@article{ART003342727},
author={Anil Pasupuleti and Arun B. and Saidulu Banothu and Raju K.C. James and Ravi Kanth Kumar V. V.},
title={Nitrogen-doped defect-induced dipolar polarisation in CNZF/NrGO/MWCNT nanocomposites for X & Ku-band microwave absorption},
journal={Carbon Letters},
issn={1976-4251},
year={2026},
volume={36},
number={2},
pages={907-935},
doi={10.1007/s42823-026-01039-0}
TY - JOUR
AU - Anil Pasupuleti
AU - Arun B.
AU - Saidulu Banothu
AU - Raju K.C. James
AU - Ravi Kanth Kumar V. V.
TI - Nitrogen-doped defect-induced dipolar polarisation in CNZF/NrGO/MWCNT nanocomposites for X & Ku-band microwave absorption
JO - Carbon Letters
PY - 2026
VL - 36
IS - 2
PB - Korean Carbon Society
SP - 907
EP - 935
SN - 1976-4251
AB - Heteroatom nitrogen-doped defect engineering is considered an effective strategy for enhancing the microwave absorption performance of carbon-based hybrid materials. The focus of present work is to study the electromagnetic absorption properties of as-prepared Co0.1Ni0.4Zn0.5Fe2O4/NrGO/MWCNT (CNZF/NrGO/MWCNT) nanocomposites that could be facilely modulated by changing the doping nitrogen contents to create the defect-induced polarisations which can be utilised as a promising candidates for microwave absorption materials (MAMs) for high-frequencies. Moreover, CNZF/NrGO/MWCNT nanocomposites are designed using a facile one-pot solvothermal method by varying nitrogen-doped content and configuration. It was found that the optimisation between pyrrolic-N and graphitic-N, rather than total nitrogen content unlike earlier reports, plays a decisive role in regulating the electron magnetic properties. The micromorphological analysis reveals the presence of interfacial defects within the as-prepared samples, which are beneficial for electromagnetic attenuation. The optimally nitrogen-doped CNZF/NrGO/MWCNT composite (S2), prepared using ethylenediamine (EDA=2 ml), exhibits the balanced dielectric magnetic loss behaviour and enhanced interfacial polarisation, exhibited superior microwave absorption performance, achieving a minimum reflection loss (RLmin) of -56.39 dB at 13.05 GHz with a thickness of 1.5 mm and a maximum effective absorption bandwidth (EABmax) of 4.21 GHz in Ku band. Thus, this work provides a scalable and cost-effective method through defect engineering for designing an efficient MAMs for high-frequency applications.
KW - Spinel ferrite Nitrogen-doped reduced graphene oxide Nanocomposites Interfacial polarisation Impedance matching Microwave absorption properties Multi-walled carbon nanotubes
DO - 10.1007/s42823-026-01039-0
ER -
Anil Pasupuleti, Arun B., Saidulu Banothu, Raju K.C. James and Ravi Kanth Kumar V. V.. (2026). Nitrogen-doped defect-induced dipolar polarisation in CNZF/NrGO/MWCNT nanocomposites for X & Ku-band microwave absorption. Carbon Letters, 36(2), 907-935.
Anil Pasupuleti, Arun B., Saidulu Banothu, Raju K.C. James and Ravi Kanth Kumar V. V.. 2026, "Nitrogen-doped defect-induced dipolar polarisation in CNZF/NrGO/MWCNT nanocomposites for X & Ku-band microwave absorption", Carbon Letters, vol.36, no.2 pp.907-935. Available from: doi:10.1007/s42823-026-01039-0
Anil Pasupuleti, Arun B., Saidulu Banothu, Raju K.C. James, Ravi Kanth Kumar V. V. "Nitrogen-doped defect-induced dipolar polarisation in CNZF/NrGO/MWCNT nanocomposites for X & Ku-band microwave absorption" Carbon Letters 36.2 pp.907-935 (2026) : 907.
Anil Pasupuleti, Arun B., Saidulu Banothu, Raju K.C. James, Ravi Kanth Kumar V. V.. Nitrogen-doped defect-induced dipolar polarisation in CNZF/NrGO/MWCNT nanocomposites for X & Ku-band microwave absorption. 2026; 36(2), 907-935. Available from: doi:10.1007/s42823-026-01039-0
Anil Pasupuleti, Arun B., Saidulu Banothu, Raju K.C. James and Ravi Kanth Kumar V. V.. "Nitrogen-doped defect-induced dipolar polarisation in CNZF/NrGO/MWCNT nanocomposites for X & Ku-band microwave absorption" Carbon Letters 36, no.2 (2026) : 907-935.doi: 10.1007/s42823-026-01039-0
Anil Pasupuleti; Arun B.; Saidulu Banothu; Raju K.C. James; Ravi Kanth Kumar V. V.. Nitrogen-doped defect-induced dipolar polarisation in CNZF/NrGO/MWCNT nanocomposites for X & Ku-band microwave absorption. Carbon Letters, 36(2), 907-935. doi: 10.1007/s42823-026-01039-0
Anil Pasupuleti; Arun B.; Saidulu Banothu; Raju K.C. James; Ravi Kanth Kumar V. V.. Nitrogen-doped defect-induced dipolar polarisation in CNZF/NrGO/MWCNT nanocomposites for X & Ku-band microwave absorption. Carbon Letters. 2026; 36(2) 907-935. doi: 10.1007/s42823-026-01039-0
Anil Pasupuleti, Arun B., Saidulu Banothu, Raju K.C. James, Ravi Kanth Kumar V. V.. Nitrogen-doped defect-induced dipolar polarisation in CNZF/NrGO/MWCNT nanocomposites for X & Ku-band microwave absorption. 2026; 36(2), 907-935. Available from: doi:10.1007/s42823-026-01039-0
Anil Pasupuleti, Arun B., Saidulu Banothu, Raju K.C. James and Ravi Kanth Kumar V. V.. "Nitrogen-doped defect-induced dipolar polarisation in CNZF/NrGO/MWCNT nanocomposites for X & Ku-band microwave absorption" Carbon Letters 36, no.2 (2026) : 907-935.doi: 10.1007/s42823-026-01039-0
