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RISS 인기검색어
- 검색키워드
- 저자 : AmitL.Sharma (검색결과 3 건)
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AmitL.Sharma,S.Annapoorni,말호트라 한국물리학회 2003 Current Applied Physics Vol.3 No.2, 3
Poly(2-uoroaniline) has been electrochemically deposited on ITO coated glass plates in the form of thin lms using 4 M per-chloric acid as electrolyte. These polymeric lms have been spectroscopically characterized by FT-IR and UV-visible spectropho-tometric methods. Room temperature electrical conductivity of the polymeric lms was measured and found to be lower than that ofpolyaniline lms. The SEM studies show the blunt needle like surface morphology of the polymeric lm.physical adsorption method. The redox characterization of poly(2-uoroaniline) and poly(2-uoroaniline)/GOX lms has beencarried out by cyclic voltammetry technique. Amperometric detection ofb-glucose was carried out by using the above enzymeimmobilized polymeric lm as a working electrode and Ag/AgCl as a reference electrode at a bias voltage of 0.2 V over a physi-ological range. The electrode carrying GOX was found to be stable up to 32 days.. 2002 Elsevier Science B.V. All rights reserved.
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PrashantSonar,AmitL.Sharma,AmitaChandra,KlausMuellen,AlokSrivastava 한국물리학회 2003 Current Applied Physics Vol.3 No.2, 3
In recent times, blended polymers have shown a lot of promise in terms of easy processability in dierent shapes and forms. In thepresent work, polyaniline emeraldine base (PANi-EB) was doped with camphor sulfonic acid (CSA) and combined with the con-and PANiPVC blended polymers. It is well known that PANi when doped with CSA becomes highly conducting. However, itspoor mechanical properties, such as low tensile, compressive, and exural strength render PANi a non-ideal material to be processedfor its various practical applications, such as electromagnetic shielding, anti-corrosion shielding, photolithography and micro-electronic devices etc. Thus the search for polymers which are easily processable and are capable of showing high conductivity stillcontinues.PANiPVC blend was prepared, which showed low conductivity which is limiting factor for certain applications. Therefore,forms. Therefore, a blend mixture was prepared by using PANi and PF through the use of CSA as a counter ion which forms a‘‘bridge’’ between the two polymeric components of the inter-polymer complex.Two blended polymers have been synthesized and investigated for their conductivity behaviour. It was observed that the blendedlm of CSA doped PANiPVC showed a room temperature electrical conductivity of 2:8 . 10. 7 S/cm where as the blended lmmade by CSA doped PANi with conducting polymer PF showed a room temperature conductivity of 1:3 . 10. 5 S/cm.Blended lms were irradiated with 100 MeV silicon ions with a view to increase their conductivity with a uence ranging from1011 ions to 1013 per cm2 from 15 UD Pelletron accelerator at NSC, New Delhi.. 2002 Elsevier Science B.V. All rights reserved.
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An experimental set-up for the study of electromechanical properties of conducting polymer films
RajanBatra,AmitL.Sharma,ManojK.Pandey,K.K.Saini,말호트라 한국물리학회 2003 Current Applied Physics Vol.3 No.2, 3
An experimental set-up have been designed and fabricated to study the electromechanical properties of a thick film of conducting polymer under load. Extension of the films versus voltage has been measured in terms of change in capacitance of parallel plate capacitor constituted by metal pan and a fixed metal plate. HP 4284A impedance analyzer measures absolute value of the capacitance. Change in capacitance is related to change in distance by pre-calibrating the assembly using traveling microscope. A computer programme is developed to convert the capacitance value with the corresponding distance and simultaneously plotting the graph between changes in length of polymer film versus applied voltage. The assembly has been used to study the electrochemomechanical behavior of solution cast polyaniline films (50 l thick). During first cycle the length is enhanced by about 6% of original value, while repetitive value of extension is ffi2.8%, in subsequent cycles. This value closely matches to that reported in literatures. 2002 Elsevier Science B.V. All rights reserved.
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