Browsing by Author "WOLFF, Niklas"

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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-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 ...
  • Al2O3/ZnO Heterostructure-Based Sensors for Volatile Organic Compounds in Safety Applications 
    LUPAN, Oleg; SANTOS-CARBALLAL, David; MAGARIU, Nicolae; MISHRA, Abhishek Kumar; ABABII, Nicolai; KRÜGER, Helge; WOLFF, Niklas; VAHL, Alexander; BODDULURI, Mani Teja; KOHLMANN, Niklas; KIENLE, Lorenz; ADELUNG, Rainer; LEEUW, Nora H. de; HANSEN, Sandra (American Chemical Society, 2022)
    In this work, we demonstrate the sensing properties toward the most common VOCs of columnar Al2O3/ZnO heterolayer-based sensors. We have also developed an approach to tune the sensor selectivity by changing the thickness ...
  • The effect of morphology and functionalization on UV detection properties of ZnO networked tetrapods and single nanowires 
    POSTICA, Vasile; PAULOWICZ, Ingo; LUPAN, Oleg; SCHÜTT, Fabian; WOLFF, Niklas; COJOCARU, Ala; MISHRA, Yogendra Kumar; KIENLE, Lorenz; ADELUNG, Rainer (ELSEVIER, 2019)
    Rapid detection and fast response of nanoelectronic devices based on semiconducting oxides is nowadays a modern and stringent subject of research. Device performances depend mainly on the morphologies of the metal oxide ...
  • Facile fabrication of semiconducting oxide nanostructures by direct ink writing of readily available metal microparticles and their application as low power acetone gas sensors 
    SIEBERT, Leonard; WOLFF, Niklas; ABABII, Nicolai; TERASA, Maik-Ivo; LUPAN, Oleg; VAHL, Alexander; DUPPEL, Viola; QIU, Haoyi; TIENKEN, Maik; MIRABELLI, Mattia; SONTEA, Victor; FAUPEL, Franz; KIENLE, Lorenz; ADELUNG, Rainer (ELSEVIER, 2020)
    In this work, a facile two-step fabrication and characterization of printed acetone sensors based on mixed semiconducting metal oxides is introduced. The devices are fabricated by Direct Ink Writing metal microparticle ...
  • Localized Synthesis of Iron Oxide Nanowires and Fabrication of High Performance Nanosensors Based on a Single Fe2O3 Nanowire 
    LUPAN, Oleg; POSTICA, Vasile; WOLFF, Niklas; POLONSKYI, Oleksandr; DUPPEL, Viola; KAIDAS, Victor; LAZARI, Eugen; ABABII, Nicolai; FAUPEL, Franz; KIENLE, Lorenz; ADELUNG, Rainer (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2017)
    A composed morphology of iron oxide microstructures covered with very thin nanowires (NWs) with diameter of 15–50 nm has been presented. By oxidizing metallic Fe microparticles at 255 °C for 12 and 24 h, dense iron oxide ...
  • Low-Temperature Solution Synthesis of Au-Modified ZnO Nanowires for Highly Efficient Hydrogen Nanosensors 
    LUPAN, Oleg; POSTICA, Vasile; WOLFF, Niklas; SU, Jun; LABAT, Frédéric; CIOFINI, Ilaria; CAVERS, Heather; ADELUNG, Rainer; POLONSKYI, Oleksandr; FAUPEL, Franz; KIENLE, Lorenz; VIANA, Bruno; PAUPORTÉ, Thierry (American Chemical Society, 2019)
    In this research, the low-temperature single-step electrochemical deposition of arrayed ZnO nanowires (NWs) decorated by Au nanoparticles (NPs) with diameters ranging between 10 and 100 nm is successfully demonstrated for ...
  • Modulation of Electrical Conductivity and Lattice Distortions in Bulk HVPE-Grown GaN 
    WOLFF, Niklas; JORDT, Philipp; BRANISTE, Tudor; POPA, Veaceslav; MONAICO, Eduard; URSAKI, Veaceslav; PETRARU, Adrian; ADELUNG, Rainer; MURPHY, Bridget M.; KIENLE, Lorenz; TIGINYANU, Ion (The Electrochemical Society, 2019)
    The nature of self-organized three-dimensional structured architectures with spatially modulated electrical conductivity emerging in the process of hydride vapor phase epitaxial growth of single crystalline n-GaN wafers ...
