Zerze Gül H, Stillinger Frank H, Debenedetti Pablo G
Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States.
Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States.
J Phys Chem B. 2020 Jul 2;124(26):5362-5369. doi: 10.1021/acs.jpcb.0c02816. Epub 2020 Jun 19.
Single-stranded DNA chains enable postsynthesis sorting of single-walled carbon nanotubes (CNTs) according to their diameter and helicity by wrapping helically around CNT surfaces. Both DNA chains and CNTs in these CNT-DNA conjugates are intrinsically chiral. Using a single-stranded DNA chain in both of its chiral realizations, we systematically study cross-chiral interactions between DNA and CNTs by varying the helicity of CNTs within a relatively narrow range of diameters. We find that regardless of the helicity or handedness of the carbon nanotube, the chirality of DNA dictates the handedness of its predominant helical wrap around carbon nanotubes.
单链DNA链通过螺旋缠绕在单壁碳纳米管（CNT）表面，能够根据其直径和螺旋度对单壁碳纳米管进行合成后分类。这些CNT-DNA共轭物中的DNA链和CNT本身都是手性的。我们使用处于两种手性形式的单链DNA链，通过在相对较窄的直径范围内改变CNT的螺旋度，系统地研究了DNA与CNT之间的交叉手性相互作用。我们发现，无论碳纳米管的螺旋度或手性如何，DNA的手性决定了其在碳纳米管上主要螺旋缠绕的手性。
