{'fraction_non_alphanumeric': 0.026473099914602904, 'fraction_numerical': 0.0008539709649871904, 'mean_word_length': 5.584269662921348, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Fabricating Ceramic Nanostructures with Ductile-like Compression Behavior via Rapid Self-Assembly of Block Copolymer and Preceramic Polymer Blends

Here, we report a rapid and scalable process for the fabrication of nanostructured silicon carbide (SiC)-based ceramics displaying mechanical metamaterial properties. These novel mesoporous structures are achieved through patterning at the nanoscale via block copolymer (BCP) self-assembly. In this facile process, a blend of preceramic polymer (PCP) and BCP is dissolved in warm solvent, cast, and quickly solidified as an organogel composed of a 3D micelle network. Significantly, these materials rapidly self-assemble and do not necessitate the annealing steps that are typically required for block copolymer self-assembly. The PCP nanostructure of the films is thermally stable and maintained through pyrolytic soft template removal and conversion to ceramic. Exploration of PCP, BCP, and PMMA homopolymer blends resulted in the discovery of a cocontinuous wormlike micelle phase, which after pyrolysis translated into a ceramic nanocoral-like structure with a network of high-aspect-ratio ceramic struts punctuated ...