Controlled Termination of the Growth of Vertically Aligned Carbon Nanotube Arrays


  • K.J. and S.F. acknowledge the financial support from the National Basic Research Program of China (2005CB623606) and the NSFC (10334060). We thank Tengge Ma and Changqing Yin for help in depositing the iron catalyst, and Abigail Curtis, Yinghui Sun, and Zhi Zheng for proofreading. Supporting information is available online from Wiley InterScience or from the author.


original image

Careful control of the termination step during CNT growth results in straight roots and good adhesion to the substrate, in sharp contrast to the roots of naturally terminated CNTs that are highly curved and contain trapped catalyst. Direct force measurements show that well-controlled termination gives rise to an adhesion three times larger than that of natural termination.