Romio Martina, Mesa Camillo La
Dept. of Chemistry, La Sapienza University, P.le A. Moro 5, 00185, Rome, Italy.
Dept. of Chemistry, La Sapienza University, P.le A. Moro 5, 00185, Rome, Italy.
Colloids Surf B Biointerfaces. 2017 Apr 1;152:12-17. doi: 10.1016/j.colsurfb.2016.12.011. Epub 2016 Dec 24.
Multi-walled carbon nanotubes, MWCNTs, are stabilized thanks to the surface wrapping of single-strand DNA, ss-DNA; the resulting adducts are kinetically and thermodynamically stable Such entities build up nano-hybrids with titania, TiO, nano-particles, in presence of surfactant as an adjuvant. The conditions leading to TiO adsorption onto ss-DNA/CNTs were investigated, by optimizing the concentration of adducts, nano-particles (NPs), and of the cationic surfactant (CTAB). Controlling the working conditions makes possible to get homogeneously organized hybrids. Characterization by DLS, electro-phoretic mobility, SEM and AFM clarified the surfactant-assisted association modes between adducts and CTAB-functionalized TiO. Nano-particles' clustering onto DNA-wrapped adducts gives hybrids trough electrostatic interactions. Surface coverage by TiO is significant and homogeneous. It is expected that the reported hybrids can be useful for applications in heterogeneous catalysis.
多壁碳纳米管（MWCNTs）由于单链DNA（ss-DNA）的表面包裹而得以稳定；形成的加合物在动力学和热力学上都是稳定的。在表面活性剂作为助剂的情况下，这些实体与二氧化钛（TiO）纳米颗粒形成纳米杂化物。通过优化加合物、纳米颗粒（NPs）和阳离子表面活性剂（CTAB）的浓度，研究了导致TiO吸附到ss-DNA/CNTs上的条件。控制工作条件使得获得均匀组织的杂化物成为可能。通过动态光散射（DLS）、电泳迁移率、扫描电子显微镜（SEM）和原子力显微镜（AFM）进行的表征阐明了加合物与CTAB功能化TiO之间的表面活性剂辅助缔合模式。纳米颗粒在DNA包裹的加合物上聚集，通过静电相互作用形成杂化物。TiO的表面覆盖显著且均匀。预计所报道的杂化物可用于多相催化应用。
