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231223s2007 xx ||||| 00| ||eng c |
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|a (NLM)17209641
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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1 |
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|a Gurau, Marc C
|e verfasserin
|4 aut
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| 245 |
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|a Measuring molecular order in poly(3-alkylthiophene) thin films with polarizing spectroscopies
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|c 2007
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|a Band
|b nc
|2 rdacarrier
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|a Date Completed 17.07.2007
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|a Date Revised 09.01.2007
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|a published: Print
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|a Citation Status MEDLINE
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|a We measured the molecular order of poly(3-alkylthiophene) chains in thin films before and after melting through the combination of several polarized photon spectroscopies: infrared (IR) absorption, variable angle spectroscopic ellipsometry (SE), and near-edge X-ray absorption fine structure (NEXAFS). The data from the various techniques can be uniformly treated in the context of the dielectric constant tensor epsilon for the film. The combined spectroscopies allow determination of the orientation distribution of the main-chain axis (SE and IR), the conjugated pi system normal (NEXAFS), and the side-chain axis (IR). We find significant improvement in the backbone order of the films after recrystallization of the material at temperatures just below the melting temperature. Less aggressive thermal treatments are less effective. IR studies show that the changes in backbone structure occur without significant alteration of the structure of the alkyl side chains. The data indicate that the side chains exhibit significant disorder for all films regardless of the thermal history of the sample
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|a Journal Article
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|a Research Support, U.S. Gov't, Non-P.H.S.
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| 650 |
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7 |
|a Polymers
|2 NLM
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| 650 |
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7 |
|a Thiophenes
|2 NLM
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| 700 |
1 |
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|a Delongchamp, Dean M
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Vogel, Brandon M
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Lin, Eric K
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Fischer, Daniel A
|e verfasserin
|4 aut
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1 |
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|a Sambasivan, Sharadha
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Richter, Lee J
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1991
|g 23(2007), 2 vom: 16. Jan., Seite 834-42
|w (DE-627)NLM098181009
|x 0743-7463
|7 nnns
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| 773 |
1 |
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|g volume:23
|g year:2007
|g number:2
|g day:16
|g month:01
|g pages:834-42
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