Abstract
A developed Christmas-tree derived immunosensor based on a gold label silver stain (GLSS) technique was fabricated for a highly sensitive analysis of Vibrio parahaemolyticu (VP). In this strategy, captured VP antibody (cAb) was immobilized on a solid substrate; then, the VPs were sequentially tagged with a signal probe by incubating the assay with a detection VP antibody (dAb) conjugated gold nanoparticles (AuNPs)-labeled graphite-like carbon nitride (g-C3N4). Finally, the attached signal probe could harvest a visible signal by the silver meal deposition, and then followed by homebrew Matlab 6.0 as a grey value acquisition. In addition, the overall design of the biosensor was established in abundant AuNPs and g-C3N4 with a two-dimensional structure, affording a bulb-decorated Christmas-tree model. Moreover, with the optimized conditions, the detection limit of the as-proposed biosensor is as low as 102 CFU (Colony-Forming Units) mL−1, exhibiting an increase of two orders of magnitude compared with the traditional immune-gold method. Additionally, the developed visible immunosensor was also successfully applied to the analysis of complicated samples.
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Acknowledgments
Financial support from the National Natural Science Foundation of China (41576098, 81273130, and 511601370), the Science and Technology Department of Zhejiang Province of China (2016C33176, 2016R405068), the Natural Sciences Foundation of Guangdong Province of China (2014A030313590) and Shenzhen Science and Technology Bureau (JCYJ20140508155916417) are gratefully acknowledged. This work is also sponsored by K. C. Wong Magna Fund in Ningbo University.
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Song, X., Wu, Y., Wu, L. et al. Christmas-tree Derived Amplification Immuno-Strategy for Sensitive Visual Detection of Vibrio parahaemolyticus Based on Gold Label Silver Stain Technology. ANAL. SCI. 33, 889–895 (2017). https://doi.org/10.2116/analsci.33.889
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DOI: https://doi.org/10.2116/analsci.33.889