1. Institute of Fundamental Sciences, Massey University, Palmerston North, New Zealand, MacDiarmid Institute for Nanotechnology and Advanced Materials, New Zealand, Fonterra Research Centre, Palmerston North, New Zealand, Unilever R&D Colworth, Sharnbrook, MK44 1LQ, Bedford, United Kingdom, and UR1268 Biopolymères Interactions Assemblages, INRA, F-44300 Nantes, France