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Reference type: Book Chapter
Authors: Afzal A, Chen X, Jenik M, Krassnig S, Dickert FL
Publication date: 2008
Chapter title: Detection of cells and viruses with mass sensitive devices - application of synthetic antibodies.
Page numbers: 60-76.
Alternative URL: http://www.booksonline.iospress.nl/Content/View.aspx?piid=9582

Book title: Commercial and Pre-Commercial Cell Detection Technologies for Defence against Bioterror: Technology, Market and Society
Editors: Lechuga LM, Milanovich FP, Skládal P, Ignatov O, Austin TR
Publisher: IOS Press
City: Amsterdam
ISBN: 978-1-58603-858-8
Series title: NATO Science for Peace and Security Series E: Human and Societal Dynamics
Volume number: 39

Abstract: The label-free, selective and sensitive detection of cells and viruses was successfully performed down to the nanogram and picogram range with acoustic transducers such as the quartz crystal microbalance and the surface acoustic wave resonators. Selectivity of these acoustic devices was optimized by combining them with sensitive layers exhibiting pronounced molecular recognition capabilities based on size, shape and preferably hydrogen bonding. Sensitive layers, often termed as synthetic antibodies, were generated by an innovative method of surface imprinting with bio-analytes. Atomic force microscopy (AFM) proved an excellent tool to examine the bio-imprinted polymer surfaces. Bio-imprinted layers, capable of reversibly absorbing the imprint species, opened up the possibilities to detect different types of cells, for instance, yeast and bacteria. Viruses such as the tobacco mosaic virus, the pox and the human rhinovirus, were specifically detected down to a few ng/mL. Furthermore, by imprinting with bio-analytes, the cross sensitivities can almost be neglected and distinguishing different biogeneous species becomes feasible. The synthetic antibodies yield a more characteristic response pattern than the natural ones.
Template and target information: viruses, yeast, bacteria, tobacco mosaic visus, pox, human rhinovirus
Author keywords: mass-sensitive devices, acoustic sensors, QCM, SAW, synthetic antibodies, surface imprinting, bio-analytes

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