Publikation:

Hydrodynamics of nanomachines in biology

Lade...
Vorschaubild

Dateien

Gauger.pdf
Gauger.pdfGröße: 1.58 MBDownloads: 280

Datum

2005

Autor:innen

Gauger, Erik

Herausgeber:innen

Kontakt

ISSN der Zeitschrift

Electronic ISSN

ISBN

Bibliografische Daten

Verlag

Schriftenreihe

Auflagebezeichnung

DOI (zitierfähiger Link)
ArXiv-ID

Internationale Patentnummer

Angaben zur Forschungsförderung

Projekt

Open Access-Veröffentlichung
Open Access Green
Core Facility der Universität Konstanz

Gesperrt bis

Titel in einer weiteren Sprache

Publikationstyp
Masterarbeit/Diplomarbeit
Publikationsstatus
Published

Erschienen in

Zusammenfassung

In the hydrodynamic environment of biological microorganisms inertia is irrelevant and all motion is dominated by friction. As a consequence, concepts like hydrodynamic interactions and the need for non-reciprocal motion for generating propulsion become important. These effects are mostly unknown on the human scale and require a different approach towards the problem how a micro-swimmer achieves locomotion. The present works aims to shed some light on the relevance of the hydrodynamic environment that caused the evolution of the marvelously designed swimming apparatuses employed by many bacteria, such as E. coli, paramecium and also spermatozoa. To achieve this task, computer simulutions are performed based on a model filament which resembles inherently active biological filaments but is much simpler and experimentally realisable at the same time. Therefore, a numerical model of the superparamagnetic filament used by Dreyfus et al. for building the first man-made micro-swimmer (Nature 437, 2005) is adapted. Motived by this success, the one-armed swimmer of Dreyfus et al. consisting of a viscous load attached to a biomimetic flagellar tail is studied. Besides an excellent agreement between experimental and simulation data, the latter lead to a profound and comprehensive understanding of the dynamics and suitable operating modes of such a system. Furthermore, a second system with a model cilium attached to a wall is investigated. The dynamics of this system is heavily influenced by the complicated effects of hydrody- namic interactions close to a bounding wall, which are considered to a good approximation in our simulations. We study two ways of generating an asymmetric beating cycle with a magnetic actuation technique. Both are successful in that they show that surrounding fluid is indeed transported along the wall by the beating of the model cilium.

Zusammenfassung in einer weiteren Sprache

Fachgebiet (DDC)
530 Physik

Schlagwörter

Ziliendynamik, Magnetfilament, biomimetics, ciliary beating, swimming at low reynolds number, one-armed swimmer, locomotion

Konferenz

Rezension
undefined / . - undefined, undefined

Forschungsvorhaben

Organisationseinheiten

Zeitschriftenheft

Zugehörige Datensätze in KOPS

Zitieren

ISO 690GAUGER, Erik, 2005. Hydrodynamics of nanomachines in biology [Master thesis]
BibTex
@mastersthesis{Gauger2005Hydro-5285,
  year={2005},
  title={Hydrodynamics of nanomachines in biology},
  author={Gauger, Erik}
}
RDF
<rdf:RDF
    xmlns:dcterms="http://purl.org/dc/terms/"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:bibo="http://purl.org/ontology/bibo/"
    xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#"
    xmlns:foaf="http://xmlns.com/foaf/0.1/"
    xmlns:void="http://rdfs.org/ns/void#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > 
  <rdf:Description rdf:about="https://kops.uni-konstanz.de/server/rdf/resource/123456789/5285">
    <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/5285/1/Gauger.pdf"/>
    <dc:creator>Gauger, Erik</dc:creator>
    <dcterms:issued>2005</dcterms:issued>
    <dcterms:abstract xml:lang="eng">In the hydrodynamic environment of biological microorganisms inertia is irrelevant and all motion is dominated by friction. As a consequence, concepts like hydrodynamic interactions and the need for non-reciprocal motion for generating propulsion become important. These effects are mostly unknown on the human scale and require a different approach towards the problem how a micro-swimmer achieves locomotion. The present works aims to shed some light on the relevance of the hydrodynamic environment that caused the evolution of the marvelously designed swimming apparatuses employed by many bacteria, such as E. coli, paramecium and also spermatozoa. To achieve this task, computer simulutions are performed based on a model filament which resembles inherently active biological filaments but is much simpler and experimentally realisable at the same time. Therefore, a numerical model of the superparamagnetic filament used by Dreyfus et al. for building the first man-made micro-swimmer (Nature 437, 2005) is adapted. Motived by this success, the  one-armed swimmer  of Dreyfus et al. consisting of a viscous load attached to a biomimetic flagellar tail is studied. Besides an excellent agreement between experimental and simulation data, the latter lead to a profound and comprehensive understanding of the dynamics and suitable operating modes of such a system. Furthermore, a second system with a model cilium attached to a wall is investigated. The dynamics of this system is heavily influenced by the complicated effects of hydrody- namic interactions close to a bounding wall, which are considered to a good approximation in our simulations. We study two ways of generating an asymmetric beating cycle with a magnetic actuation technique. Both are successful in that they show that surrounding fluid is indeed transported along the wall by the beating of the model cilium.</dcterms:abstract>
    <dcterms:rights rdf:resource="https://rightsstatements.org/page/InC/1.0/"/>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T14:54:37Z</dcterms:available>
    <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/5285/1/Gauger.pdf"/>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/5285"/>
    <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
    <dc:language>eng</dc:language>
    <dc:format>application/pdf</dc:format>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T14:54:37Z</dc:date>
    <dc:rights>terms-of-use</dc:rights>
    <foaf:homepage rdf:resource="http://localhost:8080/"/>
    <dc:contributor>Gauger, Erik</dc:contributor>
    <dcterms:title>Hydrodynamics of nanomachines in biology</dcterms:title>
  </rdf:Description>
</rdf:RDF>

Interner Vermerk

xmlui.Submission.submit.DescribeStep.inputForms.label.kops_note_fromSubmitter

Kontakt
URL der Originalveröffentl.

Prüfdatum der URL

Prüfungsdatum der Dissertation

Finanzierungsart

Kommentar zur Publikation

Allianzlizenz
Corresponding Authors der Uni Konstanz vorhanden
Internationale Co-Autor:innen
Universitätsbibliographie
Begutachtet
Diese Publikation teilen