Abstract
In article number 1803518, Helmut Cölfen and co-workers use analytical ultracentrifugation to fabricate tailored nanoparticle gradient materials. Gradients of gold spheres, gold rods, and spherical iron oxide nanoparticles are generated by sedimentation of the nanoparticles in a thermoreversible gelatin matrix. The materials can be simulated in advance and the gradients are detected online by the optical systems of the centrifuge to produce desired property gradients.
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