SGER: Nano-Mechanics of Biological Adhesion and Friction

SGER：生物粘附和粘附的纳米力学Abstract本提案的目的是探索生物有机体如壁虎和蟋蟀中发现的毛状和光滑的附着垫的基本机械原理。为了实现这一目标，该提案提出了一套定义明确的实验项目：量化纳米级石板头发样本森林的粘附行为作为配合表面粗糙度的函数;研究纳米级离散接触中的长度尺度效应，以了解纳米级在生物粘附中的相关性;量化毛状几何形状和材料特性对宏观摩擦的影响;并研究粗糙度引起的机械不稳定性在纳米尺度上对软材料分离的宏观功的作用。样品将通过微米和纳米纤维技术制备，并将使用原子力显微镜和具有专门设计的尖端的纳米压痕进行粘附和摩擦实验。毛发直径将在500 nm和50 nm之间变化。外联方案将包括支持一名女研究生，并邀请一名来自历史上黑人学院或大学的少数民族本科生参加拟议的研究。

SGER: Nano-Mechanics of Biological Adhesion and FrictionAbstractThe objectives of this proposal are to explore the fundamental mechanical principles of hairy and smooth attachment pads found in biological organisms such as geckos and crickets. In order to accomplish this goal, the proposal presents a set of well-defined experimental projects: quantify the adhesion behavior of a forest of nanoscale slated hair samples as a function of the mating surface roughness; investigate the length scale effects in discrete contact at nanoscale in order to understand the relevance of nanoscale in biological adhesion; quantify the effect of hairy geometry and material properties on macroscopic friction; and investigate the role of roughness induced mechanical instabilities at nanoscale on the macroscopic work of separation in soft materials. The samples will be prepared through micro and nanofabrication techniques and adhesion and friction experiments will be carried out using atomic force microscopy and nanoindentation with specially designed tips. The hair diameter will be varied between 500 nm and 50 nm. The outreach program will involve supporting a woman graduate student and inviting a minority undergraduate student from a Historically Black College or University to participate in the proposed research.