A practical process to synthesize bio-colloidal composites was developed on the basis of the noncovalent interactions of icosahedral plant virus turnip yellow mosaic virus (TYMV) and poly(4-vinylpyridine) (P4VP). TYMV particles fully covered the surface of a P4VP ball with a hexagon-like packing. The raspberry-like morphology of TYMV-P4VP colloids and the packing pattern of TYMV were reveale…