Sugar‐Derived Isotropic Nanoscale Polycrystalline Graphite Capable of Considerable Plastic Deformation. Issue 31 (1st July 2022)

• Record Type: Journal Article
• Authors: Sun, Boqian; Chen, Daming; Cheng, Yuan; Fei, Weidong; Jiang, Danyu; Tang, Sufang; Zhao, Guangdong; Song, Juntao; Hou, Chenlin; Zhang, Wenzheng; Wu, Shiqi; Yang, Yu; Tan, Mingyi; Zhang, Jie; Wei, Daqing; Guo, Chaowei; Zhang, Wei; Dong, Shun; Du, Shanyi; Han, Jiecai; Luo, Jian; Zhang, Xinghong
• Is Part Of: Advanced materials. Volume 34:Issue 31(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-07-01
• Subjects: isotropic materials -- nanostructured carbon -- plasticity -- polycrystalline graphite -- van der Waals materials; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.202200363
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract: Obtaining large plastic deformation in polycrystalline van der Waals (vdW) materials is challenging. Achieving such deformation is especially difficult in graphite because it is highly anisotropic. The development of sugar‐derived isotropic nanostructured polycrystalline graphite (SINPG) is discussed herein. The structure of this material preserves the high in‐plane rigidity and out‐of‐plane flexibility of graphene layers and enables prominent plasticity by activating the rotation of nanoscale (5–10 nm) grains. Thus, micrometer‐sized SINPG samples demonstrate enhanced compressive strengths of up to 3.0 GPa and plastic strains of 30–50%. These findings suggest a new pathway for enabling plastic deformation in otherwise brittle vdW materials. This new class of nanostructured carbon materials is suitable for use in a broad range of fields, from semiconductor to aerospace applications. Abstract : Sugar‐derived isotropic nanoscale polycrystalline graphite (SINPG) is prepared from colloidal organization of nanocapsules to nanograins by gel‐casting in a non‐pressure environment. SINPG exhibits ultrahigh strength, unprecedent plasticity, and excellent deformation, acting as a metallic material in compression tests. The cleavage associated with typical van der Waals materials is avoided with SINPG.