1. State Key Laboratory of Bio-fibers and Eco-textilesShandong Collaborative Innovation Center of Marine Biobased Fibers and Ecological TextilesInstitute of Marine Biobased MaterialsSchool of Environmental Science and EngineeringQingdao University Qingdao 266071 P. R. China
2. International Research Center for Renewable EnergyState Key Laboratory of Multiphase Flow in Power EngineeringXi'an Jiaotong University Xi'an 710049 P. R. China
3. School of Chemical and Environmental EngineeringNorth University of China Taiyuan 030051 P. R. China
4. Analytical and Testing CentreSouth China University of Technology Guangzhou 510640 P. R. China
5. Research Center for X-ray Science & Department of PhysicsTamkang University Tamsui 25137 Taiwan
6. The Australian Centre for Microscopy & MicroanalysisThe University of Sydney Sydney New South Wales 2006 Australia
7. Nanoscale Physics Research LaboratorySchool of Physics and AstronomyUniversity of Birmingham Birmingham B15 2TT UK