Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Ionel Stavarache"'
Autor:
Muhammad Taha Sultan, Ionel Stavarache, Andrei Manolescu, Unnar Bjarni Arnalds, Valentin Serban Teodorescu, Halldor Gudfinnur Svavarsson, Snorri Ingvarsson, Magdalena Lidia Ciurea
Publikováno v:
Advanced Photonics Research, Vol 5, Iss 8, Pp n/a-n/a (2024)
SiGe‐SiO2‐based structures present high interest for their high photosensitivity from visible to short‐wavelength infrared. Herein, two postdeposition annealing procedures, that is, rapid thermal annealing (RTA) and rapid‐like furnace anneali
Externí odkaz:
https://doaj.org/article/3681201d6fd14a6ca593676e58d7b461
Autor:
Ioana Dascalescu, Catalin Palade, Adrian Slav, Ionel Stavarache, Ovidiu Cojocaru, Valentin Serban Teodorescu, Valentin-Adrian Maraloiu, Ana-Maria Lepadatu, Magdalena Lidia Ciurea, Toma Stoica
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-11 (2024)
Abstract SiGeSn nanocrystals (NCs) in oxides are of considerable interest for photo-effect applications due to the fine-tuning of the optical bandgap by quantum confinement in NCs. We present a detailed study regarding the silicon germanium tin (SiGe
Externí odkaz:
https://doaj.org/article/b5b9061060d04fdda2babc0411e23920
Autor:
Ionel Stavarache, Constantin Logofatu, Muhammad Taha Sultan, Andrei Manolescu, Halldor Gudfinnur Svavarsson, Valentin Serban Teodorescu, Magdalena Lidia Ciurea
Publikováno v:
Scientific Reports, Vol 10, Iss 1, Pp 1-9 (2020)
Abstract Films of SiGe nanocrystals (NCs) in oxide have the advantage of tuning the energy band gap by adjusting SiGe NCs composition and size. In this study, SiGe-SiO2 amorphous films were deposited by magnetron sputtering on Si substrate followed b
Externí odkaz:
https://doaj.org/article/3b540bd9eee14b009a9c0fc2d972e0fc
Autor:
Marcela Socol, Nicoleta Preda, Carmen Breazu, Gabriela Petre, Anca Stanculescu, Ionel Stavarache, Gianina Popescu-Pelin, Andrei Stochioiu, Gabriel Socol, Sorina Iftimie, Christine Thanner, Oana Rasoga
Publikováno v:
Materials, Vol 16, Iss 1, p 144 (2022)
Lately, there is a growing interest in organic photovoltaic (OPV) cells due to the organic materials’ properties and compatibility with various types of substrates. However, their efficiencies are low relative to the silicon ones; therefore, other
Externí odkaz:
https://doaj.org/article/e931ec180ae54adc907e5c5681a0d7f1
Autor:
Muhammad Taha Sultan, Adrian Valentin Maraloiu, Ionel Stavarache, Jón Tómas Gudmundsson, Andrei Manolescu, Valentin Serban Teodorescu, Magdalena Lidia Ciurea, Halldór Gudfinnur Svavarsson
Publikováno v:
Beilstein Journal of Nanotechnology, Vol 10, Iss 1, Pp 1873-1882 (2019)
Multilayer structures comprising of SiO2/SiGe/SiO2 and containing SiGe nanoparticles were obtained by depositing SiO2 layers using reactive direct current magnetron sputtering (dcMS), whereas, Si and Ge were co-sputtered using dcMS and high-power imp
Externí odkaz:
https://doaj.org/article/d9a0b6aa2bca4a21a847958eb79064f5
Autor:
Petronela Prepelita, Ionel Stavarache, Doina Craciun, Florin Garoi, Catalin Negrila, Beatrice Gabriela Sbarcea, Valentin Craciun
Publikováno v:
Beilstein Journal of Nanotechnology, Vol 10, Iss 1, Pp 1511-1522 (2019)
In this work, rapid thermal annealing (RTA) was applied to indium tin oxide (ITO) films in ambient atmosphere, resulting in significant improvements of the quality of the ITO films that are commonly used as conductive transparent electrodes for photo
Externí odkaz:
https://doaj.org/article/b4e7cf8f46ba4b019eed57671e910fc6
Autor:
Andreea Costas, Camelia Florica, Elena Matei, Maria Eugenia Toimil-Molares, Ionel Stavarache, Andrei Kuncser, Victor Kuncser, Ionut Enculescu
Publikováno v:
Beilstein Journal of Nanotechnology, Vol 9, Iss 1, Pp 2345-2355 (2018)
Arrays of magnetic Ni–Cu alloy nanowires with different compositions were prepared by a template-replication technique using electrochemical deposition into polycarbonate nanoporous membranes. Photolithography was employed for obtaining interdigita
Externí odkaz:
https://doaj.org/article/1c55cccb6412402d8228af0ddc3c68b6
Publikováno v:
Beilstein Journal of Nanotechnology, Vol 7, Iss 1, Pp 1492-1500 (2016)
Obtaining high-quality materials, based on nanocrystals, at low temperatures is one of the current challenges for opening new paths in improving and developing functional devices in nanoscale electronics and optoelectronics. Here we report a detailed
Externí odkaz:
https://doaj.org/article/4b49166af94d4957b883c1948ffd0da5
Publikováno v:
Sensors, Vol 20, Iss 21, p 6395 (2020)
One of the key elements in assessing traffic safety on the roads is the detection of asphalt conditions. In this paper, we propose an optical sensor based on GeSi nanocrystals embedded in SiO2 matrix that discriminates between different slippery road
Externí odkaz:
https://doaj.org/article/22fac136ed3f4edf9a60939ff76c1ff4
Autor:
Valentin S. Teodorescu, Cornel Ghica, Adrian V. Maraloiu, Mihai Vlaicu, Andrei Kuncser, Magdalena L. Ciurea, Ionel Stavarache, Ana M. Lepadatu, Nicu D. Scarisoreanu, Andreea Andrei, Valentin Ion, Maria Dinescu
Publikováno v:
Beilstein Journal of Nanotechnology, Vol 6, Iss 1, Pp 893-900 (2015)
Laser pulse processing of surfaces and thin films is a useful tool for amorphous thin films crystallization, surface nanostructuring, phase transformation and modification of physical properties of thin films. Here we show the effects of nanostructur
Externí odkaz:
https://doaj.org/article/16b1af0448b346148378804f5d565fdd