Interdigitated microelectrode designs have been widely employed in electrochemical sensors. Decreasing the dimensions of the electrode and interelectrode gap shortens the response time of the device and enhances its cycling efficiency. These two attributes are desirable in the field of ultracapacitors (or supercapacitors), where power is often restricted by the widely distributed resistances that go hand-in-hand with the large capacitance. Carbon nanotubes (CNT) of one-dimensional conductivity are generally considered as model materials for this capacitor.


Ultracapacitor featuring vertically aligned carbon nanotubes

Dah-Shyang Tsai is professor of chemical engineering at the National Taiwan University of Science and Technology, Taipei, Taiwan. His publications can be found on ResearchGate. He is currently studying various types of ultracapacitor and their performance with Ying-Sheng Huang and Kuei-Yi Lee (two professors of electronic engineering).