Here we show videos of carbon nanotube forests and microstructures growing, as they are visible to the naked eye! The nanotubes are growing from a catalyst-coated silicon substrate which is placed on a suspended platform which is heated resistively as shown below [1,2]. Passing a current through this suspended section causes it to heat to the reaction temperature of approximately 800 C. In these videos, the structures are growing at approximately 0.1 mm per minute.

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1. Growth of a CNT forest from a uniform catalyst film, viewed from the side:
Beginning
End
Beginning
After 15:00
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2. Growth of a CNT forest from a uniform catalyst film, viewed from the top:
Beginning
After 15:00
 
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3. Growth of a patterned CNT forest from a uniform catalyst film, viewed from the side and top:
Beginning
End
Beginning
After 15:00
 
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[1] A.J. Hart, L.C. van Laake, A.H. Slocum.  Desktop Growth of Carbon Nanotube Monoliths with In Situ Optical Imaging. Small 3(5):772-777, 2007.
[2] L.C. van Laake, A.J. Hart, A.H. Slocum. A Suspended Heated Silicon Platform for Rapid Thermal Control of Surface Reactions with Application to Carbon Nanotube Synthesis. Review of Scientific Instruments 78:083901, 2007.
 
 
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