نوع مقاله : مقاله پژوهشی
1 استاد دانشگاه علم و صنعت- گروه مکانیک
2 مهندسی مکانیک، دانشگاه اراک، اراک
3 دانشجوی دکتری، مهندسی مکانیک، دانشگاه علم و صنعت، تهران
4 گروه مکانیک-دانشکده مهندسی مکانیک -دانشگاه تربیت مدرس-تهران-ایران
عنوان مقاله [English]
Different definitions of nano-technology prove this truth that nano-technology includes wide range of various scientific fields. In fact, nano-technology is an interdisciplinary science and a new approach to the all domains. In Nanomanipulation process by utilizing Atomic Force Microscope, contact models play important role for determining critical force and time which constituent the first phase of this process. In current study, two contact stages in Nanomanipulation of gold cylindrical micro/nano particles are investigated. First stage is the contact of micro/nanoparticles and substrate and the second one is the contact between cantilever tip and micro/nanoparticles. For the first stage, five significant contact models including Hertz, Lundeberg, Dawson, Nikpour and Heoprich have been used. Also in the second stage, contact models of Hertz and JKR have been applied. Dawson model predicts maximum and Nikpour model predicts the least amounts of deformation and penetration depth for the contact of the first stage of deformation between substrate and gold cylindrical micro/nanoparticles. Also the deformation between cylindrical particles and spherical tip apex has the minimum amount in Hertz model and the highest amount of deformation and penetration depth have been showed in JKR model due to regarding adhesion forces. Generally, the results indicate increasing the angle of tip apex along the z axis leads to decrease of penetration depth and the amount of deformation between particles and substrate which Lundeberg model has been demonstrated the least amount and Nikpour model has been showed the highest amount of decrease.