Abstract
Reduced graphene oxide–carbon nanotube (RGO–CNT) hybrid materials were prepared by a simple catalyst-free route. The thermostability, photoluminescence (PL) and electrical properties of RGO–CNTs were investigated systematically. The results revealed that compared to RGO, RGO–CNTs showed multicolor PL, and higher thermostability and conductivity. The RGO–CNTs therefore have important potential applications in the fields of photonic and electrical devices.
Highlights
The need for improved thermal interface materials (TIMs) in modern electronics and optoelectronics stimulated interest in carbon materials as fillers for TIMs
It reveals a considerable growth of carbon nanotubes (CNTs) on or between the RGO layers, and the CNTs are relatively uniform with a diameter of ca. 10–30 nm
Reduced graphene oxide–carbon nanotube (RGO–CNT) have high thermostability, which is proportionate to the content of CNTs
Summary
The need for improved thermal interface materials (TIMs) in modern electronics and optoelectronics stimulated interest in carbon materials as fillers for TIMs. To efficiently establish synergistic effects between these two different graphitic nanostructures, much attempt has been made to explore graphene and CNT hybrid materials (G–CNTs) in recent years [6,7,8,9,10,11]. Kim et al [18] fabricated G–CNT transparent 2-dimensional optical array and researched its holographic property. Dong et al [19] synthesized highly conductive G–CNTs using copper as catalyst under ethanol. We synthesized reduced graphene oxide–CNT hybrid materials (RGO–CNTs) by a facile and catalyst-free route, and found that the weight ratio of CNTs to RGO can be adjusted in a relatively wide range of 0.33 to 7.039 by regulating the annealing temperature [20]. Compared to RGO, RGO–CNTs possess obvious multicolor PL, and higher thermostability and conductivity
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