The bottom-up control of the three-dimensional shapes of objects in a wide range of sizes, from nanometer to millimeter, has attracted attention in diverse fields. [1,2] For instance, metal nanocrystals having various shapes, such as spherical, cubic, hexagonal plate, and octahedral, have been extensively investigated owing to interest in crystal growth [3] and the control of catalytic activities. [4] Among the inorganic metal oxides and minerals, for example, the crystallization and morphology control of CaCO 3 have been of interest for decades, with relation to biomineralization, to produce the more complex structures that living organisms produce. [5] More recently, sol-gel polymerization using the surface of supramolecular assemblies as templates has been extensively investigated for the fabrication of various well-defined nanoand microsized objects such as mesoporous silica, [6] hollow tubes, [7] and helical ribbon structures. [8] In spite of diverse approaches for controlling the sizes and shapes of inorganic materials in the micro and nanometer ranges, less attention has been paid to organic network polymers, because the network polymers are generally not moldable nor can be processed after formation of the networks as they are insoluble in all solvents and have no observed melting points. As a bottom-up approach, emulsion polymerization using micelles and vesicles as templates produce spherical particles, [9] hollow spherical particles, [10] and a layer structure, [11] whereas the top-down approaches, nanoimprint lithography [12] with photoresist and three-dimensional microfabrication by two-photon laser chemistry, [13] have been reported for controlling the network polymers to form
