SGER: Nano-Mechanics of Biological Adhesion and Friction

SGER：生物粘附和摩擦的纳米力学

• 批准号: 0519430
• 负责人: Pradeep Guduru
• 金额: $ 5万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-03-15 至 2006-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0519430&HistoricalAwards=false
• 关键词: SGER; Nano; Mechanics; Biological; Adhesion

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.

这项研究的目的是探索在壁虎和蟋蟀等生物体内发现的毛茸茸的光滑附着垫的基本力学原理。为了实现这一目标，该提案提出了一系列明确的实验项目：量化纳米级板状毛发样本森林的附着行为作为配对表面粗糙度的函数；在纳米尺度上调查离散接触中的长度尺度效应，以了解纳米尺度在生物附着中的相关性；量化毛发几何形状和材料特性对宏观摩擦的影响；以及研究纳米尺度下粗糙导致的机械不稳定性对软材料中宏观分离功的作用。样品将通过微和纳米制造技术制备，粘着和摩擦实验将使用原子力显微镜和具有特殊设计的尖端的纳米压痕进行。头发直径将在500纳米到50纳米之间变化。外展计划将包括支持一名女性研究生，并邀请一名来自历史悠久的黑人学院或大学的少数族裔本科生参与拟议的研究。