Frontispiece: Tumor-Microenvironment-Induced Degradation of Ultrathin Gadolinium Oxide Nanoscrolls for Magnetic-Resonance-Imaging-Monitored, Activatable Cancer Chemotherapy

Miaomiao Wu

Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054 China

These authors contributed equally to this work.

Yumeng Xue

Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054 China

These authors contributed equally to this work.

Na Li

Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054 China

Hongyang Zhao

Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054 China

Corresponding Author

Prof. Bo Lei

• [email protected]

Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054 China

Min Wang

Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054 China

Jianwei Wang

Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054 China

Meng Luo

Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054 China

Chao Zhang

Tianjin Key Lab for Rare Earth Materials and Applications, Centre for Rare Earth and Inorganic Functional Materials, School of Materials Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin, 300350 China

Corresponding Author

Prof. Yaping Du

• [email protected]

• orcid.org/0000-0002-9937-2087

Tianjin Key Lab for Rare Earth Materials and Applications, Centre for Rare Earth and Inorganic Functional Materials, School of Materials Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin, 300350 China

Prof. Chunhua Yan

Tianjin Key Lab for Rare Earth Materials and Applications, Centre for Rare Earth and Inorganic Functional Materials, School of Materials Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin, 300350 China

Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, PKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871 China

College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000 China