Block Copolymer Derived Vertically Coupled Plasmonic Arrays for Surface-Enhanced Raman Spectroscopy

被引：29
作者：
Akinoglu, Goekalp Engin [1 ,2 ,3 ]
Mir, Sajjad Husain [1 ,2 ]
Gatensby, Riley [1 ,2 ]
Rydzek, Gaulthier [1 ,2 ]
Mokarian-Tabari, Parvaneh [1 ,2 ]
机构：
[1] Univ Dublin, Trinity Coll Dublin, Adv Mat & BioEngn Res Ctr AMBER, Dublin 2, Ireland
[2] Univ Dublin, Trinity Coll Dublin, Sch Chem, Dublin 2, Ireland
[3] Free Univ Berlin, Dept Phys, D-14195 Berlin, Germany
来源：
ACS APPLIED MATERIALS & INTERFACES | 2020年 / 12卷 / 20期
基金：
爱尔兰科学基金会; 欧盟地平线“2020”;
关键词：
surface-enhanced Raman spectroscopy; block copolymer lithography; nanofabrication; plasmonic nanomaterials; finite difference time domain simulation; 4-aminothiophenol; SERS uniformity; LARGE-AREA; THIN-FILMS; NANOPILLAR ARRAYS; SCATTERING; SERS; AG; NANOPARTICLE; LITHOGRAPHY; FABRICATION; RESONANCES;
D O I：
10.1021/acsami.0c03300
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A surface-enhanced Raman spectroscopy sensing template consisting of gold-covered nanopillars is developed. The plasmonic slab consists of a perforated gold film at the base of the nanopillars and a Babinet complementary dot array on top of the pillars. The nanopillars were fabricated by the incorporation of an iron salt precursor into a self-assembled block copolymer thin film and subsequent reactive ion etching. The preparation is easy, scalable, and cost-effective. We report on the increase in surface-enhanced Raman scattering efficiency for smaller pillar heights and stronger coupling between the dot array and perforated gold film with average enhancement factors as high as 107. In addition, the block copolymer-derived templates show an excellent relative standard deviation of 8% in the measurement of the Raman intensity. Finite difference time domain simulations were performed to investigate the nature of the electromagnetic near-field enhancement and to identify plasmonic hot spots.
引用
收藏
页码：23410 / 23416
页数：7
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