Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Computer-aided design of nano-filter construction using DNA self-assembly | Nanoscale Res Lett 2007 2 24-27 DOI S11671-006-9024-6 NANO IDEAS Computer-aided design of nano-filter construction using DNA self-assembly Reza Mohammadzadegan Hassan Mohabatkar Published online 9 November 2006 to the authors 2006 Abstract Computer-aided design plays a fundamental role in both top-down and bottom-up nano-system fabrication. This paper presents a bottom-up nanofilter patterning process based on DNA self-assembly. In this study we designed a new method to construct fully designed nano-filters with the pores between 5 nm and 9 nm in diameter. Our calculations illustrated that by constructing such a nano-filter we would be able to separate many molecules. Keywords Computer-aided design Nano-filter DNA Self-assembly Introduction Since the introduction of the idea that nucleic acids could be used to synthesize nanoscale grids and lattice structures the development of DNA Deoxyribonucleic acid self-assembly into a practical method for creating nanoscale circuit patterns has garnered increasing support 1-3 . However the exotic nature of DNA self-assembly as compared to conventional photolithography introduces new challenges for system designers and Computer-aided design CAD tool makers. Electronic Supplementary Material Supplementary material is available to authorised users in the online version of this article at http s11671-006-9024-6 R. Mohammadzadegan El H. Mohabatkar Department of Biology College of Sciences Shiraz University Shiraz Iran e-mail admin@ Clean water and environment are the most critical aspects of human life. Human kind is exposed to pathogenic bacteria and viruses. These bacteria and viruses are present all around the world. The bacterial length varies from 1 I to 20 . Where as viruses are smaller their length vary from 30 nm to I 4 . The ability of filtering environment is very important in epidemiological disasters. Additionally in engines clean oil is vital to keep them running properly.