Enhancement of the intrinsic fluorescence of adenine using aluminum nanoparticle arrays

Year: 2015

Authors: Jha S.K., Mojarad N., Agio M., Löffler J.F., Ekinci Y.

Autors Affiliation: Laboratory of Metal Physics and Technology, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland; Laboratory of Micro- and Nanotechnology, Paul Scherrer Institute, 5232 Villigen-PSI, Switzerland; Department of Mechanical and Process Engineering, ETH Zurich, 8803 Rüschlikon, Switzerland; National Institute of Optics (CNR-INO) and European Laboratory for Nonlinear Spectroscopy (LENS), 50019 Sesto Fiorentino, Italy

Abstract: This study demonstrates the metal-enhanced fluorescence of adenine using aluminum nanoparticle arrays in the deep UV range. It achieves the reproducible intensity enhancement of intrinsic fluorescence up to 80 on well-defined aluminum nanoparticle arrays at 257 nm excitation. In addition to a high signal enhancement, a strong modification of the fluorescence emission spectrum of adenine is observed. This study illustrates that the label-free detection of DNA bases and proteins that have low intrinsic fluorescence and absorption bands in the deep UV range can be facilitated using aluminum nanostructures. (C) 2015 Optical Society of America

Journal/Review: OPTICS EXPRESS

Volume: 23 (19)      Pages from: 24719  to: 24729

More Information: Financial supports by an ETH Research Grant (TH-29/07-3) and a SNF Grant (200020_149891) are gratefully acknowledged. Part of this work was performed at the Swiss Light Source (SLS), Paul Scherrer Institute, Switzerland.
KeyWords: Aluminum; Emission spectroscopy; Metal nanoparticles; Nanoparticles; Nanostructures; Aluminum nanoparticles; DNA basis; Fluorescence emission spectra; High signals; Intensity enhancement; Intrinsic fluorescence; Label-free detection; Metal enhanced fluorescence; Fluorescence
DOI: 10.1364/OE.23.024719

Citations: 27
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