Beta carbon nitride

Beta carbon nitride

Beta carbon nitride (β-C3N4) is a material predicted to be harder than diamond. [ [http://www.nature.com/news/2000/000511/full/news000511-1.html Access : Crunchy filling : Nature News ] ]

The material was first proposed in 1985 by Marvin Cohen and Amy Liu. Examining the nature of crystalline bonds they theorised that carbon and nitrogen atoms could form a particularly short and strong bond in a stable crystal lattice in a ratio of 1:1.3. That this material would be harder than diamond on the Mohs scale was first proposed in 1989.

See also

* Superhard materials

References

* A. Liu and M. Cohen, "Prediction of New Low Compressibility Solids". "Science" 245, pp. 841-842 (1989)
* C. Niu, Y.Z. Lu and C.M. Lieber, "Experimental Realization of the Covalent Solid Carbon Nitride". "Science" 261, 334 (1993).
* J. Martín-Gil, F.J. Martín-Gil, M. Sarikaya, M. Qian, M. José-Yacamán, A. Rubio, "Evidence of a low-compressibility carbon nitride with defect-zincblende structure". "J. Appl. Phys" 81, pp. 2555-2559 (1997).
* L.W. Yin, M.S. Li, Y.X. Liu, J.L. Sui, J.M. Wang, " [http://www.iop.org/EJ/article/0953-8984/15/2/330/c30230.pdf Synthesis of beta carbon nitride nanosized crystal through mechanochemical reaction] ". "J.Phys.: Condens. Matter" 15, pp. 309-314 (2003).
* L.W. Yin, Y. Bando, M.S. Li, Y.X. Liu, Y.X. Qi, " [http://doi.wiley.com/10.1002/adma.200305307 Unique Single-Crystalline Beta Carbon Nitride Nanorods] ". "Advanced Materials" 15, pp. 1840-1844 (2003)


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