Electron spin resonance characterization of defects in sensor materials based on nanocrystalline tin dioxide

D. A. Grishina; A. A. Mironov; I. S. Pentegov; A. V. Marikutsa; E. A. Konstantinova

doi:10.1117/12.923460

4 May 2012 Electron spin resonance characterization of defects in sensor materials based on nanocrystalline tin dioxide

D. A. Grishina, A. A. Mironov, I. S. Pentegov, A. V. Marikutsa, E. A. Konstantinova

Proceedings Volume 8430, Optical Micro- and Nanometrology IV; 84300A (2012) https://doi.org/10.1117/12.923460
Event: SPIE Photonics Europe, 2012, Brussels, Belgium

Abstract

Nanocrystalline gas sensitive materials based on tin dioxide modified by Pd or Ru were synthesized and their interaction with CO and ammonia studied by means of in situ DC-conductivity measurements and ex situ ESR spectroscopy. Modification by Pd yields the material highly sensitive to CO in low temperature region, while Ru-modified SnO₂ is outstandingly sensitive to NH₃ at raised temperature. The materials have well detectable sensitivity to these gases on the concentration level of ambient air standards. We have detected that O₂^- and OH• radicals are the main type of spin centers in unmodified nanocrystalline tin dioxide. The modifying of tin dioxide by Pd and Ru is accompanied by formation of new spin centers in the samples: Pd⁺³ and Ru⁺³. The concentration of these paramagnetic species on the materials interacting with CO and ammonia gases decreased because of their transition to the diamagnetic state Pd⁺², Pd⁰ and Ru⁺⁴, respectively.

Citation Download Citation

D. A. Grishina, A. A. Mironov, I. S. Pentegov, A. V. Marikutsa, and E. A. Konstantinova "Electron spin resonance characterization of defects in sensor materials based on nanocrystalline tin dioxide", Proc. SPIE 8430, Optical Micro- and Nanometrology IV, 84300A (4 May 2012); https://doi.org/10.1117/12.923460

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available