English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
  Local TagsRelease HistoryDetailsSummary

Released
Journal Article

Suspensions of modified TiO2 nanoparticles with supreme UV filtering ability.

MPS-Authors
/persons/resource/persons206062

Godec,  A.
Research Group of Mathematical Biophysics, MPI for Biophysical Chemistry, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)

2473996_Suppl.pdf
(Supplementary material), 276KB

Citation

Ukmar, T., Godec, A., Maver, U., Planinsek, O., Bele, M., Jamnik, J., et al. (2009). Suspensions of modified TiO2 nanoparticles with supreme UV filtering ability. Journal of Materials Chemistry, 19(43), 8176-8183. doi:10.1039/b913180a.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-D833-9
Abstract
TiO2 nanoparticles (20-23 nm in size) were coated with a silica layer onto which lauric acid was strongly bound. The strong (probably covalent) bonding was proved using detailed comparative thermal analysis. The functionalized TiO2 nanoparticles exhibited significantly reduced agglomeration, both in dry and in dispersed states (in oily media). The reduced tendency towards agglomeration was consistent with contact angle measurements which showed an increased hydrophobicity of functionalized TiO2. The strong (covalent) bonding also greatly improved the stability of the nanoparticulate sample in suspensions. Finally, the UV filtering efficiency of functionalized samples was much improved when compared to non-functionalized or those functionalized using conventional stabilizers based on adsorption. This effect was consistent with our theoretical prediction in which we correlated the particle size and the UV filtering ability.