Laser lithography was used to create novel patterns in thin diblock copolymer
films. These patterns were characterized and an examination of their
formation and growth was conducted. The patterns occurred only in diblock
films, due to the interaction between thermal gradient induced Marangoni flow
and the self assembly of the molecules. Growth of the patterns was found to
be strongly dependent on absorbed power. The impact of film thickness on
pattern growth was mainly due to the corresponding changes in sample reflectance, however a periodic patterning was observed suggesting that growth is also dependent on the amount of 'excess' material (over that required to form complete lamella) available. It was also shown that the pattern growth can occur independently of laser lithography and the Marangoni effect, though laser lithography was required to direct this growth. / Thesis / Master of Applied Science (MASc)
| Identifer | oai:union.ndltd.org:mcmaster.ca/oai:macsphere.mcmaster.ca:11375/16667 |
| Date | 09 1900 |
| Creators | Parete, Joseph |
| Contributors | Preston, John S., Dalnoki-Veress, Kari, Engineering Physics |
| Source Sets | McMaster University |
| Language | English |
| Detected Language | English |
| Type | Thesis |
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