polyferrocenylsilane (PFS) block copolymersshell cross‐linked nanocylindersshell cross‐linked nanotubesA new class of metal-containing diblock copolymers, PFS-b-P2VP (PFS = poly(ferrocenyldimethylsilane), P2VP = poly(2-vinylpyridine)), with a hydrophobic organometallic block and a highly polar ...