The immobilisation of DNA on a solid substrate enables the in vitro observation of biochemical and biophysical processes under strictly defined conditions. First, we here assembled and characterised brushes of DNA on biocompatible silicon chips. We then applied electron beam lithography to create thin DNA brush stripes and to condense them to DNA bundles by addition of spermidine. In contrast to previously described DNA condensates, the growth of these bundles could be guided over tens of micrometers along arbitrary pathways.
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The immobilisation of DNA on a solid substrate enables the in vitro observation of biochemical and biophysical processes under strictly defined conditions. First, we here assembled and characterised brushes of DNA on biocompatible silicon chips. We then applied electron beam lithography to create thin DNA brush stripes and to condense them to DNA bundles by addition of spermidine. In contrast to previously described DNA condensates, the growth of these bundles could be guided over tens of microm...
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