Free-Standing Graphene Oxide and Carbon Nanotube Hybrid Papers with Enhanced Electrical and Mechanical Performance and Their Synergy in Polymer Laminates

Abstract

Hybrid nanomaterials fabricated by the heterogeneous integration of 1D (carbon nanotubes) and 2D (graphene oxide) nanomaterials showed synergy in electrical and mechanical properties. Here, we reported the infiltration of carboxylic functionalized single-walled carbon nanotubes (C-SWNT) into free-standing graphene oxide (GO) paper for better electrical and mechanical properties than native GO. The stacking arrangement of GO sheets and its alteration in the presence of C-SWNT were comprehensively explored through scanning electron microscopy, X-ray photoelectron spectroscopy (XPS) and X-ray diffraction. The C-SWNTs bridges between different GO sheets produce a pathway for the flow of electrical charges and provide a tougher hybrid system. The nanoscopic surface potential map reveals a higher work function of the individual functionalised SWNTs than surrounded GO sheets showing efficient charge exchange. We observed the enhanced conductivity up to 50 times and capacitance up to 3.5 times of the hybrid structure than the GO-paper. The laminate of polystyrene composites provided higher elastic modulus and mechanical strength when hybrid paper is used, thus paving the way for the exploitation of hybrid filler formulation in designing polymer composites.

Selection of Highly Specific DNA Aptamer for the Development of QCM‐Based Arsenic Sensor

“…On the other hand, GO prevents nanotube aggregation as electrostatic and steric repulsive forces can suppress van der Walls interactions. Hence, rGO and CNT nanocomposites show excellent dispersion and inhibit aggregation [38] …”

“…Hence, rGO and CNT nanocomposites show excellent dispersion and inhibit aggregation. [38] Thoroughly covered gold chips must be used in determining the binding affinity assays and sensor development to eliminate non-specific interactions of gold with metal ions. [14,39] QCM is a highly sensitive mass-based technique; hence a significant mass change in the sensor surface would provide a readable and concrete signal.…”

Synergistic Strengthening in Graphene Oxide and Oxidized Single‐walled Carbon Nanotube Hybrid Material for use as Electrolytes in Proton Exchange Membrane Fuel Cells

“…In the case of 3DGO‐CNT, the higher proton conductivity is related to the alteration of the interlayer space following the incorporation of CNT. This results in water retention capacity being increased and the enhancement in proton conductivity and PEMFC performance originates from the construction of continuous proton conduction routes by the presence of the dispersed oxidized carbon nanotubes inside the GO layers and the formation of hydrogen bonded networks between the GO and CNTOX [43] . Moreover, for 3DGO‐CNTOX, the enhancement in the proton conductivity is related to both the higher surface area and higher porosity present in this species.…”

Oxygenated Hydrocarbons from Catalytic Hydrogenation of Carbon Dioxide

“…In this procedure, the deposition of iron (catalyst layer) and alumina (buffer layer) was achieved to coat the graphene in sequence by electron beam (e-beam) evaporation after graphene was first produced on the Cu foil. It should also be noted that hybrid graphene-CNT ohmic-linked carpets possess a high surface area without sacrificing their standalone features [42].…”