Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/67421
Title: Effects of ultra-high pressures (>3.6 GPa) on the electrical resistance of polyaniline by in situ FT-IR studies
Authors: Zeng, X.-R.
Gong, K.-C.
Weng, K.-N.
Xiao, W.-S.
Gan, W.-H.
Ko, T.-M. 
Issue Date: 12-Dec-1997
Source: Zeng, X.-R.,Gong, K.-C.,Weng, K.-N.,Xiao, W.-S.,Gan, W.-H.,Ko, T.-M. (1997-12-12). Effects of ultra-high pressures (>3.6 GPa) on the electrical resistance of polyaniline by in situ FT-IR studies. Chemical Physics Letters 280 (5-6) : 469-474. ScholarBank@NUS Repository.
Abstract: Electrical resistance measurements and FT-IR spectroscopy of polyaniline were studied in situ under ultra-high pressures generated by a diamond anvil cell (DAC). The electrical resistance of polyaniline decreased as the pressure increased, exhibiting polaron conductor characteristics. Minimum electrical resistance was observed at 3.6 GPa, about three orders of magnitude smaller than that at 1.0 GPa. Changes in electrical resistance were reversible when the pressure was below 3.6 GPa. In situ FT-IR results showed that irreversible chemical changes of the quinoid units in polyaniline molecular chains took place when the pressure exceeded 3.6 GPa, giving rise to a huge increase in electrical resistance.
Source Title: Chemical Physics Letters
URI: http://scholarbank.nus.edu.sg/handle/10635/67421
ISSN: 00092614
Appears in Collections:Staff Publications

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