Maximum allowable load of atomic force microscope (AFM) nanorobot

2014

Robotica

Self Cite

SUMMARYNowadays, with the growing use of atomic force microscope (AFM) nanorobots in the fabrication of nanostructures, research in this area has proliferated. A major limiting factor in the utilization of AFM nanorobots is the lack of real-time monitoring. Computer simulations have been widely used to improve the feasibility of nanoparticles pushing by means of the AFM-based nanorobots. In order to prevent damage to a cantilever during the nanoparticle displacement, it is necessary to come up with an algorithm that can check the feasibility of the manipulation operation with regards to the geometrical constraints of the cantilever and the considered path. The existing models for predicting the feasibility of manipulation processes are limited to 2D manipulation models (spherical nanoparticles), which are incapable of predicting the feasibility of 3D operations (lack of a comprehensive model of 3D cases). In this paper, to predict the feasibility of displacing cylindrical nanoparticles and to consider the path of motion (rough surface), a model has been proposed that can ensure the feasibility of the manipulation operation in advance. Finite element simulation has been employed to obtain the maximum load that can be withstood by a cantilever of a specific geometry. Also, the effect of surface roughness on the critical manipulation force has been explored. Ultimately, an algorithm has been presented for determining the feasibility of the manipulation operation by considering the particle motion path and the cantilever geometry.

Section: Geometrical Specifications Of Cantilevermentioning

confidence: 99%

Section: Effect Of Cantilever Geometrymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Algorithm for determining the cantilever load carrying capacity in the 3D manipulation of nanoparticles with geometrical constraints based on FEM simulations

Hoshiar

2014

Robotica

Self Cite

“…Same as what had been focused in (Deng et al, ), dynamic behavior of sub‐systems of SPMs have been studied. In some works (Korayem et al, ; Korayem and Zakeri ; Moradi et al, ) such models have been used for analyzing the sensitivity, load‐carrying capacity, and dynamics of certain objects during manipulation. Since the dynamics of an ordinary robot are totally different from nanorobot dynamics, recently, some works (Korayem et al, a,b; Mahboobi et al, ; Mahboobi et al, a,b) have suggested using the molecular dynamics method for a better investigation of the dynamics of these devices, and have employed this method for the analysis of manipulation works.…”

Section: Introductionmentioning

confidence: 99%

Effects of damping and stiffness of AFM cantilever on the imaging of fine surfaces

Sadeghzadeh

2016

Microsc. Res. Tech.

In this paper, by applying the differential quadrature (DQ) method, a semi analytical model has been developed for atomic force microscope cantilever, and then by using the interfacial forces between the cantilever tip and imaged surfaces, a 2D model has been extracted for imaging nano-sized fine samples. By employing the present model, several simple and standard samples have been imaged, and finally the effects of the microcantilever's structural damping and its stiffness on the imaging results have been investigated. It has been observed that, through the control of damping, the quality of the acquired images is considerably improved. It has also been shown that the self-softening and self-hardening properties of cantilever have serious effects on the obtained images. The present model can be used to study the effects of different parameters on the process of imaging small-scale samples. Also, as one of its most important applications, this model can be used in common multiscale models for simulating and predicting the effects of large and small fields on each other.

“…They explored the changes of force and time needed in the manipulation with respect to different parameters of the problem [9]. Moreover, the maximum size of spherical particles that can be displaced by controlled pushing has been investigated [10]. A review of theoretical and experimental nanomanipulation works has been presented by Du in which all the tools and methods of nanomanipulation have been examined [11].…”

Section: Introductionmentioning

confidence: 99%

Dynamic modeling and simulation of cylindrical nanoparticles in liquid medium

Int J Adv Manuf Technol

Hoshiar

Kordi

2014

Self Cite

In view of the extensive applications of the AFM nanorobot in the displacement of nanoparticles, this research has focused on the kinematics and dynamics of cylindrical nanoparticles in liquid environments. Since a manipulation process cannot be simultaneously observed while it is being performed, the use of computer modeling and simulation for performing a more precise manipulation operation has become of interest. In this paper, a model has been presented for the displacement of cylindrical nanoparticles in liquid medium. The major difference between modeling in the air medium and modeling in the liquid medium is due to the emergence of surface tension and drag forces and also the change of the adhesion coefficient of contact surfaces in liquid environments. In this article, the movement of cylindrical nanoparticles in liquid medium has been simulated threedimensionally. This simulation process has initially focused on kinematics, and the effective parameters in liquid medium have been used in the modeling. Then, the dynamic forces have been determined by means of the relevant free-body diagrams, and the changes of these dynamic forces during the manipulation process have been illustrated. Finally, different parameters that influence the process have been investigated. To validate the obtained results, first, by reducing the liquid medium parameters, the presented simulations have been compared with the results of manipulation in air, and then by reducing the effects of 3D (cylindrical) parameters, the obtained results have been compared with the existing results for the 2D (disk) model. Through the analysis of forces, the presented simulations make it possible to precisely move and displace various nanoparticles in a liquid environment.