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Side‐Chain‐Directed Dispersion of MoS 2 Nanosheets by V‐Shaped Polyaromatic Compounds
Author(s) -
Matsumoto Atsushi,
Jono Keisuke,
Akita Munetaka,
Yoshizawa Michito
Publication year - 2017
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201701199
Subject(s) - molybdenum disulfide , dispersant , sonication , side chain , ionic bonding , dispersion (optics) , chemical engineering , materials science , chemistry , nanotechnology , organic chemistry , polymer , ion , composite material , physics , optics , engineering
Abstract Bulk molybdenum disulfide (MoS 2 ) itself is virtually insoluble in common organic solvents because of the tight stacks of multiple MoS 2 nanosheets. Here we report that V‐shaped polyaromatic compounds with non‐ionic side chains can efficiently exfoliate and disperse the inorganic nanosheets. Simple grinding and sonication (less than total 1 h) of MoS 2 powder with the V‐shaped compounds gave rise to large MoS 2 nanosheets highly dispersed in NMP through efficient host‐guest S–π interactions. DLS and AFM analyses revealed that the lateral sizes (ca. 150–270 nm) and thicknesses (ca. 2–8 nm) of the products depend on the identity of the non‐ionic side chains on the V‐shaped dispersant.