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Ricardo Figueroa, Karen B. (2017) INTERFACIAL INTERACTION OF GRAPHITIC MATERIALS WITH WATER AND DNA ORIGAMI NANOSTRUCTURES. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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Over the last decade, graphene has gained a lot of interest because of its electrical, mechanical and overall intrinsic properties. The wettability of graphene is paramount in determining its other surface properties and consequently, its applications. On the other hand, DNA origami nanostructures can be synthesized in a wide-variety of shapes, sizes and dimensions. It has been used to pattern different surfaces and act as a template for the CVD growth of inorganic oxides. Research in this area may establish DNA origami as an attractive, low cost template for nanofabrication.
This thesis focuses on the interfacial interaction of HOPG, exfoliated and CVD graphene with hydrophilic materials such as aqueous solutions and DNA origami nanostructures. Specifically, chapter 1 presents a comprehensive review of research involving our materials of interest. Chapter 2 reports the surfactant-free exfoliation of graphite in a weakly basic solution to obtain few layer graphene sheets. This work reversed the notion that organic solvents or ionic surfactants were needed for the exfoliation process. Chapter 3 depicts the deposition of DNA origami nanostructures onto HOPG. This work analyzed the interaction of ds-DNA with a clean and contaminated graphitic substrate and the CVD growth of SiO2 specifically on the DNA origami. Finally, chapter 4 reports the encapsulation and thermal stability of DNA origami under CVD graphene, demonstrating that it is possible to use graphene as a protection barrier for materials that may be prone to degradation or decomposition under harsh conditions. Understanding the interaction of carbon materials with hydrophilic components will be important for future applications, such as the fabrication of new sensors and electronic devices.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Ricardo Figueroa, Karen B.kbr6@pitt.edukbr6
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairLiu,
Committee MemberStar,
Committee MemberLaaser,
Committee MemberLi,
Date: 28 September 2017
Date Type: Publication
Defense Date: 20 July 2017
Approval Date: 28 September 2017
Submission Date: 9 August 2017
Access Restriction: 1 year -- Restrict access to University of Pittsburgh for a period of 1 year.
Number of Pages: 153
Institution: University of Pittsburgh
Schools and Programs: Dietrich School of Arts and Sciences > Chemistry
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: graphene, DNA Origami
Date Deposited: 29 Sep 2017 00:10
Last Modified: 28 Sep 2018 05:15


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