1. Nano Thin Films and Solid State Gas Sensor Devices Laboratory
2. Department of Electronics and Telecommunication Engineering
3. Indian Institute of Engineering Science and Technology
4. Howrah
5. India
6. Graduate Institute of Photonics and Optoelectronics
7. National Taiwan University
8. Taipei 10617
9. Taiwan
10. Department of Physics
11. National Chung Hsing University
12. Taichung 40227
13. Department of Metallurgy and Materials Engineering
14. Howrah-711103
15. Institute of Micro- and Nanomaterials
16. Ulm University
17. 89081 Ulm
18. Germany