| Автор | Tambe, Nikhil S |
| Автор | Bhushan, Bharat |
| Дата выпуска | 2005-10-01 |
| dc.description | The velocity dependence of nanoscale friction is studied for the first time over a wide range of velocities between 1 µm s<sup>−1</sup> and 10 mm s<sup>−1</sup> on large scan lengths of 2 and 25 µm. High sliding velocities are achieved by modifying an existing commercial atomic force microscope (AFM) setup with a custom calibrated nanopositioning piezo stage. The friction and adhesive force dependences on velocity are studied on four different sample surfaces, namely dry (unlubricated), hydrophilic Si(100); dry, partially hydrophobic diamond-like carbon (DLC); a partially hydrophobic self-assembled monolayer (SAM) of hexadecanethiol (HDT); and liquid perfluoropolyether lubricant, Z-15. The friction force values are seen to reverse beyond a certain critical velocity for all the sample surfaces studied. A comprehensive friction model is developed to explain the velocity dependence of nanoscale friction, taking into consideration the contributions of adhesion at the tip–sample interface, high impact velocity-related deformation at the contacting asperities and atomic scale stick–slip. A molecular spring model is used for explaining the velocity dependence of friction force for HDT. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Копирайт | IOP Publishing Ltd |
| Название | Friction model for the velocity dependence of nanoscale friction |
| Тип | paper |
| DOI | 10.1088/0957-4484/16/10/054 |
| Electronic ISSN | 1361-6528 |
| Print ISSN | 0957-4484 |
| Журнал | Nanotechnology |
| Том | 16 |
| Первая страница | 2309 |
| Последняя страница | 2324 |
| Аффилиация | Bhushan, Bharat; |
| Аффилиация | Tambe, Nikhil S; Nanotribology Laboratory for Information Storage and MEMS/NEMS, The Ohio State University, 650 Ackerman Road Suite 255, Columbus, OH 43202, USA |
| Выпуск | 10 |
