- CeO2
- ceria
- colloidal
- crystals
- diameter
- fee
- index
- inverse
- macropores
- nm
- opal
- opals
- pbg
- photonic
- pmma
- polymer
- polymethylmethacrylate
- porosity
- position
- powders
- precursor
- prepared
- proportional
- redshift
- refractive
- remove
- retention
- self_assembly
- sensing
- sensitivity
- shift
- sol_gel
- solvent
- spaces
- stability
- structures
- suggesting
- suspensions
- template
- templates
- three_dimensional
- transmittance
- uv_vis
- visible
- vol
- volume
