Atomic force and scanning near-field optical microscopy study of carbocyanine dye J-aggregates

0434314 - FZÚ 2015 RIV AE eng J - Článek v odborném periodiku
Prokhorov, V.V. - Petrova, M.G. - Kovaleva, Natalia - Demikhov, E.I.
Atomic force and scanning near-field optical microscopy study of carbocyanine dye J-aggregates.
Current Nanoscience. Roč. 10, č. 5 (2014), s. 700-704. ISSN 1573-4137. E-ISSN 1875-6786
Institucionální podpora: RVO:68378271
Klíčová slova: carbocyanine dye * elementary fibri * high-resolution atomic force microscopy * J-aggregate * probe microscopy * scanning near-field optical microscopy
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 1.096, rok: 2014

Atomic force microscopy (AFM) and scanning near-field optical microscopy (SNOM) imaging of fibrillar J-aggregates of carbocyanine dye 3,3'-bis(2-sulfopropyl)-5,5', 6,6'-tetrachloro-1,1'- dioctylbenzimidacarbocyanine (C8S3) have been conducted on mica and glass substrates at a room temperature. High resolution AFM imaging reveals that thick fibrils consist of narrow subfibrils with the cross diameter in the nanometer range. A model of the "elementary fibril" with the cross-dimension of 3 x 4 nm(2) was proposed as the aggregate of two J-ladders oriented face-to-face by their hydrophobic sides while the dye molecules are oriented normaly to the long fibril axis. The SNOM measurements have been conducted in the contact mode indicating the large mechanical strength on the fibrillar J-aggregate morphology.
Trvalý link: http://hdl.handle.net/11104/0238393