直鏈乙炔碳

直鏈乙炔碳（Linear Acetylenic Carbon），也稱卡拜（Carbyne）、線型碳（Linear carbon），碳的一種同素異形體，^[1]具有-(C $\equiv$ C)_n-類型的結構。^[2]其中每個碳都是sp雜化，碳碳單鍵和三鍵交替。這種類型卡拜的楊氏模量是已知天然最硬材料——鑽石的40倍，同時也是奈米碳管的兩倍，因此將是很好的納米材料。^[3]

參考資料

^ Dangerously Seeking Linear Carbon, Ray H. Baughman, Science 19 May 2006: Vol. 312. no. 5776, pp. 1009 - 1110.
^ Carbyne and Carbynoid Structures Series: Physics and Chemistry of Materials with Low-Dimensional Structures, Vol. 21 Heimann, R.B.; Evsyukov, S.E.; Kavan, L. (Eds.) 1999, 452 p., Hardcover ISBN 0-7923-5323-4
^ Harder than Diamond: Determining the Cross-Sectional Area and Young's Modulus of Molecular Rods, Lior Itzhaki et al, Angew. Chem. Int. Ed. 2005, 44, 7432-7435.

[1] Dangerously Seeking Linear Carbon, Ray H. Baughman, Science 19 May 2006: Vol. 312. no. 5776, pp. 1009 - 1110.

[2] Carbyne and Carbynoid Structures Series: Physics and Chemistry of Materials with Low-Dimensional Structures, Vol. 21 Heimann, R.B.; Evsyukov, S.E.; Kavan, L. (Eds.) 1999, 452 p., Hardcover ISBN 0-7923-5323-4

[3] Harder than Diamond: Determining the Cross-Sectional Area and Young's Modulus of Molecular Rods, Lior Itzhaki et al, Angew. Chem. Int. Ed. 2005, 44, 7432-7435.

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