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TEM image of cultured hippocampal cells grown on a matrix of gMμPs functionalized by PEI. Low magnification image revealing that in some parts of the cultures the cell bodies reside on top of a layer of branches that do not form direct physical contact with the gMμPs. Note that only a small part of the shown gold mushrooms “cap” is in contact with the branches. Images are from a 10-days old culture. N, Nucleus; mt, mitochondria; area of flat gold substrate-arrowheads. Scale bar: 1 μm.
