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<strong>Overall expanded uncertainty estimation in polaron concentration of p-toluene sulfonic acid doped polyaniline by EPR spectroscopy</strong>

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Title Statement <strong>Overall expanded uncertainty estimation in polaron concentration of p-toluene sulfonic acid doped polyaniline by EPR spectroscopy</strong>
 
Added Entry - Uncontrolled Name Arora, Manju ; "CSIR-NPL, New Delhi"
Saini, Parveen ; "CSIR-NPL, New Delhi"
 
Uncontrolled Index Term specific instrumentation and techniques of general use in physics
EPR spectroscopy, polaron, polyaniline, uncertainty estimation
 
Summary, etc. Conjugated polymers like polyaniline (PANI) are peculiar in terms that a minor change in doping level leads to only a slight change in polaron concentration but orders of magnitude change in electrical conductivity. Therefore, precise and accurate determination of polaronic concentration is essential to predict the exact doping status which is not a straight forward task. Herein, we report use of Electron Paramagnetic Resonance (EPR) spectroscopy technique for the quantitative estimation of polaron concentration in <em>p</em>-toluene sulfonic acid (PTSA) doped PANI (PANI-PTSA) samples with evaluation of overall uncertainty in the results calculated as per GUM guidelines. EPR spectra of the samples and reference were recorded under identical temperature and relative humidity conditions and all kind of uncertainty sources i.e. Type A and Type B were identified and quantified. In particular, the random effects viz. sample preparation, instrument stability, reference material, calibration of balance, operator etc. are categorized under above uncertainty sources. DPPH standard used in these measurements has spin concentration 1.5271810<sup>18</sup> ± 0.07542162410<sup>18</sup> spins/g at 95% confidence level.
 
Publication, Distribution, Etc. Indian Journal of Pure & Applied Physics (IJPAP)
2016-06-10 13:22:16
 
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http://op.niscair.res.in/index.php/IJPAP/article/view/2213
 
Data Source Entry Indian Journal of Pure & Applied Physics (IJPAP); ##issue.vol## 51, ##issue.no## 11 (2013): Indian Journal of Pure & Applied Physics
 
Language Note en
 
Nonspecific Relationship Entry http://op.niscair.res.in/index.php/IJPAP/article/download/2213/3417
http://op.niscair.res.in/index.php/IJPAP/article/download/2213/3418
 
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