The cover highlights an array of 3D-printed porous microneedles, fabricated by two-photon polymerization as described in the article number 2300161 by Esraa Fakeih, Khaled N. Salama, and co-workers. Due to their multiple pores, these microneedles can deliver fluids to large areas while still preserving their mechanical stability. These porous microneedles can be used in healthcare applications, such as transdermal drug delivery and interstitial fluid extraction.

中文翻译：

---

用于增强流体注射和抽吸的多孔微针的制造和表征：双光子聚合方法

封面突出显示了一系列 3D 打印的多孔微针，这些微针是通过双光子聚合制造的，如 Esraa Fakeih、Khaled N. Salama 及其同事在文章编号 2300161 中所述。由于具有多个孔隙，这些微针可以将液体输送到大面积，同时仍保持其机械稳定性。这些多孔微针可用于医疗保健应用，例如透皮药物输送和组织液提取。