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Nanoprocessing of layered crystalline materials by atomic force microscopy.

Miyake S, Wang M - Nanoscale Res Lett (2015)

Bottom Line: By taking advantage of the mechanical anisotropy of crystalline materials, processing at a single-layer level can be realized for layered crystalline materials with periodically weak bonds.Moreover, it is easy to image the atoms on the basal plane, where the processed shape can be observed on the atomic level.It also summarizes recent AFM results obtained by our research group regarding the atomic-scale mechanical processing of layered materials including mica, graphite, MoS2, and highly oriented pyrolytic graphite.

View Article: PubMed Central - PubMed

Affiliation: Department of Innovative System Engineering, Nippon Institute of Technology, Saitama, Japan.

ABSTRACT
By taking advantage of the mechanical anisotropy of crystalline materials, processing at a single-layer level can be realized for layered crystalline materials with periodically weak bonds. Mica (muscovite), graphite, molybdenum disulfide (MoS2), and boron nitride have layered structures, and there is little interaction between the cleavage planes existing in the basal planes of these materials. Moreover, it is easy to image the atoms on the basal plane, where the processed shape can be observed on the atomic level. This study reviews research evaluating the nanometer-scale wear and friction as well as the nanometer-scale mechanical processing of muscovite using atomic force microscopy (AFM). It also summarizes recent AFM results obtained by our research group regarding the atomic-scale mechanical processing of layered materials including mica, graphite, MoS2, and highly oriented pyrolytic graphite.

No MeSH data available.


Related in: MedlinePlus

Method for evaluating the nanoindentation hardness.
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Fig3: Method for evaluating the nanoindentation hardness.

Mentions: The nanoindentation properties of layered crystalline materials were evaluated by AFM to understand their physical characteristics at a near-atomic scale. To determine the hardnesses of the layered crystalline materials, nanoindentation tests were performed by indenting a diamond-type probe (r = 50 to 60 nm, cube corner: 90°) [25-27] into the specimen surfaces. The load applied during the experiments varied from 10 to 340 μN, and the loading and unloading times were 5 s [28]. The resulting load penetration depth gives insight into the response of the material to mechanical stress, from which parameters such as hardness can be determined. Figure 3 shows the evaluation method. The hardness was evaluated from the plastic deformation depth, which was determined from the point of intersection of the straight line fitted to the appropriate unloading curve and the x-axis, and is assumed to be equal to the contact depth.Figure 3


Nanoprocessing of layered crystalline materials by atomic force microscopy.

Miyake S, Wang M - Nanoscale Res Lett (2015)

Method for evaluating the nanoindentation hardness.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4385287&req=5

Fig3: Method for evaluating the nanoindentation hardness.
Mentions: The nanoindentation properties of layered crystalline materials were evaluated by AFM to understand their physical characteristics at a near-atomic scale. To determine the hardnesses of the layered crystalline materials, nanoindentation tests were performed by indenting a diamond-type probe (r = 50 to 60 nm, cube corner: 90°) [25-27] into the specimen surfaces. The load applied during the experiments varied from 10 to 340 μN, and the loading and unloading times were 5 s [28]. The resulting load penetration depth gives insight into the response of the material to mechanical stress, from which parameters such as hardness can be determined. Figure 3 shows the evaluation method. The hardness was evaluated from the plastic deformation depth, which was determined from the point of intersection of the straight line fitted to the appropriate unloading curve and the x-axis, and is assumed to be equal to the contact depth.Figure 3

Bottom Line: By taking advantage of the mechanical anisotropy of crystalline materials, processing at a single-layer level can be realized for layered crystalline materials with periodically weak bonds.Moreover, it is easy to image the atoms on the basal plane, where the processed shape can be observed on the atomic level.It also summarizes recent AFM results obtained by our research group regarding the atomic-scale mechanical processing of layered materials including mica, graphite, MoS2, and highly oriented pyrolytic graphite.

View Article: PubMed Central - PubMed

Affiliation: Department of Innovative System Engineering, Nippon Institute of Technology, Saitama, Japan.

ABSTRACT
By taking advantage of the mechanical anisotropy of crystalline materials, processing at a single-layer level can be realized for layered crystalline materials with periodically weak bonds. Mica (muscovite), graphite, molybdenum disulfide (MoS2), and boron nitride have layered structures, and there is little interaction between the cleavage planes existing in the basal planes of these materials. Moreover, it is easy to image the atoms on the basal plane, where the processed shape can be observed on the atomic level. This study reviews research evaluating the nanometer-scale wear and friction as well as the nanometer-scale mechanical processing of muscovite using atomic force microscopy (AFM). It also summarizes recent AFM results obtained by our research group regarding the atomic-scale mechanical processing of layered materials including mica, graphite, MoS2, and highly oriented pyrolytic graphite.

No MeSH data available.


Related in: MedlinePlus