Xiang-Yun Lu, Lan Chen, Chuan-Yu Wu, Hak-Kim Chan and Tim Freeman

1 School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology,

Shanghai 200093, China; nephelelu@hotmail.com

2 Freeman Technology Ltd., Tewkesbury GL20 8DN, UK; tim.freeman@freemantech.co.uk

3 Deprtment of Chemical & Process Engineering, University of Surrey, Guildford GU2 7XH, UK;

c.y.wu@surrey.ac.uk

4 Advanced Drug Delivery Group, Faculty of Pharmacy, The University of Sydney, Sydney, NSW 2006,

Australia; kim.chan@sydney.edu.au