1. Single-molecule detection of airborne singlet oxygen
- Author
-
Naito, Kazuya, Tachikawa, Takashi, Shi-Cong Cui, Sugimoto, Akira, Fujitsuka, Mamoru, and Majima, Tetsuro
- Subjects
Active oxygen -- Optical properties ,Fluorescence microscopy -- Observations ,Titanium dioxide -- Structure ,Titanium dioxide -- Optical properties ,Ultraviolet radiation -- Analysis ,Chemistry - Abstract
Single molecule detection of an airborne single oxygen [(super)1][O.sub.2] molecule diffused from the surface of Ti[O.sub.2] nanoparticles using total internal reflection fluorescence microscopy (TIRFM) is described. It is seen that the current nanosensor using single terrylenediimide (TDI) molecules, which has a detectable number of about 1000 [(super.1)][O.sub.3] molecules in the 70 x 70 [mu][m.sup.2], can easily detect the single [.sup.1O.sub.3] molecule at the distance of >1000 [mu]m from the place of its creation in ambient air.
- Published
- 2006