Cellulose nanofiber based films with oriented, spiky ball-chain and cocoa-tree gradient heterostructures for electromagnetic interference shielding, thermal management, and sensing - Gengmei Liu; Jinbao Li; Dingwen Yin; Huijuan Xiu; Yuxin Qin; Xia Wang; Mengxia Shen (Carbohydrate Polymers, 2026)