Impact of Oxygen Coadsorption on Intercalation of Cobalt under the h-BN Nanomesh.
(2009) In Nano Letters 9. p.2780-2787- Abstract
- The process of penetration of cobalt atoms through the h-BN nanomesh on Rh(111) is investigated with both spectroscopic and microscopic techniques. It is discovered that oxygen coadsorption can drastically modify the physical properties and behavior of the deposited Co clusters upon postannealing. In the absence of oxygen, Co forms small nanoparticles in the pores (bonding parts) of the h-BN nanomesh, which start to agglomerate at elevated temperatures without any considerable intercalation. However, even a tiny amount of coadsorbed oxygen reduces cobalt agglomeration and greatly promotes its intercalation and trapping under h-BN. The oxygen exposure necessary for a complete intercalation of 1-2 monolayers of Co is very low, and the... (More)
- The process of penetration of cobalt atoms through the h-BN nanomesh on Rh(111) is investigated with both spectroscopic and microscopic techniques. It is discovered that oxygen coadsorption can drastically modify the physical properties and behavior of the deposited Co clusters upon postannealing. In the absence of oxygen, Co forms small nanoparticles in the pores (bonding parts) of the h-BN nanomesh, which start to agglomerate at elevated temperatures without any considerable intercalation. However, even a tiny amount of coadsorbed oxygen reduces cobalt agglomeration and greatly promotes its intercalation and trapping under h-BN. The oxygen exposure necessary for a complete intercalation of 1-2 monolayers of Co is very low, and the formation of oxidic species can be easily avoided. The nanomesh structure remains intact upon intercalating submonolayer amounts of Co, while further intercalation gradually distorts and finally destroys the periodic corrugation. Fortunately, this process is not accompanied by damaging the h-BN sheet itself, and the original structure can be restored by removing Co upon annealing at higher temperatures. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1434557
- author
- Preobrajenski, Alexei LU ; Ng, May Ling LU ; Vinogradov, N A ; Vinogradov, A S ; Lundgren, Edvin LU ; Mikkelsen, Anders LU and Mårtensson, Nils LU
- organization
- publishing date
- 2009
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Nano Letters
- volume
- 9
- pages
- 2780 - 2787
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- wos:000268138600048
- pmid:19492822
- scopus:67650376603
- pmid:19492822
- ISSN
- 1530-6992
- DOI
- 10.1021/nl901316p
- language
- English
- LU publication?
- yes
- id
- 278076a8-0ea0-4e18-b551-0d25293698b9 (old id 1434557)
- date added to LUP
- 2016-04-01 14:16:56
- date last changed
- 2022-02-04 20:03:36
@article{278076a8-0ea0-4e18-b551-0d25293698b9, abstract = {{The process of penetration of cobalt atoms through the h-BN nanomesh on Rh(111) is investigated with both spectroscopic and microscopic techniques. It is discovered that oxygen coadsorption can drastically modify the physical properties and behavior of the deposited Co clusters upon postannealing. In the absence of oxygen, Co forms small nanoparticles in the pores (bonding parts) of the h-BN nanomesh, which start to agglomerate at elevated temperatures without any considerable intercalation. However, even a tiny amount of coadsorbed oxygen reduces cobalt agglomeration and greatly promotes its intercalation and trapping under h-BN. The oxygen exposure necessary for a complete intercalation of 1-2 monolayers of Co is very low, and the formation of oxidic species can be easily avoided. The nanomesh structure remains intact upon intercalating submonolayer amounts of Co, while further intercalation gradually distorts and finally destroys the periodic corrugation. Fortunately, this process is not accompanied by damaging the h-BN sheet itself, and the original structure can be restored by removing Co upon annealing at higher temperatures.}}, author = {{Preobrajenski, Alexei and Ng, May Ling and Vinogradov, N A and Vinogradov, A S and Lundgren, Edvin and Mikkelsen, Anders and Mårtensson, Nils}}, issn = {{1530-6992}}, language = {{eng}}, pages = {{2780--2787}}, publisher = {{The American Chemical Society (ACS)}}, series = {{Nano Letters}}, title = {{Impact of Oxygen Coadsorption on Intercalation of Cobalt under the h-BN Nanomesh.}}, url = {{http://dx.doi.org/10.1021/nl901316p}}, doi = {{10.1021/nl901316p}}, volume = {{9}}, year = {{2009}}, }