Resiliency, morphology, and entropic transformations in high-entropy oxide nanoribbons

• 成果类型: Article
• 署名作者: Shahbazi, Hessam; Seraji, Pardis; Farraj, Husam; Yang, Taimin; Kim, Allen; Fattahpour, Seyyedfaridoddin; Papailias, Ilias; Diamond, Matthew; Namvar, Shahriar; Ahmadiparidari, Alireza; Wang, Shuxi; Liu, Zhenxian; Feng, Shihui; Kumar, Khagesh; Ahart, Muhtar; Cabana, Jordi; Kadkhodaei, Sara; Wang, Junlan; Huang, Zhehao; Hemley, Russell J.; Salehi-Khojin, Amin
• 署名单位: University of Illinois System; University of Illinois Chicago; University of Illinois Chicago Hospital; University of Illinois System; University of Illinois Chicago; University of Illinois Chicago Hospital; Stockholm University; University of Washington; University of Washington Seattle; University of Illinois System; University of Illinois Chicago; University of Illinois Chicago Hospital; Southern Methodist University; University of Illinois System; University of Illinois Chicago; University of Illinois Chicago Hospital; Xi'an Jiaotong University; South China University of Technology; University of Illinois System; University of Illinois Chicago; University of Illinois Chicago Hospital; United States Department of Energy (DOE); Argonne National Laboratory
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-11555
• DOI: 10.1126/science.adr5604
• 发表日期: 2025-05-29
• 页码: 950-956
• 关键词: total-energy calculations; carbon nanotubes; phase-transitions; youngs modulus; ultrasoft pseudopotentials; electron-diffraction; molecular-dynamics; thermal-stability; crystal-structure; oxidation-states

摘要

We present the successful synthesis and characterization of a one-dimensional high-entropy oxide (1D-HEO) exhibiting nanoribbon morphology. These 1D-HEO nanoribbons exhibit high structural stability at elevated temperatures (to 1000 degrees C), elevated pressures (to 12 gigapascals), and long exposure to harsh acid or base chemical environments. Moreover, they exhibit notable mechanical properties, with an excellent modulus of resilience reaching 40 megajoules per cubic meter. High-pressure experiments reveal an intriguing transformation of the 1D-HEO nanoribbons from orthorhombic to cubic structures at 15 gigapascals followed by the formation of fully amorphous HEOs above 30 gigapascals, which are recoverable to ambient conditions. These transformations introduce additional entropy (structural disorder) besides configurational entropy. This finding offers a way to create low-dimensional, resilient, and high-entropy materials.