1. Beijing Advanced Innovation Center for Soft Matter Science and Engineering; Beijing University of Chemical Technology; Beijing 100029 China
2. Department of Chemical Engineering; Waterloo Institute for Nanotechnology; University of Waterloo; Waterloo Ontario Canada
3. Institute of Food Science and Technology; Chinese Academy of Agricultural Sciences; Beijing 100193 China
4. State Key Laboratory of Organic-Inorganic Composites; Beijing University of Chemical Technology; Beijing 100029 China
5. Polymer Science and Engineering Department; University of Massachusetts; Amherst MA 01003 USA
6. Materials Sciences Division; Lawrence Berkeley National Laboratory; 1 Cyclotron Road Berkeley CA 94720 USA