1. State Key Laboratory of Medicinal Chemical BiologyKey Laboratory of Functional Polymer Materials of Ministry of EducationCollege of ChemistryNankai University Tianjin 300071 China
2. Laboratory of Neuro‐OncologyTianjin Neurological InstituteDepartment of NeurosurgeryTianjin Medical University General Hospital Tianjin 300052 China
3. Key Laboratory of Neurotrauma, Variation and RegenerationMinistry of Education and Tianjin Municipal Government Tianjin 300052 China
4. National Institute for Advanced MaterialsSchool of Material Science and EngineeringNankai University Tianjin 300350 China
5. Department of Chemical and Biomolecular EngineeringUniversity of California Los Angeles CA 90095 USA