Repository logo
 
Publication

Sensing surface morphology of biofibers by decorating spider silk and cellulosic filaments with nematic microdroplets

2016-02Journal article Restricted access
Simple item page
dc.contributor.authorAguirre, Luis E.
dc.contributor.authorde Oliveira, Alexandre
dc.contributor.authorSec, David
dc.contributor.authorCopar, Simon
dc.contributor.authorAlmeida, Pedro L.
dc.contributor.authorRavnik, Miha
dc.contributor.authorGodinho, Maria Helena
dc.contributor.authorZumer, Slobodan
dc.date.accessioned2017-07-19T11:25:26Z
dc.date.available2017-07-19T11:25:26Z
dc.date.issued2016-02
dc.description.abstractProbing the surface morphology of microthin fibers such as naturally occurring biofibers is essential for understanding their structural properties, biological function, and mechanical performance. The state-of-the-art methods for studying the surfaces of biofibers are atomic force microscopy imaging and scanning electron microscopy, which well characterize surface geometry of the fibers but provide little information on the local interaction potential of the fibers with the surrounding material. In contrast, complex nematic fluids respond very well to external fields and change their optical properties upon such stimuli. Here we demonstrate that liquid crystal droplets deposited on microthin biofibers-including spider silk and cellulosic fibers-reveal characteristics of the fibers' surface, performing as simple but sensitive surface sensors. By combining experiments and numerical modeling, different types of fibers are identified through the fiber-to-nematic droplet interactions, including perpendicular and axial or helicoidal planar molecular alignment. Spider silks align nematic molecules parallel to fibers or perpendicular to them, whereas cellulose aligns the molecules unidirectionally or helicoidally along the fibers, indicating notably different surface interactions. The nematic droplets as sensors thus directly reveal chirality of cellulosic fibers. Different fiber entanglements can be identified by depositing droplets exactly at the fiber crossings. More generally, the presented method can be used as a simple but powerful approach for probing the surface properties of small-size bioobjects, opening a route to their precise characterizationpt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationAGUIRRE, Luís E.; [et al] – Sensing surface morphology of biofibers by decorating spider silk and cellulosic filaments with nematic microdroplets. Proceedings of the National Academy of Sciences of the United States of America. ISSN 0027-8424. Vol. 113, N.º 5 (2016), pp. 1174-1179
dc.identifier.doi10.1073/pnas.1518739113pt_PT
dc.identifier.issn0027-8424
dc.identifier.urihttp://hdl.handle.net/10400.21/7277
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.relation.publisherversion: http://www.pnas.org/content/113/5/1174.full.pdfpt_PT
dc.subjectCellulosept_PT
dc.subjectnematic dropletspt_PT
dc.subjectSensorpt_PT
dc.subjectSpider silkpt_PT
dc.titleSensing surface morphology of biofibers by decorating spider silk and cellulosic filaments with nematic microdropletspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1179pt_PT
oaire.citation.issue5pt_PT
oaire.citation.startPage1174pt_PT
oaire.citation.titleProceedings of the National Adademy of Sciences of the United States of Americapt_PT
oaire.citation.volume113pt_PT
person.familyNameAguirre
person.familyNameSec
person.familyNameMarques de Almeida
person.familyNameRavnik
person.familyNameGodinho
person.familyNameZumer
person.givenNameLuis E.
person.givenNameDavid
person.givenNamePedro
person.givenNameMiha
person.givenNameMaria Helena
person.givenNameSlobodan
person.identifier.ciencia-id0218-71B2-2DE0
person.identifier.ciencia-idC316-7B1F-4513
person.identifier.orcid0000-0002-5377-9252
person.identifier.orcid0000-0002-5328-5068
person.identifier.orcid0000-0001-7356-8455
person.identifier.orcid0000-0001-8883-9318
person.identifier.orcid0000-0002-9760-5983
person.identifier.orcid0000-0003-4872-9530
person.identifier.ridB-4356-2009
person.identifier.ridF-3616-2011
person.identifier.ridJ-3679-2013
person.identifier.ridK-2840-2018
person.identifier.scopus-author-id57190384213
person.identifier.scopus-author-id7005654016
person.identifier.scopus-author-id7004884924
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication85147066-02a5-4267-a7c4-2576f5145e99
relation.isAuthorOfPublicationa655935b-79ea-4a32-b931-5dd72669b663
relation.isAuthorOfPublication429b6d71-328e-42b3-8151-15493de249b8
relation.isAuthorOfPublicationdf8e4c3e-e516-40d8-8323-b4c64bbdae59
relation.isAuthorOfPublication9e92c2e7-f179-42a4-b284-2b30b769aa0b
relation.isAuthorOfPublication97d750f8-d331-4711-945a-96d57ca31b0d
relation.isAuthorOfPublication.latestForDiscovery97d750f8-d331-4711-945a-96d57ca31b0d

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
Sensing surface_PAlmeida_ADF.pdf
Size:
1.93 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

ISEL - Física - Artigos