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Browsing Articole din publicaţii internaţionale by Author "TIGINYANU, Ion"

Browsing Articole din publicaţii internaţionale by Author "TIGINYANU, Ion"

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  • Advanced Hybrid GaN/ZnO Nanoarchitectured Microtubes for Fluorescent Micromotors Driven by UV Light 
    WOLFF, Niklas; CIOBANU, Vladimir; ENACHI, Mihail; KAMP, Marius; BRANISTE, Tudor; DUPPEL, Viola; SHREE, Sindu; RAEVSCHI, Simion; MEDINA-SÁNCHEZ, Mariana; ADELUNG, Rainer; SCHMIDT, Oliver G.; KIENLE, Lorenz; TIGINYANU, Ion (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2020)
    The development of functional microstructures with designed hierarchical and complex morphologies and large free active surfaces offers new potential for improvement of the pristine microstructures properties by the ...
  • Aero-Ga2O3 Nanomaterial Electromagnetically Transparent from Microwaves to Terahertz for Internet of Things Applications 
    BRANISTE, Tudor; DRAGOMAN, Mircea; ZHUKOV, Sergey; ALDRIGO, Martino; CIOBANU, Vladimir; IORDANESCU, Sergiu; ALYABYEVA, Liudmila; FUMAGALLI, Francesco; CECCONE, Giacomo; RAEVSCHI, Simion; SCHÜTT, Fabian; ADELUNG, Rainer; COLPO, Pascal; GORSHUNOV, Boris; TIGINYANU, Ion (MDPI (Basel, Switzerland), 2020)
    In 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 ...
  • Aero-ZnS architectures with dual hydrophilic–hydrophobic properties for microfluidic applications 
    PLESCO, Irina; BRANISTE, Tudor; WOLFF, Niklas; GORCEAC, Leonid; DUPPEL, Viola; CINIC, Boris; MISHRA, Yogendra Kumar; SARUA, Andrei; ADELUNG, Rainer; KIENLE, Lorenz; TIGINYANU, Ion (AIP Publishing LLC, 2020)
    Here, we report on a new aero-material, called aero-ZnS, representing self-organized architectures made of ZnS hollow micro-tetrapod structures with nanoscale thin walls. The fabrication process is based on the hydride ...
  • Aero-ZnS prepared by physical vapor transport on three-dimensional networks of sacrificial ZnO microtetrapods 
    URSAKI, Veaceslav; BRANISTE, Tudor; ZALAMAI, Victor; RUSU, Emil; CIOBANU, Vladimir; MORARI, Vadim; PODGORNII, Daniel; RICCI, Pier Carlo; ADELUNG, Rainer; TIGINYANU, Ion (Beilstein Institut, 2024)
    Aeromaterials represent a class of increasingly attractive materials for various applications. Among them, aero-ZnS has been produced by hydride vapor phase epitaxy on sacrificial ZnO templates consisting of networks of ...
  • Atomically thin semiconducting layers and nanomembranes: a review 
    DRAGOMAN, Mircea; DRAGOMAN, Daniela; TIGINYANU, Ion (IOP Publishing, 2017)
    This article reviews the main physical properties of atomically thin semiconductors and the electronic devices based on them. We start with graphene, describing its physical properties and growth methods, followed by a ...
  • Cathodoluminescence of TiO2 nanotubes prepared by low-temperature anodization of Ti foils 
    ENACHI, Mihai; STEVENS-KALCEFF, Marion; TIGINYANU, Ion; URSAKI, Veaceslav (ELSEVIER, 2010)
    We show that anodization of Ti sheets in an ethylene glycol and HF containing electrolyte at temperatures under 0°C results in the formation of a self-arranged ordered porous structure at the top surface of the sample. ...
  • Characterization of p-NiO/n-Si heterojunctions prepared by spin coating method 
    MORARI, Vadim; ZALAMAI, Victor; RUSU, Emil; MONAICO, Eduard; URSAKI, Veacheslav; NIELSCH, Kornelius; TIGINYANU, Ion (Academia de Ştiinţe a Moldovei, 2019)
    In this paper, we present results on preparation of NiO thin films by spin-coating method. The films have been deposited on n-Si (100) substrates from 0.35 M aqueous solution of nickel chloride - NiCl2 *6H2 O or nickel ...
  • Copper doped zinc oxide micro- and nanostructures for room-temperature sensorial applications 
    LUPAN, Oleg; CRETU, Vasilii; SONTEA, Victor; RAILEAN, Serghei; GHIMPU, Lidia; TIGINYANU, Ion; RUDZEVICH, Yauheni; LIN, Yuqing; CHOW, Lee (IEEE, 2013)
    Detection of hydrogen gas is important for safety reasons. To obtain improved hydrogen sensing performances for miniaturized sensors, copper doping in zinc oxide micro- and nanostructures were investigated. Samples were ...
  • Crystallinity and optical properties of β-Ga2O3/Ga2S3 layered structure obtained by thermal annealing of Ga2S3 semiconductor 
    SPRINCEAN, Veaceslav; LUPAN, Oleg; CARAMAN, Iuliana; UNTILA, Dumitru; POSTICA, Vasile; COJOCARU, Ala; GAPEEVA, Anna; PALACHI, Leonid; ADELING, Rainer; TIGINYANU, Ion; CARAMAN, Mihail (ELSEVIER, 2021)
    In this work, the β-Ga2O3 nanostructures were obtained by thermal annealing in air of β-Ga2S3 single crystals at relatively high temperatures of 970 K, 1070 K and 1170 K for 6 h. The results show that the properties of ...
  • Design of titania nanotube structures by focused laser beam direct writing 
