Indentation analysis of nano-particle using nano-contact mechanics models during nano-manipulation based on atomic force microscopy

Korayem, Moharam Habibnejad

doi:10.1007/s11051-010-0096-y

Cited by 39 publications

(17 citation statements)

References 14 publications

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“…Contact mechanics theories provide a basis for such a framework. These theories suggest that pull‐off force is proportional to adhesion energy ( w = γ PROBE + γ MATERIAL − γ PROBE‐MATERIAL , where γ PROBE — surface energy of probe material, γ MATERIAL — surface energy of sample material, and γ PROBE‐MATERIAL — interfacial energy of sample material and probe material) and adjusted probe radius ( R ):

F_{PULL} = (5 / 6 t o 2) w R

…”

Section: Resultsmentioning

confidence: 99%

Improved conductive atomic force microscopy measurements on organic photovoltaic materials via mitigation of contact area uncertainty

Nikiforov

Darling

2012

Progress in Photovoltaics

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Physical processes that lead to conversion of light into electrical energy inside photovoltaic devices happen at the nanoscale. Therefore, understanding of electrical properties of photovoltaic materials at this length scale is of paramount importance for improvement of device performance. In this paper, we describe and validate a new framework for high‐resolution quantitative measurements of electrical and mechanical properties of compliant materials with sub‐100‐nm resolution. Previous approaches have generally suffered from uncertainty in the quantitative level of contact between the probe and the material being measured; the methodology presented here overcomes this obstacle. We use the broadly studied ITO/PEDOT:PSS/P3HT:PC61BM system as an example to illustrate variability of chemical composition and electrical properties of the active layer at hundred‐nanometers and micrometer length scales. Copyright © 2012 John Wiley & Sons, Ltd.

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F_{PULL} = (5 / 6 t o 2) w R

…”

Section: Resultsmentioning

confidence: 99%

Improved conductive atomic force microscopy measurements on organic photovoltaic materials via mitigation of contact area uncertainty

Nikiforov

Darling

2012

Progress in Photovoltaics

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“…The above-mentioned results indicated that wear of AFM tips on the mica substrates resulted in larger tip radius that provided a higher affinity (Boer-Duchemin et al, 2010;Daeinabi and Korayem, 2011;Korayem and Zakeri, 2011;Rao et al, 2009;Wang et al, 2008) to the DNA molecules to be picked up from surfaces. The increase of the tip radius after tip wear was proved by scanning electronic microscope (SEM) images (Fig.…”

Section: Discussionmentioning

confidence: 96%

“…Both methods would increase the radius of AFM tips, which is believed to result in a higher affinity (Boer-Duchemin et al, 2010;Daeinabi and Korayem, 2011;Korayem and Zakeri, 2011;Rao et al, 2009;Ternes et al, 2008;Wang et al, 2008) to the nanoobjects to be picked up. However, in the case of chemical coating, the coated AFM tip was easily damaged and the sample would be contaminated because AFM tip applied a relatively large force on the sample during nano-objects picking up operation.…”

Section: Introductionmentioning

confidence: 99%

Facilitating the pickup of individual DNA molecules by AFM nanomanipulation with tips mechanically worn on bare mica

Duan

Long

Wang

et al. 2011

Microscopy Res & Technique

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The tip is one of the critical factors to improve the efficiency in picking up individual DNA molecules from solid substrates based on atomic force microscope (AFM) nanomanipulation. We found that wearing AFM tips on certain solid substrates in advance to nanomanipulation operation would largely improve the pickup efficiency, which was ascribed to the increasing affinity of the tip to the DNA molecules along with the increase of the tip radius after wearing. It was demonstrated that bare mica was superior to APTES-modified mica to keep the tip clean while wearing, which was crucial for DNA pickup during AFM nanomanipulation.

