Journal
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
Volume 262, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.mseb.2020.114730
Keywords
Multiwalled carbon nanotubes; Chemical modification; Electrochemical behavior; Mott-Schottky analysis; Electrical conductivity; Magnetic properties
Funding
- DST Nano mission, New Delhi, India [SR/NM/NS-1212/2013]
- Central Instrument Facility, IIT (BHU)
- Banaras Hindu University for accomplishing electrochemical studies of materials
Ask authors/readers for more resources
An electrical conducting and magnetic nanomaterial, [Ni(II)Hyd]-MWCNTs was synthesized via chemical modification of carboxylated MWCNTs (A-MWCNTs). The synthesized material has been studied by FTIR, UV-Visible, XPS, Raman, TGA, powder XRD, TEM and EDAX analysis. Double probe DC conductivity suggested enhanced electrical conductivity of [Ni(II)Hyd]-MWCNTs compared to A-MWCNTs. (R(s)Q(RctO)) is found to be best fit Randle's equivalent circuit. The positive slope obtained from Mott-Schottky plot suggested n-type semiconducting behavior of materials. The positive shift in flat-band potential for [Ni(II)Hyd]-MWCNTs is the signature of its more conducting nature than that of A-MWCNTs. The better conductivity of [Ni(II)Hyd]MWCNTs is also confirmed by optical and electrochemical band gap studies. The field and temperature dependent magnetization revealed intrinsic ferromagnetism in [Ni(II)Hyd]-MWCNTs with enhanced saturation magnetization, remanent magnetization and coercivity values compared to A-MWCNTs. Hence, high electrical conductivity and magnetic properties prompt the [Ni(II)Hyd]-MWCNTs for applicability in spin-based electronic devices and in other application such as EMI shielding, metamaterials, drug delivery, anticorrosion, etc.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available