3.2.2. SEM-EDX

Elemental analysis indicates the presence of elemental sodium in SDS/TPGS stabilized NCC. The OPT-NCC have lower oxygen content when compared to uncoated NCC and the overall weight ratio is lower due to the presence of elemental sodium and high sulphur content from the combination of stabilizers used. A summary of the EDX measurements is listed in Table 9 and depicted in Figure 5.

**Table 9.** Summary of elemental analysis for the physical mixture, NCC-OPT and co-crystal.


**Figure 5.** Elemental analysis of uncoated (black) and OPT-NCC (orange).
