Graphene Nanoparticle-Based, Nitrate Ion Sensor Characteristics

Abstract

Gathering and sensing of nitrate ions in the environment due to the abundant use in industry and agriculture have become an important problem, which needs to be overcome. On the other hand, new materials such as carbon-based materials with unique properties have become an ideal choice in sensing technology. In this research, the high-density polyethylene (HDPE) polymer as a carbon source in the melted form was used and carbon nanoparticles in the form of a strand between two electrodes were analyzed. It was fabricated between copper electrodes by the pulsed arc discharge method. Subsequently, the constructed metal–nanoparticle–metal (MNM) contact was employed to recognize the nitrate ions. Therefore, NaNO3, Pb(NO3)2, Zn(NO3)2, and NH4NO3 samples as a usual pollutant of industrial and agricultural wastewater were examined. All nitrate compounds in ten different densities were tested and sensor I-V characteristic was investigated, which showed that all the aforesaid compounds were recognizable by the graphene nano-strand. Additionally, the proposed structure in the presence of ions was simulated and acceptable agreement between them was reported. Additionally, the proposed structure analytically was investigated, and a comparison study between the proposed model and measured results was carried out and realistic agreement reported.

Highly Sensitive Graphene-Based Electrochemical Sensor for Nitrite Assay in Waters

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First Principal Simulation Study of Human Body Compatible Molecular Single Electron Transistors

“…Due to the increasing development of electronic equipment and being the incessant scaling down of device sizes, semiconductor devices are very close to their physical limits, there is an instantaneous need to develop next-generation technologies, in the designation of both device architecture and physics [1][2]. With the technology of getting smaller which confronts Moore's law i.e., the transistor poll on a chip multiplies at the rate of 2X per every 2 years [3], so nano electronic researchers are greatly keen on studying distinctive nanodevices like carbon nanotube/graphene tunnel field-effect transistors (FETs) and sensors [4][5][6][7][8], organic FETs [9][10], single-molecule devices [11][12], single-electron transistors (SETs) [13][14] and junction-less nanowire transistors [15][16].…”