Preparation method and application of single emulsifier and double emulsion based on DNA triangular origami technology

A single emulsifier based on DNA triangular origami technology, wherein the single emulsifier is DNA triangular origami prepared by modifying cholesterol onto DNA staple strands and then synthesizing with a DNA scaffold strand, the cholesterol being modified onto 3′ ends of the DNA staple strands;

• and the DNA triangular origami has a central nano hole, both of the DNA triangular origami and the central nano hole are equilateral triangles, and a number of cholesterol-modified DNA staple strands in each block unit of the DNA triangular origami is 15;
• wherein the cholesterol-modified DNA staple strands consist of SEQ ID NO.2, SEQ ID NO.5, SEQ ID NO.6, SEQ ID NO.10, SEQ ID NO.13, SEQ ID NO.18, SEQ ID NO.19, SEQ ID NO.20, SEQ ID NO.24, SEQ ID NO.31, SEQ ID NO.36, SEQ ID NO.43, SEQ ID NO.47, SEQ ID NO.54, SEQ ID NO.57, SEQ ID NO.62, SEQ ID NO.63, SEQ ID NO.65, SEQ ID NO.66, SEQ ID NO.67, SEQ ID NO.68, SEQ ID NO.72, SEQ ID NO.77, SEQ ID NO.78, SEQ ID NO.82, SEQ ID NO.83, SEQ ID NO.87, SEQ ID NO.97, SEQ ID NO.99, SEQ ID NO.105, SEQ ID NO.111, SEQ ID NO.112, SEQ ID NO.116, SEQ ID NO.119, SEQ ID NO.126, SEQ ID NO.129, SEQ ID NO.135, SEQ ID NO.136, SEQ ID NO.139, SEQ ID NO.141, SEQ ID NO.142, SEQ ID NO.145, SEQ ID NO.149 and SEQ ID NO.155.