Fig. 1From: Silica nanoparticles with encapsulated DNA (SPED) – a novel surrogate tracer for microbial transmission in healthcareScheme of synthesis of SPED and analysis with qPCR quantification. Legend: TMAPS, N-trimethoxysilylpropyl-N,N,N- trimethylammonium chloride; TEOS, tetraethyl orthosilicateBack to article page