Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Valentin Şerban Teodorescu"'
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
Autor:
Florin Andrei, Andreea Andrei, Ruxandra Birjega, Eduard Nicolae Sirjita, Alina Irina Radu, Maria Dinescu, Valentin Ion, Valentin-Adrian Maraloiu, Valentin Şerban Teodorescu, Nicu Doinel Scarisoreanu
Publikováno v:
Nanomaterials, Vol 11, Iss 1, p 110 (2021)
Due to its physical and chemical properties, the n-type tungsten oxide (WO3) semiconductor is a suitable photoanode for water decomposition reaction. The responses of the photoelectrochemical PEC water-splitting properties as an effect of structural
Externí odkaz:
https://doaj.org/article/98cbdaafefc947919944cf179b1f3065
Autor:
Mircea, Dragoman, Adrian, Dinescu, Daniela, Dragoman, Cătălin, Palade, Valentin Şerban, Teodorescu, Magdalena Lidia, Ciurea
Publikováno v:
Nanomaterials
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://explore.openaire.eu/search/publication?articleId=pmid________::b05d4566a36d3c7118ae79fe76e186ff
https://pubmed.ncbi.nlm.nih.gov/35055296
https://pubmed.ncbi.nlm.nih.gov/35055296
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:
Monica Scarisoreanu, Izabela Constantinoiu, Evghenii Goncearenco, Iuliana P. Morjan, Valentin Serban Teodorescu, Cristian Viespe
Publikováno v:
Chemosensors, Vol 12, Iss 8, p 160 (2024)
TiO2 nanoparticles (NPs) doped with W (W:TiO2), double-doped with W and V (W&V:TiO2), and loaded with noble metals (W:TiO2 @Pt/Pd/Ag and W&V:TiO2@Pt/Pd/Ag) were synthesized by laser pyrolysis followed by chemical impregnation and reduction. Due to it
Externí odkaz:
https://doaj.org/article/539cb2cdeefc4fb79634ddf348c5bb28
Autor:
Evghenii Goncearenco, Iuliana P. Morjan, Claudiu Teodor Fleaca, Florian Dumitrache, Elena Dutu, Monica Scarisoreanu, Valentin Serban Teodorescu, Alexandra Sandulescu, Crina Anastasescu, Ioan Balint
Publikováno v:
Beilstein Journal of Nanotechnology, Vol 14, Iss 1, Pp 616-630 (2023)
TiO2 nanoparticles were synthesized by laser pyrolysis from TiCl4 vapor in air in the presence of ethylene as sensitizer at different working pressures (250–850 mbar) with and without further calcination at 450 °C. The obtained powders were analyz
Externí odkaz:
https://doaj.org/article/3e0c518273f04d6a8d21524fa0c39542
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:
Madalina Nicolescu, Daiana Mitrea, Cristian Hornoiu, Silviu Preda, Hermine Stroescu, Mihai Anastasescu, Jose Maria Calderon-Moreno, Luminita Predoana, Valentin Serban Teodorescu, Valentin-Adrian Maraloiu, Maria Zaharescu, Mariuca Gartner
Publikováno v:
Gels, Vol 8, Iss 11, p 717 (2022)
The aim of the present study was the development of Nb-doped ITO thin films for carbon monoxide (CO) sensing applications. The detection of CO is imperious because of its high toxicity, with long-term exposure having a negative impact on human health
Externí odkaz:
https://doaj.org/article/737919e62b274e4a8a2a410bcf4c9a43
Autor:
Mariuca Gartner, Mihai Anastasescu, Jose Maria Calderon-Moreno, Madalina Nicolescu, Hermine Stroescu, Cristian Hornoiu, Silviu Preda, Luminita Predoana, Daiana Mitrea, Maria Covei, Valentin-Adrian Maraloiu, Valentin Serban Teodorescu, Carmen Moldovan, Peter Petrik, Maria Zaharescu
Publikováno v:
Nanomaterials, Vol 12, Iss 18, p 3244 (2022)
Undoped and Zn-doped ITO (ITO:Zn) multifunctional thin films were successfully synthesized using the sol–gel and dipping method on three different types of substrates (glass, SiO2/glass, and Si). The effect of Zn doping on the optoelectronic, micro
Externí odkaz:
https://doaj.org/article/961c09d2a15e4540aeb2027ad537668c