Abstract
AbstractSelf‐assembly of colloidal nanoparticles (NPs) is widely employed in nanofabrication to have regulated shape with fascinating functions. However, to have a specific desired shape at centimeter‐scale without template is challenging. Herein, by harnessing the colloidal nanoparticle thin film crack engineering, robust and highly transparent centimeter‐scale rods with uniform width and thickness are obtained. The dimension of these rods can be tailored via controlling the solvent composition, NPs volume fraction, and suspension descending rate. Their mechanical stiffness and elastic properties can be further improved by thermal annealing. It is demonstrated that these rods can be used as probes for surface enhanced Raman scattering detection making use of their rich nanostructured surface. This crack engineering strategy can be used as a universal method to assemble the nanoscale colloids into centimeter‐scale rods for analytical and photoelectrical applications.
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