A team of researchers has developed a method to self-assemble complex shapes using single-stranded DNA tiles (SSTs). The SSTs are 42-base DNA strands composed entirely of concatenated sticky ends, which bind to four neighboring tiles during self-assembly. This approach allows for the creation of a wide range of two-dimensional and three-dimensional structures, including rectangles, tubes, and complex shapes. The researchers designed a molecular canvas using a self-assembled rectangle, where each SST strand acts as a pixel. By selecting the appropriate SST strands, they can produce desired shapes through one-pot annealing. The method was tested with a master strand collection corresponding to a 310-pixel canvas, resulting in the construction of 107 distinct and complex two-dimensional shapes. The SSTs were also used to create tubes with prescribed dimensions. The study demonstrated the robustness and modularity of the SST assembly method, which can be adapted to design various shapes and structures. The researchers also explored the use of the molecular canvas to construct arbitrary shapes, including triangles and other complex forms. The study highlights the potential of SST assembly for creating nanostructures with prescribed shapes using short synthetic DNA strands. The method was validated through various imaging techniques, including AFM and TEM, which confirmed the successful formation of the desired structures. The study also discussed the challenges and limitations of the SST method, including the fragility of the structures and the need for further modifications to enable larger-scale assembly. Overall, the study demonstrates the versatility and effectiveness of the SST method for creating complex molecular shapes through self-assembly.A team of researchers has developed a method to self-assemble complex shapes using single-stranded DNA tiles (SSTs). The SSTs are 42-base DNA strands composed entirely of concatenated sticky ends, which bind to four neighboring tiles during self-assembly. This approach allows for the creation of a wide range of two-dimensional and three-dimensional structures, including rectangles, tubes, and complex shapes. The researchers designed a molecular canvas using a self-assembled rectangle, where each SST strand acts as a pixel. By selecting the appropriate SST strands, they can produce desired shapes through one-pot annealing. The method was tested with a master strand collection corresponding to a 310-pixel canvas, resulting in the construction of 107 distinct and complex two-dimensional shapes. The SSTs were also used to create tubes with prescribed dimensions. The study demonstrated the robustness and modularity of the SST assembly method, which can be adapted to design various shapes and structures. The researchers also explored the use of the molecular canvas to construct arbitrary shapes, including triangles and other complex forms. The study highlights the potential of SST assembly for creating nanostructures with prescribed shapes using short synthetic DNA strands. The method was validated through various imaging techniques, including AFM and TEM, which confirmed the successful formation of the desired structures. The study also discussed the challenges and limitations of the SST method, including the fragility of the structures and the need for further modifications to enable larger-scale assembly. Overall, the study demonstrates the versatility and effectiveness of the SST method for creating complex molecular shapes through self-assembly.