@article{Hou2023, 
author = {Zhi-Ling Hou and Kunrong Du and Yiqin Zhang and Song Bi and Junying Zhang},
title = {Nanoarchitectonics of MnO2 nanotubes as sea urchin-like aggregates for dielectric response and microwave absorption with a wide concentration domain},
year = {2023},
journal = {Nano Research},
volume = {16},
number = {2},
pages = {2604-2610},
keywords = {broadband microwave absorption, MnO2 nanotubes, sea urchin-like aggregates, wide filling range},
url = {https://www.sciopen.com/article/10.1007/s12274-022-5099-3},
doi = {10.1007/s12274-022-5099-3},
abstract = {Designing highly reliable and practical microwave absorbers is one of the most important research directions in the microwave absorbing field. Many absorbents suffer from concentration-sensitivity and environmental-sensitivity dilemmas in practical applications. Here, sea urchin-like aggregates of MnO2 nanotubes were synthesized by a simple hydrothermal method, which exhibit an outstanding impedance matching characteristic. The composites based on sea urchin-like aggregates of MnO2 nanotubes show excellent microwave absorption performance in a wide concentration domain from 20 wt.% to 70 wt.%, corresponding to electrical conductivities from 1.86 × 10−7 to 1.85 × 10−5 S/m. Such a wide concentration range of absorbent for excellent microwave absorption is mainly attributed to the beneficial impedance matching properties of sea urchin-like aggregates of hollow nanotubes. A competitive absorption bandwidth of 3.36 GHz is achieved at 1 mm thickness, which can be broadened to 13.4 GHz by structural design. This work shows a new scheme for designing reliable and practical microwave absorbers benefit from the wide absorbent concentration domain.}
}