Dresden 2009 – scientific programme

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O: Fachverband Oberflächenphysik

O 19: Nanostructures at surfaces: Arrays

O 19.7: Talk

Tuesday, March 24, 2009, 12:00–12:15, SCH A215

Photoluminescence quenching of PS and its use as template to confine R6G — •Pushpendra Kumar¹, Manash Ghosh¹, Peter Lemmens¹, Frank Ludwig², and Meinhard Schilling² — ¹IPKM, TU Braunschweig, Germany — ²EMG, TU Braunschweig, Germany

The different chemical treatment including Ag nanoparticle deposition was carried out on the electrochemically formed mesoporous silicon (PS) to investigate the PL quenching of PS and its further use as a porous template to confine the rhodamine 6G (R6G). For all states of preparation of PS sample, PL and UV/VIS transmission spectroscopy was measured. In the final state the complete quenching of PL was observed. From our transmission measurements we concluded that the quenching of PL is attributed to a fundamental disruption of the luminescence mechanism. R6G is then confined to PL quenched PS sample. The blue shift in the R6G PL peak is observed compare to bulk R6G. The shift in R6G peak is attributed to a confining effect.