TY - JOUR
T1 - Fabrication of vapor and gas sensors using films of aligned CNx nanotubes
AU - Villalpando-Páez, F.
AU - Romero, A. H.
AU - Muñoz-Sandoval, E.
AU - Martínez, L. M.
AU - Terrones, H.
AU - Terrones, M.
N1 - Funding Information:
We are indebted to Lisette Noyola, Daniel Ramı́rez and Antonio Gen-Mora for technical assistance and Marisol Reyes-Reyes, Ana Laura Elı́as, Julio Rodrı́guez, Adalberto Zamudio and Samuel Baltazar for helping in the preparation of some of the samples used in this study. We are also indebted to R. Kamalakaran, M. Mayne. H. Labitzke, M. Rühle and N. Grobert for helpful discussions and assistance at the early stages of the CN x nanotube research. We also thank CONACYT-México grants: W-8001-millennium initiative (HT, MT, AHR), G-25851-E (HT, MT), 36365-E (HT), 37589-U (MT), 39643-F (EMS), and Universidad Iberoamericana research grant for Nanoscience and Nanotechnology (MT), and for facilitating some equipment. Finally, we gratefully acknowledge the computer time allocation on the Cray T3E at the Centro Nacional de Supercómputo – IPICyT.
PY - 2004/3/1
Y1 - 2004/3/1
N2 - We have succeeded in sensing rapidly (0.1-0.5 s response), relatively low concentrations of toxic gases, and organic vapors using electric devices integrating films of aligned CNx nanotubes. We demonstrate that CNx nanotubes could be more efficient for monitoring toxic species, when compared to pure carbon nanotubes. This is due to the presence of highly reactive pyridine-like sites on the tube surface. Using ab initio calculations, we confirmed that pyridine-type regions on the tube surface bind strongly to ammonia, acetone and OH groups, thus altering their density of states. CN x nanotubes could be used as fast responsive and reusable sensors.
AB - We have succeeded in sensing rapidly (0.1-0.5 s response), relatively low concentrations of toxic gases, and organic vapors using electric devices integrating films of aligned CNx nanotubes. We demonstrate that CNx nanotubes could be more efficient for monitoring toxic species, when compared to pure carbon nanotubes. This is due to the presence of highly reactive pyridine-like sites on the tube surface. Using ab initio calculations, we confirmed that pyridine-type regions on the tube surface bind strongly to ammonia, acetone and OH groups, thus altering their density of states. CN x nanotubes could be used as fast responsive and reusable sensors.
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U2 - 10.1016/j.cplett.2004.01.052
DO - 10.1016/j.cplett.2004.01.052
M3 - Article
AN - SCOPUS:1242333067
SN - 0009-2614
VL - 386
SP - 137
EP - 143
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 1-3
ER -