%0 Journal Article
%T Reliable Diameter Control of Carbon Nanotube Nanobundles Using Withdrawal Velocity
%A Geunbae Lim
%A Jung Hwal Shin
%A Kanghyun Kim
%A Taechang An
%A WooSeok Choi
%J Archive of "Nanoscale Research Letters".
%D 2016
%R 10.1186/s11671-016-1600-9
%X Carbon nanotube (CNT) nanobundles are widely used in nanoscale imaging, fabrication, and electrochemical and biological sensing. The diameter of CNT nanobundles should be controlled precisely, because it is an important factor in determining electrode performance. Here, we fabricated CNT nanobundles on tungsten tips using dielectrophoresis (DEP) force and controlled their diameters by varying the withdrawal velocity of the tungsten tips. Withdrawal velocity pulling away from the liquid¨Cair interface could be an important, reliable parameter to control the diameter of CNT nanobundles. The withdrawal velocity was controlled automatically and precisely with a one-dimensional motorized stage. The effect of the withdrawal velocity on the diameter of CNT nanobundles was analyzed theoretically and compared with the experimental results. Based on the attachment efficiency, the withdrawal velocity is inversely proportional to the diameter of the CNT nanobundles; this has been demonstrated experimentally. Control of the withdrawal velocity will play an important role in fabricating CNT nanobundles using DEP phenomena
%K Carbon nanotube (CNT)
%K CNT nanobundle
%K Capillary force
%K van der Waals force
%K Withdrawal velocity
%K Attachment efficiency
%U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5007225/