1. State Key Laboratory of Pulp and Paper Engineering South China University of Technology Wushan Road 381 Guangzhou 510640 China
2. Department of Electrical and Computer Engineering University of Wisconsin–Madison 1415 Engineering Drive, 3445 Engineering Hall Madison WI 53706 USA
3. School of Chemistry and Chemical Engineering South China University of Technology Wushan Road 381 Guangzhou 510640 China
4. Wisconsin Institute for Discovery University of Wisconsin–Madison 330 N Orchard Street Madison WI 53715 USA