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Related Experiment Video

Updated: Mar 22, 2026

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Thin bacteria/Layered Double Hydroxide films using a layer-by-layer approach.

Matilte Halma1, Aicha Khenifi2, Martine Sancelme1

  • 1Université Clermont Auvergne, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, F-63000 Clermont-Ferrand, France; CNRS, UMR 6296, ICCF, F-63178 Aubiere, France.

Journal of Colloid and Interface Science
|April 29, 2016
PubMed
Summary

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Researchers designed thin films by alternating bacteria (Pseudomonas sp. strain ADP) and Layered Double Hydroxide (LDH) nanosheets. These films show immobilized bacteria maintain metabolic activity, indicating potential for biosensor applications.

Area of Science:

  • Materials Science
  • Biotechnology
  • Electrochemistry

Background:

  • Layered Double Hydroxides (LDH) are versatile materials with applications in various fields.
  • Immobilizing bacterial cells within materials can enhance their stability and functionality for biosensing.

Purpose of the Study:

  • To design and characterize thin films composed of bacteria (Pseudomonas sp. strain ADP) and Mg2Al-NO3 LDH nanosheets.
  • To evaluate the metabolic activity of bacteria immobilized within the {ADP/LDH}n films.

Main Methods:

  • Layer-by-layer deposition was employed to assemble bacteria and LDH nanosheets.
  • UV-Vis spectroscopy monitored the film assembly process.
  • X-ray diffraction, infrared spectroscopy, scanning electron microscopy, and atomic force microscopy characterized the film structure.
Keywords:
BacteriaBioelectrodeLayer-by-layerLayered Double HydroxidesThin film

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  • Chronoamperometry measured the metabolic activity of immobilized bacteria in the presence of glucose.

    • Main Results:

    • UV-Vis spectroscopy confirmed a progressive increase in immobilized bacteria with deposition cycles.
    • Characterization techniques verified the successful formation of the {ADP/LDH}n film structure.
    • Immobilized bacteria demonstrated sustained metabolic activity, evidenced by a steady current response upon glucose addition.

    Conclusions:

    • Thin {ADP/LDH}n films can be successfully fabricated using a layer-by-layer approach.
    • The immobilized bacteria retain their metabolic functions, suggesting the potential of these films for biosensing applications.