| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 594690 | Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2011 | 7 Pages |
We developed a templating method based on NeutrAvidin–biotin interaction, for the preparation of hollow microcapsules composed of DNA. In this method, porous calcium carbonate microparticles were employed as a sacrificial template and an adsorbent for DNA, and NeutrAvidin was chosen as a cross-linker for biotin-labeled DNA. By using biotin-labeled DNA with a degree of biotinylation high enough to retain a hollow spherical structure, hollow DNA microcapsules were obtained with the same size as the templates after the dissolution of the templates with chelating agents. In addition, the combination biotin-labeled DNA and NeutrAvidin could be applied to layer-by-layer assembled multilayers. Layer-by-layer assembled capsules exhibited the size-dependent permeability of macromolecular solutes. This study suggests that our method would be facile and widely applicable to prepare various polymer capsules.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Preparation technique for hollow DNA microcapsules cross-linked with NeutrAvidin. ► Highly biotinylated DNA is required to retain a hollow spherical structure. ► Layer-by-layer assemblies can be formed with biotin-labeled DNA and NeutrAvidin.
