Investigation of structure and permeability of surfaces modified with self-assembled monolayers

Simple item page
dc.contributor.authorZhang, Minhuien
dc.contributor.committeechairAnderson, Mark R.en
dc.contributor.committeememberBrewer, Karen J.en
dc.contributor.committeememberLong, Gary L.en
dc.contributor.departmentChemistryen
dc.date.accessioned2014-03-14T21:43:16Zen
dc.date.adate2008-08-22en
dc.date.available2014-03-14T21:43:16Zen
dc.date.issued1996en
dc.date.rdate2008-08-22en
dc.date.sdate2008-08-22en
dc.description.abstractThis research focuses on how the structure of modified interfaces influence the behavior of the interface. Two groups of dialkyl sulfides are prepared and studied: a purely hydrocarbon dialkyl sulfide with the structure CH₃(CH₂)₁₇S(CH₂)<sub>n</sub>CH₃, where n=7, 9, and 17, and a carboxylic acid containing dialkyl sulfide with the structure CH3₃(CH₂)₁₇S(CH₂)<sub>m</sub>COOH, where m=7, 10, and 15. The structure and the permeability of these monolayers are characterized by <i>ex situ</i> and <i>in situ</i> FTIR, contact angle measurements, and electrochemistry. It is found that the two groups of dialkyl sulfides have different surface structures and different monolayer-solution interfacial behaviors. The presence of a polar group, such as -COOH, within the monolayer structure is found to increase the charge transfer properties of the modified electrode by influencing the interfacial structure. The structure and permeability of monolayers prepared from 15-mercaptopentadecanoic acid, 16-mercaptohexadecanoic acid, and their corresponding ethyl esters are also studied. Infrared spectroscopy and electrochemical permeability measurements indicate that the ester monolayers are ordered and have few differences in their structural and physical properties. Monolayers prepared from 15-mercaptopentadecanoic acid and 16-mercaptohexadecanoic acid, however, are structurally and physically different from the esters and each other. The IR and contact angle results indicate that hydrogen bonding interactions between the terminal groups of the monolayers influence the structural organization and physical properties of the monolayer. The extent of the hydrogen bonding interactions within the ω-mercaptoalkanoic acid monolayers appear to be related to the structure of the interface, suggesting that the orientation of the terminal functional group influences its ability to interact within the monolayer.en
dc.description.degreeMaster of Scienceen
dc.format.extentix, 65 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-08222008-063703en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-08222008-063703/en
dc.identifier.urihttp://hdl.handle.net/10919/44354en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1996.Z435.pdfen
dc.relation.isformatofOCLC# 36114120en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectmonolayeren
dc.subjectthiolen
dc.subjectpermeabilityen
dc.subjectdialkylen
dc.subjectmodifieden
dc.subject.lccLD5655.V855 1996.Z435en
dc.titleInvestigation of structure and permeability of surfaces modified with self-assembled monolayersen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineChemistryen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
LD5655.V855_1996.Z435.pdf
Size:
3.16 MB
Format:
Adobe Portable Document Format
Description:
Download

Collections

Masters Theses