香港大学研究团队发现，超薄柔性钻石薄膜具有显著的压电效应，这一发现推翻了自20世纪初以来关于钻石为非压电材料的百年科学认知 1。由电气与计算机工程系教授朱志钦和机械工程系教授林渊主导的研究团队，采用边缘剥离法制造了可弯曲的多晶钻石薄膜，并通过机械循环实验验证了其稳定的压电响应 1。
钻石薄膜在弯曲时能产生稳定的压电响应信号，这是由于其晶界处的不对称性在受力时产生电荷极化，从而形成电势差 1。这一发现为钻石在自供电医疗植入物、微型能量系统和传感器等领域的应用开辟了新的可能性 1。研究成果已发表于《科学进展》期刊，论文发表于2026年12月（第12卷第12期），数字标识符为10.1126/sciadv.aea8318 1。
Researchers at the University of Hong Kong have challenged a century-old scientific principle by demonstrating that ultrathin diamond films possess significant piezoelectric properties.1 The discovery overturns the long-held classification of diamonds as non-piezoelectric materials, a designation that has persisted since the early 20th century.1 Led by Professor Chu Chi-chin from the Department of Electrical and Computer Engineering and Professor Lam Yuen from the Department of Mechanical Engineering, the team developed flexible polycrystalline diamond films using an edge-exfoliation method and validated their stable piezoelectric response through mechanical cycling experiments.1
The piezoelectric effect in diamond films emerges from the asymmetry at grain boundaries within the material, which generates charge polarization and electric potential differences when the film is bent.1 These findings open new pathways for diamond applications in self-powered medical implants, miniature energy systems, and sensors.1 The research was published in Science Advances in December 2026 (Volume 12, Issue 12) with the DOI 10.1126/sciadv.aea8318.1
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