Abstract Rapid production of nanoscale-textured surfaces for microscale devices is important for commercial applications. In this study, we introduce a commercially viable method to fabricate nanotextured surfaces used in pool-boiling heat-transfer applications. Silver nanowires were supersonically sprayed onto copper substrates with good adhesive strength. The coating method required little time and could be adapted for roll-to-roll processing. The fabricated nanotextured surfaces showed a significantly increased critical heat flux (CHF) and effective heat transfer coefficient (heff), as evidenced by the release of numerous bubbles from nanotextured nucleation sites during pool-boiling. The silver nanowires were well connected either by self-sintering or due to the fusion induced by supersonic impacts with the copper substrate. The thickness of the coated layer could be controlled by the number of spray sweeps/passes and the optimal thickness for maximizing CHF and heff was identified. The nanotextured surfaces were characterized by scanning electron microscopy and by bubble formation and release as visualized with a charge-coupled device camera.

中文翻译：

---

用银纳米线超声喷涂纳米纹理表面以增强池沸腾

摘要 用于微型器件的纳米级纹理表面的快速生产对于商业应用很重要。在这项研究中，我们介绍了一种商业上可行的方法来制造用于水池沸腾传热应用的纳米纹理表面。将银纳米线超声喷涂到具有良好粘合强度的铜基材上。涂层方法需要的时间很少，并且可以适用于卷对卷加工。制造的纳米纹理表面显示出显着增加的临界热通量 (CHF) 和有效传热系数 (heff)，这可以通过在池沸腾过程中从纳米纹理成核位点释放大量气泡来证明。银纳米线通过自烧结或由于与铜基板的超音速撞击引起的融合而连接良好。涂层的厚度可以通过喷雾扫描/通过的次数来控制，并且确定了最大化 CHF 和 heff 的最佳厚度。纳米纹理表面的特征是通过扫描电子显微镜和气泡形成和释放，如用电荷耦合器件相机所观察到的。