Au decorated core-shell structured Au@Pt for the glucose oxidation reaction

Authors

Kyubin Shim, University of WollongongFollow
Won Lee, Pusan National University
Min-Sik Park, Kyung Hee University
Mohammed Shahabuddin, King Saud University
Yusuke Yamauchi, University of Queensland, National Institute for Materials ScienceFollow
Md. Shahriar Al Hossain, University of Wollongong, University of QueenslandFollow
Yoon-Bo Shim, Pusan National University
Jung Ho Kim, University of Wollongong, Kyung Hee UniversityFollow

RIS ID

130504

Publication Details

Shim, K., Lee, W., Park, M., Shahabuddin, M., Yamauchi, Y., Hossain, M. A., Shim, Y. & Kim, J. (2019). Au decorated core-shell structured Au@Pt for the glucose oxidation reaction. Sensors and Actuators B: Chemical: international journal devoted to research and development of physical and chemical transducers, 278 88-96.

Abstract

Core-shell structured Au@Pt nanoparticles (NPs) with Au cores and dendritic Pt shells have been synthesized using the sonochemical method. Then, the Au is electrochemically incorporated into nano-channels between the Pt shells on the Au@Pt NPs (Au@Pt/Au NPs) to form a non-enzymatic glucose sensor. The electrochemically active surface area (ECSA) of the obtained Au@Pt/Au NPs is enlarged compared with that of Au@Pt NPs, which leads to enhanced glucose sensing performance. The particle sizes of Au@Pt/Au NPs are in the range from 35 nm to 60 nm. The ECSA of Au@Pt/Au NPs is calculated to be 6.19 m2g(Pt)−1and 0.8 m2g(Au)−1by cyclic voltammetry. The Au incorporation into the Pt shell region can boost the glucose oxidation process even at neutral pH. The sensor performance under the optimized experimental conditions has been confirmed in phosphate buffered saline (PBSsal) solution, showing two wide dynamic ranges for glucose (0.5-10.0 μM and 0.01-10.0 mM) with the correlation coefficient of 0.99. The detection limit of glucose in PBS saline solution has been determined to be 445.7 (±10.3) nM.