"Role of oxygen functional group in graphene oxide for reversible room-temperature NO2 sensing"
Y.R. Choi, Y. -G. Yoon, K. S. Choi, J. H. Kang, Y. -S. Shim, Y. H. Kim, H. J.Chang, J. -H. Lee, C. R. Park, S. Y. Kim, and H. W. Jang
Carbon 91, 178-187 (2015)