Dialon Applications

Dialon may have numerous applications. For example, it can be coated on plastic material to improve the air tightness. For example,

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Figure 10.11. Frictional coefficient between steel ball and DLC coated high speed steel plate.

the interior of PET bottles can be coated with dialon by inserting the container with an electrode that echoes with the exterior electrode in radio frequency (e.g. 15.6 MHz). The decomposed gas (e.g. acetylene) will coat the plastic to form DLC. The DLC sealed PET would not react with almost any liquid. Dialon would be a much better coating than ordinary DLC so the coated container can be used to store beverages or beers. Figure 10.12 shows the effectiveness of sealing a permeable wall by coating with DLC.

Figure 10.12. Air permeability as a function of time demonstrated that dialon is the ideal sealer for plastic materials.

Table 10.2. Adherence of platelets on different materials

Substrate Density (No/cm2)

Silicon 500 millions

DLC coating 100 millions Dialon coating 5 millions

Another example is to coat dialon on biological implants. The fluorine atoms will repel water so the body fluid cannot stain the surface of the implant. Dialon coated heart valves and vein stents are the least likely to adhere bood platelets that may hinder their functions. Table 10.2 compares the densities of platelets that are adhered on various substrates immersed in blood.

Dialon may also be coated on the exterior surface of piston or the interior surface of cylinder in an engine. In this case the hydrophobic surface is highly oil hungry (lipophilic) so it can be

Figure 10.13. The schematic of a running engine with oil firmly attached to dialon that is coated on the interior of the cylinder. The engine oil may also contain suspended nanodiamond made by the detonation of dynamic of further reduce the frictional coefficient.

firmly attached with a thin film of non-polar oil. This in situ lubricant can prevent frictional rubbing between the moving parts. As a result, not only the engine life may be extended, but also the running efficiency (e.g. higher gas mileage may be expected from an automobile). Figure 10.13 illustrates the oil retention effect of fluorine containing DLC.

Figure 10.14. The atomic distance of (111) faces in diamond (top). The stacking of (111) planes actually forms a sieve with hole sizes measured in angstroms (bottom). These planes are the smoothest surface possible of all materials, including other faces of diamond.
Figure 10.15. The ideal storage mechanism of digital information by coding the diamond's (111) face with F and H atoms. The density of such bits (0 and 1) can be easily million times higher than the current designs based on virus-sized magnets (hard drive) or capacitors (DRAM).
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