Synthesis Time and Temperature Effect on Polyaniline Morphology and Conductivity
Palash Chandra Maity,
Mudrika Khandelwal
Issue:
Volume 1, Issue 4, November 2016
Pages:
37-42
Received:
2 September 2016
Accepted:
26 September 2016
Published:
1 November 2016
DOI:
10.11648/j.ajmsp.20160104.11
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Abstract: This paper studies the effect of time and temperature of polymerisation on morphology and conductivity of polyaniline which is produced by oxidative polymerisation. It has been reported that with decrease in temperature and increase in polymerisation duration, the yield and particle size increases. The polyaniline particles are rod-like at the onset of polymerisation and also at low polymerisation temperature. The conductivity has been determined by four-point measurement with incorporation of correction factor. It was found that the electrical conductivity varies from below 0.5 S/cm to over 11 S/cm with variation in duration and temperature of polymerization. Conductivity is proposed to be dependent on the particle size as conductivity increases with decrease in polymerisation temperature and increase in polymerisation duration, similar to the trend observed for particle size. This may be indicative of equal probability of inter- chain and intra-chain charge transport.
Abstract: This paper studies the effect of time and temperature of polymerisation on morphology and conductivity of polyaniline which is produced by oxidative polymerisation. It has been reported that with decrease in temperature and increase in polymerisation duration, the yield and particle size increases. The polyaniline particles are rod-like at the onse...
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Effect of Lattice Strain on the Debye-Waller Factor of CuInSe2 Nanoparticles
Issue:
Volume 1, Issue 4, November 2016
Pages:
43-46
Received:
6 September 2016
Accepted:
24 November 2016
Published:
9 January 2017
DOI:
10.11648/j.ajmsp.20160104.12
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Abstract: CuInSe2 synthesized by a modified solvothermal route could be altered considerably by controlling the reaction temperature, reaction time and washing agents. Synthesized CuInSe2 powders were characterized by X-ray diffraction. The particle size (t), lattice strain (ε) and Debye-Waller factor (B) were determined from the half-widths and integrated intensities of the Bragg reflections. The particle shape was spherical when demonized water was used as washing agent. Particles with the size down to 25.8nm were obtained. The variation of energy of vacancy formation as a function of lattice strain has been studied.
Abstract: CuInSe2 synthesized by a modified solvothermal route could be altered considerably by controlling the reaction temperature, reaction time and washing agents. Synthesized CuInSe2 powders were characterized by X-ray diffraction. The particle size (t), lattice strain (ε) and Debye-Waller factor (B) were determined from the half-widths and inte...
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Physical, Chemical Properties and Applications of Transformer Oil Based Ferrofluid/Dielectric Fluid
S. R. Chitra,
V. Gayathri
Issue:
Volume 1, Issue 4, November 2016
Pages:
47-55
Received:
19 September 2016
Accepted:
9 October 2016
Published:
12 January 2017
DOI:
10.11648/j.ajmsp.20160104.13
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Abstract: Ferrofluid is colloidal system poised of single domain of nanoparticles dispersed in a carrier liquid. Ferrofluid bargain incredible new potentials to improve heat transfer performance compared with pure liquids and can be watchful to be the next-generation of heat transfer fluids. In the present work Fe3O4 nanoparticles were synthesized by co-precipitation chemical synthesis, and were coated with oleic acid as surfactant agent. Owing to their excellent characteristics, ferrofluid find varied applications in enhancing heat transfer. Research work on the concept, heat transfer enhancement mechanism, and application of the ferrofluid is still in its primary stage. This study affords an investigation in this field with focus on applications of ferrofluid due to their thermophysical and electrical properties.
Abstract: Ferrofluid is colloidal system poised of single domain of nanoparticles dispersed in a carrier liquid. Ferrofluid bargain incredible new potentials to improve heat transfer performance compared with pure liquids and can be watchful to be the next-generation of heat transfer fluids. In the present work Fe3O4 nanoparticles were synthesized by co-prec...
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