Patterning well-controlled cross section of ordered 3D architecture via capillary bridge route

Three-dimensional (3D) ordered nanoparticle microstructures possess multidimensional effects than 2D structures, which bring novel features for the application of biotechnology, magnetic device, catalysis and optoelectronic. However, complexity to manipulate ordered microstructures with additional dimensions triggered by long distance interactions between nanoparticles or external force from fluid, electric or magnetic field, thus leading to random and uncontrollable displacement of nanoparticle. In the present work, well-controlled cross-section of ordered 3D microstructures is proposed on assembly of nanoparticles, which achieved by manipulating capillary bridges. Experimental results reveal that the formation of various cross-sections dependents on concentration (C) and diameter of nanoparticle. Due to the building block and solvents has no special request, this technique can be extend to other materials. Owing to the controllable morphology, we can manipulate the waveguiding distance of 3D architectures. Thus, our research highlight the opportunity for creating cross section controlled 3D architectures with potential applications in optoelectronics.