Cu and Ni Co-sputtered heteroatomic thin film for enhanced nonenzymatic glucose detection

Abstract

In this work, we report a wafer-scale and chemical-free fabrication of nickel (Ni) and copper (Cu) heteroatomic Cu–Ni thin films using RF magnetron sputtering technique for non-enzymatic glucose sensing application. The as-prepared wafer-scale Cu–Ni thin films exhibits excellent electrocatalytic activity toward glucose oxidation with a 1.86 μM detection limit in the range of 0.01 mM to 20 mM range. The Cu–Ni film shows 1.3- and 5.4-times higher glucose oxidation activity in comparison to the Cu and Ni electrodes, respectively. The improved electrocatalytic activity is attributed to the synergistic effect of the bimetallic catalyst and high density of grain boundaries. The Cu–Ni electrodes also possessed excellent anti-interference characteristics. These results indicate that Cu–Ni heteroatomic thin film can be a potential candidate for the development of non-enzymatic glucose biosensor because of its chemical free synthesis, excellent reproducibility, reusability, and long-term stability.

Fabrication and Wetting Characteristics of Copper Thin Film: An Active Layer for SPR-based Sensor Applications

“…Cu thin lms are simple to manufacture in an eco-friendly manner [5][6][7][8]. With regards to properties, Cu-based thin lms offer excellent anti-interference characteristics and radiation resistance [9][10][11][12]. Cu-based thin lms play a crucial role in Surface Plasmon Resonance (SPR) sensors, offering several important advantages and impacts [13][14].…”

An efficient transition metal chalcogenide sensor for monitoring respiratory alkalosis

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