Highly sensitive glucose sensor based on monodisperse palladium nickel/activated carbon nanocomposites
Authors: Aysun Şavk
Yağmur Koskun
Betül Şen
Fatih Şen
Journal: Analytica Chimica Acta (2018)
Discipline: CHEMISTRY
Keywords: Activated carbon; Biosensors; Glucose sensors; Nanostructures; Remarkable efficiency.
Affiliations: Sen Research Group, Biochemistry Department, Faculty of Arts and Science, Dumlupınar University, Evliya Çelebi Campus, 43100, Kütahya, Turkey., Sen Research Group, Biochemistry Department, Faculty of Arts and Science, Dumlupınar University, Evliya Çelebi Campus, 43100, Kütahya, Turkey. Electronic address: .

Abstract:  Glucose enzyme biosensors have been used for a variety of applications such as medical diagnosis, bioprocess engineering, beverage industry and environmental scanning etc. and there is still a growing interest in glucose sensors. For this purpose, addressed herein, as a novel glucose sensor, highly sensitive activated carbon (AC) decorated monodisperse nickel and palladium alloy nanocomposites modified glassy carbon electrode (Ni-Pd@AC/GCE NCs) have been synthesized by in-situ reduction technique. Raman Spectroscopy (RS), X-ray Photoelectron Spectroscopy (XPS), X-ray Diffraction (XRD), Transmission Electron Microscopy (TEM), cyclic voltammetry (CV) and chronoamperometry (CA) were used for the characterization of the prepared non-enzymatic glucose sensor. The characteristic sensor properties of the Ni-Pd@AC/GCE electrode were compared with Ni-Pd NCs/GCE, Ni@AC/GCE and Pd@AC/GCE and the results demonstrate that the AC is very effective in the enhancement of the electrocatalytic properties of sensor. In addition, the Ni-Pd@AC/GCE nanocomposites showed a very low detection limit of 0.014 μM, a wide linear range of 0.01 mM-1 mM and a very high sensitivity of 90 mA mM-1 cm-2. Furthermore, the recommended sensor offer the various advantageous such as facile preparation, fast response time, high selectivity and sensitivity. Lastly, monodisperse Ni-Pd@AC/GCE was utilized to detect glucose in real sample species. 

Retracted: No

PubPeer comments:
 Unexpected similarity in noise for two XRD patterns. Little differently processed copies of the same XRD pattern most likely. ![file] , 
 Raman spectra with too many small details unexpectedly similar. Differently subtracted background for the same spectrum very likely. ![file] , 
 This paper is one of a set of at least 14 papers by the same research group that all appear to share the same photo. In all papers, this photo is used as a zoomed-in inset representing the high-resolution transmission electron microscopy (HRTEM) analysis of the  atomic lattice fringe and particle size of the nanoparticles. Of concern, the same photo, which I have called  Inset 2 , is used to represent a different type of nanoparticle in each of these papers. Here is a collage of 6 different uses of  Inset 2 : ![file] Here is a list of the 14 papers identified so far that all use this photo, and the different types of nanoparticles that they represent. * Betuu0308l Celik et al. - DOI: 10.1016 j.ijhydene.2015.12.138 - Pt(0) DOA@CNT * Betuu0308l Su0327en et al. - DOI: 10.1016 j.ijhydene.2017.05.115 - PdeNi@PEDOT * Betuu0308l Su0327en et al. - DOI: 10.1016 j.ijhydene.2017.06.032 - RuCo@G-MWCNT * Betuu0308l Su0327en et al. - DOI: 10.1016 j.ijhydene.2017.04.213 - RuPtNi@GO * Betuu0308l Su0327en et al. - DOI: 10.1016 j.ijhydene.2017.05.113 - PdNi@GO * Betuu0308l Su0327en et al. - DOI: 10.1016 j.ijhydene.2017.05.112 - Pt@PANI-rGO * Betuu0308l Su0327en et al. - DOI: 10.1016 j.jcis.2018.03.004 - PtNPs@CBH * Betuu0308l Su0327en et al. - DOI: 10.1016 j.jcis.2019.03.057 - PdRu@PVP * Betuu0308l Su0327en et al. - DOI: 10.1016 B978-0-08-102509-3.00002-X - Pd-Ni@AC * Birguu0308tay Su0327ahin et al. - DOI: 10.1016 j.jbiotec.2017.09.012 - Pomegranate Ag NPs * Enes Demir et al. - DOI: 10.1016 j.nanoso.2017.08.018 - Mw-Pt NPs@GO * Enes Demir et al. - DOI: 10.1016 j.nanoso.2017.06.003 - Pt@f-MWCNT * Suleyman Akocak et al. - DOI: 10.1016 j.nanoso.2017.06.002 - Pd@GO * Yagmur Koskun et al. - DOI: 10.1016 j.aca.2018.01.035 - Ni-Pd@AC Of note, this is a different set of papers than the 30 papers by the same group that all appear to use another HRTEM image called  Inset 1 . For an example of that photo and the list of those 30 papers, see DOI 10.1016 j.ijhydene.2018.03.175 https: pubpeer.com publications 8AD71F4A32472314CCE9983D47E36F Here is Figure 1 from this paper, showing the  Inset 2 photo. ![file] , 
 Corrigendum published with 4 figures substituted. Current incorrect version:Fig.1. (a) Transition electron micrograph and HR-TEM image, (b) Particle size histogram, (c) The Raman spectra (d) The XRD of Ni-Pd@ACNCs. Corrected version:Fig.1. (a) Transition electron micrograph and HR-TEM image, (b) Particle size histogram, (c) The Raman spectra (d) The XRD of Ni-Pd@ACNCs. ,