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Keywords:

  • colloids;
  • drug delivery;
  • fluorescence spectroscopy;
  • host–guest systems;
  • nanotechnology

Abstract

Thumbnail image of graphical abstract

Tell your guests when it's time to go: When avidin caps are attached to biotinylated colloidal mesoporous silica, the four subunits of the protein avidin can each bind to a biotin moiety attached to the surface (see picture). The resulting material is a promising candidate for the design of smart detergents or drug-delivery systems. The caps can be opened to release guest molecules by controlled enzymatic hydrolysis of the protein.