graphene – Page 8 – TechConnect Briefs

The Effect of Thermal Annealing Processes on Graphene

Kumar K., Kim Y-S, Li X., Tian Y., Pallikaras A., Yang E.H., Stevens Institute of Technology, US

We demonstrate the impact of PMMA removal from CVD graphene by annealing in H2/Ar and ambient atmospheres as well as under vacuum on the Raman spectra and AFM topography of graphene. We find a broad [...]

Graphene/PDMS composites for optical heating on microfluidic chips

Tao C., Lv Y., Liu H., Hu Z., Zhu H., Wang J., National University of Defense Technology, CN

Microfluidic chips have attracted extensive attention from both industrial and academic communities due to its virtues of miniaturization, integration, automation. Nowadays, simple and economical means of photothermal conversion on microfluidic chips are strongly desired.In this [...]

Fabrication and Characterization of 3-D Graphene-CNT Architectures Towards Supercapacitor Applications

Kim Y-S, Kumar K., Li X., Fisher F.T., Yang E.H., Stevens Institute of Technology, US

This work describes the first steps towards fabrication and characterization of a novel hybrid nanostructure comprised of carbon nanotubes (CNTs) grown out-of-plane from graphene layers for supercapacitor applications. Graphene is a promising material for supercapacitors, [...]

Storage capacity in Graphene and blends of Graphene EDLC

Subramaniam C.K., Boopalan G., Velayutham G., Bollepalli S., VIT University, IN

EDLC’s Electrochemical Double Layer Capacitor form excellent energy storage device for high power applications with added advantage of avoidance of electrolyte leaks, improved reliability and packaging to suit different applications, when we use a solid [...]

Gold Nanoparticles Encapsulated within Graphene Shells

Shi W., Chopra N., The University of Alabama, US

We report here a novel approach to fabricate graphene shell encapsulated Au nanoparticles in a chemical vapor deposition process. In addition, processing parameters were studied to result in best quality non-turbostratic graphene shells. This system [...]

Facile Preparation of Graphene Composite Materials and Their Application

Nishina Y., Okayama University, JP

We have successfully achieved the new preparation technique of graphene oxide from graphite with “Rapid Hummers method”. The graphene oxide was functionalized by selective reduction of C-O bonds and by making composites with metal nanoparticles, [...]

Computer Simulations and Experimental Study of Graphane-Like Materials Produced by Electrolytic Hydrogenation

Ilyin A.M., Nemkaeva R.R., Guseinov N.R., Tsyganov I.A., Beall G.W., Kazakh National University, KZ

Graphane and graphane-like materials in spite of their recent origin [1,2] are objects of great interest for many researchers, because of very wide field of their potential applicability: hydrogen energetic, electronics, materials science etc. The [...]

Mechanical fabrication of graphene devices using focused-ion beam: deposition and milling

Lei N., Chen Z., Kim D., Xue W., Xu J., Xue W., Washington State University, US

The inherent difficulties in handling and producing graphene have been a major barrier in developing such devices. Conventional microfabrication methods are mostly based on chemical etching processes, which often involve tedious masking and aligning steps. [...]

On the Possibility of Ultra-Low Power Switching in Multilayer Graphene Nanostructures

Dellabetta B., Shumway J., Gilbert M.J., University of Illinois, US

A particularly attractive way to solve the power consumption problem in next generation logic devices is by harnessing collective motion of electrons. While collective phenomena are normally found at low temperatures, recent work suggests it [...]

Inherently Radiation Hardened Electronics: A Examination of III-V Nanowire Transistors and Spin-Based Logic Devices

Telesca D., Air Force Research Lab (AFRL), US

This work will present two avenues currently being pursued for inherently radiation hardened electronics. It will examine the current development of III-V all-around gate oxide nano-wire transistors. The carriers in these nanowires have dramatically increased [...]