Surface-enhanced fluorescence from metal sculptured thin films with application to biosensing in water

被引：65

作者：

Abdulhalim, I. ^{[1
]}

Karabchevsky, Alina ^{[1
]}

Patzig, Christian ^{[2
]}

Rauschenbach, Bernd ^{[2
]}

Fuhrmann, Bodo ^{[3
]}

Eltzov, Evgeni ^{[4
]}

Marks, Robert ^{[5
]}

Xu, Jian ^{[6
]}

Zhang, Fan ^{[6
]}

Lakhtakia, Akhlesh ^{[6
]}

机构：

[1] Ben Gurion Univ Negev, Dept Electroopt Engn, IL-84105 Beer Sheva, Israel

[2] Leibniz Inst Oberflachenmodifizierung eV, D-04318 Leipzig, Germany

[3] Univ Halle Wittenberg, Interdisziplinares Zentrum Mat Wissensch, D-06120 Halle, Germany

[4] Ben Gurion Univ Negev, Dept Environm Engn, IL-84105 Beer Sheva, Israel

[5] Ben Gurion Univ Negev, Dept Biotechnol Engn, Natl Inst Biotechnol Negev, IL-84105 Beer Sheva, Israel

[6] Penn State Univ, Dept Engn Sci & Mech, University Pk, PA 16802 USA

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 06期

关键词：

aluminium; biosensors; copper; fluorescence; gold; metallic thin films; porous materials; silver; DEPOSITION; SILICON; NANOSTRUCTURES;

D O I：

10.1063/1.3081031

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Surface-enhanced fluorescence from porous, metallic sculptured thin films (STFs) was demonstrated for sensing of bacteria in water. Enhancement factors larger than 15 were observed using STFs made of silver, aluminum, gold, and copper with respect to their dense film counterparts. The STFs used are assemblies of tilted, shaped, parallel nanowires prepared with several variants of the oblique-angle-deposition technique. Comparison between the different films indicates that the enhancement factor is higher when the tilt is either small (< 30 deg) or large (>80 deg); thus, the enhancement is higher when only a single resonance in the nanowires is excited.

引用

页数：3

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