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Friction-induced nanofabrication method to produce protrusive nanostructures on quartz.

Song C, Li X, Yu B, Dong H, Qian L, Zhou Z - Nanoscale Res Lett (2011)

Bottom Line: The height of these nanostructures increases with the increase of the number of scratching cycles or the normal load.Further analysis reveals that during scratching, a contact pressure ranged from 0.4Py to Py (Py is the critical yield pressure of quartz) is apt to produce protuberant nanostructures on quartz under the given experimental conditions.Finally, it is of great interest to find that the protrusive nanostructures can be selectively dissolved in 20% KOH solution.

View Article: PubMed Central - HTML - PubMed

Affiliation: Tribology Research Institute, National Traction Power Laboratory, Southwest Jiaotong University, Chengdu, Sichuan Province 610031, People's Republic of China. linmao@swjtu.edu.cn.

ABSTRACT
In this paper, a new friction-induced nanofabrication method is presented to fabricate protrusive nanostructures on quartz surfaces through scratching a diamond tip under given normal loads. The nanostructures, such as nanodots, nanolines, surface mesas and nanowords, can be produced on the target surface by programming the tip traces according to the demanded patterns. The height of these nanostructures increases with the increase of the number of scratching cycles or the normal load. Transmission electron microscope observations indicated that the lattice distortion and dislocations induced by the mechanical interaction may have played a dominating role in the formation of the protrusive nanostructures on quartz surfaces. Further analysis reveals that during scratching, a contact pressure ranged from 0.4Py to Py (Py is the critical yield pressure of quartz) is apt to produce protuberant nanostructures on quartz under the given experimental conditions. Finally, it is of great interest to find that the protrusive nanostructures can be selectively dissolved in 20% KOH solution. Since the nanowords can be easily 'written' by friction-induced fabrication and 'erased' through selective etching on a quartz surface, this friction-induced method opens up new opportunities for future nanofabrication.

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Related in: MedlinePlus

Critical contact stress for the fabrication of friction-induced hillock. AFM images (top) and cross-sectional profiles (bottom) of the friction-induced nanolines on quartz surface created by 30 scratching cycles at a displacement amplitude D of 200 nm.
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Figure 7: Critical contact stress for the fabrication of friction-induced hillock. AFM images (top) and cross-sectional profiles (bottom) of the friction-induced nanolines on quartz surface created by 30 scratching cycles at a displacement amplitude D of 200 nm.

Mentions: It is well-known that quartz is essentially a stable oxide and hence no further oxidation can occur to it. As a result, the mechanical interaction should be responsible for the generation of hillocks on quartz. Under a high load, the scratching on material surface can lead to the generation of grooves [15,20]. Therefore, for a given AFM tip, it is important to select a suitable normal load for the fabrication of the protuberant nanostructures on quartz surface. As shown in Figure 7, under the conditions of tip radius R = 300 nm, N = 30 and D = 200 nm, the transition from the generation of the hillock to groove was observed with the increase in normal load Fn. As Fn increased from 3 to 35 μN, the hillocks kept growing from 0.4 to 2.5 nm. When Fn reached to 67 μN, the peak of the structures began to collapse, but the formation of protrusive structures still dominated the scratching. When Fn further increased to 80 μN, a slight groove was observed on the top of the hillock. Finally, when Fn attained 115 μN, an evident groove was produced on the surface of quartz. Therefore, under the given conditions, 3 to 67 μN is the effective load range for the creation of protrusive structures on a quartz surface.


Friction-induced nanofabrication method to produce protrusive nanostructures on quartz.

Song C, Li X, Yu B, Dong H, Qian L, Zhou Z - Nanoscale Res Lett (2011)

Critical contact stress for the fabrication of friction-induced hillock. AFM images (top) and cross-sectional profiles (bottom) of the friction-induced nanolines on quartz surface created by 30 scratching cycles at a displacement amplitude D of 200 nm.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211397&req=5

Figure 7: Critical contact stress for the fabrication of friction-induced hillock. AFM images (top) and cross-sectional profiles (bottom) of the friction-induced nanolines on quartz surface created by 30 scratching cycles at a displacement amplitude D of 200 nm.
Mentions: It is well-known that quartz is essentially a stable oxide and hence no further oxidation can occur to it. As a result, the mechanical interaction should be responsible for the generation of hillocks on quartz. Under a high load, the scratching on material surface can lead to the generation of grooves [15,20]. Therefore, for a given AFM tip, it is important to select a suitable normal load for the fabrication of the protuberant nanostructures on quartz surface. As shown in Figure 7, under the conditions of tip radius R = 300 nm, N = 30 and D = 200 nm, the transition from the generation of the hillock to groove was observed with the increase in normal load Fn. As Fn increased from 3 to 35 μN, the hillocks kept growing from 0.4 to 2.5 nm. When Fn reached to 67 μN, the peak of the structures began to collapse, but the formation of protrusive structures still dominated the scratching. When Fn further increased to 80 μN, a slight groove was observed on the top of the hillock. Finally, when Fn attained 115 μN, an evident groove was produced on the surface of quartz. Therefore, under the given conditions, 3 to 67 μN is the effective load range for the creation of protrusive structures on a quartz surface.

Bottom Line: The height of these nanostructures increases with the increase of the number of scratching cycles or the normal load.Further analysis reveals that during scratching, a contact pressure ranged from 0.4Py to Py (Py is the critical yield pressure of quartz) is apt to produce protuberant nanostructures on quartz under the given experimental conditions.Finally, it is of great interest to find that the protrusive nanostructures can be selectively dissolved in 20% KOH solution.

View Article: PubMed Central - HTML - PubMed

Affiliation: Tribology Research Institute, National Traction Power Laboratory, Southwest Jiaotong University, Chengdu, Sichuan Province 610031, People's Republic of China. linmao@swjtu.edu.cn.

ABSTRACT
In this paper, a new friction-induced nanofabrication method is presented to fabricate protrusive nanostructures on quartz surfaces through scratching a diamond tip under given normal loads. The nanostructures, such as nanodots, nanolines, surface mesas and nanowords, can be produced on the target surface by programming the tip traces according to the demanded patterns. The height of these nanostructures increases with the increase of the number of scratching cycles or the normal load. Transmission electron microscope observations indicated that the lattice distortion and dislocations induced by the mechanical interaction may have played a dominating role in the formation of the protrusive nanostructures on quartz surfaces. Further analysis reveals that during scratching, a contact pressure ranged from 0.4Py to Py (Py is the critical yield pressure of quartz) is apt to produce protuberant nanostructures on quartz under the given experimental conditions. Finally, it is of great interest to find that the protrusive nanostructures can be selectively dissolved in 20% KOH solution. Since the nanowords can be easily 'written' by friction-induced fabrication and 'erased' through selective etching on a quartz surface, this friction-induced method opens up new opportunities for future nanofabrication.

No MeSH data available.


Related in: MedlinePlus