Search Results - "Leidens, M"

SU‐E‐I‐60: Use of Monte Carlo‐PENELOPE Method to Determine Radiation Dose to Organs and Tissues From Mammography by Leidens, M, Goes, E, Nicolluci, P

“…Purpose: The principal motivation to the radiographic examination of the breast is the early detection of breast cancer. However, the absorbed dose in other…”
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Nanoindentation unidirectional sliding and lateral force microscopy: Evaluation of experimental techniques to measure friction at the nanoscale by Echeverrigaray, F. G., Sales de Mello, S. R., Boeira, C. D., Leidens, L. M., Maia da Costa, M. E. H., Freire, F. L., Alvarez, F., Michels, A. F., Figueroa, C. A.

“…Lateral force microscopy (LFM) is an established technique to assess friction forces at the nanoscale. Nanoindentation followed by unidirectional sliding (NUS)…”
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Influence of base pressure prior to deposition on the adhesion behaviour of carbon thin films on steel by Boeira, Carla D., Leidens, Leonardo M., Michels, Alexandre F., Serra, Ricardo, Evaristo, Manuel, Fernandes, Filipe, Cavaleiro, Albano, Figueroa, Carlos A.

“…•Influence of deposition base pressure on carbon-based thin film adhesion.•Adhesion is enhanced in lower deposition base pressures.•The base pressure controls…”
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Illuminating Pathways to Dynamic Nanotribology: Light‐Mediated Active Control of Interfacial Friction with Nanosuspensions by Leidens, Leonardo M., Michels, Alexandre F., Machado, Giovanna, Alvarez, Fernando, Smirnov, Alex I., Krim, Jacqueline, Figueroa, Carlos A.

“…Active control of nanotribological properties is a challenge. Materials responsive to external stimuli may catalyze this paradigm shift. Recently, the…”
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A thermodynamic study on phase formation and thermal stability of AlSiTaTiZr high-entropy alloy thin films by Cemin, Felipe, Jimenez, Mawin J.M., Leidens, Leonardo M., Figueroa, Carlos A., Alvarez, Fernando

“…The vast, unexplored chemical realm of multi-principal element alloys (MPEAs) has encouraged researchers to design and synthetize advanced materials based on…”
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Phototribology: Control of Friction by Light by Perotti, Bruna L, Cammarata, Antonio, Cemin, Felipe, Sales de Mello, Saron R, Leidens, Leonardo M, Echeverrigaray, Fernando G, Minea, Tiberiu, Alvarez, Fernando, Michels, Alexandre F, Polcar, Tomas, Figueroa, Carlos A

“…In dry sliding, the coefficient of friction depends on the material pair and contact conditions. If the material and operating conditions remain unchanged, the…”
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Identification of the Chemical Bonding Prompting Adhesion of a-C:H Thin Films on Ferrous Alloy Intermediated by a SiCx:H Buffer Layer by Cemin, F, Bim, L T, Leidens, L M, Morales, M, Baumvol, I J R, Alvarez, F, Figueroa, C A

“…Amorphous carbon (a-C) and several related materials (DLCs) may have ultralow friction coefficients that can be used for saving-energy applications. However,…”
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Molecular dynamics simulations of the isotopic effect on nanoscale friction by Matté, D., Rech, G. L., Leidens, L. M., Zorzi, J. E., Michels, A. F., Figueroa, C. A., Perottoni, C. A.

“…Computer simulations are becoming increasingly useful for studying friction, enabling the application of controlled conditions and setups that are not usually…”
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Electrical contact resistance and tribological behaviors of self-lubricated dielectric coating under different conditions by Echeverrigaray, F.G., de Mello, S.R.S., Leidens, L.M., Boeira, C.D., Michels, A.F., Braceras, I., Figueroa, C.A.

