Microscopic colloidal particles allow a precise regulation of chemical reactions in time and place. A controlled assembly of multiple layers of intact lipid vesicles on a solid support provided by layer-by-layer particles functionalized by a covalent attachment of DNA oligonucleotides is reported (see image). Lipophilic complementary oligonucleotides are incorporated into lipid vesicles. Fusion of liposomes and release can be triggered.
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Loew et al. (2009) studied this question.