Flexible, Printable, and Biocompatible CNT-Based Conductive Ink for Fabrication of Supercapacitors and Biosensors

Shin, Su-Ryon ;   Farzad, Razieh ;   Monaharan, Vijian ;   Tamayol, Ali ;   Zhang, Yu Shrike ;   Duck jin, Kim ;   Annabi, Nasim ;   Comotto, Mattia ;   Akbari, Mohsen ;   Dokmeci, Mehmet R. ;   Khademhosseini, Ali

ABSTRACT--Multifunctional carbon nanotubes (CNTs) composite materials are currently of considerable interest in fabrication of flexible electronics for biomedical applications, where biosensing, actuation, and energy-storage functions are highly desirable. Here, we present a printable biocompatible CNT-based conductive ink, in which a bio-surfactants using DNA and chemically modified gelatin successfully improved dispersion CNT in water, which exhibit long-term stability. This bio-CNT ink was printable allowing for easy fabrication of patterned conductive structures without harsh processes on various flexible substrates such as paper, hydrogels, and elastomer that showed high conductivity and capacitance.