Influence of surface roughness on the initial formation of biofilm

Ammar, Yasmine; Swailes, David; Bridgens, Ben; Chen, Jinju

doi:10.1016/j.surfcoat.2015.07.062

Cited by 118 publications

(75 citation statements)

References 17 publications

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“…According to morphology surface observations done by SEM in Figure 3.a and 3.b, it is possible to observe the differences in the surface between LDPE with and without thermal treatment; after the modification, a micro roughness was achieved in m-LDPE (3.b), it favors the growth and development of biofilm observed in 3.c. This finding is corroborated by Ammar and Oh [13,14], who noted a better biofilm adherence in roughness surface than smooth surfaces. Also, the observations in the other materials 3(d) and 3(f) PET and HDPE respectively without biofilm, and 3(e) and 3(g) with biofilm, show that there is not too much biofilm formation.…”

Section: Biomass Growingsupporting

confidence: 76%

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Support materials of fixed biofilm based on solid plastic wastes for domestic wastewater treatment

Espinoza

Fernandez

Pérez

et al. 2019

Rev. Téc. Ing. Univ. Zulia.

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Section: Biomass Growingsupporting

confidence: 76%

“…It could be thermally modified to get a heavier material as well as to improve the surface characteristics. The treatment favor the attachment and remaining of biofilm on the materials [10,13,14]. The thermal treatment consisted in maintaining the LDPE to exactly 105 °C for 15 minutes in a stove.…”

Section: Modification Of Ldpementioning

confidence: 99%

Support materials of fixed biofilm based on solid plastic wastes for domestic wastewater treatment

Espinoza

Fernandez

Pérez

et al. 2019

Rev. Téc. Ing. Univ. Zulia.

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“…While it is well known that biofilms are more virulent than planktonic cells, there are evidences of convergence between electroactivity and virulence, which open novel possibility in biofilm control and biomedical applications . Surface structure determine initial biofilm attachment, in which biofilm formation is enhanced by nano‐ and micro‐ roughness modifications. However, large microstructures increase diffusional limitations for the transport of nutrient and redox mediator from bulk solution in the biofilms, thus the cell attachment and EET rate does not correlate linearly with the microstructure .…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Signature of Escherichia coli on Nickel Micropillar Array Electrode for Early Biofilm Characterization

Astorga

Marsili

et al. 2019

ChemElectroChem

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Biofilms are sessile microbial communities living at interfaces, in which the extracellular matrix is responsible for the mechanical stability and adhesion to surfaces. Transition from planktonic to attached cells is a key step in the biofilm formation process. Monitoring of this transition is needed to prevent contamination of biomedical devices and mitigate microbially influenced corrosion. Under anoxic local conditions and in the presence of an exogenous redox mediator, biofilms can divert part of the electron flow associated with catabolism to electrodes maintained at a defined potential. Extracellular electron transfer (EET) follows upon the attachment of planktonic cells to the surface. Modification of the electrode increases bacterial attachment, thus allowing early bioelectrochemical detection of the biofilm. Here, we report a Ni electrode micropillar array to detect early attachment of Escherichia coli biofilm through mediated EET in potentiostat‐controlled electrochemical cells. The biofilm‐surface interaction is studied by using electrochemical impedance spectroscopy (EIS) at different potentials and temperatures over 24 h. The analysis of the EIS signature highlights the effect of temperature on mediated EET in biofilms. These results demonstrate that micropillared electrodes allow earlier biofilm detection than flat electrodes, which is relevant to biofilm sensing and investigation of microbially influenced corrosion in drinking water systems and biomedical devices.

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“…In this study, we have assumed that the films are abiotic. However, the surface roughness of microaggregates can be expected to provide an ideal niche for microbiological colonization by facilitating cell attachment and protecting against shear stresses imposed during drainage (Ammar et al, 2015). Rough elements extending from the surface of the aggregates mimic mountain‐valley topography.…”

Section: Resultsmentioning

confidence: 99%

Sandy Soil Microaggregates: Rethinking Our Understanding of Hydraulic Function

Paradiś

Brueck

Meisenheimer

et al. 2017

Vadose Zone Journal

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Core Ideas Sandy soil microaggregates are comprised of a solid sand core encrusted with fines. Thick films control a significant proportion of water retention in coarse sandy soil. Three water pools drain sequentially: capillary water, thick films, and adsorptive films. Film seepage rates should be considered when irrigating sandy soil. This study investigated the peculiar structure of microaggregates in coarse sandy soils that exhibit only external porosity and investigated their control on soil hydrology. The microstructure underpins a hydrologic existence that differs from finer textured soils where aggregates have internal porosity. Understanding the impact of these microaggregates on soil hydrology will permit improved agricultural irrigation management and estimates associated with ecosystem capacity and resiliency. Microstructure was investigated using a digital microscope, and aspects of the structure were quantified by sedimentation and computed microtomography. Sandy soil microaggregates were observed to be comprised of a solid sand‐grain core that is coated with fines, presumably cemented by organic media. This microstructure leads to three distinct water pools during drainage: capillary water, followed by thick films (1–20 μm) enveloping the outer surfaces of the crusted microaggregates, followed by adsorbed thin films (<1 μm). The characteristics of the thick films were investigated using an analytical model. These films may provide as much as 10 to 40% saturation in the range of plant‐available water. Using lubrication theory, it was predicted that thick film drainage follows a power law function with an exponent of 2. Thick films may also have a role in the geochemical evolution of soils and in ecosystem function because they provide contiguous water and gas phases at relatively high moisture contents. And, because the rough outer crust of these microaggregates can provide good niches for microbial activity, biofilm physics will dominate thick film processes, and consequently hydrologic, biologic, and geochemical functions for coarse sandy soils.

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Influence of surface roughness on the initial formation of biofilm

Abstract: This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International licence Newcastle University ePrints -eprint.ncl.ac.uk

Cited by 118 publications

References 17 publications

Support materials of fixed biofilm based on solid plastic wastes for domestic wastewater treatment

Support materials of fixed biofilm based on solid plastic wastes for domestic wastewater treatment

Electrochemical Signature of Escherichia coli on Nickel Micropillar Array Electrode for Early Biofilm Characterization

Sandy Soil Microaggregates: Rethinking Our Understanding of Hydraulic Function

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