Real-Time Detection of Bacterial Contamination in Dynamic Aqueous Environments Using Optical Sensors
- 20 January 2004
- journal article
- research article
- Published by American Chemical Society (ACS) in Analytical Chemistry
- Vol. 76 (5), 1411-1418
- https://doi.org/10.1021/ac034914q
Abstract
Here we describe on-line, real-time detection of waterborne bacteria using an optical sensor based on a starburst dendrimer film containing a lipophilic fluorophore. The sensor is constructed via covalent coupling between amine-terminated polyamidoamine dendrimer and silanized glass through an amide bond. The reporter molecule is embedded in the dendrimer layer through host−guest interaction. Real-time automated detection and quantitation of the bacteria are realized by using a charge-coupled detector camera and customized imaging and analysis software. The sensor responds to bacteria introduced to an aqueous flow system within 1 min. The limit of detection is ∼104cells/mL. The operational lifetime is more than 64 h, and the storage lifetime of the sensor is at least 7 months.Keywords
This publication has 9 references indexed in Scilit:
- Optimisation of dendrimer‐mediated gene transfer by anionic oligomersThe Journal of Gene Medicine, 2002
- Bioimprinting of Polymers and Sol−Gel Phases. Selective Detection of Yeasts with Imprinted PolymersAnalytical Chemistry, 2002
- Selective Microorganism Detection with Cell Surface Imprinted PolymersAdvanced Materials, 2001
- Dendrimer-Activated Solid Supports for Nucleic Acid and Protein MicroarraysChemBioChem, 2001
- Sensors for detection of calcium associated with bacterial endospore suspensionsAnalytica Chimica Acta, 2001
- PCR Detection of Bacteria in Seven MinutesScience, 1999
- Dendrimers in Supramolecular Chemistry: From Molecular Recognition to Self-AssemblyChemical Reviews, 1997
- In situ visualization of high genetic diversity in a natural microbial communityJournal of Bacteriology, 1996
- Piezoelectric immuno sensor for the detection of candida albicans microbesAnalytica Chimica Acta, 1986