RSS 1.0Artigos - Física - FC
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A Synaptic Electrochemical Memristor Based on the Cu2+/Zn2+Cation Exchange in Zn:CdS Thin Films
Congiu, Mirko
; ; Graeff, Carlos F. O. (ChemistrySelect, 2018) [Artigo]
Neuromorphic hardware systems that simulate functions of biological brain synapses have been widely investigated due to their possible application in brain-inspired computing. We hereby report on a novel electrochemical ... -
Microstructure and selected mechanical properties of aged Ti-15Zr-based alloys for biomedical applications
Correa, D. R.N.; Kuroda, P. A.B. ; Lourenço, M. L. ; ; ; ; ; Rocha, L. A. ; Grandini, C. R. (Materials Science and Engineering C, 2018) [Artigo]
In this study, Ti-15Zr-xMo (5, 10, 15, and 20 wt%) alloys were submitted to solution and aging treatments and their effects evaluated in terms of phase composition and selected mechanical properties (Vickers microhardness ... -
Fibroblast and pre-osteoblast cell adhesive behavior on titanium alloy coated with diamond film
De Melo Silva, William; Ribeiro, Camila Amorim ; Marques, Cleiton Silva ; Tabata, Américo Sheitiro ; Saeki, Margarida Juri ; ; De Oliveira, Deilson Elgui (Materials Research, 2017) [Trabalho apresentado em evento]
It is well known that titanium alloys have mechanical strengths comparable to steels, as well as high corrosion resistance. Also, they have the advantage of promoting osseointegration, when used in medical and dental ... -
Mechanical spectroscopy of Ti-15Zr-based alloys with Mo addition
; Rocha, Luís Augusto; Grandini, Carlos Roberto (Materials Research, 2017) [Trabalho apresentado em evento]
In this paper, the effect of substitutional Mo amounts in internal friction and interstitial diffusion mechanisms was analyzed in Ti-15Zr-based alloys. Mechanical spectroscopy was obtained from room temperature up to 730 ... -
Development of Ti-15Zr-Mo alloys for applying as implantable biomedical devices
; Kuroda, P. A.B.; Lourenço, M. L. ; Fernandes, C. J.C. ; ; Zambuzzi, W. F. ; Grandini, C. R. (Journal of Alloys and Compounds, 2018) [Artigo]
In this study, the effect of molybdenum content in Ti-15Zr-based alloys (wt%) was analyzed in terms of crystalline structure, microstructure, selected mechanical properties, and cytotoxicity. The samples were produced by ... -
Structural and optical properties of soluble melanin analogues with enhanced photoluminescence quantum efficiency
Paulin, João Vitor; ; ; ; Graeff, Carlos F.O. (Polymer International, 2018) [Artigo]
Melanin is a functional material of growing interest for bioelectronics. Several melanin analogues have been employed in order to fully explore its potential; in this work melanin was synthesized using dimethylsulfoxide ... -
Theoretical evaluation of chemical substitutions along the main chain of poly(3-hexylthienylene-vinylene) for solar cell applications
; ; ; Lavarda, Francisco Carlos (Polymer International, 2018) [Artigo]
In order to improve the efficiency of bulk-heterojunction organic solar cells, one can try to optimize the active layer through the use of new materials that provide improvements in the parameters that influence the final ... -
Zinc oxide surface functionalization and related effects on corrosion resistance of titanium implants
Trino, Luciana D.; Dias, Leonardo F.G. ; Albano, Luiz G.S. ; Bronze-Uhle, Erika S. ; Rangel, Elidiane C. ; Graeff, Carlos F.O. ; Lisboa-Filho, Paulo N. (Ceramics International, 2018) [Artigo]
Important clinical concerns in orthopedics and dental implantology are associated with a significant release of titanium (Ti) metal ions and debris due to the low corrosion resistance of this material. Chemical modifications ... -
Elastic modulus of PVDF with bentonite or LiNbO3 using deformation energy
Pintão, Carlos Alberto Fonzar; Cardoso, Celso Xavier (Polimeros, 2017) [Artigo]
Polyvinylidene fluoride (PVDF) is valued for its properties of transparency to light, lightness, flexibility, mechanical strength, chemical stability, ease of processing, and low-cost production. Ceramics have low mechanical ... -
Ketoprofen Loaded in Natural Rubber Latex Transdermal Patch for Tendinitis Treatment
Floriano, Juliana Ferreira; de Barros, Natan Roberto ; Cinman, José Luiz Ferreira ; da Silva, Rosangela Gonçalves ; Loffredo, Augusto Villela ; Borges, Felipe Azevedo ; ; ; Garms, Bruna Cambraia ; de Oliveira Graeff, Carlos Frederico et al. (Journal of Polymers and the Environment, 2018) [Artigo]
Ketoprofen is an analgesic with potent anti-inflammatory activity against acute inflammation, subacute inflammation, for the acute and long-term treatment of various inflammatory pathologies, as rheumatoid arthritis and ... -
