Quantum Dots for Detection of Harmful Waterborne Bacterial Pathogens

Sonal Mazumder

ISBN 10: 3847326902 / ISBN 13: 9783847326908

Published by LAP Lambert Academic Publishing Jan 2013, 2013

About this Item

Neuware -Harmful bacteria are the most common cause of food- and waterborne illnesses. Infection often leads to bloody diarrhoea, and occasionally to kidney failure. Several strains of the bacteria Escherichia coli produce a powerful toxin which causes serious illness. Food and water can be contaminated with other bacteria like Salmonella, Coliform, Pseudomonas, etc. Hence, it has become important to rapidly detect and identify infectious bacteria. Colloidal luminescent semiconductor nanocrystals or quantum dots (QDs) have elicited a great deal of interest in the biosensing community due to their unique fluorescent properties. Here ZnS¿:¿Mn2+ QDs are synthesised and biofunctionalised with chitosan. They are attached to the anionic cell wall of E. coli bacteria and different properties of this compound system are studied. These nanocrystals may offer cost effective and quicker alternative to detect single bacterium compared to other conventional methods. Several characterization methods are discussed. The particle size calculated is approximately 8-10¿nm. The blue shift of PL peak has been observed after the bacteria get attached.Books on Demand GmbH, Überseering 33, 22297 Hamburg 76 pp. Englisch.

Seller Inventory # 9783847326908

Bibliographic Details

• Title: Quantum Dots for Detection of Harmful Waterborne Bacterial Pathogens
• Publisher: LAP Lambert Academic Publishing Jan 2013
• Publication Date: 2013
• Language: English
• ISBN 10: 3847326902
• ISBN 13: 9783847326908
• Binding: Taschenbuch
• Condition: Neu
• Dimensions: 220W x 150H x 6D millimeters 220 millimeters width by 150 millimeters height by 6 millimeters depth
• Weight: 131 grams

About this title

Synopsis

Harmful bacteria are the most common cause of food- and waterborne illnesses. Infection often leads to bloody diarrhoea, and occasionally to kidney failure. Several strains of the bacteria Escherichia coli produce a powerful toxin which causes serious illness. Food and water can be contaminated with other bacteria like Salmonella, Coliform, Pseudomonas, etc. Hence, it has become important to rapidly detect and identify infectious bacteria. Colloidal luminescent semiconductor nanocrystals or quantum dots (QDs) have elicited a great deal of interest in the biosensing community due to their unique fluorescent properties. Here ZnS : Mn2+ QDs are synthesised and biofunctionalised with chitosan. They are attached to the anionic cell wall of E. coli bacteria and different properties of this compound system are studied. These nanocrystals may offer cost effective and quicker alternative to detect single bacterium compared to other conventional methods. Several characterization methods are discussed. The particle size calculated is approximately 8-10 nm. The blue shift of PL peak has been observed after the bacteria get attached.

About the Author

Sonal Mazumder is a Research Assistant in Virginia Polytechnic Institute and State University from Blacksburg, Virginia, United States. She did her Chemical Engineering from Heritage Institute of Technology, Kolkata, India and then received a M.Tech in Nanoscience and Technology from Jadavpur University, Kolkata.