All carbon non-covalent exohedral hybrids:C60 aggregates on nanotube networks

作     者：Evgenee Yekymov Celine Bounioux Racheli Itzhak-Cohen Leila Zeiri Emil Shahnazaryan Eugene A.Katz Rachel Yerushalmi-Rozen 

作者机构：Department of Chemical Engineeringthe Ben-Curion University of the NegevBeer-ShevaIsrael The Ilse Katz Institute for Nanoscience and Technologythe Ben-Gurion University of the NegevBeer-ShevaIsrael Department of Solar Energy and Envirornental PhysicsJacob Blaustein Institute of Desert ResearchBen-Garion University of the NegevSde-Boker CampusMidreshet Ben-GurionIsrael 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2018年第27卷第4期

页      面：957-961页

核心收录：

学科分类：0820[工学-石油与天然气工程] 0710[理学-生物学] 0808[工学-电气工程] 081704[工学-应用化学] 07[理学] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 0827[工学-核科学与技术] 071007[理学-遗传学] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：the support of the Israel Science Foundation grant number 72/14 

主　　题：Fullerenes Exohedral hybrids Carbon-nanotubes 

摘      要：Exohedral van der Waals （vdW） hybrids comprising pristine carbon nanotubes （CNTs） and C60 fullerenes are expected to enable the engineering of carbonaceous materials with tunable physical and chemical properties due to the unperturbed sp2 hybridization of the comprising allotropes. In spite of theoretical predictions, experimental realization of exohedral non-covalent hybridization of unmodified C60 fullerenes and CNTs was not reported before, probably due to the relatively strong inter-fullerene and inter-tube interactions that drive the system toward phase separation and the formation of fullerene crystals and CNTs bundles. Here we describe a two-step process for preparation of C60-CNTs hybrids. The first step is based on solution-assembly of random, 3D-networks of individual, pristine CNTs followed by fast solvent-quenching. In the second step sublimated fullerenes are deposited onto the pre-assembled networks where structural defects serve as nucleation points for fullerite nanocrystals. Annealing at low temperature （80 ℃） results in re-organization of the C6o nanocrystals into nanometric layers, forming a CNT-C6o core-shell like cylindrical hybrids. Raman characterization and the observed high mobility of the fullerenes at the CNT surface support the assumption that the exohedral hybrids are of vdW type. The approach presented here offers a pathway for preparation of exohedral hybrids with controlled nano- morphology： CNTs-networks decorated by nanometric C60 crystals and CNTs-3D-networks coated by a shell of non-covalently bonded mono- or multi-layers of C60 molecules that may serve to shape the nanomorphology of the active layer in polymer-fullerene bulk-heterojunction solar cells.