Zobrazeno 1 - 10
of 296
pro vyhledávání: '"R. Birjega"'
Autor:
R. Alexandrescu, I. Morjan, F. Dumitrache, M. Scarisoreanu, I. Soare, C. Fleaca, R. Birjega, E. Popovici, L. Gavrila, G. Prodan, V. Ciupina, G. Filoti, V. Kuncser, L. Vekas
Publikováno v:
International Journal of Photoenergy, Vol 2008 (2008)
The laser pyrolysis is a powerful and a versatile tool for the gas-phase synthesis of nanoparticles. In this paper, some fundamental and applicative characteristics of this technique are outlined and recent results obtained in the preparation of gamm
Externí odkaz:
https://doaj.org/article/b4a2b6a9fa1941c5b5ab6fc5b87a0fae
Akademický článek
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Autor:
Greta Patrinoiu, Andrei Cucos, Oana Carp, Diana Pelinescu, Dana C. Culita, Coralia Bleotu, Cornel Munteanu, Raluca Dumitru, Jose M. Calderon-Moreno, Mariana Carmen Chifiriuc, R. Birjega
Publikováno v:
Journal of Colloid and Interface Science. 552:258-270
Single ZnO crystallites assembled into porous hierarchical structures have been prepared by topotactic thermal decomposition of in situ obtained zinc oxalate precursors, whose synthesis involves a redox reaction between 1,2-ethanediol and nitrate ion
Autor:
Florin Andrei, T. Tozar, Rodica Zăvoianu, I. Urzica, A. Vlad, M. Secu, R. Birjega, Maria Dinescu
Publikováno v:
Applied Surface Science. 478:754-761
Curcumin (CR) is a natural compound with a well-known antioxidant and therapeutic activity. Its stability may be enhanced when incorporated in different matrices as a layered double hydroxides (LDH) matrix. Curcumin intercalated layered double hydrox
Autor:
Mariana Carmen Chifiriuc, Diana Visinescu, Simona Somacescu, Miruna Silvia Stan, Mohammed Dyia Hussien, R. Birjega, Oana Carp, Marcela Popa, Jose Maria Calderon Moreno, Raluca Negrea, Cristian D. Ene
Publikováno v:
Langmuir. 34:13638-13651
Two ZnO materials of spherical hierarchical morphologies, with hollow (ZnOHS) and solid cores (ZnOSS), were obtained through the hydrolysis of zinc acetylacetonate in 1,4-butanediol. The nature of the defects and surface reactivity for the two ZnO ma
Autor:
Corneliu Ghica, Valentin S. Teodorescu, N.D. Scarisoreanu, Valentin Ion, A. Andrei, N. Dumitrescu, Antoniu Moldovan, Thomas Lippert, Fatima Haydous, R. Birjega, Maria Dinescu, Raluca Negrea
Publikováno v:
Scientific Reports, Vol 8, Iss 1, Pp 1-11 (2018)
Scientific Reports
Scientific Reports
We report significant photoelectrochemical activity of Y-doped BiFeO3 (Y-BFO) epitaxial thin films deposited on Nb:SrTiO3 substrates. The Y-BFO photoanodes exhibit a strong dependence of the photocurrent values on the thickness of the films, and impl
Autor:
F. Craciun, C.C. Negrila, E. Dimitriu, Bogdan Stefan Vasile, R. Birjega, R. Trusca, M. Cernea
Publikováno v:
Materials today (Amsterdam. Online) 18 (2020): 100350-1–100350-9. doi:10.1016/j.mtchem.2020.100350
info:cnr-pdr/source/autori:F. Craciun (1), E. Dimitriu (2), B.S. Vasile (3), C.C. Negrila (4), R. Trusca (3), R. Birjega (5), M. Cernea (4)/titolo:The enhancement mechanism of dielectric properties of Pb(Zr,Ti)O3 via (Mg2+,Sb3+) incorporation for supercapacitors/doi:10.1016%2Fj.mtchem.2020.100350/rivista:Materials today (Amsterdam. Online)/anno:2020/pagina_da:100350-1/pagina_a:100350-9/intervallo_pagine:100350-1–100350-9/volume:18
info:cnr-pdr/source/autori:F. Craciun (1), E. Dimitriu (2), B.S. Vasile (3), C.C. Negrila (4), R. Trusca (3), R. Birjega (5), M. Cernea (4)/titolo:The enhancement mechanism of dielectric properties of Pb(Zr,Ti)O3 via (Mg2+,Sb3+) incorporation for supercapacitors/doi:10.1016%2Fj.mtchem.2020.100350/rivista:Materials today (Amsterdam. Online)/anno:2020/pagina_da:100350-1/pagina_a:100350-9/intervallo_pagine:100350-1–100350-9/volume:18
Due to the extraordinary versatility of the perovskite structure in accommodating different dopant ions in its structure, in recent years a huge number of multifunctional perovskite materials have been developed. In this work we aim to obtain high te
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::38ec6d26098af25f98560bf39d80ac8c
https://publications.cnr.it/doc/433514
https://publications.cnr.it/doc/433514
Autor:
C. Mihailescu, V. Leca, R. Birjega, Maria Dinescu, I. Boerasu, Florin Andrei, Valentin Ion, Antoniu Moldovan, N. Scarisoreanu
Publikováno v:
Applied Physics A. 125
The physical properties of perovskite oxides are strongly influenced by their stoichiometry and one of the key features of these materials is the tunability of their functionality by controlling the interplay between the compositional and structural
Autor:
Vilas G. Pol, Valentin S. Teodorescu, Greta Patrinoiu, R. Birjega, Oana Carp, Jose M. Calderon-Moreno, Simona Somacescu, Vinodkumar Etacheri, Chulgi Nathan Hong, Dana C. Culita
Publikováno v:
Electrochimica Acta. 264:191-202
Herein we report a simple and scalable route to synthesize porous cobalt/cobalt oxide - carbon sphere composites as anode material for rechargeable lithium-ion batteries. It involves the impregnation of starch-derived hydrochar spheres with a cobalt
Autor:
Gheorghe Dinescu, Christian Grisolia, T. Acsente, Leona C. Nistor, Elena Matei, R. Birjega, Raluca Negrea
Publikováno v:
Materials Letters. 200:121-124
We report the synthesis of tungsten nanoparticles with two distinct shapes, concave hexapods and faceted cube-octahedral nanocrystals. These types of nanoparticles were obtained with a cluster source based on magnetron sputtering and gas aggregation,