Mechanically controlled liesegang pattern formation in stretchable polyacrylamide gels for elastic deformation tracking

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buir.advisorBaytekin, Bilge
dc.contributor.authorMorsali, Mohammad
dc.date.accessioned2019-08-27T10:13:24Z
dc.date.available2019-08-27T10:13:24Z
dc.date.copyright2019-07
dc.date.issued2019-07
dc.date.submitted2019-08-26
dc.descriptionCataloged from PDF version of article.en_US
dc.descriptionThesis (M.S.): Bilkent University, Department of Chemistry, İhsan Doğramacı Bilkent University, 2019.en_US
dc.descriptionIncludes bibliographical references. (leaves 53-57).en_US
dc.description.abstractPattern formation in nature has been intellectually appealing for many scientists since antiquity. Simultaneous diffusion and reaction of chemicals in gel media may lead to precipitation and complex pattern formation through self-assembly. Periodic precipitations patterns, also known as Liesegang patterns (LP), are one of the stimulating examples of such self-assembling reaction-diffusion systems. So far, it was shown that LP’s periodic band structure and their unique geometry can be controlled by controlling the reaction parameters (e.g. concentration of the reactants) and affecting the reaction medium (e.g. external electrical field). However, so far, the research on LPs have been concentrated mostly around how these patterns are forming, to retrieve information to build a universal mathematical model for them. Although there are studies showing the effect of external fields on the development of these patterns, to the best of our knowledge, so far, there is no example of these systems, used to retrieve information about the changes in the environment as they form. Here, we first show the formation of Liesegang rings by a diffusion-precipitation reaction in a stretchable hydrogel. Then, we present how to use these patterns to ‘read’ the duration, the extent, and the direction of gel deformation. Also, we describe deviations from LP behavior for the patterns (spacing that can be mathematically defined by a geometrical series) formed after the unloading. We believe this first display of such an ‘environmental sensing’ to be a starting point for more investigations on many aesthetically appealing and mathematically challenging self-assembled systems, which have been studied for decades.en_US
dc.description.provenanceSubmitted by Betül Özen (ozen@bilkent.edu.tr) on 2019-08-27T10:13:24Z No. of bitstreams: 1 Mohammad_Morsali_21701507.pdf: 5001224 bytes, checksum: f29919111806fa3d0843e29dd6891c21 (MD5)en
dc.description.provenanceMade available in DSpace on 2019-08-27T10:13:24Z (GMT). No. of bitstreams: 1 Mohammad_Morsali_21701507.pdf: 5001224 bytes, checksum: f29919111806fa3d0843e29dd6891c21 (MD5) Previous issue date: 2019-08en
dc.description.statementofresponsibilityby Mohammad Morsalien_US
dc.embargo.release2020-02-26
dc.format.extentxx, 57 leaves : illustrations (some color), charts (some color) ; 30 cm.en_US
dc.identifier.itemidB108436
dc.identifier.urihttp://hdl.handle.net/11693/52375
dc.language.isoEnglishen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectLiesegang patternen_US
dc.subjectPost-patternen_US
dc.subjectHydrogelen_US
dc.subjectElastic deformationen_US
dc.titleMechanically controlled liesegang pattern formation in stretchable polyacrylamide gels for elastic deformation trackingen_US
dc.title.alternativeEsneyebilen poliakrilamid jellerde elastik deformasyonun takip edilmesi ıcin mekanik kontrollu liesegang halkalari oluşumuen_US
dc.typeThesisen_US
thesis.degree.disciplineChemistry
thesis.degree.grantorBilkent University
thesis.degree.levelMaster's
thesis.degree.nameMS (Master of Science)

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