论文标题

通过自动贝叶斯优化的抗菌活性表面的计算设计

Computational design of antimicrobial active surfaces via automated Bayesian optimization

论文作者

Zhai, Hanfeng, Yeo, Jingjie

论文摘要

生物膜为海洋科学,生物能源和生物医学等各种领域的工程师带来了重大问题,在那里有效的生物膜控制是一个长期目标。生物膜的粘附和表面力学在产生和去除生物膜中起着至关重要的作用。设计具有不同表面拓扑的定制纳米曲面可以改变粘合剂特性,以更容易地清除生物膜,从而大大改善长期生物膜控制。为了快速设计此类拓扑结构,我们采用基于个体的建模和贝叶斯优化来自动化设计过程并生成不同的主动表面以有效地去除生物膜。我们的框架通过施加的剪切和振动成功地生成了理想的纳米曲面,以去除生物膜。密集分布的短柱形地形是防止生物膜形成的最佳几何形状。在液体剪切下,最佳地形是稀疏分布高,纤细的柱状结构。当受到垂直或横向振动的影响时,发现厚梯形锥是最佳的。优化振动载荷表明频率相对较低的振动幅度在去除生物膜方面更有效。我们的结果为需要表面介导的生物膜控制的各种工程领域提供了见解。我们的框架也可以应用于更通用的材料设计和优化。

Biofilms pose significant problems for engineers in diverse fields, such as marine science, bioenergy, and biomedicine, where effective biofilm control is a long-term goal. The adhesion and surface mechanics of biofilms play crucial roles in generating and removing biofilm. Designing customized nano-surfaces with different surface topologies can alter the adhesive properties to remove biofilms more easily and greatly improve long-term biofilm control. To rapidly design such topologies, we employ individual-based modeling and Bayesian optimization to automate the design process and generate different active surfaces for effective biofilm removal. Our framework successfully generated ideal nano-surfaces for biofilm removal through applied shear and vibration. Densely distributed short pillar topography is the optimal geometry to prevent biofilm formation. Under fluidic shearing, the optimal topography is to sparsely distribute tall, slim, pillar-like structures. When subjected to either vertical or lateral vibrations, thick trapezoidal cones are found to be optimal. Optimizing the vibrational loading indicates a small vibration magnitude with relatively low frequencies is more efficient in removing biofilm. Our results provide insights into various engineering fields that require surface-mediated biofilm control. Our framework can also be applied to more general materials design and optimization.

扫码加入交流群

加入微信交流群

微信交流群二维码

扫码加入学术交流群,获取更多资源