This work reports a novel approach of patterning carbon nanotubes (CNTs) with scanning electrochemical microscopy (SECM). The concept is based on the localized cathodic current flux, which induces the pH increase on the conductive surface confined under the microelectrode. The latter facilitates the local deposition of silane sol-gel films, which embed the CNTs from the dispersion. The patterns can be tuned by deposition potential, time and scan rate of the microelectrode, as characterized by optical microscopy, scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDX) and profilometry.
Bibliographical noteFunding Information:
This work is supported by the Israeli Ministry of Commerce through the Magnet project (Nano Empowerment Systems) and the Singapore National Research Foundation under CREATE program: “Nanomaterials for Energy and Water Management”. Prof. Rachel Yerushalmi-Rozen and Dr. Shani Eliyahu-Gross from Ben Gurion University of the Negev are acknowledged for their useful suggestions on preparing the CNT dispersion. The Harvey M. Krueger Family Center for Nanoscience and Nanotechnology of the Hebrew University is also acknowledged.
- Carbon nanotubes
- Scanning electrochemical microscopy (SECM)