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南京航空航天大学 Nat. Commun. |集自清洁与辐射制冷于一体的智能热隐身衣

  • 2026-06-01 06:50:36
南京航空航天大学 Nat. Commun. |集自清洁与辐射制冷于一体的智能热隐身衣

第一作者:Hetao Guo

通信作者:Xiaolong Yang, Di Zhu

通讯作者单位:南京航空航天大学

导读

热隐身技术在军事伪装与工业热管理中至关重要,但传统低发射率涂层面临隐身与散热冲突的难题。以微纳结构为主的选择性发射器可实现非探测波段降温,但极易受尘埃污染,大规模、高精度制造工艺仍不成熟。本文利用飞秒激光直写技术,开发出一种具有分级结构(Co-A)的自清洁热隐身衣。该材料在微柱阵列顶部集成了亚波长天线,实现了5-8 μm 非大气窗口强辐射散热,使表观红外温度相比传统涂层降低77°C。凭借其大于140°的接触角,材料展现出卓越的自清洁能力,仅通过液滴滚动即可清除表面污染物并完全恢复隐身性能。

亮点剖析

一、“分级架构设计协同自清洁与光谱调控”

传统超疏水表面通常需要多孔或粗糙结构来实现自清洁,但这往往会引起红外辐射的随机散射与衍射,破坏热隐身的精度。研究人员通过跨尺度设计,将微观的光学调控与宏观的物理防护集成于一体。底层结构采用了深离子刻蚀技术制备的规整微柱阵列,其侧壁极其光滑,有效避免了无序辐射衍射对隐身性能的干扰,同时利用微柱间的间隙捕获空气,形成了稳定的支撑,使表面达到超疏水状态。在微柱顶端厚度约150 nm 的亚波长天线阵列通过局域表面等离激元共振效应精确控制热量的定向排放,实现了物理上的自清洁防护与光学上的选择性散热兼容。

图1 | 自清洁红外隐身示意图

二、“飞秒直写工艺实现精确裁剪”

制造亚微米级天线通常依赖电子束曝光,但其效率极低且成本高昂,难以实现大面积制备,且在非平面基底上加工困难。针对多层纳米薄膜(Pt/ZrO2/Pt)在复杂表面加工难的痛点,团队提出新的制造方案:将飞秒激光的光斑重叠率优化至0.7并配合0.9 nJ 的临界单脉冲能量,实现了对100 nm 厚顶层Pt膜的精确裁剪,且不会对下方的 ZrO2介质层造成热损伤。这种高精度的加工模式结合焦点实时跟踪系统,使隐身衣不仅能在平面基底上呈现,同时具备在不规则弯曲表面构筑亚微米天线阵列的潜力。

图2 | 通过飞秒激光直接创建Co-A架构

三、“全天候性能验证:卓越降温与环境稳健性”

传统热隐身结构一旦表面附着灰尘或污染物,其发射率会迅速升高,导致隐身功能彻底失效。该隐身衣通过天线激发的强辐射效应,使其在 5-8 μm 波段拥有接近 0.9 的超高发射率,在4 W/cm2加热条件下观红外温度比传统Cr涂层降低了77°C 。在抗污染测试中,面对高发射率粉尘,Co-A隐身衣凭借优异的自清洁能力实现了功能的恢复。此外,该材料在经历340 km/h高速热流冲刷、紫外照射及长达25小时的热循环后,依然保持了功能完好,为热隐身衣从实验室走向真实严苛环境提供了关键支撑 。

图3 | 高性能自清洁能力

思考与讨论

热隐身衣通过巧妙的分级设计,在不改变化学功能的前提下实现了散热性能的数量级提升解决了微纳器件易受污染而失效的共性难题 。其低能量飞秒激光加工方案配合多光束并行技术,具有在飞机蒙皮、大型电子舱室等大面积曲面上的应用前景。然而,若要走向全面商业化,仍需进一步验证材料在复杂腐蚀性气体环境下的长期服役寿命,并探索更具性价比的大规模薄膜沉积工艺。

【文章信息】

Guo, H., Li, W., Jing, L. et al. Self-cleaning hierarchical thermal cloak. Nat Commun 17, 2670 (2026).

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  1. CONNECT:[ UseTime:0.000464s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000584s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.026064s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.019083s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000786s ]
  6. SELECT * FROM `set` [ RunTime:0.003875s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000662s ]
  8. SELECT * FROM `article` WHERE `id` = 562473 LIMIT 1 [ RunTime:0.008063s ]
  9. UPDATE `article` SET `lasttime` = 1780561112 WHERE `id` = 562473 [ RunTime:0.014556s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.006512s ]
  11. SELECT * FROM `article` WHERE `id` < 562473 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.012851s ]
  12. SELECT * FROM `article` WHERE `id` > 562473 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.014642s ]
  13. SELECT * FROM `article` WHERE `id` < 562473 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.020937s ]
  14. SELECT * FROM `article` WHERE `id` < 562473 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.039701s ]
  15. SELECT * FROM `article` WHERE `id` < 562473 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.017319s ]
0.263925s