1 research outputs found
Highly Ordered and Multiple-Responsive Graphene Oxide/Azoimidazolium Surfactant Intercalation Hybrids: A Versatile Control Platform
To produce graphene
materials with better controllability, a new
graphene oxide (GO) intercalation hybrid is fabricated with the incorporation
and functionalization with the azoimidazolium (AzoIm<sup>+</sup>)
surfactant. The hybrid exhibits a highly uniform lamellar structure
in which a few layers of GO are stacked with AzoIm<sup>+</sup> alternatively. Simultaneous control of the mesoscopic structures, aggregation
properties, and electrochemical behavior of the hybrid is achieved
by inheriting the photo, thermal, and mechanical responsiveness of
azoimidazolium. Ultraviolet (UV) treatment produces a well-dispersed
GO/AzoIm<sup>+</sup> suspension aggregate and a precipitate, whereas
the specific capacitance of the final hybrid decreases. The lamellar
stacking becomes anisotropic by uniaxial stretching on a soft polymer.
With a liquid crystal unit inserted between the layers, the <i>d</i> spacing of the lamella passes through transformation,
disordering, and finally recovery stages, associated with the increasing
and decreasing temperature. The explosive release of heat generated
by the thermal reduction of GO is reduced in the GO/AzoIm<sup>+</sup> intercalation hybrid. The release of heat is tunable by varying
the relative quantity and UV treatment of AzoIm<sup>+</sup>. The physical
properties of the hybrid allow the controlled preparation of ultrasmall
Au nanodots between the GO layers. This represents a major step toward
multiple-responsive integrated graphene applications