PMID- 20175576
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20100528
LR  - 20100223
IS  - 1520-5827 (Electronic)
IS  - 0743-7463 (Linking)
VI  - 26
IP  - 5
DP  - 2010 Mar 2
TI  - ToF-SIMS and XPS studies of the adsorption characteristics of a Zn-porphyrin on 
      TiO2.
PG  - 3531-8
LID - 10.1021/la9032139 [doi]
AB  - Time-of-flight secondary ion mass spectrometry (ToF-SIMS) and X-ray photoelectron 
      spectroscopy (XPS) were used to study monolayers (ML) and thick films of 
      porphyrin Zn-TESP (C(67)H(75)N(5)O(5)SiZn) attached to titanium dioxide (TiO(2)) 
      substrates via silanization. Films on ideal hydroxyl-terminated silicon (SiO(2)) 
      surfaces were used for comparison. ToF-SIMS and XPS spectra show that the type of 
      adsorption varies depending on the thickness of the organic film, the preparation 
      temperature, and the adsorption time. We show that the intensity of a molecular 
      peak at mass 1121.5 u in ToF-SIMS can be used as a direct measure of the ratio of 
      chemisorption/physisorption of Zn-TESP. On TiO(2), the amount of chemisorbed 
      porphyrin can be increased by increasing the reaction temperature and time during 
      the silanization process. On the SiO(2) reference, only chemisorbed species were 
      detected under all investigated preparation conditions. The present work thus not 
      only gives information on the Zn-TESP linkage to TiO(2) but provides a direct 
      tool for generally determining the type of adsorption of monolayers.
FAU - Killian, Manuela S
AU  - Killian MS
AD  - Department of Materials Science and Engineering 4, Friedrich-Alexander-University 
      of Erlangen-Nuremberg, Martensstrasse 7, 91058 Erlangen, Germany.
FAU - Gnichwitz, Jan-Frederik
AU  - Gnichwitz JF
FAU - Hirsch, Andreas
AU  - Hirsch A
FAU - Schmuki, Patrik
AU  - Schmuki P
FAU - Kunze, Julia
AU  - Kunze J
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Langmuir
JT  - Langmuir : the ACS journal of surfaces and colloids
JID - 9882736
EDAT- 2010/02/24 06:00
MHDA- 2010/02/24 06:01
CRDT- 2010/02/24 06:00
PHST- 2010/02/24 06:00 [entrez]
PHST- 2010/02/24 06:00 [pubmed]
PHST- 2010/02/24 06:01 [medline]
AID - 10.1021/la9032139 [doi]
PST - ppublish
SO  - Langmuir. 2010 Mar 2;26(5):3531-8. doi: 10.1021/la9032139.