Surface Morphology and Optical Properties of 3 Porphyrin/Au and Au/Porphyrin/Au Systems

0422545 - ÚCHP 2014 RIV US eng J - Journal Article
Kalachyova, Y. - Lyutakov, O. - Solovyev, Andrey - Slepička, P. - Švorčík, V.
Surface Morphology and Optical Properties of 3 Porphyrin/Au and Au/Porphyrin/Au Systems.
Nanoscale Research Letters. Roč. 8, DEC 27 (2013), s. 547. ISSN 1931-7573. E-ISSN 1556-276X
Grant - others:GA ČR(CZ) GPP108/11/P840; GA ČR(CZ) GAP108/12/1168
Program: GA
Institutional support: RVO:67985858
Keywords : nanostructures * gold * porphyrin * luminescence * enhancement * surface morphology
Subject RIV: JJ - Other Materials
Impact factor: 2.481, year: 2013

Porphyrin/Au and Au/porphyrin/Au systems were prepared by vacuum evaporation and vacuum sputtering onto glass substrate. The surface morphology of as-prepared systems and those subjected to annealing at 160[degree sign]C was studied by optical microscopy, atomic force microscopy, and scanning electron microscopy techniques. Absorption and luminescence spectra of as-prepared and annealed samples were measured. Annealing leads to disintegration of the initially continuous gold layer and formation of gold nanoclusters. An amplification of Soret band magnitude was observed on the Au/meso-tetraphenyl porphyrin (TPP) system in comparison with mere TPP. Additional enhancement of luminescence was observed after the sample annealing. In the case of sandwich Au/porphyrin/Au structure, suppression of one of the two porphyrins' luminescence maxima and sufficient enhancement of the second one were observed.
Permanent Link: http://hdl.handle.net/11104/0228675