eprintid: 7324
rev_number: 4
userid: 6
dir: disk0/00/00/73/24
datestamp: 2011-11-10 19:39:05
lastmod: 2016-11-15 13:41:02
status_changed: 2011-11-10 19:39:05
type: thesis_degree
metadata_visibility: show
contact_email: olk5@pitt.edu
item_issues_count: 0
eprint_status: archive
creators_name: Kuzmych, Oleksandr Kuzmych
creators_email: olk5@pitt.edu
creators_id: OLK5
title: Detection of Nitric Oxide usingCarbon Nanotube Field-Effect Transistors
ispublished: unpub
divisions: sch_as_chemistry
full_text_status: public
keywords: asthma; Carbon nanotubes; detection; nitric oxide; oxidation
abstract: A new method for detection of nitric oxide in gas phase is based on acombination of catalytic conversion and conductivity measurements using achemically functionalized carbon nanotube field-effect transistor (NTFET) device.Gas mixtures containing nitric oxide (NO) are passed through a catalytic converter(CrO3) which converts NO into nitrogen dioxide (NO2). The latter is delivered tothe surface of the NTFET sensor coated with poly(ethylene imine) (PEI).Interaction of the gas with a chemically functionalized NTFET results in aconductivity change that is proportional to the NO gas concentration. The widerange of NO gas concentrations from approximately 2 ppb to 5 ppm was tested. Thedetection limit of NO has been measured as 5ppb (S/N=3) in inert atmosphere at afixed relative humidity (30%). Cross sensitivity to carbon dioxide and oxygen wasmeasured in the gas mixture, modeling human breath conditions. If CO2 is removedby means of an ascarite trap, the new method offers the advantage of low cost,compact size and simplicity of set up.
date: 2007-06-14
date_type: completed
institution: University of Pittsburgh
refereed: TRUE
etdcommittee_type: committee_chair
etdcommittee_type: committee_member
etdcommittee_type: committee_member
etdcommittee_name: Star, Alex
etdcommittee_name: Amemiya, Shigeru
etdcommittee_name: Chapman, Toby
etdcommittee_email: astar@pitt.edu
etdcommittee_email: amemiya@pitt.edu
etdcommittee_email: tchapman@imap.pitt.edu
etdcommittee_id: ASTAR
etdcommittee_id: AMEMIYA
etdcommittee_id: TCHAPMAN
etd_defense_date: 2007-01-11
etd_approval_date: 2007-06-14
etd_submission_date: 2007-04-19
etd_access_restriction: immediate
etd_patent_pending: FALSE
assigned_doi: doi:10.5195/pitt.etd.2011.7324
thesis_type: thesis
degree: MS
committee: Alex Star (astar@pitt.edu) - Committee Chair
committee: Shigeru Amemiya (amemiya@pitt.edu) - Committee Member
committee: Toby Chapman (tchapman@imap.pitt.edu) - Committee Member
etdurn: etd-04192007-141855
other_id: http://etd.library.pitt.edu/ETD/available/etd-04192007-141855/
other_id: etd-04192007-141855
citation:   Kuzmych, Oleksandr Kuzmych  (2007) Detection of Nitric Oxide usingCarbon Nanotube Field-Effect Transistors.  Master's Thesis, University of Pittsburgh.    (Unpublished)  
document_url: http://d-scholarship-dev.library.pitt.edu/7324/1/Kuzmych0422607.pdf