Multifunctional nanoparticles are multivalent, remotely-actuated, and imaged non-invasively. Superparamagnetic nanoparticles transduce external electromagnetic energy to heat, thereby melting oligonucleotide duplexes that act as tunable, heat-labile tethers to release model drugs in vivo (see figure).
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Derfus et al. (2007) studied this question.
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