    ENACHI, Mihai; STEVENS-KALCEFF, Marion A.; SARUA, Andrei; URSAKI, Veaceslav; TIGINYANU, Ion (AIP Publishing LLC, 2013)
    In this work, we report on electrochemical fabrication of titania films consisting of nanotubes (NTs) and their treatment by focused laser beam. The results of sample characterization by optical and scanning electron ...
  • Design of titania nanotube structures by focused laser beam writing 
    ENACHI, Mihai; SARUA, Andrei; STEVENS-KALCEFF, Marion; TIGINYANU, Ion; GHIMPU, Lidia; URSAKI, Veaceslav (IEEE, 2013)
    Matrices of titania nanotubes (TiO 2 NTs) have been prepared by anodization of Ti foils in ethylene glycol based electrolyte. These matrices were subjected to annealing at various temperatures or exposed to a focused laser ...
  • Effect of Al Sn — Doping on properties of zinc oxide nanostructured films grown by magnetron sputtering 
    GHIMPU, Lidia; TIGINYANU, Ion; LUPAN, Oleg; MISHRA, Yogendra Kumar; PAULOWICZ, Ingo; GEDAMU, Dawit; COJOCARU, Ala; ADELUNG, Rainer (IEEE, 2013)
    Metal doping in nanostructured zinc oxide is important for device applications. To obtain improved performances for practical applications, Aluminum (Al) and Tin (Sn)-doping in zinc oxide nanostructured layers were ...
  • Electrochemistry-based maskless nanofabrication 
    TIGINYANU, Ion; MONAICO, Eduard; POPA, Veaceslav (IEEE, 2012)
    A review of technological approaches for 2D and 3D nanostructuring of semiconductor compounds by using radiation treatment and electrochemical etching is presented. We demonstrate novel spatial nanoarchitectures based on ...
  • Electromagnetic interference shielding in X-band with aero-GaN 
    DRAGOMAN, Mircea; BRANISTE, Tudor; IORDANESCU, Sergiu; ALDRIGO, Martino; RAEVSCHI, Simion; SHREE, Sindu; ADELUNG, Rainer; TIGINYANU, Ion (IOP Publishing, 2019)
    We investigate the electromagnetic shielding properties of an ultra-porous lightweight nanomaterial named aerogalnite (aero-GaN). Aero-GaN is made up of randomly arranged hollow GaN microtetrapods, which are obtained by ...
  • Enhanced ethanol vapour sensing performances of copper oxide nanocrystals with mixed phases 
    LUPAN, Oleg; CRETU, Vasilii; POSTICA, Vasile; ABABII, Nicolai; POLONSKYI, Oleksandr; KAIDAS, Victor; SCHÜTT, Fabian; MISHRA, Yogendra K.; MONAICO, Eduard; TIGINYANU, Ion; SONTEA, Victor; STRUNSKUS, Thomas; FAUPEL, Franz; ADELUNG, Rainer (ELSEVIER, 2016)
    The present study reports on nano-crystalline copper oxide thin films via a simple synthesis from chemical solutions (SCS) followed by two types of thermal annealing, namely rapid thermal annealing (RTA) and conventional ...
  • Fabrication of GaN nanowalls and nanowires using surface charge lithography 
    POPA, Veaceslav; TIGINYANU, Ion; VOLCIUC, Olesea; SARUA, Andrei; KUBALL, Martin; HEARD, Peter (ELSEVIER, 2008)
    We demonstrate the possibility for controlled nanostructuring of GaN by focused-ion-beam treatment with subsequent photoelectrochemical (PEC) etching. The proposed maskless approach based on direct writing of surface ...
  • Flexible photonic crystals based on ultrathin membranes 
    TIGINYANU, Ion (Editura Academiei Romane, 2015)
    A breakthrough is reported in the maskless fabrication of flexible photonic crystals based on ultrathin inorganic membranes. Taking into account the concept of Surface Charge Lithography proposed previously [1], a technological ...
  • Flexible pressure sensor based on graphene aerogel microstructures functionalized with CdS nanocrystalline thin film 
    PLESCO, Irina; DRAGOMAN, Mircea; STROBEL, Julian; GHIMPU, Lidia; SCHÜTT, Fabian; DINESCU, Adrian; URSAKI, Veaceslav; KIENLE, Lorenz; ADELUNG, Rainer; TIGINYANU, Ion (ELSEVIER, 2018)
    In this paper, we report on functionalization of graphene aerogel with a CdS thin film deposited by magnetron sputtering and on the development of flexible pressure sensors based on ultra-lightweight CdS-aerogel nanocomposite. ...
  • Formation of InP nanomembranes and nanowires under fast anodic etching of bulk substrates 
    MONAICO, Eduard; TIGINYANU, Ion; VOLCIUC, Olesea; MEHRTENS, Thorsten; ROSENAUER, Andreas; GUTOWSKI, Jürgen; NIELSCH, Kornelius (ELSEVIER, 2014)
    We demonstrate that fast anodic etching of bulk crystalline substrates of n-InP via photolithographically defined windows leads to the formation of nanomembranes and nanowires being promising for device applications. It ...
  • GaN nanomembranes as memristors with self-rectification 
    DRAGOMAN, Mircea; CIOBANU, Vladimir; DRAGOMAN, Daniela; DINESCU, Adrian; BRANISTE, Tudor; TIGINYANU, Ion (Institute of Nanocience and Nanotechnology, INN, 2017)
    We have recently shown that GaN ultrathin membranes suspended on GaN nanowires having a thickness of 15 nm and planar dimensions of 12×184 microns are acting as memristive devices. The physical effect which explains this ...

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