Nanoscale water condensation on click-functionalized self-assembled monolayers
We have examined the nanoscale adsorption of molecular water under ambient conditions onto a series of well-characterized functionalized surfaces produced by Cu(I)-catalyzed alkyne-azide cycloaddition (CuAAC or "click") reactions on alkyne-terminated self-assembled monolayers on silicon. W...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
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American Chemical Society
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/47143 |
| _version_ | 1848757753072320512 |
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| author | James, M. Ciampi, Simone Darwish, T. Hanley, T. Sylvester, S. Gooding, J. |
| author_facet | James, M. Ciampi, Simone Darwish, T. Hanley, T. Sylvester, S. Gooding, J. |
| author_sort | James, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We have examined the nanoscale adsorption of molecular water under ambient conditions onto a series of well-characterized functionalized surfaces produced by Cu(I)-catalyzed alkyne-azide cycloaddition (CuAAC or "click") reactions on alkyne-terminated self-assembled monolayers on silicon. Water contact angle (CA) measurements reveal a range of macroscopic hydrophilicity that does not correlate with the tendency of these surfaces to adsorb water at the molecular level. X-ray reflectometry has been used to follow the kinetics of water adsorption on these "click"-functionalized surfaces, and also shows that dense continuous molecular water layers are formed over 30 h. For example, a highly hydrophilic surface, functionalized by an oligo(ethylene glycol) moiety (with a CA = 34°) showed 2.9 Å of adsorbed water after 30 h, while the almost hydrophobic underlying alkyne-terminated monolayer (CA = 84°) showed 5.6 Å of adsorbed water over the same period. While this study highlights the capacity of X-ray reflectometry to study the structure of adsorbed water on these surfaces, it should also serve as a warning for those intending to characterize self-assembled monolayers and functionalized surfaces to avoid contamination by even trace amounts of water vapor. Moreover, contact angle measurements alone cannot be relied upon to predict the likely degree of moisture uptake on such surfaces. © 2011 American Chemical Society. |
| first_indexed | 2025-11-14T09:33:06Z |
| format | Journal Article |
| id | curtin-20.500.11937-47143 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:33:06Z |
| publishDate | 2011 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-471432017-09-13T14:28:07Z Nanoscale water condensation on click-functionalized self-assembled monolayers James, M. Ciampi, Simone Darwish, T. Hanley, T. Sylvester, S. Gooding, J. We have examined the nanoscale adsorption of molecular water under ambient conditions onto a series of well-characterized functionalized surfaces produced by Cu(I)-catalyzed alkyne-azide cycloaddition (CuAAC or "click") reactions on alkyne-terminated self-assembled monolayers on silicon. Water contact angle (CA) measurements reveal a range of macroscopic hydrophilicity that does not correlate with the tendency of these surfaces to adsorb water at the molecular level. X-ray reflectometry has been used to follow the kinetics of water adsorption on these "click"-functionalized surfaces, and also shows that dense continuous molecular water layers are formed over 30 h. For example, a highly hydrophilic surface, functionalized by an oligo(ethylene glycol) moiety (with a CA = 34°) showed 2.9 Å of adsorbed water after 30 h, while the almost hydrophobic underlying alkyne-terminated monolayer (CA = 84°) showed 5.6 Å of adsorbed water over the same period. While this study highlights the capacity of X-ray reflectometry to study the structure of adsorbed water on these surfaces, it should also serve as a warning for those intending to characterize self-assembled monolayers and functionalized surfaces to avoid contamination by even trace amounts of water vapor. Moreover, contact angle measurements alone cannot be relied upon to predict the likely degree of moisture uptake on such surfaces. © 2011 American Chemical Society. 2011 Journal Article http://hdl.handle.net/20.500.11937/47143 10.1021/la202359c American Chemical Society restricted |
| spellingShingle | James, M. Ciampi, Simone Darwish, T. Hanley, T. Sylvester, S. Gooding, J. Nanoscale water condensation on click-functionalized self-assembled monolayers |
| title | Nanoscale water condensation on click-functionalized self-assembled monolayers |
| title_full | Nanoscale water condensation on click-functionalized self-assembled monolayers |
| title_fullStr | Nanoscale water condensation on click-functionalized self-assembled monolayers |
| title_full_unstemmed | Nanoscale water condensation on click-functionalized self-assembled monolayers |
| title_short | Nanoscale water condensation on click-functionalized self-assembled monolayers |
| title_sort | nanoscale water condensation on click-functionalized self-assembled monolayers |
| url | http://hdl.handle.net/20.500.11937/47143 |