Interaction between laser radiation and biofouling for ship hull cleaning

Zimbelmann, Stanislav; Emde, Benjamin; Waldegge, Tim Heusinger von; Stübing, Dorothea; Baumann, Markus; Hermsdorf, Jörg

doi:10.1016/j.procir.2022.08.013

Cited by 9 publications

(4 citation statements)

References 16 publications

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“…The transcriptome of the non-pigmented E. coli suggested DNA damage and ROS formation as major detrimental causes of the blue light treatment. Moreover, in previous experiments of the authors of the present publication, a bleaching of the naturally green marine biofilm after laser treatment was observed [36]. Obviously, in both cases, bacteria and algae, pigment damage might contribute to the observed killing effect.…”

Section: Transmission Spectra Of High-power Blue Laser Radiation Trea...supporting

confidence: 60%

“…Thus, high-intensity blue laser radiation might provide an alternative strong tool for in situ biofouling removal from ship hulls and other aquatic technological surfaces. The first experiments with blue laser-treated marine biofilm-overgrown metal surfaces by the authors of the present publication revealed biofilm bleaching and final removal by the drag of the current [36]. A general sterilizing effect of the blue laser radiation on seawater was observed [37].…”

Section: Introductionmentioning

confidence: 55%

“…Consequently, the algicidal effect of high-intensity blue laser radiation was examined here. In previous experiments, the authors of the present publication showed the successful treatment of surface-attached natural marine biofilms partly composed of various microalgae with blue laser radiation [36]. In order to investigate the principal accessibility and underlying cellular processes of eukaryotic microalgae to this treatment, we used single algal species grown in liquid cultures.…”

Section: Algicidal Effect Of Blue Laser Treatmentmentioning

confidence: 96%

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Antibiotic Effect of High-Power Blue Laser Radiation

Hintmann,

Zimbelmann,

Emde

et al. 2024

Photonics

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The development of sustainable alternatives to chemical and mechanical biofilm removal for submerged technical devices used in freshwater and marine environments represents a major technical challenge. In this context, the antibiotic impact of blue light with its low absorption underwater provides a potentially useful alternative. However, former technical limitations led to hours of treatment. Here, we applied high-power blue laser irradiation (1500 W) with a wavelength of 448 nm to demonstrate its strong antibiotic and algicidal effect on different bacteria and algae in seconds. High-power blue light treatment (139 W/cm2) for only 8.9 s led to the efficient deactivation of all tested organisms. Analyses of the underlying biological mechanisms revealed the absorption of the blue light by endogenous chromophores (flavins, tetrapyrroles) with the generation of reactive oxygen species (ROS). In agreement, Escherichia coli transcriptome analyses demonstrated a stress response at the level of DNA damage repair, respiration, and protein biosynthesis. Spectroscopic measurements of the irradiated algae indicated the irreversible damage of chlorophyll by photooxidation with the formation of singlet oxygen. In conclusion, high-power blue laser radiation provides a strong sustainable tool for the removal of biofouling in a very short time for applications in aquatic systems.

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Section: Transmission Spectra Of High-power Blue Laser Radiation Trea...supporting

confidence: 60%

Section: Introductionmentioning

confidence: 55%

Section: Algicidal Effect Of Blue Laser Treatmentmentioning

confidence: 96%

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Antibiotic Effect of High-Power Blue Laser Radiation

Hintmann,

Zimbelmann,

Emde

et al. 2024

Photonics

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“…New technologies have been presented in the recent literature to reduce the impact of biofilm, as also ways of controlling its presence on the surface of sensors. Different active techniques based on ultraviolet [ 18 , 19 , 20 ], laser [ 21 , 22 ], direct electrification [ 23 , 24 ], bubbles [ 25 ], or acoustics [ 26 , 27 , 28 ] were demonstrated to be effective but presented high energetic requirements for continuous and long-term monitoring.…”

Section: Introductionmentioning

confidence: 99%

Design and In Situ Validation of Low-Cost and Easy to Apply Anti-Biofouling Techniques for Oceanographic Continuous Monitoring with Optical Instruments

Matos

Pinto

Sousa

et al. 2023

Sensors

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Biofouling is the major factor that limits long-term monitoring studies with automated optical instruments. Protection of the sensing areas, surfaces, and structural housing of the sensors must be considered to deliver reliable data without the need for cleaning or maintenance. In this work, we present the design and field validation of different techniques for biofouling protection based on different housing materials, biocides, and transparent coatings. Six optical turbidity probes were built using polylactic acid (PLA), acrylonitrile butadiene styrene (ABS), PLA with copper filament, ABS coated with PDMS, ABS coated with epoxy and ABS assembled with a system for in situ chlorine production. The probes were deployed in the sea for 48 days and their anti-biofouling efficiency was evaluated using the results of the field experiment, visual inspections, and calibration signal loss after the tests. The PLA and ABS were used as samplers without fouling protection. The probe with chlorine production outperformed the other techniques, providing reliable data during the in situ experiment. The copper probe had lower performance but still retarded the biological growth. The techniques based on transparent coatings, epoxy, and PDMS did not prevent biofilm formation and suffered mostly from micro-biofouling.

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High‐Resolution Spectroscopy of Blue High‐Power Laser Diodes with a Fabry–Pérot Interferometer

Kunzmann,

Kohlstedt,

Uhlig

et al. 2024

Physica Status Solidi (a)

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In this work, it is aimed to study the interplay of different longitudinal mode combs corresponding to higher‐order lateral modes of broad‐area Fabry–Pérot‐type laser diodes. Coherent coupling of longitudinal modes of different mode combs influences the near‐ and far‐field pattern of the diode. Herein, commercial state‐of‐the‐art high‐power laser diodes based on the (Al,In)GaN material system in the blue spectral range with a 40 μm broad ridge are investigated. To spectrally resolve the different lateral modes, a sequential combination of a high‐resolution double grating spectrometer and a Fabry–Pérot interferometer (FPI) is used. The grating spectrometer acts as bandpass with a spectral width smaller than the free spectral range (FSR) of the FPI. The FPI with a finesse of approximately boosts the resolution to 0.08 pm. A spectral clustering of lateral modes with increasing current and also a variation of the number of distinguishable lateral modes between 7 and 11 are observed. Within the current range from 1.25Ith to 2.25Ith, there is no clear evidence for coherent coupling. It is concluded that mode‐pulling is not strong enough to coherently couple modes on the investigated time and wavelength range.

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Interaction between laser radiation and biofouling for ship hull cleaning

Cited by 9 publications

References 16 publications

Antibiotic Effect of High-Power Blue Laser Radiation

Antibiotic Effect of High-Power Blue Laser Radiation

Design and In Situ Validation of Low-Cost and Easy to Apply Anti-Biofouling Techniques for Oceanographic Continuous Monitoring with Optical Instruments

High‐Resolution Spectroscopy of Blue High‐Power Laser Diodes with a Fabry–Pérot Interferometer

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