Low temperature heat treatments on Ti-15Zr-xMo alloys
Xavier, Caio Castanho; Correa, Diego Rafael Nespeque ; Grandini, Carlos Roberto ; Rocha, Luís Augusto (Journal of Alloys and Compounds, 2017) [Artigo]
This paper regards the study of the effect of heat treatments on the microstructure and microhardness of Ti-15Zr-xMo alloys aimed to biomedical applications. The alloys were melted in an arc-furnace, with four different ... -
Low voltage and high frequency vertical organic field effect transistor based on rod-coating silver nanowires grid electrode
Albano, Luiz G.S.; Boratto, Miguel H. ; Nunes-Neto, Oswaldo ; Graeff, Carlos F.O. (Organic Electronics: physics, materials, applications, 2017) [Artigo]
We report on low voltage and high frequency vertical organic field-effect transistors (VOFETs) using silver nanowires (AgNWs) as intermediate grid electrode (source) deposited through Mayer rod-coating. The optimized AgNWs ... -
Excited state absorption spectra of dissolved and aggregated distyrylbenzene: A TD-DFT state and vibronic analysis
Oliveira, Eliezer Fernando; ; Lavarda, Francisco Carlos ; ; ; (Journal of Chemical Physics, 2017) [Artigo]
A time-dependent density functional theory study is performed to reveal the excited state absorption (ESA) features of distyrylbenzene (DSB), a prototype π-conjugated organic oligomer. Starting with a didactic insight to ... -
New Class of Organic Hole-Transporting Materials Based on Xanthene Derivatives for Organic Electronic Applications
; Bartolomeu, Aloisio A.; Dos Santos, Willian Henrique ; Da Silva Filho, Luiz Carlos ; De Oliveira, Eliezer Fernando ; Lavarda, Francisco Carlos ; ; ; ; et al. (Journal of Physical Chemistry C, 2017) [Artigo]
In this work, we investigate the influence of three novel 14-aril-14H-dibenzo[a,j]xanthene derivatives (XDs) modified with different functional groups as very promising hole-transporting materials for organic optoelectronic ... -
Strongly Red-Shifted Photoluminescence Band Induced by Molecular Twisting in Cyanine (Cy3) Dye Films
; ; ; Vismara, Marcus Vinícius Gonçalves; Graeff, Carlos F. O. ; ; ; ; ; (Journal of Physical Chemistry C, 2017) [Artigo]
Cyanine dye molecules, used as monomers or in aggregate form, find interesting applications in optoelectronic devices. Among the various aggregate species incorporating organic dyes, centrosymmetric dimers are known as ... -
Torsion modulus using the technique of mechanical spectroscopy in biomaterials
Pintão, Carlos Alberto Fonzar; Correa, Diego R. N. ; Grandini, Carlos R. (Journal of Mechanical Science and Technology, 2017) [Artigo]
This work presents a new alternative to studying and determining the shear or torsion modulus, G. For this purpose, a measuring system was constructed with a rotational motion sensor coupled to a torsion pendulum that ... -
Limits on the use of cobalt sulfide as anode of p-type dye-sensitized solar cells Dedicated to Professor Roberto Federici on the occasion of his retirement.
; Congiu, Mirko; ; ; ; Graeff, Carlos F O ; (Journal of Physics D: Applied Physics, 2017) [Artigo]
Thin films of cobalt sulfide (CoS) of thickness l < 10m have been employed as anodes of p-type dye-sensitized solar cells (p-DSCs) when P1-sensitized nickel oxide (NiO) was the photoactive cathode and /I - constituted the ... -
Design of diblock co-oligomers as low bandgap small molecules for organic solar cells
Oliveira, Eliezer Fernando; Lavarda, Francisco Carlos (Molecular Simulation, 2017) [Artigo]
The properties of a particular kind of small molecule that is built from two oligomers of different monomers, i.e. a diblock co-oligomer, as the electron donor in the active layer of organic solar cells are investigated ... -
Memristive behavior of the SnO2/TiO2 interface deposited by sol–gel
Boratto, Miguel H.; Ramos, Roberto A. ; Congiu, Mirko ; Graeff, Carlos F.O. ; Scalvi, Luis V.A. (Applied Surface Science, 2017) [Artigo]
A novel and cheap Resistive Random Access Memory (RRAM) device is proposed within this work, based on the interface between antimony doped Tin Oxide (4%at Sb:SnO2) and Titanium Oxide (TiO2) thin films, entirely prepared ... -
One-Step Synthesis of Methoxylated Phloroglucinol Derivatives Promoted by Niobium Pentachloride: An Experimental and Theoretical Approach
Dos Santos, Willian Henrique; De Oliveira, Eliezer Fernando ; Lavarda, Francisco Carlos ; ; ; Da Silva-Filho, Luiz Carlos (Synthesis (Germany), 2017) [Artigo]
Phloroglucinol derivatives are an important class of natural compounds featuring the rhodomyrtone derivatives. In this work, the synthesis of compounds with a structure core of rhodomyrtosone I is described using a ...