Show simple item record

dc.contributor.advisorZagozdzon-Wosik, Wanda
dc.creatorDas, Susmi
dc.date.accessioned2016-08-20T22:26:26Z
dc.date.available2016-08-20T22:26:26Z
dc.date.createdMay 2014
dc.date.issued2014-05
dc.identifier.urihttp://hdl.handle.net/10657/1429
dc.description.abstractTransplantation of Islet of Langerhans is a treatment used in Diabetes Type I with an objective to introduce beta cells for secretion of insulin for controlling the glucose level in the body. Our project is focused on in vitro culturing of endothelial cells and mesenchymal cells on biocompatible titanium diboride substrates patterned as circles and lines organized as arrays to induce interaction of these layers with the Islets of Langerhans for their in vitro prolonged viability. Our designed BIOMEMS device evaluates the influence of substrate material properties such as mechanical, chemical and electrical using 2D sheet based configurations. The device has matrices of different geometries, to determine factors that affect cell growth and orientation. With the design of patterned geometries on the titanium diboride wafers, modification of the surface properties and biocompatible material usage, we can focus on cell adhesion, growth and orientation. Titanium diboride material was characterized for surface composition, surface roughness, hardness, Young’s modulus and wettability. This BioMEMS device mimics native cellular microenvironment, in terms of topology that provides mechanical support and is expected to regulate the cellular activities such as adhesion, adhesion and viability. Our experiments demonstrated TiB2 as a probable material showing biocompatibility and three weeks long viability of cells and islets. Silicon integrated circuit (IC) and MEMS technology were used to make the substrates and confocal microscopy on fluorescent dyes was used for imaging the endothelial cell (EC) and islet viability.
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.rightsThe author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s).
dc.subjectTItanium diboride
dc.subjectXPS
dc.subjectAFM
dc.subjectYoung's modulus,HUVEC
dc.subjectMSC
dc.subjectislet
dc.titleMICROFABRICATION OF TITANIUM DIBORIDE PATTERNED ON SILICON SUBSTRATES FOR MONO- AND CO-CULTURE OF ENDOTHELIAL AND MESENCHYMAL STEM CELLS
dc.date.updated2016-08-20T22:26:26Z
dc.type.genreThesis
thesis.degree.nameDoctor of Philosophy
thesis.degree.levelDoctoral
thesis.degree.disciplineElectrical Engineering
thesis.degree.grantorUniversity of Houston
thesis.degree.departmentElectrical and Computer Engineering, Department of
dc.contributor.committeeMemberMerchant, Fatima
dc.contributor.committeeMemberCharlson, Earl J.
dc.contributor.committeeMemberPei, Shin-Shem Steven
dc.contributor.committeeMemberWosik, Jarek
dc.contributor.committeeMemberGaber, A. Osama
dc.contributor.committeeMemberSabek, Omaima
dc.type.dcmiText
dc.format.digitalOriginborn digital
dc.description.departmentElectrical and Computer Engineering, Department of
thesis.degree.collegeCullen College of Engineering


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record