Abstract
This report describes characterization of molecular motions of water confined in well-defined 10 nm - 100 nm scale channels on a microchip (called extended-nano spaces) based on NMR spectroscopy results. We found that the relaxation rates of water were increased by size-confinement in the range of not only 200 - 800 nm but also 4 - 40 nm, while the rates did not depend on the space sizes of 40 - 200 nm. These results could be expressed quantitatively by a three-phase exchange model suggesting that the water motions in extended-nano spaces are controlled by the fraction of three phases, including the bulk phase (SB), the proton transfer phase (SP), and the adsorbed phase (Sa).
| Original language | English |
|---|---|
| Pages | 546-548 |
| Number of pages | 3 |
| Publication status | Published - 2006 Jan 1 |
| Externally published | Yes |
| Event | 10th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2006 - Tokyo, Japan Duration: 2006 Nov 5 → 2006 Nov 9 |
Other
| Other | 10th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2006 |
|---|---|
| Country | Japan |
| City | Tokyo |
| Period | 06/11/5 → 06/11/9 |
Keywords
- Extended-nano space
- NMR
- Proton transfer
- Relaxation
- Water
ASJC Scopus subject areas
- Chemical Engineering (miscellaneous)
- Bioengineering