A novel label-free multi-throughput optical biosensor based on localized surface plasmon resonance

• Published in: Biosensors & bioelectronics Vol. 24; no. 7; pp. 2255 - 2259
• Main Authors: Huang, Haowen, He, Chaocai, Zeng, Yunlong, Xia, Xiaodong, Yu, Xianyong, Yi, Pinggui, Chen, Zhong
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 15.03.2009; Elsevier
• Subjects: Biological and medical sciences; Biosensing Techniques - instrumentation; Biosensors; Biotechnology; Equipment Design; Equipment Failure Analysis; Fundamental and applied biological sciences. Psychology; Gold nanorods; Immunoassay - instrumentation; Label-free; Localized surface plasmon resonance; Longitudinal plasmon wavelength; Methods. Procedures. Technologies; Optical Devices; Protein Interaction Mapping - instrumentation; Reproducibility of Results; Sensitivity and Specificity; Staining and Labeling; Surface Plasmon Resonance - instrumentation; Surface Plasmon Resonance - methods; Various methods and equipments; Longitudinal plasmon wavelength; Gold nanorods; Localized surface plasmon resonance; Label-free; Gold; Biosensor; Optical sensor; Resonance; Surface plasmon
• ISSN: 0956-5663; 1873-4235; 1873-4235
• DOI: 10.1016/j.bios.2008.10.013

A novel and sensitive multi-throughput localized surface plasmon resonance (MLSPR) biosensor was developed for the first time. Various gold nanorods with different aspect ratios were used to fabricate the optical sensor. Five kinds of gold nanorods with different aspect ratios were chosen to construct five throughputs of MLSPR. Various LSPR peaks imply that different acceptor–ligand pairs can be detected simultaneously in the wavelength range from 530 to 940nm. The biosensor immobilized on glass slides was applied to label-free detection between acceptor and ligand. The MLSPR-based optical biosensor can be used to detect three antigen–antibody pairs simultaneously. The biosensor proposed herein is easy to fabricate, and its operation procedure is convenient as labeling procedure is unnecessary.