Browsing by Subject "nanotubes"

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  • Photocatalytic properties of TiO2 nanotubes doped with Ag, Au and Pt or covered by Ag, Au and Pt nanodots 
    ENACHI, Mihail; GUIX, Maria; BRANISTE, Tudor; POSTOLACHE, Vitalie; CIOBANU, Vladimir; URSAKI, Veaceslav; SCHMIDT, Oliver G.; TIGINYANU, Ion (Springer Nature Switzerland, 2015)
    Titania nanotube arrays have been prepared by anodic oxidation of titanium foils in an electrolyte solution containing a mixture of hydrofluoric acid, ethylene glycol, and phosphoric acid. The initially amorphous nanotubes ...
  • Prediction of negative index material lenses based on metallo-dielectric nanotubes 
    SERGENTU, V. V.; TIGINYANU, I. M.; URSAKI, V. V.; ENACHI, M.; ALBU, S. P.; SCHMUKI, P. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2008)
    We propose to assemble negative index materials (NIMs) from dielectric nanotubes with inner and outer surfaces covered by thin metallic films. The focusing properties of flat and concave lenses assembled from metallized ...
  • Preparation and photoelectric characterization of SWCNTs-P3OT nanocomposites 
    VERLAN, Victor; BORDIAN, Olga; CULEAC, Ion; IOVU, Mihail; BOERASU, Iulian; ENACHESCU, Marius (Institutul de Fizică Aplicată, 2015)
    This work presents experimental results on single-walled carbon nanotubes (SWCNTs) and nanocomposite materials based on SWCNTs and conducting polymer with conjugated bonds poly-3 oxythiofene (P3OT).
  • Procedeu de obţinere a nanostructurilor magnetice 
    MONAICO, Eduard; URSACHI, Veaceslav; MORARI, Vadim; TIGHINEANU Ion (Agenţia de Stat pentru Proprietatea Intelectuală, 2023-09-30)
    Invenţia se referă la tehnologia de producere a materialelor nanostructurate, în special la procedee de obţinere a nanostructurilor magnetice, care pot fi folosite în microelectronică, spintronică sau păstrarea informației. ...
  • Procedeu de obţinere a nanotuburilor metalice 
    SÎRBU, Lilian; URSACHI, Veaceslav; TIGHINEANU, Ion; BURLACU, Alexandru; ENACHI, Mihail (Agenția de Stat pentru Proprietatea Intelectuală a Republicii Moldova, 2006-06-30)
    Invenţia se referă la tehnica cu semiconductori, în particular la procedeele de obţinere a nanostructurilor. Procedeul de obţinere a nanotuburilor metalice constă în depunerea electrochimică a metalelor în porii semiconductorului ...
  • Processing-Induced Modification of Photo- and Cathodoluminescence Spectra of TiO2 Nanotubes 
    ENACHI, M.; STEVENS-KALCEFF, M.; BURLACU, A.; TIGINYANU, I.; URSAKI, V. (The Electrochemical Society, 2012)
    Cathodoluminescence and photoluminecsence are investigated in titanium dioxide nanotubes (TiO2 NTs) produced in an ethylene glycol based electrolyte with the variation of the temperature of the electrolyte which allows the ...
  • Pulsed Electrochemical Deposition of Pt and Bi2Te3 in Porous Inp: a Comparative Study 
    MONAICO, Ed.; MONAICO, El.; TIGINYANU, I. (Technical University of Moldova, 2015)
    Porous InP templates with parallel pores possessing diameters of 80 nm have been fabricated by anodic etching of commercially available n-InP substrates with (100) orientation in neutral electrolyte (NaCl). Comparative ...
  • Self-organized nucleation layer for the formation of ordered arrays of double-walled TiO2 nanotubes with temperature controlled inner diameter 
    ENACHI, Mihai; TIGINYANU, Ion; SPRINCEAN, Veaceslav; URSAKI, Veaceslav (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2010)
    Abstract It is proposed to use the variation of the electrolyte temperature to fabricate titania nanotubes with variable inner diameter at a constant outer diameter and an invariable package density. The anodization of Ti ...
  • Structuri hibride metal-semiconductor în baza nanoșabloanelor de InP și GaAs pentru aplicaţii electronice şi fotonice 
    MONAICO, Elena (Universitatea Tehnică a Moldovei, 2023)
    Scopul lucrării: studiul comparativ al procesului de corodare electrochimică a substraturilor semiconductoare de InP și GaAs pentru identificarea particularităților de propagare a porilor, optimizarea procesului de anodizare ...
  • Surface Plasmon Enhanced Luminescence from Au covered Titania Nanotubes burned in a Methane Flame 
    ENACHI, Mihail (Technical University of Moldova, 2011)
    It is shown that coating by Au layers with thickness of 5 – 10 nm of titania nanotubes with anatase structure produced by burning the as-electrochemically-prepared nanotubes in a methane flame leads to the increase of the ...
  • Template Assisted Formation of Metal Nanotubes 
    TIGINYANU, Ion; URSAKI, Veaceslav; MONAICO, Eduard (Springer International Publishing Switzerland, 2016)
    This chapter provides a review of methods for the production of metal nanotubes and their applications. The importance of nanotemplated growth of nanowires and nanotubes for nanofabrication, and the advantages of nanotubes ...
  • TiO2 nanotubes doped by AG, AU and PT or covered BY AG, AU AND PT nanodotes and their application as nanomotors 
    ENACHI, Mihail; POSTOLACHE, Vitalie; URSAKI, Veaceslav; TIGINYANU, Ion (Tehnica UTM, 2014)
    An anodic oxidation of titanium foils in an electrolyte containing a mixture of hydrofluoric acid, ethylene glycol, and phosphoric acid was used to obtain titania nanotube arrays. The initially amorphous nanotubes were ...
  • TiO2 nanotubes for chemical sensing 
    GALSTYAN, Vardan; POLI, Nicola; COMINI, Elisabetta (Technical University of Moldova, 2021)
    The importance of high performance gas sensing devices is rapidly increasing for a wide range of applications, including detection of toxic and explosive compounds in public spaces, military facilities, and chemical ...
  • TiO2 nanotubes for photocatalytic degradation of methylene blue 
    CIOBANU, Vladimir; PLESCO, Irina (Technical University of Moldova, 2021)
    Titanium dioxide remains one of the most studied semiconductor for photocatalytic applications due to its low cost production, reduced toxicity, ability to break down the organic pollutants and possibility to achieve ...
  • ZnSe-based conductive nanotemplates for nanofabrication 
    MONAICO, Eduard; TIGHINEANU, Petru; LANGA, Sergiu; HARTNAGEL, Hans L.; TIGINYANU, Ion (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2009)
    We show that anodic etching of n-type ZnSe crystalline substrates leads to the formation of pores which, after nucleation at surface defects, prove to follow the current lines, exhibiting multiplication until the front of ...

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