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Gold Nanoparticles with Elongated Shapes: Synthesis and Optical Properties

100%

Olejnik M., Agarwal A., Zaleszczyk W., Kotov N., Mackowski S.

Acta Physica Polonica A

2012

vol. 122

issue 2

346-349

We use a seed-mediated growth to fabricate gold nanorods in water solution. By changing the amount of silver salt we demonstrate the control of aspect ratio of the obtained rods. The microscopic and spectroscopic analyses provide ways to characterize the morphology and the optical properties of the gold nanorods. Nanorods synthesized using this approach feature length of the order of 50-60 nm, which translates into longitudinal plasmon resonances in the near infrared spectrum region.

Plasmon Enhancement of Fluorescence in Single Light-Harvesting Complexes from em Amphidinium carterae

59%

Bujak Ł., Piątkowski D., Mackowski S., Wörmke S., Jung C., Bräuchle C., Agarwal A., Kotov N., Schulte T., Hofmann E., Brotosudarmo T., Scheer H., Govorov A., Hiller R.

Acta Physica Polonica A

2009

vol. 116

issue S

S-22-S-25

We show that single peridinin-chlorophyll a-protein light-harvesting complexes from dinoflagellate Amphidinium carterae placed near to silver nanoparticles show strongly enhanced fluorescence emission. Single molecule spectroscopy experiments performed at room temperature point toward an enhancement of more than an order of magnitude for optimal conditions. Irrespective of the enhancement, we observe no effect of the metal nanoparticle on the fluorescence emission energy of the complex. This result provides a way to control the optical properties of biomolecules via plasmon excitations in metal nanoparticles.

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2 Acta Physica Polonica A

1 2012

1 2009

2 Agarwal A.

2 Kotov N.

2 Mackowski S.

1 Brotosudarmo T.

1 Bräuchle C.

1 Bujak Ł.

1 Govorov A.

1 Hiller R.

1 Hofmann E.

1 Jung C.

1 Olejnik M.

1 Piątkowski D.

1 Scheer H.

1 Schulte T.

1 Wörmke S.

1 Zaleszczyk W.

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Gold Nanoparticles with Elongated Shapes: Synthesis and Optical Properties

Plasmon Enhancement of Fluorescence in Single Light-Harvesting Complexes from em Amphidinium carterae