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“…Finally, to determine the maximum indentation depth of the whole circular crowned roller, first, the force applied on the cylindrical portion is calculated by using Eq. (11), and then by considering the length of the cylindrical portion in the circular crowned roller section, the maximum deformation values of the circular crowned roller will be obtained by applying the cylindrical contact theories…”

Section: Development Of Spherical and Cylindrical Contact Theoriementioning

confidence: 99%

“…Finally, they employed these contact models to simulate the indentation depth and the contact radius of the nanoparticle in contact with a cantilever and substrate. 11 Korayem et al dynamically modeled the manipulation of spherical yeast particles based on the atomic force microscope. They considered a set of sphere-shaped yeasts and simulated the manipulation process in the liquid environments of ethanol, methanol, and blood.…”

mentioning

confidence: 99%

Modeling of contact theories for the manipulation of biological micro/nanoparticles in the form of circular crowned rollers based on the atomic force microscope

Korayem

Khaksar

Taheri

2013

Journal of Applied Physics

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Articles you may be interested inDiagonal control design for atomic force microscope piezoelectric tube nanopositioners Rev. Sci. Instrum. 84, 023705 (2013); 10.1063/1.4790474Numerical simulations of electrostatic interactions between an atomic force microscopy tip and a dielectric sample in presence of buried nano-particles A control approach to cross-coupling compensation of piezotube scanners in tapping-mode atomic force microscope imaging Rev. Sci. Instrum. 80, 043709 (2009); This article has dealt with the development and modeling of various contact theories for biological nanoparticles shaped as cylinders and circular crowned rollers for application in the manipulation of different biological micro/nanoparticles based on Atomic Force Microscope. First, the effective contact forces were simulated, and their impact on contact mechanics simulation was investigated. In the next step, the Hertz contact model was simulated and compared for gold and DNA nanoparticles with the three types of spherical, cylindrical, and circular crowned roller type contact geometries. Then by reducing the length of the cylindrical section in the circular crowned roller geometry, the geometry of the body was made to approach that of a sphere, and the results were compared for DNA nanoparticles. To anticipatory validate the developed theories, the results of the cylindrical and the circular crowned roller contacts were compared with the results of the existing spherical contact simulations. Following the development of these contact models for the manipulation of various biological micro/nanoparticles, the cylindrical and the circular crowned roller type contact theories were modeled based on the theories of Lundberg, Dowson, Nikpur, Heoprich, and Hertz for the manipulation of biological micro/nanoparticles. Then, for a more accurate validation, the results obtained from the simulations were compared with those obtained by the finite element method and with the experimental results available in previous articles. The previous research works on the simulation of nanomanipulation have mainly investigated the contact theories used in the manipulation of spherical micro/nanoparticles. However since in real biomanipulation situations, biological micro/nanoparticles of more complex shapes need to be displaced in biological environments, this article therefore has modeled and compared, for the first time, different contact theories for use in the biomanipulation of cylindrical and circular crowned roller shaped micro/nanoparticles. The results of models indicate that the contact model of Hertz achieves the largest amount of deformation for the DNA nanoparticle in cylindrical form and the contact model of Heoprich achieves the largest deformation for the circular crowned roller shaped DNA. Of course, this finding is not always true for the other nanoparticles; and considering the mechanical and environmental characteristics, different results can be obtained. Also, by comparing the deformations of different types of nanoparticles, it was dete...

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Indentation analysis of nano-particle using nano-contact mechanics models during nano-manipulation based on atomic force microscopy

Cited by 39 publications

References 14 publications

Improved conductive atomic force microscopy measurements on organic photovoltaic materials via mitigation of contact area uncertainty

Improved conductive atomic force microscopy measurements on organic photovoltaic materials via mitigation of contact area uncertainty

Facilitating the pickup of individual DNA molecules by AFM nanomanipulation with tips mechanically worn on bare mica

Modeling of contact theories for the manipulation of biological micro/nanoparticles in the form of circular crowned rollers based on the atomic force microscope

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