Surface morphology and optical properties of porphyrin/Au and Au/porphyrin/Au systems

Abstract

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°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.

Original language	English
Pages (from-to)	1-23
Number of pages	23
Journal	Nanoscale Research Letters
Volume	8
Issue number	1
DOIs	https://doi.org/10.1186/1556-276X-8-547
Publication status	Published - 1 Dec 2013
Externally published	Yes

Keywords

Enhancement
Gold
Luminescence
Nanostructures
Porphyrin
Surface morphology

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

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10.1186/1556-276X-8-547

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title = "Surface morphology and optical properties of porphyrin/Au and Au/porphyrin/Au systems",

abstract = "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°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.",

keywords = "Enhancement, Gold, Luminescence, Nanostructures, Porphyrin, Surface morphology",

author = "Yevgeniya Kalachyova and Oleksiy Lyutakov and Andrey Solovyev and Petr Slepi{\v c}ka and Vaclav {\v S}vor{\v c}{\'i}k",

year = "2013",

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doi = "10.1186/1556-276X-8-547",

language = "English",

volume = "8",

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journal = "Nanoscale Research Letters",

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T1 - Surface morphology and optical properties of porphyrin/Au and Au/porphyrin/Au systems

AU - Kalachyova, Yevgeniya

AU - Lyutakov, Oleksiy

AU - Solovyev, Andrey

AU - Slepička, Petr

AU - Švorčík, Vaclav

PY - 2013/12/1

Y1 - 2013/12/1

N2 - 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°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.

AB - 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°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.

KW - Enhancement

KW - Gold

KW - Luminescence

KW - Nanostructures

KW - Porphyrin

KW - Surface morphology

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