Facultatea de Fizică şi Inginerie / Faculty of Physics and Engineering
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Item Aero-Ga2o3 nanomaterial electromagnetically transparent from microwaves to terahertz for internet of things applications [Articol](2020) Braniște, Tudor; Dragoman, Mircea; Jucov, Serghei; Aldrigo, Martino; Ciobanu, Vladimir; Iordănescu, Sergiu; Alîabîeva, Liudmila; Fumagalli, Francesco; Ceccone, Giacomo; Raevschi, Simion; Schűtt, Fabian; Adelung, Rainer; Colpo, Pascal; Gorșunov, Boris; Tighineanu, IonIn this paper, fabrication of a new material is reported, the so-called Aero-Ga2O3 or Aerogallox, which represents an ultra-porous and ultra-lightweight three-dimensional architecture made from interconnected microtubes of gallium oxide with nanometer thin walls. The material is fabricated using epitaxial growth of an ultrathin layer of gallium nitride on zinc oxide microtetrapods fabricated using epitaxial growth of an ultrathin layer of gallium nitride on zinc oxide microtetrapods followed by decomposition of sacrificial ZnO and oxidation of GaN which according to the results of X-ray diffraction (XRD) and X-ray photoemission spectroscopy (XPS) characterizations, is transformed gradually in β-Ga2O3 with almost stoichiometric composition. The investigations show that the developed ultra-porous Aerogallox exhibits extremely low reflectivity and high transmissivity in an ultrabroadband electromagnetic spectrum ranging from X-band (8–12 GHz) to several terahertz which opens possibilities for quite new applications of gallium oxide, previously not anticipated.Item Aero-ZnS architectures with dual hydrophilic-hydrophobic properties for microfluidic applications [Articol](2020) Pleșco, Irina; Braniște, Tudor; Wolff, Niklas; Gorceac, Leonid; Duppel, Viola; Cinic, Boris; Mishra, Yogendra Kumar; Sarua, Andrei; Adelung, Rainer; Kienle, Lorenz; Tighineanu, IonHere, we report on a new aero-material, called aero-ZnS, representing self-organized architectures made of ZnS hollow micro-tetrapod struc- tures with nanoscale thin walls. The fabrication process is based on the hydride vapor phase epitaxy of CdS on sacrificial micro-tetrapods of ZnO with simultaneous or subsequent transformation of CdS into ZnS and removal of the sacrificial ZnO crystals. The nanostructure of the obtained ZnS hollow micro-tetrapods exhibits the polytypic intergrowth of wurtzite- and sphalerite-type phases perpendicular to their close packed planes. The inner surface of the micro-tetrapod walls preserves oxygen sites, as demonstrated by imaging based on electron energy- loss filtering. The self-organized aero-ZnS architecture proves to be hydrophilic under tension and hydrophobic when compressed against water. Self-propelled liquid marbles assembled using ZnS hollow micro-tetrapod structures are demonstrated.Item Особенности получения слоев материалов, диссоциирующих при нагревании [Articol](CEP USM, 2020) Никорич, ВалентинаItem Fotodetector pe heterojoncțiune din fosfură de indiu [Articol](CEP USM, 2020) Gorceac, Leonid; Botnariuc, Vasile; Coval, Andrei; Vatavu, Sergiu; Cinic, Boris; Raevschi, Simion; Rotaru, CorneliuItem Influența iodului asupra parametrilor fotovoltaici ai celulelor solare pe baza ftalocianinei de zinc realizate din soluții chimice [Articol](CEP USM, 2020) Gadiac, Ivan; Lungu, Ion; Furtună, Vadim; Potlog TamaraItem Fabricarea structurilor SnO2/CdTe/ZnO şi cercetarea proprietăţilor acestora [Articol](CEP USM, 2020) Lungu, Ion; Colibaba, Gleb; Potlog, TamaraItem Излучательные свойства порошков ZnO:Ag, полученных химическим осаждением из водного раствора [Articol](CEP USM, 2020) Гоглидзе, Татьяна; Гончаренко, Евгений; Дементьев, Игорь; Недеогло, Наталья; Юрьева, Татьяна; Недеогло, ДмитрийItem Ассоциативные центры люминесценции в кристаллах ZnSe, совместно легированных элементами V и VII групп [Articol](CEP USM, 2020) Сушкевич, Константин; Симинел, Никита; Недеогло, Наталья; Симинел, Анатолий; Недеогло, ДмитрийItem The intermediate CdO layer influence on solar energy conversion in CdS/CdTe heterojunctions [Articol](CEP USM, 2020) Qassem, Amjad-Al; Gagara, Ludmila; Fedorov, Vladimir; Potlog, TamaraItem Procese de generare-recombinare a purtătorilor de sarcină de neechilibru în compozitul Ga2O3/Ga2Se3 și în structurile microlamelare - Ga2O3/GaSe [Articol](CEP USM, 2020) Sprincean, Veaceslav; Dmitroglo, Liliana; Vatavu-Cuculescu, Elmira; Caraman, Mihail