Journal of Nanoparticle Research

, Volume 13, Issue 8, pp 3327–3334 | Cite as

Microwave-assisted synthesis, characterization and ammonia sensing properties of polymer-capped star-shaped zinc oxide nanostructures

  • T. Krishnakumar
  • R. Jayaprakash
  • D. Sathya Raj
  • N. Pinna
  • V. N. Singh
  • A. R. Phani
  • G. Neri
Research paper


Zinc oxide nanostructures were prepared by microwave-irradiation technique in the presence of polyvinyl pyrrolidone as a shape modifier. The synthesized nanostructures were analyzed using scanning and transmission electron microscopy, selected-area electron diffraction, X-ray diffraction, and Fourier transform infrared spectroscopy (FT-IR). Characterization techniques revealed the formation of crystalline ZnO with a star-like shaped morphology, having the crystal structure of wurtzite. The microwave irradiated samples were further investigated to exploit their electrical and sensing properties. The good sensitivity and relatively short response and recovery times of chemoresistive sensors based on star-like ZnO thick films in the monitoring of low concentration of ammonia gas in air were related to the peculiar nanostructure of the sensing layer.


Microwave synthesis Zinc oxide Semiconductor Ammonia sensor Synthesis Sensors 


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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • T. Krishnakumar
    • 1
  • R. Jayaprakash
    • 2
  • D. Sathya Raj
    • 2
  • N. Pinna
    • 3
  • V. N. Singh
    • 4
  • A. R. Phani
    • 5
  • G. Neri
    • 6
  1. 1.Nanotechnology Laboratory, Department of PhysicsVMKV Engineering College, Vinayaka Mission UniversitySalemIndia
  2. 2.Nanotechnology Laboratory, Department of PhysicsSri Ramakrishna Mission Vidyalaya College of Arts and ScienceCoimbatoreIndia
  3. 3.Department of ChemistryCICECO, University of AveiroAveiroPortugal
  4. 4.Thin Film Laboratory, Department of PhysicsIndian Institute of Technology, Delhi, Hauz KhasNew DelhiIndia
  5. 5.Nano-RAM TechnologiesBangaloreIndia
  6. 6.Department of Industrial Chemistry and Materials EngineeringUniversity of MessinaMessinaItaly

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