 Solution

ID: past-exam-of-the-mphil-in-micro-and-nanotechnology-enterprise-course-of-the-university-of-cambridge/2023/paper-1/section-b/10/i/b/solution

CNS-DDA contains an amide linkage,

surface - C (O) - NH - C_{12} H_{25}

. The amine nitrogen becomes bonded to the surface carbonyl carbon.

CNS-EG contains an ester linkage,

surface - C (O) - O - C H_{2} C H_{2} OH

. One alcohol group forms the ester while the other remains an outer hydroxyl group. The latter is not an ether linkage at the surface carbonyl.

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