Controllable one step copper coating on carbon nanofibers for flexible cholesterol biosensor substrates
By Bajaj, Bharat and Joh, Han I. and Jo, Seong M. and Kaur, Gurpreet and Sharma, Anjali and Tomar, Monika and Gupta, Vinay and Lee, Sungho
Published in J. Mater. Chem. B
The Royal Society of Chemistry
2016
Abstract
Electrospun carbon nanofibers (CNFs) decorated with copper oxide nanoparticles were successfully synthesized using a one step and modified hydroxyl ion assisted alcohol reduction method. The X-ray diffraction pattern reveals the presence of (-111), (111) and (-202) crystal planes of monoclinic copper oxide (CuO). The CuO coated CNF air annealed at 250 [degree]C exhibited an electrical conductivity of 251 S m-1. The CuO coated CNFs were employed as a novel flexible matrix for a cholesterol biosensor. The biosensor exhibited a high sensitivity of 75 [small mu ]A mM-1 cm-2 over the linear range (0.12 mM to 12.93 mM) of cholesterol. This coating method offers easy and inexpensive processing with a flexible and robust supporting structure for biosensing applications.