Abstract
Gold nanobipyramids (NBPs) have attracted attention for producing smart sensing devices as diagnostic tools in biotechnological and medical applications, because they show more advantageous plasmonic properties than comparable gold nanorods. Normally, NBPs were synthesized using seed-mediated growth process at room temperature. In this report, our group describes a method for synthesising of NBPs using microwave irradiation with ascorbic acid reduction and cetyltrimethylammonium bromide + silver nitrate (AgNO3) as capping agents. The advantages of this method are a highly effective approach to fast and uniform NBPs. The product was characterized by ultraviolet–visible spectroscopy, Fourier transform infrared spectroscopy, transmission electron microscopy, and x-ray powder diffraction. As an application in quartz crystal microbalance immunosensors, NBPs is conjugated with the chloramphenicol antibodies for signal amplification to detect chloramphenicol residuals in the QCM system.
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Acknowledgements
This research is funded by the Vietnam National Foundation for Science and Technology Development (NAFOSTED) under Grant Number 104.04-2011.28. In addition, this work was financially supported by the Ministry of Science and Technology of Vietnam (MOST), Project Number: 40/2014/HĐ-NĐT.
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Huynh, T.P., Ngo, V.K.T., Nguyen, D.G. et al. A Novel Method for Preparation of Gold NanoBipyramids Using Microwave Irradiation and Its Application in Immunosensors. J. Electron. Mater. 45, 2516–2521 (2016). https://doi.org/10.1007/s11664-016-4398-4
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DOI: https://doi.org/10.1007/s11664-016-4398-4