English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Disentangling Vacancy Oxidation on Metallicity-Sorted Carbon Nanotubes

Mowbray, D. J., Pérez Paz, A., Ruiz-Soria, G., Sauer, M., Lacovig, P., Dalmiglio, M., et al. (2016). Disentangling Vacancy Oxidation on Metallicity-Sorted Carbon Nanotubes. The Journal of Physical Chemistry C, 120(32), 18316-18322. doi:10.1021/acs.jpcc.6b06163.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-1125-6 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-F912-2
Genre: Journal Article

Files

show Files
hide Files
:
acs.jpcc.6b06163.pdf (Publisher version), 2MB
 
File Permalink:
-
Name:
acs.jpcc.6b06163.pdf
Description:
-
Visibility:
Private
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show
hide
Locator:
http://dx.doi.org/10.1021/acs.jpcc.6b06163 (Publisher version)
Description:
-

Creators

show
hide
 Creators:
Mowbray, Duncan John1, Author
Pérez Paz, Alejandro1, Author
Ruiz-Soria, Georgina2, Author
Sauer, Markus2, Author
Lacovig, Paolo3, Author
Dalmiglio, Matteo3, Author
Lizzit, Silvano3, Author
Yanagi, Kazuhiro4, Author
Goldoni, Andrea3, Author
Ayala, Paola2, 5, Author
Pichler, Thomas2, Author
Rubio, Angel1, 6, 7, Author              
Affiliations:
1Nano-Bio Spectroscopy Group and ETSF Scientific Development Centre, Departamento de Física de Materiales, Centro de Física de Materiales CSIC-UPV/EHU-MPC and DIPC, Universidad del País Vasco UPV/EHU, E-20018 San Sebastián, Spain, ou_persistent22              
2Faculty of Physics, University of Vienna, Strudlhofgasse 4, A-1090 Vienna, Austria, ou_persistent22              
3Elettra Sincrotrone Trieste, S.S. 14 km 163.5, 34149 Trieste, Italy, ou_persistent22              
4Department of Physics, Tokyo Metropolitan University, Hachioji, 192-0397 Tokyo, Japan, ou_persistent22              
5Yachay Tech University, School of Physical Sciences and Nanotechnology, 100119-Urcuquí Ecuador, ou_persistent22              
6Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
7Center for Free-Electron Laser Science, Department of Physics, Luruper Chaussee 149, D-22761 Hamburg, Germany, ou_persistent22              

Content

show
hide
Free keywords: -
 Abstract: Pristine single-walled carbon nanotubes (SWCNTs) are rather inert to O2 and N2, which for low doses chemisorb only on defect sites or vacancies of the SWCNTs at the ppm level. However, very low doping has a major effect on the electronic properties and conductivity of the SWCNTs. Already at low O2 doses (80 L), the X-ray photoelectron spectroscopy (XPS) O 1s signal becomes saturated, indicating nearly all the SWCNT's vacancies have been oxidized. As a result, probing vacancy oxidation on SWCNTs via XPS yields spectra with rather low signal-to-noise ratios, even for metallicity-sorted SWCNTs. We show that, even under these conditions, the first principles density functional theory calculated Kohn-Sham O 1s binding energies may be used to assign the XPS O 1s spectra for oxidized vacancies on SWCNTs into its individual components. This allows one to determine the specific functional groups or bonding environments measured. We find the XPS O 1s signal is mostly due to three O-containing functional groups on SWCNT vacancies: epoxy (C2>O), carbonyl (C2>C=O), and ketene (C=C=O), as ordered by abundance. Upon oxidation of nearly all the SWCNT's vacancies, the central peak's intensity for the metallic SWCNT sample is 60% greater than for the semiconducting SWCNT sample. This suggests a greater abundance of O-containing defect structures on the metallic SWCNT sample. For both metallic and semiconducting SWCNTs, we find O2 does not contribute to the measured XPS O 1s spectra.

Details

show
hide
Language(s): eng - English
 Dates: 2016-06-172016-07-212016-08-18
 Publication Status: Published in print
 Pages: 7
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1021/acs.jpcc.6b06163
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: The Journal of Physical Chemistry C
  Abbreviation : J. Phys. Chem. C
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Washington DC : American Chemical Society
Pages: - Volume / Issue: 120 (32) Sequence Number: - Start / End Page: 18316 - 18322 Identifier: ISSN: 1932-7447
CoNE: https://pure.mpg.de/cone/journals/resource/954926947766