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Browsing Articole ştiinţifice by Author "SARUA, Andrei"

Browsing Articole ştiinţifice by Author "SARUA, Andrei"

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  • 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 ...
  • 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 ...
  • 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 ...
  • Highly Porous and Ultra-Lightweight Aero-Ga2O3: Enhancement of Photocatalytic Activity by Noble Metals 
    PLESCO, Irina; CIOBANU, Vladimir; BRANISTE, Tudor; URSAKI, Veaceslav; RASCH, Florian; SARUA, Andrei; RAEVSCHI, Simion; ADELUNG, Rainer; DUTTA, Joydeep; TIGINYANU, Ion (MDPI, 2021)
    A new type of photocatalyst is proposed on the basis of aero-β-Ga2O3, which is a material constructed from a network of interconnected tetrapods with arms in the form of microtubes with nanometric walls. The aero-Ga2O3 ...
  • Integration of individual TiO2 nanotube on the chip: Nanodevice for hydrogen sensing 
    ENACHI, Mihail; LUPAN, Oleg; BRANISTE, Tudor; SARUA, Andrei; CHOW, Lee; MISHRA, Yogendra K.; GEDAMU, Dawit; ADELUNG, Rainer; TIGINYANU, Ion (WILEY-VCH Verlag GmbH \&Co. KGaA, Weinheim, 2015)
    Titania (TiO2) exists in several phases possessing different physical properties. In view of this fact, we report on three types of hydrogen sensors based on individual TiO2 nanotubes (NTs) with three different structures ...
  • Self-Organized Three-Dimensional Nanostructured Architectures in Bulk GaN Generated by Spatial Modulation of Doping 
    TIGINYANU, Ion; STEVENS-KALCEFF, Marion A.; SARUA, Andrei; BRANISTE, Tudor; MONAICO, Eduard; POPA, Veaceslav; ANDRADE, Hugo D.; THOMAS, James O.; RAEVSCHI, Simion; SCHULTE, Karl; ADELUNG, Rainer (The Electrochemical Society, 2016)
    Self-organized 3D nanostructured architectures including quasi-ordered concentric hexagonal structures generated during the growth of single crystalline n-GaN substrates by hydride vapor phase epitaxy (HVPE) are reported. ...
  • Sensing up to 40atm Using Pressure-Sensitive Aero-GaN 
    DRAGOMAN, Mircea; CIOBANU, Vladimir; SHREE, Sindu; DRAGOMAN, Daniela; BRANISTE, Tudor; RAEVSCHI, Simion; DINESCU, Adrian; SARUA, Andrei; MISHRA, Yogendra K.; PUGNO, Nicola; ADELUNG, Rainer; TIGINYANU, Ion (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2019)
    This work reports on the fabrication and characterization of a robust pressure sensor based on aero-GaN. The ultraporous aeromaterial consists of GaN interconnected hollow micro-tetrapods with the wall thickness of about ...
  • Surface charge lithography for GaN micro- and nanostructuring 
    TIGINYANU, Ion M.; POPA, Veaceslav; SARUA, Andrei; HEARD, Peter J.; VOLCIUC, Olesea; KUBALL, Martin (Society of Photo-Optical Instrumentation Engineers, SPIE, 2009)
    We demonstrate the possibility for controlled micro- and nanostructuring of GaN layers by low-dose focusedion-beam (FIB) treatment with subsequent photoelectrochemical (PEC) etching. The proposed novel maskless approach ...

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