  • PdO/PdO2 functionalized ZnO:Pd films for lower operating temperature H2 gas sensing 
    LUPAN, Oleg; POSTICA, Vasile; HOPPE, Mathias; WOLFF, Niklas; POLONSKYI, Oleksandr; PAUPORTÉ, Thierry; VIANA, Bruno; MAJÉRUS, Odile; KIENLE, Lorenz; FAUPEL, Franz; ADELUNG, Rainer (The Royal Society of Chemistry, 2018)
    Through this work, we propose a novel strategy to grow and modulate the density of PdO/PdO2 nanoparticles uniformly on nanostructured Pd-doped ZnO (ZnO:Pd) films by a one-step solution approach followed by thermal annealing ...
  • Properties of a single SnO2:Zn2SnO4 – Functionalized nanowire based nanosensor 
    LUPAN, Oleg; WOLFF, Niklas; POSTICA, Vasile; BRANISTE, Tudor; PAULOWICZ, Ingo; HRKAC, Viktor; MISHRA, Yogendra Kumar; TIGINYANU, Ion; KIENLE, Lorenz; ADELUNG, Rainer (ELSEVIER, 2018)
    Tin oxide nanowires (SnO2 NWs) exhibit large potential for applications in sensor and detector technology. Using a flame transport synthesis method, high-quality single crystalline SnO2 nanowires (NWs) with Zn2SnO4 dots ...
  • Single and networked CuO nanowires for highly sensitive p-type semiconductor gas sensor applications 
    LUPAN, Oleg; POSTICA, Vasile; CRETU, Vasilii; WOLFF, Niklas; DUPPEL, Viola; KIENLE, Lorenz; ADELUNG, Rainer (WILEY-VCH Verlag GmbH &Co. KGaA, Weinheim, 2016)
  • A Single ZnO Nanosheet-based UV Photodetector 
    POSTICA, Vasile; LUPAN, Oleg; PAULOWICZ, Ingo; SHREE, Sindu; WOLFF, Niklas; KUMAR MISHRA, Yogendra; KIENLE, Lorenz; ADELUNG, Rainer (Tehnica UTM, 2018)
    In this work, an individual zinc oxide (ZnO) nanosheet was integrated into a sensor device for detection of UV light with ultra-high photosensitivity. Three-dimensional (3-D) and two-dimensional (2-D) highly porous ZnO ...
  • Surface functionalization of ZnO:Ag columnar thin films with AgAu and AgPt bimetallic alloy nanoparticles as an efficient pathway for highly sensitive gas discrimination and early hazard detection in batteries 
    VAHL, Alexander; LUPAN, Oleg; SANTOS-CARBALLAL, David; POSTICA, Vasile; HANSEN, Sandra; CAVERS, Heather; WOLFF, Niklas; TERASA, Maik-Ivo; HOPPE, Mathias; CADI-ESSADEK, Abdelaziz; DANKWORT, Torben; KIENLE, Lorenz; DE LEEUW, Nora H.; ADELUNG, Rainer; FAUPEL, Franz (The Royal Society of Chemistry, 2020)
    We report herein, a novel approach to tailor the selectivity of nanocomposite thin film sensors by investigating systematically the effect of surface decoration of Ag-doped ZnO (ZnO:Ag) columnar thin films. We have used ...
  • Zinc oxide nanotetrapods with four different arm morphologies for versatile nanosensors 
    PAULOWICZ, Ingo; POSTICA, Vasile; LUPAN, Oleg; WOLFF, Niklas; SHREE, Sindu; COJOCARU, Ala; DENG, Mao; MISHRA, Yogendra Kumar; TIGINYANU, Ion; KIENLE, Lorenz; ADELUNG, Rainer (ELSEVIER, 2018)
    The structural morphology of metal oxide nano- and microstructures plays a crucial role in the performances of sensors and especially of nanosensors. Here, a simple approach on the synthesis of three-dimensional (3D) highly ...
  • ZnAl2O4-Functionalized Zinc Oxide Microstructures for Highly Selective Hydrogen Gas Sensing Applications 
    HOPPE, Mathias; LUPAN, Oleg; POSTICA, Vasile; WOLFF, Niklas; DUPPEL, Viola; KIENLE, Lorenz; TIGINYANU, Ion; ADELUNG, Rainer (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2018)
    In this work, a simple method of ZnAl2O4-functionalization of ZnO microstructures is presented. The different characterization methods (structural, chemical, and micro-Raman) demonstrated the presence of only ZnO and ZnAl2O4 ...

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