|
Hokkaido University Collection of Scholarly and Academic Papers >
Research Institute for Electronic Science >
Peer-reviewed Journal Articles, etc >
Experimental evaluation of diffusion constant in a thin polymer film by triplet lifetime analysis of single molecules
| Title: | Experimental evaluation of diffusion constant in a thin polymer film by triplet lifetime analysis of single molecules |
| Authors: | Chiba, Takashi Browse this author | | Fujiwara, Hideki Browse this author →KAKEN DB | | Hotta, Jun-ichi Browse this author | | Takeuchi, Shigeki Browse this author →KAKEN DB | | Sasaki, Keiji Browse this author →KAKEN DB |
| Keywords: | Triplet lifetime analysis | | Single-molecule spectroscopy | | Photon interdetection time analysis method | | Oxygen diffusion constant | | Thin polymer film |
| Issue Date: | 15-Jun-2012 |
| Publisher: | Elsevier B.V. |
| Journal Title: | Journal of Photochemistry and Photobiology A: Chemistry |
| Volume: | 238 |
| Start Page: | 24 |
| End Page: | 28 |
| Publisher DOI: | 10.1016/j.jphotochem.2012.04.013 |
| Abstract: | We propose a method for dynamically sensing oxygen concentration in a local nanoscale domain of a thin polymer film using histograms of photon interdetection times of single molecules. By temporally analyzing the histograms, a dynamical change in the triplet lifetime of single molecules in thin polymer films with different thicknesses can be measured with respect to the oxygen concentration in a gas cell. From the time lags for observing the triplet lifetime change in the histograms due to differences in the oxygen diffusion times in the films, we estimate the diffusion constants in a local nanoscale domain of films, which approximately corresponds to the reported values in the bulk film. Thus, we conclude that this method is applicable to in situ nanoscale environmental sensors with high spatial resolution in heterogeneous materials, such as polymer blends, biological cells, and thin-film devices. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/49569 |
| Appears in Collections: | 電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 藤原 英樹
|
