Electrical and magnetic performances of semiconductor based carbon nanoparticles

The temperature-dependent resistivity, room temperature electron field emission, and magnetic performance within the temperature range of 2-300 K of previously chemically synthesized pure carbon nanoparticles (CNPs) from candle soot having particle sizes of approximate to 2-6 nm have been studied. The highest saturation magnetization and coercivity of approximate to 8.9 x 10(-2) emu/g and approximate to 130.8 Oe were obtained at 2 and 4 K, respectively. We also determined that the turn-on electric field is approximate to 27 V/mu m with a current density of approximate to 0.8 x 10(-8) A/cm(2) @ 20 V/mu m. The temperature vs electrical resistivity and applied high electric field (EA) vs electron emission show the tunneling from one conductive sp(2) C=C cluster to another separated by an sp2 C=C cluster (and/or an insulating sp(3) C-C cluster). The magnetic, as well as the electric, field emission results imply that CNPs could be useful for the fabrication of spintronic as well as field-emission display devices. (c) 2023 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).