Modeling and analysis of nanoscale interaction forces between Acidithiobacillus ferrooxidans and AFM tip

The specificity exhibited by Acidithiobacillus ferrooxidans, a chemolithoautotrophic acidophile, in their attachment to different sulphide minerals has resulted in effective physical separation of these minerals. This can be explained in terms of surface forces of interaction between the cells and s...

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Bibliographic Details
Published in:Colloids and surfaces, B, Biointerfaces B, Biointerfaces, 2010, Vol.75 (1), p.310-318
Main Authors: Chandraprabha, M.N., Somasundaran, P., Natarajan, K.A.
Format: Article
Language:English
Subjects:
Acidithiobacillus - cytology
Acidithiobacillus - metabolism
Acidithiobacillus ferrooxidans
AFM
Atomic force microscopy
Attachment
Biomechanical Phenomena
Electrophoresis
Hydrogen-Ion Concentration
Interfacial forces
Lipopolysaccharides - isolation & purification
Microscopy, Atomic Force
Minerals
Modeling
Models, Biological
Nanocomposites
Nanomaterials
Nanostructure
Nanotechnology
Osmolar Concentration
Polymers - chemistry
Silicon Compounds - chemistry
Silicon nitride
Sulfides
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Summary:The specificity exhibited by Acidithiobacillus ferrooxidans, a chemolithoautotrophic acidophile, in their attachment to different sulphide minerals has resulted in effective physical separation of these minerals. This can be explained in terms of surface forces of interaction between the cells and substrates using AFM. In the light of this, the present study reports interaction studies with A. ferrooxidans cells and an AFM silicon nitride tip. The aim of the present investigation is to probe the nanoscale interactions between A. ferrooxidans cells and silicon nitride tip of an AFM, model the approach and retraction forces, and elucidate the effects of pH, ionic strength and surface biopolymers on interfacial forces.
ISSN:0927-7765
1873-4367
DOI:10.1016/j.colsurfb.2009.09.002