Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Ivan Velasco-Davalos"'
Autor:
Ivan Velasco-Davalos, Fabian Ambriz-Vargas, Gitanjali Kolhatkar, Reji Thomas, Andreas Ruediger
Publikováno v:
AIP Advances, Vol 6, Iss 6, Pp 065117-065117-11 (2016)
We report on a simple and fast procedure to create arrays of atomically flat terraces on single crystal SrTiO3 (111) substrates and the deposition of ferroelectric BiFeO3 thin films on such single-terminated surfaces. A microwave-assisted hydrotherma
Externí odkaz:
https://doaj.org/article/358c248e907c4771aa934e7826fa9b7e
Polarization reversal in BaTiO3 nanostructures synthesized by microwave-assisted hydrothermal method
Autor:
Reji Thomas, Andreas Ruediger, Ivan Velasco-Davalos, Carlos Gómez-Yáñez, Fabian Ambriz-Vargas
Publikováno v:
Journal of Alloys and Compounds. 667:268-274
Ferroelectric BaTiO3 nanostructures and thin films were deposited by a microwave assisted hydrothermal process at low temperatures (
Autor:
Bruno R. Matos, Leticia P. R. Moraes, Andreas Ruediger, Fabio C. Fonseca, Mauro André Dresch, Elisabete I. Santiago, Ana C. Tavares, Danilo Justino Carastan, J. Schoenmaker, Ivan Velasco-Davalos
Publikováno v:
Electrochimica Acta. 196:110-117
The relationship between electrical and morphological properties of annealed Nafion samples is investigated by X-ray diffraction (XRD), small angle X-ray scattering (SAXS), atomic force microscopy (AFM), and impedance spectroscopy. Experimental data
Publikováno v:
Surface and Coatings Technology. 283:108-114
We present a simple and fast microwave-assisted hydrothermal etching process for (110) oriented pure and Nb doped SrTiO 3 substrates. An annealing in oxygen atmosphere at 1000 °C after the etching in both deionized water and ammonia solution resulte
Autor:
Bruno R. Matos, Ivan Velasco-Davalos, Andreas Ruediger, Elisabete I. Santiago, Fabio C. Fonseca, Reginaldo Muccillo, Ana C. Tavares
Publikováno v:
Journal of Power Sources. 293:859-867
Nafion α-relaxation is the subject of intense investigations as it regulates the performance of electric actuators and polymer electrolyte fuel cells. Dielectric spectroscopy and atomic force microscopy measurements of Nafion membranes allow identif
Autor:
A. Mhamdi, M. Karyaoui, Mosbah Amlouk, Ivan Velasco-Davalos, Andreas Ruediger, A. Arfaoui, Chawki Awada, R. Dridi
Publikováno v:
Optical Materials. 47:386-390
In this paper, the authors have developed a method of preparing NiSnO 3 thin films precursors of NiO–SnO 2 complex oxide thin films with interests in photovoltaic and sensor applications. The films annealed at 450 °C were deposited on glass substr
Autor:
Yongqiang Wang, Young Sun, Dmitry Yarotski, Haizhong Guo, Haiyan Wang, Ivan Velasco-Davalos, Albina Y. Borisevich, Hou-Tong Chen, Shipeng Shen, Qian He, Hao Yang, Weiwei Li, Huizhong Zeng, Run Zhao, Yuheng Zhang, Sheng Ju, Jiahong Dai, Bin Chen, Wenrui Zhang, Kuijuan Jin, Li Pi, Le Wang, Zhijun Hu, Run-Wei Li, John Bowlan, Jun-xing Gu, Daning Shi, Langsheng Ling, Andreas Ruediger, Yangjiang Wu
Publikováno v:
Physical Review B. 96
Controlling functionalities, such as magnetism or ferroelectricity, by means of oxygen vacancies (${V}_{\mathrm{O}}$) is a key issue for the future development of transition-metal oxides. Progress in this field is currently addressed through ${V}_{\m
Autor:
Andreas Ruediger, Ivan Velasco-Davalos, Mathieu Moretti, Riad Nechache, Shun Li, Carlos Gómez-Yáñez, Mischa Nicklaus, C. Nauenheim
Publikováno v:
Applied Physics A. 115:1081-1085
Multiferroic bismuth ferrite (BiFeO3) has attracted considerable attention due to applications related to the bulk photovoltaic effect in which the direction of polarization determines the direction of the photocurrent. Epitaxial thin films are produ
Publikováno v:
Journal of Alloys and Compounds. 581:56-58
Niobium is a well-established donor dopant for semi-conducting BaTiO3 ceramics. The conventional procedure to dissolve Nb into BaTiO3 relies on thermal activation at high temperatures (up to 1500 °C) and even then, large dwell times are necessary du
Autor:
Andreas Ruediger, Elisabete I. Santiago, R. Muccillo, Ana C. Tavares, Fabio C. Fonseca, Bruno R. Matos, Ivan Velasco-Davalos
Publikováno v:
MRS Proceedings. 1735
Nafion α-relaxation has been the subject of intense investigations as it regulates the performance of electric actuators and polymer electrolyte fuel cells (PEMFC). Dielectric spectroscopy and atomic force microscopy (AFM) measurements of Nafion mem