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[资源] Self-Organized Inorganic Nanoparticle Arrays on Protein Lattices

ABSTRACT
Cavities formed by proteins have been utilized as the reaction chamber for the fabrication of a range of inorganic nanoparticles,1-3 providing
control of the size of particles by limiting growth and preventing agglomeration. In crystal form, proteins construct molecular arrays that can
provide regularly arranged sites for nanoparticles. Here we report the fabrication of nanometric iron and indium particles using ferritin, an
iron-storage protein. The indium nanoparticles thus formed have uniform spherical shape with diameter of 6.6 ± 0.5 nm, while the iron
nanoparticles are somewhat irregular in shape (5.8 ± 1.0 nm). Regular two-dimensional arrays of these nanoparticles are successfully produced
by crystallizing ferritin molecules on a water-air interface using the denatured protein film method.4 The lattice constant of these nanoparticle
arrays is 13 nm with hexagonal packing, and arrays of more than 1 ím2 in area can be obtained by transfer onto silicon wafer.
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