Work

Single‐Walled Carbon Nanotubes as Fluorescence Biosensors for Pathogen Recognition in Water Systems

Year: 2008

Type: article

Abstract: The possibility of using single‐walled carbon nanotubes (SWCNTs) aggregates as fluorescence sensors for pathogen recognition in drinking water treatment applications has been studied. Batch adsorption study is conducted to adsorb large concentrations of Staphylococcus aureus aureus SH 1000 and Escherichia coli pKV‐11 on single‐walled carbon nanotubes. Subsequently the immobilized bacteria are detected with confocal microscopy by coating the nanotubes with fluorescence emitting antibodies. The Freundlich adsorption equilibrium constant (k) for S.aureus and E.coli determined from batch adsorption study was found to be 9 × 108 and 2 × 108 ml/g, respectively. The visualization of bacterial cells adsorbed on fluorescently modified carbon nanotubes is also clearly seen. The results indicate that hydrophobic single‐walled carbon nanotubes have excellent bacterial adsorption capacity and fluorescent detection capability. This is an important advancement in designing fluorescence biosensors for pathogen recognition in water systems.

Source: Journal of Nanotechnology

DOI: 10.1155/2008/156358

Authors: Venkata K. K. Upadhyayula, Soumitra Ghoshroy, Vinod S. Nair, Geoffrey B. Smith, Martha C. Mitchell, Shuguang Deng

Institutions: New Mexico State University, United States Air Force Research Laboratory, University of South Carolina, Rocky Mountain Laboratories

Language: English

Topic: Graphene and Nanomaterials Applications

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Clean water and sanitation, Good health and well-being

Open Access status: hybrid

Estimated APC paid: $1,000