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Keywords:

  • click chemistry;
  • colloids;
  • DNA;
  • host–guest systems;
  • nanotechnology
Thumbnail image of graphical abstract

Letting off steam: A temperature-controlled valve system permits the targeted release of guest fluorescein molecules from the pores of colloidal mesoporous silica particles. The pore-opening temperature is dependent on the length of double-stranded DNA linkers. Avidin proteins that are joined to the DNA by a biotin modification act as the molecular valve at the exits to the pores.