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Electric force microscopy of one dimensional nanostructures. / Kimberley F Bell

Swansea University Author: Kimberley F Bell

Abstract

As the limitations of current technology and the possibility of scaling down of technology becomes ever more apparent the drive for smaller, faster, cheaper and more sensitive devices gains momentum. Recent literature reports new and exciting possibilities with zinc oxide based one-dimensional nanom...

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Published: 2010
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
URI: https://cronfa.swan.ac.uk/Record/cronfa42694
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first_indexed 2018-08-02T18:55:19Z
last_indexed 2018-08-03T10:10:51Z
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spelling 2018-08-02T16:24:30.1334020 v2 42694 2018-08-02 Electric force microscopy of one dimensional nanostructures. fe411511eae3ceee5482bd3fbe766490 NULL Kimberley F Bell Kimberley F Bell true true 2018-08-02 As the limitations of current technology and the possibility of scaling down of technology becomes ever more apparent the drive for smaller, faster, cheaper and more sensitive devices gains momentum. Recent literature reports new and exciting possibilities with zinc oxide based one-dimensional nanomaterials rather than the popular carbon nanotubes. The attractiveness of these one-dimensional nanomaterials is the increased surface to volume ratios and the ability of this increased surface area to exhibit sensitivity to a range of gases by altering the conductivity upon absorption of molecules on the surface. The work in this thesis demonstrated the effectiveness of the electric force microscopy technique in imaging conducting and semi-conducting samples. The technique is extremely useful in charging nanomaterials and imaging the sample discharging. This technique allows for the imaging of nanomaterials with varying applied tip bias and the results allowed the determination of a method to calculate the dielectric constant of one dimensional nanomaterials by examining the phase data. The second part of this thesis illustrates the intriguing nature of zinc oxide one dimensional nanomaterials by exploring the gas sensing capabilities of single nanowire devices. The sensitivity observed is mostly likely due to the absorption of electron donating molecules to the surface of the nanowire and hence donating charge carriers into the bulk increasing the conduction. This sensitivity can also be due to electron withdrawing molecules being absorbed onto the surface of the nanowire which reduces the conduction. E-Thesis Electrical engineering.;Nanotechnology. 31 12 2010 2010-12-31 COLLEGE NANME Engineering COLLEGE CODE Swansea University Doctoral Ph.D 2018-08-02T16:24:30.1334020 2018-08-02T16:24:30.1334020 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Kimberley F Bell NULL 1 0042694-02082018162514.pdf 10807463.pdf 2018-08-02T16:25:14.6100000 Output 28502469 application/pdf E-Thesis true 2018-08-02T16:25:14.6100000 false
title Electric force microscopy of one dimensional nanostructures.
spellingShingle Electric force microscopy of one dimensional nanostructures.
Kimberley F Bell
title_short Electric force microscopy of one dimensional nanostructures.
title_full Electric force microscopy of one dimensional nanostructures.
title_fullStr Electric force microscopy of one dimensional nanostructures.
title_full_unstemmed Electric force microscopy of one dimensional nanostructures.
title_sort Electric force microscopy of one dimensional nanostructures.
author_id_str_mv fe411511eae3ceee5482bd3fbe766490
author_id_fullname_str_mv fe411511eae3ceee5482bd3fbe766490_***_Kimberley F Bell
author Kimberley F Bell
author2 Kimberley F Bell
format E-Thesis
publishDate 2010
institution Swansea University
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
active_str 0
description As the limitations of current technology and the possibility of scaling down of technology becomes ever more apparent the drive for smaller, faster, cheaper and more sensitive devices gains momentum. Recent literature reports new and exciting possibilities with zinc oxide based one-dimensional nanomaterials rather than the popular carbon nanotubes. The attractiveness of these one-dimensional nanomaterials is the increased surface to volume ratios and the ability of this increased surface area to exhibit sensitivity to a range of gases by altering the conductivity upon absorption of molecules on the surface. The work in this thesis demonstrated the effectiveness of the electric force microscopy technique in imaging conducting and semi-conducting samples. The technique is extremely useful in charging nanomaterials and imaging the sample discharging. This technique allows for the imaging of nanomaterials with varying applied tip bias and the results allowed the determination of a method to calculate the dielectric constant of one dimensional nanomaterials by examining the phase data. The second part of this thesis illustrates the intriguing nature of zinc oxide one dimensional nanomaterials by exploring the gas sensing capabilities of single nanowire devices. The sensitivity observed is mostly likely due to the absorption of electron donating molecules to the surface of the nanowire and hence donating charge carriers into the bulk increasing the conduction. This sensitivity can also be due to electron withdrawing molecules being absorbed onto the surface of the nanowire which reduces the conduction.
published_date 2010-12-31T03:53:28Z
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score 11.0127

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