A novel hierarchical 3D N-Co-CNT@NG nanocomposite electrode for non-enzymatic glucose and hydrogen peroxide sensing applications.
A novel 3D nanocomposite of nitrogen doped Co-CNTs over graphene sheets (3D N-Co-CNT@NG) have been successfully fabricated via a simple, scalable and one-step thermal decomposition method. This 3D hierarchical nanostructure provides an admirable conductive network for effective charge transfer and avoids the agglomeration of NG matrices, which examine direct as well as non-enzymatic responses to glucose oxidation and H2O2reduction at a low potential. The novel electrode showed excellent electrochemical performance towards glucose oxidation, with high sensitivity of 9.05μAcm-2mM-1, a wide linear range from 0.025 to 10.83mM, and a detection limit of 100nM with a fast response time of less than 3s. Furthermore, non-enzymatic H2O2sensors based on the 3D N-Co-CNT@NG electrode exhibited high sensitivity (28.66μAmM-1cm-2), wide linear range (2.0-7449μM), low detection limit of 2.0μM (S/N=3), excellent selectivity, decent reproducibility and long term stability. Such outstanding electrochemical performance can be endorsed to the large electroactive surface area, unique porous architecture, highly conductive networks, and synergistic interaction between N-Co-CNTs and nitrogen doped graphene (NG) in the novel 3D nanocomposite. This facile, cost-effective, sensitive, and selective glucose as well as H2O2sensors are also proven to be appropriate for the detection of glucose as well as H2O2in human serum.
Advanced Materials Institute of BIN Convergence Technology (BK21 Plus Global) & Department of BIN Convergence Technology, Chonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea.
Jayaraman
J
Balamurugan
Advanced Materials Institute of BIN Convergence Technology (BK21 Plus Global) & Department of BIN Convergence Technology, Chonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea.
Tran Duy
TD
Thanh
Advanced Materials Institute of BIN Convergence Technology (BK21 Plus Global) & Department of BIN Convergence Technology, Chonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea.
Gopalsamy
G
Karthikeyan
Advanced Materials Institute of BIN Convergence Technology (BK21 Plus Global) & Department of BIN Convergence Technology, Chonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea.
Nam Hoon
NH
Kim
Advanced Materials Institute of BIN Convergence Technology (BK21 Plus Global) & Department of BIN Convergence Technology, Chonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea; Carbon Composite Research Centre, Department of Polymer - Nano Science and Technology, Chonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea. Electronic address: jhl@chonbuk.ac.kr.
Joong Hee
JH
Lee
D015374:Biosensing Techniques; D055664:Electrochemical Techniques; D005947:Glucose / Q000737:chemistry / Q000302:isolation & purification*; D006108:Graphite / Q000737:chemistry; D006801:Humans; D006861:Hydrogen Peroxide / Q000737:chemistry / Q000302:isolation & purification*; D057230:Limit of Detection; D008297:Male; D053768:Metal Nanoparticles / Q000737:chemistry; D037742:Nanotubes, Carbon / Q000737:chemistry; D009584:Nitrogen / Q000737:chemistry
D037742:Nanotubes, Carbon; D006108:Graphite; D006861:Hydrogen Peroxide; D005947:Glucose; D009584:Nitrogen
Cobalt nanoparticles; Glucose; Hierarchical architecture; Hydrogen peroxide; Nanotube-graphene hybrid; Three-dimensional nanostructure