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  4. Plasmamodifikation bimetallischer Nanokolloidkristalle zur Erzeugung chemisch aktiver dünner Schichten
 
Zitierlink URN
https://nbn-resolving.de/urn:nbn:de:gbv:46-diss000117086

Plasmamodifikation bimetallischer Nanokolloidkristalle zur Erzeugung chemisch aktiver dünner Schichten

Veröffentlichungsdatum
2009-06-11
Autoren
Gehl, Bernhard  
Betreuer
Bäumer, Marcus  
Gutachter
Falta, Jens  
Zusammenfassung
Self-assembled layers of bimetallic Co-Pt alloy nanocolloids were prepared from suspension to act as model systems for chemically active surface coatings. A compact, versatile and easy to maintain rf plasma source was constructed to serve as a tool for cleaning and non-destructive surface modification of the deposited particle arrays while avoiding sample contamination from atmospheric exposure. It was shown that the original shell of passivating ligands can be completely removed using a sequence of oxygen and hydrogen plasmas while preserving the shape and size of the individual particles with only minor effects on layer ordering. The plasma modification of the particle surfaces however results in hydrogen loaded surfaces with a remaining fraction of oxidic cobalt dominating the surface chemistry after annealing. While the plasma treatment preserves the sample structure during ligand removal it causes complex constrains in the choice of the materials system components.
Schlagwörter
colloid

; 

colloidal crystal

; 

thin films

; 

catalysis

; 

plasma surface modification

; 

plasma source

; 

surface chemistry

; 

ligand removal

; 

surface modification

; 

XPS

; 

SEM

; 

TPD

; 

GISAXS

; 

TEM
Institution
Universität Bremen  
Fachbereich
Fachbereich 02: Biologie/Chemie (FB 02)  
Dokumenttyp
Dissertation
Zweitveröffentlichung
Nein
Sprache
Deutsch
Dateien
Lade...
Vorschaubild
Name

00011708.pdf

Size

22.17 MB

Format

Adobe PDF

Checksum

(MD5):325cd19c476d39244814aea0de57a417

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