Oleg Mirzov
Systemarkitekt
Fate of Excitations in Conjugated Polymers: Single-Molecule Spectroscopy Reveals Nonemissive "Dark" Regions in MEH-PPV Individual Chains.
Författare
Summary, in English
Single chains of the conjugated polymer MEH-PPV (poly(2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylenevinylene)) were studied with wide-field fluorescence microscopy (dispersion in inert polymer matrices) and with fluorescence correlation spectroscopy (chloroform solution). The fluorescence yield of individual molecules in matrices was found to be 1-2 orders of magnitude lower than that in solution and it decreased substantially with increasing chain length. It suggests that isolation of MEH-PPV molecules in polymer matrices creates favorable conditions for photogeneration of nonemissive primary excited states.
Avdelning/ar
- Kemisk fysik
- Tillämpad biokemi
Publiceringsår
2009
Språk
Engelska
Sidor
4456-4461
Publikation/Tidskrift/Serie
Nano Letters
Volym
9
Dokumenttyp
Artikel i tidskrift
Förlag
The American Chemical Society (ACS)
Ämne
- Nano Technology
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 1530-6992