“…In this study, the electro-tribological performance of hydrogenated amorphous carbon coatings against bearing steel in different experimental conditions was…”
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Substrate Bias Voltage Tailoring the Interfacial Chemistry of a‑SiC x :H: A Surprising Improvement in Adhesion of a‑C:H Thin Films Deposited on Ferrous Alloys Controlled by Oxygen by Crespi, Ângela E, Leidens, Leonardo M, Antunes, Vinicius, Perotti, Bruna L, Michels, Alexandre F, Alvarez, Fernando, Figueroa, Carlos A

“…Hydrogenated amorphous carbon thin films (a-C:H) have attracted much attention because of their surprising properties, including ultralow friction coefficients…”
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Adhesion of Amorphous Carbon Nanofilms on Ferrous Alloy Substrates Using a Nanoscale Silicon Interlayer: Implications for Solid-State Lubrication by Boeira, Carla D, Cemin, Felipe, Leidens, Leonardo M, Weber, Jennifer S, Michels, Alexandre F, Aguzzoli, Cesar, Serra, Ricardo, Evaristo, Manuel, Fernandes, Filipe, Alvarez, Fernando, Cavaleiro, Albano, Figueroa, Carlos A

“…The low adhesion of amorphous carbon (a-C) films on ferrous alloys has restricted massive industrial application since their development, restricting…”
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Identification of the Chemical Bonding Prompting Adhesion of a‑C:H Thin Films on Ferrous Alloy Intermediated by a SiC x :H Buffer Layer by Cemin, F, Bim, L. T, Leidens, L. M, Morales, M, Baumvol, I. J. R, Alvarez, F, Figueroa, C. A

“…Amorphous carbon (a-C) and several related materials (DLCs) may have ultralow friction coefficients that can be used for saving-energy applications. However,…”
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Hydrogen plasma etching mechanism at the a-C:H/a-SiCx:H interface: A key factor for a-C:H adhesion by Leidens, Leonardo M., Crespi, Ângela E., Boeira, Carla D., Echeverrigaray, Fernando G., Figueroa, Carlos A.

“…[Display omitted] •Hydrogen etching radically modifies the interlayer thickness and Si/C ratio.•Amorphous carbon coatings adhesion depends on Si/C ratio in the…”
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Nanotribology of Hydrogenated Amorphous Silicon: Sliding-Dependent Friction and Implications for Nanoelectromechanical Systems by Leidens, Leonardo M., Michels, Alexandre F., Perotti, Bruna L., Alvarez, Fernando, Zanatta, Antonio R., Figueroa, Carlos A.

“…Silicon-based materials are widely applied in micro- and nanoscale devices, such as micro- and nano-electromechanical systems (MEMs and NEMs, respectively)…”
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Influence of hydrogen etching on the adhesion of coated ferrous alloy by hydrogenated amorphous carbon deposited at low temperature by Crespi, A.E., Leidens, L.M., Aguzzoli, C., Alvarez, F., Figueroa, C.A.

“…Carbonaceous thin films show poor adhesion when deposited on steels. Chromium, titanium, and silicon-containing interlayers are generally used in order to…”
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A comprehensive study on different silicon-containing interlayers for a-C:H adhesion on ferrous alloys by Boeira, C.D., Leidens, L.M., Cemin, F., Petry, E.R., Maia da Costa, M.E.H., Camargo, S.S., Michels, A.F., Figueroa, C.A.

“…Silicon-containing interlayers can be used to promote adhesion of a-C:H thin films on ferrous alloys substrates. In contrast to chromium and titanium…”
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Visible Light-Driven Photocatalysis and Antibacterial Performance of a Cu-TiO 2 Nanocomposite by de Lima, Michele S., Schio, Aline L., Aguzzoli, Cesar, de Souza, Wellington V., Roesch-Ely, Mariana, Leidens, Leonardo M., Boeira, Carla D., Alvarez, Fernando, Elois, Mariana A., Fongaro, Gislaine, Figueroa, Carlos A., Michels, Alexandre F.

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Adhesion of hydrogenated amorphous carbon films on ferrous alloy by intermediate nitrogen plasma treatment in silicon-containing interlayers by Boeira, Carla D., Leidens, Leonardo M., Crespi, Ângela E., Maia da Costa, Marcelo E.H., Figueroa, Carlos A., Michels, Alexandre F.

“…Hydrogenated amorphous carbon (a-C:H) thin films show low adhesion on ferrous alloys. The addition of a silicon-containing interlayer could minimize the…”
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Different desorption rates prompting an indirect isotopic effect on nanoscale friction by Leidens, L.M., Matté, D., Rech, G.L., Zorzi, J.E., Michels, A.F., Alvarez, F., Perottoni, C.A., Figueroa, C.A.

“…•Hydrogen and deuterium-passivated surfaces present different desorption rates•Adsorbates’ desorption rates may be related to the isotopic effect on friction•A…”
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