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<p>Cross-band camouflage technology is a critical necessity, enabling personnel and equipment to evade detection across evolving surveillance systems, thereby enhancing survivability and mission success. Herein, this work develops a layer-structured composite system based on carbon nanotube (CNT) film comprising ionic liquid (IL) interlayer for infrared (IR) modulation and surface-engineered Cu<sub>2</sub>O nanoparticles for visible camouflage. The CNT/IL/CNT architecture enables reversible IR emissivity switching (Δε≈0.55) through electrically driven ion intercalation/deintercalation within 2&#xa0;s, while spray-coated Cu<sub>2</sub>O nanoparticles (100 ~ 400&#xa0;nm diameter) on the top CNT film layer generate rich structure colors with 90% IR transmittance. This spectral-decoupling design overcomes the traditional trade-off between color visibility and IR transmittance observed in pigment-based systems. Remarkably, due to physical interface coupling, the Cu<sub>2</sub>O-coated layer-structured system maintains exceptional electrical conductivity, enabling simultaneous electromagnetic interference shielding and electrothermal energy conversion. The integrated system demonstrates long-term operational stability. By unifying visible-IR camouflage, electromagnetic protection, and energy management in a lightweight platform, this work provides an important paradigm for cross-band camouflage technologies .</p>

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A Multi-Scale Cross-Band Defense System Integrating Decoupled Visible, Dynamic Infrared Camouflage and Electromagnetic Shielding

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年1月13日

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  • Junlin Liu,
  • Shujuan Tan,
  • Xinrui Yang,
  • Jiajie Zhu,
  • Xin Yan,
  • Tianyu Chen,
  • Guangbin Ji

摘要

Cross-band camouflage technology is a critical necessity, enabling personnel and equipment to evade detection across evolving surveillance systems, thereby enhancing survivability and mission success. Herein, this work develops a layer-structured composite system based on carbon nanotube (CNT) film comprising ionic liquid (IL) interlayer for infrared (IR) modulation and surface-engineered Cu2O nanoparticles for visible camouflage. The CNT/IL/CNT architecture enables reversible IR emissivity switching (Δε≈0.55) through electrically driven ion intercalation/deintercalation within 2 s, while spray-coated Cu2O nanoparticles (100 ~ 400 nm diameter) on the top CNT film layer generate rich structure colors with 90% IR transmittance. This spectral-decoupling design overcomes the traditional trade-off between color visibility and IR transmittance observed in pigment-based systems. Remarkably, due to physical interface coupling, the Cu2O-coated layer-structured system maintains exceptional electrical conductivity, enabling simultaneous electromagnetic interference shielding and electrothermal energy conversion. The integrated system demonstrates long-term operational stability. By unifying visible-IR camouflage, electromagnetic protection, and energy management in a lightweight platform, this work provides an important paradigm for cross-band camouflage technologies .