Hostname: page-component-78c5997874-j824f Total loading time: 0 Render date: 2024-11-14T13:20:23.926Z Has data issue: false hasContentIssue false

Effect of Thermal Treatments on the Transduction Behaviors of Conductometric Hydrogen Gas Sensors Integrated with HCl-Doped Polyaniline Nanofibers

Published online by Cambridge University Press:  01 February 2011

Pen-Cheng Wang
Affiliation:
pwang0@sas.upenn.edu, University of Pennsylvania, Department of Chemistry, Philadelphia, PA, 19104, United States
Yaping Dan
Affiliation:
yapingd@seas.upenn.edu, University of Pennsylvania, Department of Electrical and Systems Engineering, Philadelphia, PA, 19104, United States
Luke A. Somers
Affiliation:
lsomers@sas.upenn.edu, University of Pennsylvania, Department of Physics and Astronomy, Philadelphia, PA, 19104, United States
Alan G. MacDiarmid
Affiliation:
macdiarm@sas.upenn.edu, University of Pennsylvania, Department of Chemistry, Philadelphia, PA, 19104, United States
A.T. Charlie Johnson
Affiliation:
cjohnson@physics.upenn.edu, University of Pennsylvania, Department of Physics and Astronomy, Philadelphia, PA, 19104, United States
Get access

Abstract

We present the effect of thermal treatments on the transduction behaviors of HCl-doped polyaniline (PANI) nanofibers integrated in conductometric devices upon exposure to 1% H2 (carried by N2). After drying in N2 at 25ºC for 12 hours, devices showed a ∼10% decrease in electrical resistance upon exposure to 1% H2. However, devices subject to 12-hour drying in N2 at 25ºC followed by further thermal treatments in N2 at 100ºC, 164ºC or 200ºC for 30 minutes showed different transduction behaviors. Specifically, devices subject to thermal treatments at 100ºC and 164ºC showed a decrease in electrical resistance by ∼7% and <0.5%, respectively. More interestingly, the device subject to thermal treatment at 200ºC showed a transduction behavior with opposite polarity, i.e. a ∼5% increase in electrical resistance upon exposure to 1% H2. SEM, FTIR and TGA were employed to investigate the effect of thermal treatments on the morphology and chemical characteristics of HCl-doped polyaniline nanofibers. The results indicated that the change in the devices' interesting transduction behaviors might be related to the thermal treatment effects on the HCl-doped PANI nanofibers in (i) removal of adsorbed water, and (ii) crosslinking and/or degradation of polymer backbones.

Type
Research Article
Copyright
Copyright © Materials Research Society 2008

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Cho, S.J., Song, K.S., Kim, J.W., Kim, T.H., Choo, K., Fuel Chemistry Division, 224th National Meeting of the American Chemical Society 47, 790 (2002).Google Scholar
2. Cho, S.J., Choo, K., Kim, D.P., Kim, J.W., Catal. Today 120, 336 (2007).Google Scholar
3. Huang, Q., Wei, C., Conference Abstract, 205th Meeting of the Electrochemical Society, San Antonio, TX, USA, May 9-14, 2004.Google Scholar
4. Jurczyk, M.U., Kumar, A., Srinivasan, S., Stefanakos, E., Int. J. Hydrogen Energy 32, 1010 (2007).10.1016/j.ijhydene.2006.07.012Google Scholar
5. Panella, B., Kossykh, L., Dettlaff-Weglikowska, U., Hirscher, M., Zerbi, G., Roth, S., Synth. Met. 151, 208 (2005).Google Scholar
6. MacDiarmid, A.G., Angew. Chem. Int. Ed. 40, 2581 (2001).Google Scholar
7. Virji, S., Kaner, R.B., Weiller, B.H., J. Phys. Chem. B 110, 22266 (2006).Google Scholar
8. Sadek, A.Z., Wlodarski, W., Kalantar-Zadeh, K., Baker, C., Kaner, R.B., Sens. Actuators A 139, 53 (2007).Google Scholar
9. Wang, P-C., Venancio, E.C., Sarno, D.M., MacDiarmid, A.G., unpublished results (Nanofibers of polyaniline, presented by MacDiarmid, A.G. at ONR Polymer Review Meeting, Arlington, VA, USA, May 5, 2004).Google Scholar
10. MacDiarmid, A.G., Wang, P-C., Venancio, E.C., Morphology manipulation of polymerized aniline synthesized in an aqueous medium, patent disclosure, filed September 23, 2004.Google Scholar
11. Baker, C.O., Weiller, B.H., Kaner, R.B., e-mail communications, May 22, 2006-June 12, 2006.Google Scholar
12. Tang, J., Jing, X., Wang, B., Wang, F., Synth. Met., 24, 231 (1988).Google Scholar
13. Traore, M.K., Stevenson, W.T.K., McCormick, B.J., Dorey, R.C., Wen, S., Meyers, D., Synth. Met., 40, 137 (1991).Google Scholar
14. Venancio, E.C., Wang, P-C., MacDiarmid, A.G., Heben, M.J., unpublished results.Google Scholar
15. Sun, Y., Ph.D. Thesis, 1991, University of Pennsylvania, Philadelphia, USA.Google Scholar