-vis in solution, were found to lie within the values for typical organic semiconductors (< 4 eV) and to decrease for co-oligomers containing more 2-thienyl units, following the increased ring-ring planarity of the molecules. The surface morphology of vapor-deposited thin films suggests a stronger tendency of the co-oligomers, if compared to their corresponding homo-oligomers p-terphenyl and terthiophene, to form less amorphous films.
3. The impact of the cation alkyl chain length on the wettability of alkylimidazolium-based ionic liquids at the nanoscale, Costa, JCS Alves, A Bastos, M Santos, LMNBF in PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2022, ISSN: 1463-9076,  Volume: 24, 
Article,  Indexed in: crossref, scopus, wos  DOI: 10.1039/d2cp01868c P-00W-KJM
Abstract Ionic liquids (ILs) have been widely used for energy storage and conversion devices due to their negligible vapor pressure, high thermal stability, and outstanding interfacial properties. Notably, the interfacial nanostructure and the wettability of thin ionic liquid films on solid surfaces are of utmost relevance in nanosurface science and technology. Herein, a reproducible physical vapor deposition methodology was used to fabricate thin films of four alkylimidazolium bis(trifluoromethylsulfonyl)imide ILs. The effect of the cation alkyl chain length on the wettability of ILs was explored on different surfaces: gold (Au); silver (Ag); indium-tin oxide (ITO). High-resolution scanning electron microscopy (SEM) and atomic force microscopy (AFM) were used to evaluate the morphology of the produced micro- and nanodroplets and films. SEM and AFM results revealed an island growth for all the ILs deposited on ITO and Ag surfaces, with a lower minimum free area to promote nucleation (MFAN) in Ag and higher wettability for ILs having larger non-polar domains. The low wettability of ITO by the studied ILs was highlighted. For long-chain ILs, nucleation and growth mechanisms were strongly conditioned by coalescence processes. The results also supported the higher affinity of the ILs to the Au surface. The increase in the length of the cation alkyl chain was found to promote a better film adhesion inducing a 2D growth and higher wetting ability.
4. Nucleation, Coalescence, and Thin-Film Growth of Triflate-Based Ionic Liquids on ITO, Ag, and Au Surfaces, Teixeira, MSM; Santos, LMNBF Costa, JCS in COLLOIDS AND INTERFACES, 2022, ISSN: 2504-5377,  Volume: 6, 
Article,  Indexed in: crossref, scopus, wos  DOI: 10.3390/colloids6030046 P-00X-7WT
Abstract This study investigates the nucleation and growth of micro-/nanodroplets of triflate-based ionic liquids (ILs) fabricated by vapor deposition on different surfaces: indium tin oxide (ITO); silver (Ag); gold (Au). The ILs studied are constituted by the alkylimidazolium cation and the triflate anion-[CnC1 im][OTF] series. One of the key issues that determine the potential applications of ILs is the wettability of surfaces. Herein, the wetting behavior was evaluated by changing the cation alkyl chain length (C-2 to C-10). A reproducible control of the deposition rate was conducted employing Knudsen cells, and the thin-film morphology was evaluated by high-resolution scanning electron microscopy (SEM). The study reported here for the [C(n)C(1)im][OTF] series agrees with recent data for the [C(n)C(1)im][NTf2] congeners, highlighting the higher wettability of the solid substrates to long-chain alkylimidazolium cations. Compared to [NTf2], the [OTF] series evidenced an even more pronounced wetting ability on Au and coalescence processes of droplets highly intense on ITO. Higher homogeneity and film cohesion were found for cationic groups associated with larger alkyl side chains. An island growth was observed on both Ag and ITO substrates independently of the cation alkyl chain length. The Ag surface promoted the formation of smaller-size droplets. A quantitative analysis of the number of microdroplets formed on Ag and ITO revealed a trend shift around [C(6)C(1)im][OTF], emphasizing the effect of the nanostructuration intensification due to the formation of nonpolar continuous domains.
5. On the Aromatic Stabilization of Fused Polycyclic Aromatic Hydrocarbons, Costa, JCS Campos, RM; Lima, LMSS; da Silva, MAVR; Santos, LMNBF in JOURNAL OF PHYSICAL CHEMISTRY A, 2021, ISSN: 1089-5639,  Volume: 125, 
Article,  Indexed in: crossref, scopus, wos  DOI: 10.1021/acs.jpca.1c01978 P-00T-YND
Abstract The thermodynamic properties and band gap energies were evaluated for six ortho- and peri-fused polycyclic aromatic hydrocarbons (PAHs): triphenylene; benzo[a]pyrene; benzo[e]pyrene; perylene; benzo[ghi]perylene; coronene. The standard molar enthalpies of formation in the crystalline state and the standard molar enthalpies of sublimation were measured by high precision combustion calorimetry and Knudsen effusion methodology, respectively. The combination of the molar enthalpies of formation in the crystalline state with the respective enthalpies of sublimation was used to evaluate the energetics of the progressive peri-fusion of the aromatic moieties from triphenylene to coronene aiming to investigate the hypothetical superaromaticity character of coronene. The linear trend of the enthalpy of formation in crystalline and gaseous phases in the series (from benzo[e]pyrene to coronene) is an irrefutable indication of a non-superaromaticity character of coronene. High accurate thermodynamic properties of sublimation (volatility, enthalpy, and entropy of sublimation) were derived by the measurement of vapor pressures as a function of temperature, using a Knudsen/quartz crystal effusion methodology. Furthermore, the p-electronic conjugation of these compounds was explored by evaluation of the optical band gaps along with this series of compounds. The morphology of perylene, benzo[ghi]perylene, and coronene thin films, deposited by physical vapor deposition onto transparent conductive oxide substrates (ITO and FTO), was used to analyze the nucleation and growth mechanisms. The morphologies observed were found to be related to the cohesive energy and entropy of the bulk.