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Keywords:

  • atomic force microscopy (AFM);
  • starch–iodine complex;
  • iodine vapor;
  • iodine adsorption

Summary

We explored the interaction of iodine with three crystalline type starches, corn, potato, and sweet potato starches using atomic force microscopy. Results revealed that starch molecules aggregated through interaction with iodine solution as well as iodine vapor. Detailed fine structures such as networks, chains, and super-helical structures were found in iodide solution tests. The nanostructures formed due to iodine adsorption could help to understand the formation and properties of the starch–iodine complex. SCANNING 36:394–400, 2014. © 2013 Wiley Periodicals, Inc.