1. School of Chemistry and Chemical Engineering State Key Laboratory for Metal Matrix Composite Materials Shanghai Jiao Tong University Shanghai 200240 China
2. Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
3. State Key Laboratory of Mechanical Systems and Vibration School of Mechanical Engineering Shanghai Jiao Tong University Shanghai 200240 China
4. Polymer Science and Engineering Department University of Massachusetts Amherst MA 01003 USA