Browsing by Author "QIU, Haoyi"

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  • Composition and Surface Optical Properties of GaSe:Eu Crystals before and after Heat Treatment 
    SPRINCEAN, Veaceslav; QIU, Haoyi; TJARDTS, Tim; LUPAN, Oleg; UNTILĂ, Dumitru; AKTAS, Cenk; ADELUNG, Rainer; LEONTIE, Liviu; CARLESCU, Aurelian; GURLUI, Silviu; CARAMAN, Mihail (MDPI (Basel, Switzerland), 2024)
    This work studies the technological preparation conditions, morphology, structural characteristics and elemental composition, and optical and photoluminescent properties of GaSe single crystals and Eu-doped b–Ga2O3 ...
  • 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 ...
  • In situ temperature-dependent properties of metal–organic framework ZIF-Coated ZnO hybrid structures: structural and advanced spectroscopic insights 
    NAGPAL, Rajat; SUGIHARA, Masaya; LUPAN, Cristian; MAGARIU, Nicolae; TJARDTS, Tim; LIZARDE, Nahomy Meling; STRUNSKUS, Thomas; JETTER, Justin; QIU, Haoyi; CHAKRABORTY, Barnika; AMERI, Tayebeh; QUANDT, Eckhard; ADELUNG, Rainer; AMELOOT, Rob; LUPAN, Oleg (ACS Publications, 2026)
    Advancements in material design, specifically the development of hybrids combining metal oxides (MOx) and zeolitic imidazolate frameworks (MOF/ZIFs), have revolutionized modern materials science by employing their synergistic ...
  • Morphological and Sensing Properties of the ZnO-Zn2SnO4 Ternary Phase Nanorod Arrays 
    LITRA, Dinu; LUPAN, Cristian; TJARDTS, Tim; QIU, Haoyi; ZADOROJNEAC, Tudor; MALAI, Dominic; SEREACOV, Alexandr; AKTAS, Cenk; SIEBERT, Leonard; LUPAN, Oleg (Springer Nature Switzerland, 2023)
    In this paper, the morphological and sensing properties of the Sn-doped ZnO-Zn2SnO4 nanorods obtained by the hydrothermal method are presented. The developed methodology exhibits high levels of efficiency and cost-effectiveness, ...
  • Photodetector Based on β-Ga2O3 Nanowires on GaSxSe1-X Solid Solution Substrate 
    SPRINCEAN, Veaceslav; CARAMAN, Mihail; QIU, Haoyi; TJARDTS, Tim; SEREACOV, Alexandr; AKTAS, Cenk; ADELUNG, Rainer; LUPAN, Oleg (Springer Nature Switzerland, 2023)
    The detection of radiation in the ultraviolet C (UVC) region (100–280 nm) is of great importance for numerous technical applications, such as fire detection in security devices, tracking astronomical missile trajectories, ...
  • Synthesis and properties of β-Ga2O3 nanowires and nanosheets on doped GaS:Mn substrates 
    SPRINCEAN, Veaceslav; QIU, Haoyi; LUPAN, Oleg; TJARDTS, Tim; PETERSEN, Deik; VEZIROGLU, Salih; ADELUNG, Rainer; CARAMAN, Mihail (Elsevier, 2024)
    In this work, the synthesis, morphology, optical and luminescence properties of Mn-doped β-Ga2O3 (Ga2O3:Mn) nanowires/nanosheets on Mn-doped GaS (GaS:Mn) substrate are studied. The aim was to obtain structures of semiconductors ...
  • Synthesis and properties of β-Ga2O3 nanowires and nanosheets on doped GaS:Mn substrates 
    SPRINCEAN, Veaceslav; QIU, Haoyi; LUPAN, Oleg; TJARDTS, Tim; PETERSEN, Deik; VEZIROGLU, Salih; ADELUNG, Rainer; CARAMAN, Mihail (Elsevier, 2024)
    In this work, the synthesis, morphology, optical and luminescence properties of Mn-doped β-Ga2O3 (Ga2O3:Mn) nanowires/nanosheets on Mn-doped GaS (GaS:Mn) substrate are studied. The aim was to obtain structures of semiconductors ...
  • Ultra-selective hydrogen sensors based on CuO - ZnO hetero-structures grown by surface conversion 
    CHAKRABORTY, Barnika; LITRA, Dinu; MISHRA, Abhishek Kumar; LUPAN, Cristian; NAGPAL, Rajat; MISHRA, Soni; QIU, Haoyi; RAILEAN, Serghei; LUPAN, Oleg; DE LEEUW, Nora H.; ADELUNG, Rainer; SIEBERT, Leonard (Elsevier, 2024)
    Synergistic effects of mixed oxides have the potential to improve sensing performances of environmental, domestic and industrial monitoring devices. However, mixed oxides often come in the form of separate particles and ...
  • A versatile synthesis approach and interface characterization of t‑ZnO@metal hydroxide/oxide heterostructures 
    CHAKRABORTY, Barnika; TJARDTS, Tim; ZELLER-PLUMHOFF, Berit; SCHÜRMANN, Ulrich; DAVYDOK, Anton; FLORIAN WIELAND, Dietmar Christian; QIU, Haoyi; REIßMANN, Alexander; MELING-LIZARDE, Nahomy; NAGPAL, Rajat; STRUNSKUS, Thomas; SIEBERT, Leonard; ADELUNG, Rainer (American Chemical Society, 2026)
    Functional ceramics play a key role in technology, particularly in piezoelectric sensors and actuators, ferroelectric power generation, and durable semiconductors used in sensors and memristors. In this study, we report a ...
  • ZIF-71-coated CuO:Al with enhanced gas-sensing performance for n‑Butanol and hydrogen 
    NAGPAL, Rajat; SUGIHARA, Masaya; LUPAN, Cristian; TJARDTS, Tim; MELING-LIZARDE, Nahomy; STRUNSKUS, Thomas; QIU, Haoyi; ADELUNG, Rainer; AMELOOT, Rob; LUPAN, Oleg (American Chemical Society, 2025)
    In this study, hybrid materials combine metal-organic framework (MOF)-zeolitic imidazolate framework (ZIF) with inorganic metal-oxide semiconductors, resulting in composite materials that exhibit synergistic properties and ...

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