Growth of para-hexaphenyl thin films on flat, atomically clean versus air-passivated TiO_{2}(110) surfaces

2015
journal article
article
cris.lastimport.wos2024-04-10T00:09:57Z
dc.abstract.enWe report on para-hexaphenyl (6P) ultrathin film growth on freshly prepared and air-passivated atomically flat rutile titanium dioxide single-crystal (110) surfaces. The surface morphology of the developed structures has been investigated in situ and ex situ by means of various scanning probe techniques and electron microscopy. In situ 6P deposition results in the formation of a wetting layer of lying molecules coexisting with bunches of tens of micrometers long needles oriented along the TiO_{2}[11̅0] surface direction. The observed bunching of the 3–5 nm high needles is explained in terms of anisotropic diffusion paths along and perpendicular to the needles. Air exposure of the as-prepared films induces the formation of small features at the cost of the 6P wetting layer, whereas the needles stay unchanged. In contrast, 6P deposition on already air-passivated TiO_{2}(110) yields the formation of dendritic islands, composed of roughly upright-standing molecules. No 6P wetting layer forms on the air-passivated surface. In addition to air exposure, we have checked the impact of surface modification via ion beam bombardment. Growth of 6P on gradient ion-beam-modified titanium dioxide substrates kept at either room or elevated temperature reveals that a slight surface roughening is sufficient to switch the film from lying molecular orientation to upright-standing orientation. However, surface stoichiometry severely influences film properties like size, density, and shape of the 6P islands.pl
dc.affiliationWydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiegopl
dc.contributor.authorWrana, Dominik - 166043 pl
dc.contributor.authorKratzer, Markuspl
dc.contributor.authorSzajna, Konrad - 167877 pl
dc.contributor.authorNikiel, Marek - 115663 pl
dc.contributor.authorJany, Benedykt - 102112 pl
dc.contributor.authorKorzekwa, Marcin - 103680 pl
dc.contributor.authorTeichert, Christianpl
dc.contributor.authorKrok, Franciszek - 100497 pl
dc.date.accessioned2015-12-09T09:25:33Z
dc.date.available2015-12-09T09:25:33Z
dc.date.issued2015pl
dc.description.number29pl
dc.description.physical17004-17015pl
dc.description.publication0,7pl
dc.description.volume119pl
dc.identifier.doi10.1021/acs.jpcc.5b04384pl
dc.identifier.eissn1932-7455pl
dc.identifier.issn1932-7447pl
dc.identifier.urihttp://ruj.uj.edu.pl/xmlui/handle/item/17913
dc.languageengpl
dc.language.containerengpl
dc.rightsDodaję tylko opis bibliograficzny*
dc.rights.licencebez licencji
dc.rights.uri*
dc.subtypeArticlepl
dc.titleGrowth of para-hexaphenyl thin films on flat, atomically clean versus air-passivated TiO_{2}(110) surfacespl
dc.title.journalThe Journal of Physical Chemistry. Cpl
dc.typeJournalArticlepl
dspace.entity.typePublication
cris.lastimport.wos
2024-04-10T00:09:57Z
dc.abstract.enpl
We report on para-hexaphenyl (6P) ultrathin film growth on freshly prepared and air-passivated atomically flat rutile titanium dioxide single-crystal (110) surfaces. The surface morphology of the developed structures has been investigated in situ and ex situ by means of various scanning probe techniques and electron microscopy. In situ 6P deposition results in the formation of a wetting layer of lying molecules coexisting with bunches of tens of micrometers long needles oriented along the TiO_{2}[11̅0] surface direction. The observed bunching of the 3–5 nm high needles is explained in terms of anisotropic diffusion paths along and perpendicular to the needles. Air exposure of the as-prepared films induces the formation of small features at the cost of the 6P wetting layer, whereas the needles stay unchanged. In contrast, 6P deposition on already air-passivated TiO_{2}(110) yields the formation of dendritic islands, composed of roughly upright-standing molecules. No 6P wetting layer forms on the air-passivated surface. In addition to air exposure, we have checked the impact of surface modification via ion beam bombardment. Growth of 6P on gradient ion-beam-modified titanium dioxide substrates kept at either room or elevated temperature reveals that a slight surface roughening is sufficient to switch the film from lying molecular orientation to upright-standing orientation. However, surface stoichiometry severely influences film properties like size, density, and shape of the 6P islands.
dc.affiliationpl
Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego
dc.contributor.authorpl
Wrana, Dominik - 166043
dc.contributor.authorpl
Kratzer, Markus
dc.contributor.authorpl
Szajna, Konrad - 167877
dc.contributor.authorpl
Nikiel, Marek - 115663
dc.contributor.authorpl
Jany, Benedykt - 102112
dc.contributor.authorpl
Korzekwa, Marcin - 103680
dc.contributor.authorpl
Teichert, Christian
dc.contributor.authorpl
Krok, Franciszek - 100497
dc.date.accessioned
2015-12-09T09:25:33Z
dc.date.available
2015-12-09T09:25:33Z
dc.date.issuedpl
2015
dc.description.numberpl
29
dc.description.physicalpl
17004-17015
dc.description.publicationpl
0,7
dc.description.volumepl
119
dc.identifier.doipl
10.1021/acs.jpcc.5b04384
dc.identifier.eissnpl
1932-7455
dc.identifier.issnpl
1932-7447
dc.identifier.uri
http://ruj.uj.edu.pl/xmlui/handle/item/17913
dc.languagepl
eng
dc.language.containerpl
eng
dc.rights*
Dodaję tylko opis bibliograficzny
dc.rights.licence
bez licencji
dc.rights.uri*
dc.subtypepl
Article
dc.titlepl
Growth of para-hexaphenyl thin films on flat, atomically clean versus air-passivated TiO_{2}(110) surfaces
dc.title.journalpl
The Journal of Physical Chemistry. C
dc.typepl
JournalArticle
dspace.entity.type
Publication

* The migration of download and view statistics prior to the date of April 8, 2024 is in progress.

Views
17
Views per month
Views per city
Ashburn
2
Wroclaw
2
Chandler
1
Des Moines
1
Dublin
1

No access

No Thumbnail Available