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High-Throughput Route for Determining the Precise Location of an Individual Carbon Nanotube by Vapor-Phase Hydrofluoric Acid Etching

Novak, Michael A. (2014) High-Throughput Route for Determining the Precise Location of an Individual Carbon Nanotube by Vapor-Phase Hydrofluoric Acid Etching. Master's Thesis, University of Pittsburgh. (Unpublished)

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Knowing the precise location of an individual carbon nanotube is of great importance in regards to studying its extraordinary properties. Until recently, this has been a complex and time consuming process. We have realized the optical visualization of an individual carbon nanotube’s location via a hydrofluoric acid etching technique. This etching technique produces trenches on the Si/SiO2 substrate which are formed by the carbon nanotube-catalyzed etching of the SiO2 thin film. The trenches produced are visible under an optical microscope which allows for the precise location of an individual nanotube to be determined which facilitates their systematic study. Carbon nanotubes were grown by a metal-catalyzed chemical vapor deposition method. The samples were then etched and analyses of individual nanotubes were performed. The CVD grown nanotubes and etched trenches were analyzed using atomic force microscopy. Raman spectroscopy was implemented to study the effects of UV-ozone exposure on individual nanotubes within the trenches. It is shown that UV-ozone modifies the nanotubes structure by producing defects in the nanotube’s graphene lattice and ultimately degrades the nanotube. The degradation of the nanotube is evident by a disappearance of the G-band in the nanotubes Raman spectrum. The hydrofluoric acid etching technique presented here provides a high-throughput route for the systematic analysis of individual carbon nanotubes which is made possible by the optical visualization of a trench which contains the nanotube of interest.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Novak, Michael A.man82@pitt.eduMAN82
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairLiu, Haitaohliu@pitt.eduHLIU
Committee MemberMillstone, Jilljem210@pitt.eduJEM210
Committee MemberStar, Alexastar@pitt.eduASTAR
Date: 27 January 2014
Date Type: Publication
Defense Date: 5 November 2013
Approval Date: 27 January 2014
Submission Date: 3 January 2014
Access Restriction: 3 year -- Restrict access to University of Pittsburgh for a period of 3 years.
Number of Pages: 65
Institution: University of Pittsburgh
Schools and Programs: Dietrich School of Arts and Sciences > Chemistry
Degree: MS - Master of Science
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: Carbon Nanotubes
Date Deposited: 27 Jan 2014 17:33
Last Modified: 27 Jan 2017 06:15


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