Ultrathin polymer membranes with locked intrinsic microporosity for hydrocarbon fractionation - Adam Oxley; Chunchun Ye; Seok Ju Han; Guoke Zhao; Yihao Guo; Xin Shi; Jie Liu; Keenan Smith; Mona Sarter; Lakshmeesha Upadhyaya; Shanshan Hong; Vasilios G. Samaras; et al. (Science, 2026)