Sustainable Products, Projects and Green Design Bionic Photosynthetic Curtain by Sean Wei-Zhe Lin Bionic Photosynthetic is a curtain wall that performs artificial photosynthesis. The design imitates the roots, stems, veins and leaf tissue of plants. The veins that carry water are 3D printed inside the frame. These channels supply water for photosynthesis and remove the liquid produced afterwards. The frame holds three layers: a tempered glass cover, a middle cell frame and a lower plate. Artificial cells in the middle layer hold chloroplasts inside bio-membranes. Sunlight and carbon dioxide enter the cells, and oxygen is released to the air.