Force measurements of bacterial adhesion on metals by a cell probe atomic force microscope (CAT#: STEM-SMMT-0010-LJX)

Introduction

The adhesion of microbial cells to metal surfaces in aqueous media is an important phenomenon in both the natural environment and engineering systems. The adhesion of two anaerobic sulfate-reducing bacteria (Desulfovibrio desulfuricans and a local marine isolate) and an aerobe (Pseudomonas sp.) to four polished metal surfaces (i.e., stainless steel 316, mild steel, aluminum, and copper) was examined using a force spectroscopy technique with an atomic force microscope (AFM). Using a modified bacterial tip, the attraction and repulsion forces (in the nano-Newton range) between the bacterial cell and the metal surface in aqueous media were quantified.

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Principle Applications Procedure Materials Notes Related Products

Principle

Atomic force microscope (AFM) is a new type of surface analysis instrument based on the principles of physics and imaging through the interaction of scanning probe and sample surface atoms. It belongs to the third generation of microscopes after optical microscopes and electron microscopes.
AFM usually uses a sharp probe to scan the sample, which is fixed on a microcantilever that is extremely sensitive to the surface force between the probe and the sample. The deflection of the cantilever under force can cause the laser beam emitted by the laser source to shift after being reflected by the cantilever. The detector receives reflected light, and finally receives signals that are collected, processed, and formed into surface morphology images of the sample through a computer system.

Applications

Imaging of micro and nanoscale features on the surface of the sample
Suitable for research in fields such as materials science, biology, and chemistry

Procedure

1. Sampling
2. Preparation of slices
3. Staining (Select according to the specific experimental situation)
4. Observation

Materials

• Sample Type:
Bacterial cells

Notes

Operate in strict accordance with the operating procedures, and shall not arbitrarily change the operating procedures

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