pH-sensitive tunable thermochromic hydrogel with carbon quantum dots for smart windows Sai Zhong, Yuxuan Xue, Kuanwen Wang, Haoyang Li, Yanghua Lu, Zhenqian Pang, Tengyao Jiang and Gang Tan Natl Sci Open, 3 3 (2024) 20230071 Published online: 12 March 2024 DOI: 10.1360/nso/20230071