ToF-SIMS Analysis of UV-Switchable TiO_2-Nanoparticle-Coated Paper Surface
Abstract
The chemical composition of a TiO_2 nanoparticle coated paper surface was analyzed using time-of-flight secondary ion mass spectrometry (ToF-SIMS) to study the interconnection between wettability and surface chemistry on the nanoscale. In this work, a superhydrophobic TiO_2 surface rich in carboxyl-terminated molecules was created by a liquid flame spray process. The TiO_2 nanoparticle coated paper surface can be converted by photocatalytic oxidation into a highly hydrophilic one. Interestingly, the hydrophilic surface can be converted back into a superhydrophobic surface by heat treatment. The results showed that both ultraviolet A (UVA) and oven treatment induce changes in the surface chemistry within a few nanometers of the paper surface. These findings are consistent with those from our previously reported X-ray photoelectron spectroscopy (XPS) analysis, but the ToF-SIMS analysis yields more accurate insight into the surface chemistry.
Additional Information
© 2013 American Chemical Society. Received: November 28, 2012; Revised: February 20, 2013; Published: February 20, 2013. This work was supported by the Finnish Funding Agency for Technology and Innovation (Tekes) under the project "Liquid flame spray nanocoating for flexible roll-to-roll web materials" (Grant No. 40095/11). J.J.S. wishes to thank the Academy of Finland (grant no. 250 122) for financial support.Attached Files
Published - la304731m.pdf
Files
| Name | Size | Download all |
|---|---|---|
|
md5:75978b859509017b69591a6f6ace6c85
|
1.5 MB | Preview Download |
Additional details
- Eprint ID
- 37921
- Resolver ID
- CaltechAUTHORS:20130412-152738813
- 40095/11
- Finnish Funding Agency for Technology and Innovation (Tekes)
- 250 122
- Academy of Finland
- Created
-
2013-04-12Created from EPrint's datestamp field
- Updated
-
2021-11-09Created from EPrint's last_modified field