Hybrid cavity-coupled plasmonic biosensors for low concentration, label-free and selective biomolecular detection.

被引:12
作者
Vazquez-Guardado, Abraham [1 ,2 ]
Smith, Alexandra [2 ,3 ]
Wilson, Wade [4 ]
Ortega, Jeanette [5 ]
Perez, J. Manuel [2 ,3 ,4 ]
Chanda, Debashis [1 ,2 ,4 ,6 ]
机构
[1] Univ Cent Florida, Coll Opt & Photon, CREOL, Orlando, FL 32816 USA
[2] Univ Cent Florida, NanoSci Technol Ctr, Orlando, FL 32826 USA
[3] Univ Cent Florida, Dept Chem, Orlando, FL 32816 USA
[4] Univ Cent Florida, Dept Elect & Comp Engn, Orlando, FL 32816 USA
[5] Johns Hopkins Univ, Dept Mat Sci & Engn, Baltimore, MD 21218 USA
[6] Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA
来源
OPTICS EXPRESS | 2016年 / 24卷 / 22期
基金
美国国家科学基金会;
关键词
RESONANCE; SENSITIVITY; EXOSOMES; SPECTROSCOPY; NANOCAVITIES; MODES; MERIT; EYE;
D O I
10.1364/OE.24.025785
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Simple optical techniques that can accurately and selectively identify organic and inorganic material in a reproducible manner are of paramount importance in biological sensing applications. In this work, we demonstrate that a nanoimprinted plasmonic pattern with locked-in dimensions supports sharp deterministic hybrid resonances when coupled with an optical cavity suitable for high sensitive surface detection. The surface sensing property of this hybrid system is quantified by precise atomic layer growth of aluminum oxide using the atomic layer deposition technique. The analyte specific sensing ability is demonstrated in the detection of two dissimilar analytes, inorganic amine-coated iron oxide nanoparticles and organic streptavidin protein. Femto to nanomolar detection limits were achieved with the proposed coupled plasmonic system based on the versatile and robust soft nanoimprinting technique, which promises practical low cost biosensors. (C) 2016 Optical Society of America
引用
收藏
页码:25785 / 25796
页数:12
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