Sensitivity enhancement of a surface plasmon resonance based biomolecules sensor using graphene and silicon layers

被引:293
作者
Verma, Roli [1 ]
Gupta, Banshi D. [1 ]
Jha, Rajan [2 ]
机构
[1] Indian Inst Technol Delhi, Dept Phys, New Delhi 110016, India
[2] Indian Inst Technol, Sch Basic Sci, Bhubaneswar 751013, Orissa, India
关键词
Surface plasmon; Sensor; Sensitivity; Graphene; Biomolecules; BIOSENSOR;
D O I
10.1016/j.snb.2011.08.039
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A surface plasmon resonance based biomolecules sensor using silicon and graphene layers coated over the base of the high index prism sputtered with gold has been analyzed. The graphene layer has been used to enhance the adsorption of biomolecules while the addition of silicon layer between gold and graphene increases the sensitivity. The thicknesses of gold and silicon layers along with the number of graphene layers have been optimized to achieve the best performance of the sensor in terms of sensitivity and Full Width at Half Maximum (FWHM). To see the effect of wavelength of the light source, simulations have been carried out for three different wavelengths. The best performance is obtained for 633 nm wavelength with optimized thicknesses of gold and silicon layers as 40 nm and 7 nm respectively while the optimum number of graphene layers is 2. The sensitivity obtained with optimized parameters and additional silicon layer, is more than twice the value reported in the literature. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码:623 / 631
页数:9
相关论文
共 27 条
[1]  
[Anonymous], PHYS SHOW ELECT CAN
[2]   Surface-plasmon-resonance-based fiber-optic refractive index sensor: sensitivity enhancement [J].
Bhatia, Priya ;
Gupta, Banshi D. .
APPLIED OPTICS, 2011, 50 (14) :2032-2036
[3]   Optical constants of graphene layers in the visible range [J].
Bruna, M. ;
Borini, S. .
APPLIED PHYSICS LETTERS, 2009, 94 (03)
[4]  
Charlier JC, 2008, TOP APPL PHYS, V111, P673, DOI 10.1007/978-3-540-72865-8_21
[5]  
Edwards D.F., 1985, Handbook of optical constants of solids
[6]   The rise of graphene [J].
Geim, A. K. ;
Novoselov, K. S. .
NATURE MATERIALS, 2007, 6 (03) :183-191
[7]   Sensitivity evaluation of a multi-layered surface plasmon resonance-based fiber optic sensor: a theoretical study [J].
Gupta, BD ;
Sharma, AK .
SENSORS AND ACTUATORS B-CHEMICAL, 2005, 107 (01) :40-46
[8]   Surface plasmon resonance sensors: review [J].
Homola, J ;
Yee, SS ;
Gauglitz, G .
SENSORS AND ACTUATORS B-CHEMICAL, 1999, 54 (1-2) :3-15
[9]  
Horsell DW., 2011, MICROSCOPY ANAL, V25, P9
[10]   A FIBEROPTIC CHEMICAL SENSOR-BASED ON SURFACE-PLASMON RESONANCE [J].
JORGENSON, RC ;
YEE, SS .
SENSORS AND ACTUATORS B-CHEMICAL, 1993, 12 (03) :213-220