Reduced graphene oxide–silicon interface involving direct Si–O bonding as a conductive and mechanical stable ohmic contact

2020 ◽  
Vol 56 (46) ◽  
pp. 6209-6212 ◽  
Author(s):  
Soraya Rahpeima ◽  
Essam M. Dief ◽  
Chandramalika R. Peiris ◽  
Stuart Ferrie ◽  
Alex Duan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Contact Resistance ◽  
Reduced Graphene Oxide ◽  
Ohmic Contact ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide ◽  
Silicon Interface

Electrochemically reduced graphene oxide, chemically bonded to silicon, lowers the contact resistance to metals and enables a tunable ohmic contact.

scholarly journals Application Of Carbon Nanotubes And Reduced Graphene Oxide Layers For Ohmic Contacts To p–GaN

2015 ◽  
Vol 66 (6) ◽  
pp. 344-347
Author(s):  
Jozef Liday ◽  
Peter Vogrinčič ◽  
Viliam Vretenár ◽  
Mário Kotlár ◽  
Marián Marton ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Carbon Nanotube ◽  
Contact Resistance ◽  
Visible Light ◽  
Reduced Graphene Oxide ◽  
Ohmic Contact ◽  
Ohmic Contacts ◽  
Spray Coating ◽  
Reduced Graphene

AbstractDue to their properties, carbon nanotubes and reduced graphene oxide are highly promising materials for obtaining low-resistance ohmic contacts to p-GaN with good optical transparency for visible light. In this contribution we designed a combination of these two materials, along with a cap layer, to be used as structures for ohmic contacts to p-GaN. Carbon nanotube (CNT) and graphene oxide (GO) layers were deposited by spray coating using an off-the-shelf airbrush on p-GaN layers. The metallic layers of Au/Pd were vapour deposited. The structures for ohmic contacts were prepared in two configurations, namely as Au/Pd/r-GO/CNT/p-GaN and Au/Pd/CNT/r-GO/CNT/p-GaN. The prepared structures provide a low resistivity ohmic contact after subsequent annealing in air ambient at 600 °C for 3 minutes. The contact containing the sandwich CNT/r-GO/CNT interstructure exhibits lower values of contact resistance in comparison with the r-GO/CNT interstructure.

scholarly journals Simultaneous Determination of Uric Acid and Xanthine Using a Poly(Methylene Blue) and Electrochemically Reduced Graphene Oxide Composite Film Modified Electrode

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Gen Liu ◽  
Wei Ma ◽  
Yan Luo ◽  
Deng-ming Sun ◽  
Shuang Shao
Keyword(s):  
Methylene Blue ◽  
Uric Acid ◽  
Graphene Oxide ◽  
Composite Film ◽  
Simultaneous Determination ◽  
Reduced Graphene Oxide ◽  
Modified Electrode ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide

Poly(methylene blue) and electrochemically reduced graphene oxide composite film modified electrode (PMB-ERGO/GCE) was successfully fabricated by electropolymerization and was used for simultaneous determination of uric acid (UA) and xanthine (Xa). Based on the excellent electrocatalytic activity of PMB-ERGO/GCE, the electrochemical behaviors of UA and Xa were studied by cyclic voltammetry (CV) and square wave voltammetry (SWV). Two anodic sensitive peaks at 0.630 V (versus Ag/AgCl) for UA and 1.006 V (versus Ag/AgCl) for Xa were given by CV in pH 3.0 phosphate buffer. The calibration curves for UA and Xa were obtained in the range of 8.00 × 10−8~4.00 × 10−4 M and 1.00 × 10−7~4.00 × 10−4 M, respectively, by SWV. The detection limits for UA and Xa were3.00×10-8 M and5.00×10-8 M, respectively. Finally, the proposed method was applied to simultaneously determine UA and Xa in human urine with good selectivity and high sensitivity.

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