NDLI: Nanoscopic interchain aggregate domain formation in conjugated polymer films studied by third harmonic generation near-field scanning optical microscopy

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Nanoscopic interchain aggregate domain formation in conjugated polymer films studied by third harmonic generation near-field scanning optical microscopy

Content Provider	Semantic Scholar
Author	Schaller, Richard D. Snee, Preston T. Johnson, Justin C. Lee, Lynn F. Wilson, Kevin R. Haber, Louis H. Saykally, Richard J. Nguyen, Thuc-Quyen Schwartz, Benjamin J.
Copyright Year	2002
Abstract	The electronic structure of conjugated polymer films is of current interest due to the wide range of potential applications for such materials in optoelectronic devices. A central outstanding issue is the significance of interchain electronic species in films of these materials. In this paper, we investigate the nature of interchain species in films of poly[2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylene vinylene] (MEH-PPV) both before and after thermal annealing. Our investigation employs a combination of third harmonic generation (THG) and near-field scanning optical microscopy to measure the wavelength and spatial dependence of the THG efficiency. These chemically selective imaging measurements reveal new, low-energy absorption features in nanometer-scale spatially distinct regions of annealed films that are only infrequently observed prior to annealing. This suggests that the polymer strands in annealed MEH-PPV films pack together closely enough that significant ground-state wave function overlap can occ...
Starting Page	6688
Ending Page	6698
Page Count	11
File Format	PDF HTM / HTML
DOI	10.1063/1.1499479
Alternate Webpage(s)	http://www.cchem.berkeley.edu/rjsgrp/publications/papers/2002/266_schaller_2002.pdf
Alternate Webpage(s)	http://www.chem.ucla.edu/dept/Faculty/schwartz/schwartz_pubs/JCP_117_6688_2002.pdf
Alternate Webpage(s)	https://doi.org/10.1063/1.1499479
Volume Number	117
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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