Versatile SERS sensing based on black silicon

被引：69

作者：

Seniutinas, Gediminas ^{[1
,2
,3
]}

Gervinskas, Gediminas ^{[1
,2
,3
]}

Verma, Roli ^{[4
,5
]}

Gupta, Banshi D. ^{[4
]}

Lapierre, Florian ^{[3
,6
]}

Stoddart, Paul R. ^{[1
,2
]}

Clark, Felix ^{[1
,2
]}

McArthur, Sally L. ^{[1
,2
]}

Juodkazis, Saulius ^{[1
,2
,3
]}

机构：

[1] Swinburne Univ Technol, Fac Sci Engn & Technol, Ctr Microphoton, Hawthorn, Vic 3122, Australia

[2] Swinburne Univ Technol, Fac Sci Engn & Technol, Ind Res Inst Swinburne, Hawthorn, Vic 3122, Australia

[3] Melbourne Ctr Nanofabricat, Clayton, Vic 3168, Australia

[4] Indian Inst Technol Delhi, Dept Phys, New Delhi 110016, India

[5] Tel Aviv Univ, Raymond & Beverly Sackler Fac Exact Sci, Sch Chem, IL-6887801 Tel Aviv, Israel

[6] RMIT Univ, Sch Elect & Comp Engn, Melbourne, Vic 3000, Australia

来源：

OPTICS EXPRESS | 2015年 / 23卷 / 05期

基金：

澳大利亚研究理事会;

关键词：

ENHANCED RAMAN-SCATTERING; RANDOM PATTERNS; SURFACE; NANOSENSOR; ARRAYS; SENSOR;

D O I：

10.1364/OE.23.006763

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Black Si (b-Si) with gold or silver metal coating has been shown to be an extremely effective substrate for surface-enhanced Raman scattering (SERS). Here, we demonstrate that it is also a highly versatile SERS platform, as it supports a wide range of surface functionalizations. In particular, we report the use of a molecularly imprinted polymer (MIP) coating and a hydrophobic coating on b-Si to establish two different sensing modalities. First, using a MIP layer on Au-coated b-Si, we show selective sensing of two closely related varieties of tetracycline. Second, a hydrophobic coating was used to concentrate the analyte adsorbed on gold colloidal nanoparticles, thus increasing the sensitivity of the measurement by an order of magnitude. In this experiment, Au nanoparticles and analyte were mixed just before SERS measurements and were concentrated by drop-drying on the super-hydrophobic b-Si. These approaches are promising for SERS measurements that are sensitive to the aging of bare plasmonic metal-coated substrates. (C) 2015 Optical Society of America

引用

页码：6763 / 6772

页数：10

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