Self-Assembly and Cross-Linking of Bionanoparticles at Liquid–Liquid InterfacesThis work was supported by the DOE (DE-FG-02-96ER45 and DE-FG02-04ER46126), the NSF for MRSEC at UMass Amherst (DMR 9400488), the Army Research Laboratory through the MURI program, the Max Planck Society, the DFG within the French–German Network on Complex Fluids, and the MAX KADE Foundation. This work benefited from Argonne's Advanced Photon Source (15-ID) and Intense Pulsed Neutron Source supported by the US Department of Energy, Basic Energy Sciences, Office of Science, under contract no. W-31-109-Eng-38. ChemMatCARS Sector 15 is principally supported by the National Science Foundation/Department of Energy under grant no. CHE0087817 and by the Illinois Board of Higher Education. Q.W. thanks the University of South Carolina and USC Nanocenter for financial support. A.F. and P.C. thank Helmuth Möhwald for stimulating discussions.