Zobrazeno 1 - 10
of 123
pro vyhledávání: '"Magdalena Lidia Ciurea"'
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:
Ovidiu Cojocaru, Ana-Maria Lepadatu, George Alexandru Nemnes, Toma Stoica, Magdalena Lidia Ciurea
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
Abstract We present a detailed study regarding the bandgap dependence on diameter and composition of spherical Ge-rich Ge x Si1−x nanocrystals (NCs). For this, we conducted a series of atomistic density functional theory (DFT) calculations on H-pas
Externí odkaz:
https://doaj.org/article/c3f5e3877bb3438fa7f5827470cbc551
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:
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:
Mircea Dragoman, Adrian Dinescu, Daniela Dragoman, Cătălin Palade, Valentin Şerban Teodorescu, Magdalena Lidia Ciurea
Publikováno v:
Nanomaterials, Vol 12, Iss 2, p 279 (2022)
We present an array of 225 field-effect transistors (FETs), where each of them has a graphene monolayer channel grown on a 3-layer deposited stack of 22 nm control HfO2/5 nm Ge-HfO2 intermediate layer/8 nm tunnel HfO2/p-Si substrate. The intermediate
Externí odkaz:
https://doaj.org/article/db383b9361f349009490df2522defb76
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:
Alin Iuga, Maria Dinescu, Toma Stoica, Ana-Maria Lepadatu, A. Slav, O. Cojocaru, Valentin Adrian Maraloiu, Magdalena Lidia Ciurea, Antoniu Moldovan, C. Palade, Valentin S. Teodorescu
Publikováno v:
Journal of Materials Chemistry C. 9:12353-12366
Orthorhombic HfO2 exhibits nanoscale ferroelectricity that opens the perspective of ultra-scalable CMOS integration of ferroelectric memories. However, many aspects of the metastable orthorhombic crystallization mechanisms still need to be elucidated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::17c3c9225c33bfff2aac0d7bbcbe334a
https://doi.org/10.1039/d1tc02921e
https://doi.org/10.1039/d1tc02921e
Autor:
Sorina Iftimie, H. Stroescu, Toma Stoica, Magdalena Lidia Ciurea, Mariuca Gartner, C. Palade, A. Slav, Mariana Braic, Valentin S. Teodorescu, Nicolae Catalin Zoita, Dan Buca, I. Dascalescu, Sorina Lazanu, Ana-Maria Lepadatu
Publikováno v:
ACS Applied Materials & Interfaces. 12:56161-56171
The development of short-wave infrared (SWIR) photonics based on GeSn alloys is of high technological interest for many application fields, such as the Internet of things or pollution monitoring. The manufacture of crystalline GeSn is a major challen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7570e55d6a45c04eb80d7ddd667a9f08
https://doi.org/10.1021/acsami.0c15887
https://doi.org/10.1021/acsami.0c15887
Autor:
Sorina Iftimie, Toma Stoica, Florin Comanescu, C. Palade, Ana-Maria Lepadatu, Valentin S. Teodorescu, Adrian Dinescu, A. Slav, O. Cojocaru, Valentin-Adrian Maraloiu, Magdalena Lidia Ciurea
Publikováno v:
The Journal of Physical Chemistry C. 124:25043-25053
Continuous development of Si photonics requires ecological and cost-effective materials. In this work, SiGe nanocrystals (NCs) embedded in TiO2 are investigated as a photosensitive material for vis...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f6bfb2f706a05fd40afa93f7de6c8367
https://doi.org/10.1021/acs.jpcc.0c06290
https://doi.org/10.1021/acs.jpcc.0c06290