The state-of-the-art fundamentals and applications of micro-energy systems on-chipJianxin Xu, Shaohua Ma, Peng Gao, Yonggang Guo, Jianfeng Sun, Dayong Qiao, Binghe Ma, Weizheng Yuan, Seeram Ramakrishna and Tao YeNatl Sci Open, 4 2 (2025) 20240044DOI: https://doi.org/10.1360/nso/20240044