Please use this identifier to cite or link to this item: http://prr.hec.gov.pk/jspui/handle/123456789/693
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dc.contributor.authorYASEEN, MUHAMMAD-
dc.date.accessioned2017-11-29T06:03:38Z-
dc.date.available2017-11-29T06:03:38Z-
dc.date.issued2010-
dc.identifier.uri http://prr.hec.gov.pk/jspui/handle/123456789//693-
dc.description.abstractIn this study, an organic semiconductor 5,10, 15,20-tetrakis(4 0 -isopropylphenyl) porphyrin (TIPP) was synthesized and investigated as an active material in sur- face-type multifunctional sensor. As electrodes, 100 nm thick Ag films were deposited on 25 mm 9 25 mm glass substrate with 40 lm gap between them. Thin film of TIPP of area 15 mm 9 15 mm was thermally sublimed to cover the gap between the silver electrodes. Thickness of TIPP film was 100 nm. A change in electrical resistance and capacitance of the fabricated device was observed with the increase in relative humidity (RH), temperature, and illu- mination. Hysteresis, response, and recovery times were investigated over a wide range of RH (0–94%). Activation energy of the TIPP was estimated. An equivalent circuit of the Ag/TIPP/Ag humidity, temperature, and illumination sensor was developed. Humidity, temperature, illumination dependent capacitive, and resistive properties of this sensor make it promising for use in a humidity, temperature, and lux multi-meters.en_US
dc.description.sponsorshipHigher Education Commission, Pakistanen_US
dc.language.isoenen_US
dc.publisherUniversity of the Punjab, Lahore, Pakistanen_US
dc.subjectNatural Sciencesen_US
dc.subjectChemistry & allied sciencesen_US
dc.subjectPhysical chemistryen_US
dc.subjectTechniques, equipment & materialsen_US
dc.subjectAnalytical chemistryen_US
dc.subjectInorganic chemistryen_US
dc.subjectOrganic chemistryen_US
dc.subjectMineralogyen_US
dc.titleSYNTHESIS AND ELECTROCHEMICAL STUDIES OF CONJUGATEDLY LINKED MULTIPORPHYRINS AND THEIR METAL COMPLEXESen_US
dc.typeThesisen_US
Appears in Collections:PhD Thesis of All Public / Private Sector Universities / DAIs.

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