Reverse biased Pt/nanostructured MoO3/SiC Schottky diode based hydrogen gas sensors

Yu, J.; Ippolito, S. J.; Shafiei, M.; Dhawan, D.; Wlodarski, W.; Kalantar-zadeh, K.
January 2009
Applied Physics Letters;1/5/2009, Vol. 94 Issue 1, p013504
Academic Journal
Pt/nanostructured molybdenum oxide (MoO3)/SiC Schottky diode based gas sensors were fabricated for hydrogen (H2) gas sensing. Due to the enhanced performance, which is ascribed to the application of MoO3 nanostructures, these devices were used in reversed bias. MoO3 characterization by scanning electron microscopy showed morphology of randomly orientated nanoplatelets with thicknesses between 50 and 500 nm. An α-β mixed phase crystallographic structure of MoO3 was characterized by x-ray diffraction. At 180 °C, 1.343 V voltage shift in the reverse I-V curve and a Pt/MoO3 barrier height change of 20 meV were obtained after exposure to 1% H2 gas in synthetic air.


Related Articles

  • Synthesis and characterization of MoO3 nanostructures by solution combustion method employing morphology and size control. Parviz, D.; Kazemeini, M.; Rashidi, A. M.; Jozani, Kh. Jafari // Journal of Nanoparticle Research;May2010, Vol. 12 Issue 4, p1509 

    Molybdenum oxide nanostructures were synthesized utilizing the solution combustion method where the ammonium molybdate powder and an organic additive were used as precursors. Different organic additives including ethylene diamine tetra-acetic acid (EDTA), polyethylene glycol 200 (PEG 200),...

  • Analysis and Structural Investigations of CdS/Quartz Nanostructures. Al-Douri, Y.; Hashim, U. // Advanced Materials Research;2014, Issue 925, p374 

    CdS nanostructures deposited on quartz substrates with spin coating speeds 1000, 3000 and 5000 rpm and annealed at 800 °C are prepared by sol-gel spin coating technique. Ratio of cadmium to thiourea molar is 0.1:0.05 as an indication of nanostructured CdS formation with a grain size of 3.83...

  • Synthesis of Hydrated Alumina with Nanosized Pores. Roy, Sukumar; Hiremath, Shilpa // Interceram: International Ceramic Review;May/Jun2013, Vol. 62 Issue 2, p112 

    Hydrated alumina with nanosized pores are synthesized by a wet chemical method under defined experimental conditions. Pore size analysis of the derived hydrated alumina suggests that nanometer-sized pores are generated during the drying process of the precipitated hydrated alumina and account...

  • Ferromagnetic Property and Synthesis of Onion-Like Fullerenes by Chemical Vapor Deposition Using Fe and Co Catalysts Supported on NaCl. Yongzhen Yang; Xuguang Liu; Yanxing Han; Wenfang Ren; Bingshe Xu // Journal of Nanomaterials;2011, p1 

    Metal-encapsulating onion-like fullerenes (M@OLFs) were synthesized by CVD at relatively low temperature (420?C) using Fe and Co nanoparticles impregnated into NaCl as catalyst. The morphology and structure of the products were characterized by field emission scanning electron microscopy,...

  • Studies on the porous scaffold made of the nano-HA/PA66 composite. Zhang Li; Li Yubao; Wang Xuejiang; Wei Jie; Peng Xuelin // Journal of Materials Science;Jan2005, Vol. 40 Issue 1, p107 

    Porous scaffolds made ofn-HA/PA66 composite were fabricated through porogen-leaching technique. The structure, phase and morphology of the scaffolds were investigated by using IR, XRD and SEM, and the physical properties were also studied. The results indicated that the two phases in the...

  • PVA assisted Copper (Cu) @ cuprous oxide (Cu2O) nanostructures via hydrothermal method. Gajendiran, J.; Rajendran, V. // Der Pharma Chemica;2012, Vol. 4 Issue 5, p1879 

    Poly (vinyl alcohol)(PVA) mediated copper (Cu) @ cuprous oxide (Cu2O) nanostructures were prepared by hydrothermal method from copper acetate and sodium citrate in the presence of water as a solvent. The obtained sample was characterized by X-ray powder diffraction(XRD),scanning electron...

  • Synthesis, characterization and gas sensitivity of MoO3 nanoparticles. Ganguly, Arnab; George, Raji // Bulletin of Materials Science;2007, Vol. 30 Issue 2, p183 

    Nanoparticles of molybdenum oxide were synthesized using the citrate sol--gel method and characterized using scanning electron microscopy and X-ray diffraction techniques. The sensitivity of the material to the presence of various gases was analysed and the particles showed higher sensitivity...

  • Películas delgadas de α-MoO3 preparadas por atomización pirolítica. Martínez, H. M.; Torres, J.; Pardo, A.; Moreno, L. C.; Alfonso, J. E.; López-Carreño, L. D. // Ingeniería y Ciencia; 

    MoO3 thin films have been deposited on clean glass slides using the spray pyrolysis technique. The samples were grown with different thicknesses by spraying on common glass substrates a solution of (ammoniummolybdatetetrahydrate) ((NH3)6Mo7O244H2O). The samples were characterized by X-ray...

  • PRODUCCIÓN DE UNA ALEACIÓN NANOESTRUCTURADA FeAl MEDIANTE ALEACIÓN MECÁNICA Y SU CARACTERIZACIÓN MICROESTRUCTURAL. Rodríguez-Díaz, Roberto. A.; Sedano, Alejandro; Molina-Ocampo, Arturo; Porcayo-Calderón, Jesús; Uruchurtu-Chavarín, Jorge; Gonzalez-Pérez, Manuel // Avances en Ciencias e Ingeniería;Oct-Dec2013, Vol. 4 Issue 4, p95 

    In this work, a Fe40Al alloy was produced by the mechanical alloying technique, from a mixture of elemental powders constituted by Fe and Al, using different milling times. The evolution of size and morphology of powders depending on the milling time was characterized by scanning electron...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics