E-Beam Patterned Gold Nanodot Arrays on Optical Fiber Tips for Localized Surface Plasmon Resonance Biochemical Sensing

Sensors

Yongbin Lin¹  Yang Zou¹  Yuanyao Mo¹  Junpeng Guo¹ 

[1] Nano and Micro Device Center, University of Alabama in Huntsville, Huntsville, AL 35899, USA; E-Mails:

关键词: localized surface plasmon resonance sensor;    nanofabrication;    fiber optic biosensor;   

DOI  :  10.3390/s101009397

来源: mdpi

【 摘 要 】

Electron beam lithography (EBL) was used to directly pattern periodic gold nanodot arrays on optical fiber tips. Localized surface plasmon resonance of the E-beam patterned gold nanodot arrays on optical fiber tips was utilized for biochemical sensing. The advantage of the optical fiber based localized surface plasmon resonance (LSPR) sensors is the convenience to work with and work in harsh environments. An optical fiber tip LSPR refractive index sensor of 196 nm per refractive index unit (RIU) sensitivity has been demonstrated. The affinity sensing property of the fiber tip sensor was demonstrated using biotin/streptavidin as the receptor/analyte. The detection limit for streptavidin was determined to be 6 pM.

【 授权许可】

CC BY   
© 2010 by the authors; licensee MDPI, Basel, Switzerland.