RETRACTED: Bimetallic magnetic nanoparticle as a new platform for fabrication of pyridoxine and pyridoxal-5'-phosphate imprinted polymer modified high throughput electrochemical sensor.

This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/our-business/policies/article-withdrawal). This article has been retracted at the request of the Editor-in-Chief following concerns raised by a reader. The article uses an electron micrograph identical to another publication. Fig. 2B is identical to Fig. 1C published in Biosensors and Bioelectronics Volume 78, 15 April 2016, Pages 454-463, https://doi.org/10.1016/j.bios.2015.11.092. In addition, the extraordinary similarities observed between the data presented in Fig. 1D and in Fig. 3C in ACS Biomater. Sci. Eng., 2017, 3 (9), pp 2120–2135, https://doi.org/10.1021/acsbiomaterials.7b00089, Fig. 4A in Colloids and Surfaces B: Biointerfaces, Volume 142, 1 June 2016, Pages 248–258 https://doi.org/10.1016/j.colsurfb.2016.02.053 and Fig. 4C in Biosensors and Bioelectronics, Volume 97, 15 November 2017, Pages 208–217, https://doi.org/10.1016/j.bios.2017.06.003 are highly unlikely. This problem with the data casts doubt on all the data, and accordingly also the conclusions based on that data, in this publication. As such this article represents a severe abuse of the scientific publishing system. The scientific community takes a very strong view on this matter and apologies are offered to readers of the journal that this was not detected during the submission process.

[1]  Santanu Patra,et al.  An imprinted Ag@CdS core shell nanoparticle based optical-electrochemical dual probe for trace level recognition of ferritin. , 2015, Biosensors & bioelectronics.

[2]  Fang-Fang Chen,et al.  Preparation of magnetic molecularly imprinted polymer for selective recognition of resveratrol in wine. , 2013, Journal of chromatography. A.

[3]  Royce W Murray,et al.  Nanoelectrochemistry: metal nanoparticles, nanoelectrodes, and nanopores. , 2008, Chemical reviews.

[4]  Fei Xiao,et al.  Growth of coral-like PtAu-MnO2 binary nanocomposites on free-standing graphene paper for flexible nonenzymatic glucose sensors. , 2013, Biosensors & bioelectronics.

[5]  A. Jenkins,et al.  Molecularly imprinted polymer sensors for pesticide and insecticide detection in water. , 2001, The Analyst.

[6]  D. Sherrington,et al.  Synthesis and evaluation of a molecularly imprinted polymer for selective on-line solid-phase extraction of 4-nitrophenol from environmental water. , 2000, Analytical chemistry.

[7]  Prashant K. Sharma,et al.  Developing electrochemical sensor for point-of-care diagnostics of oxidative stress marker using imprinted bimetallic Fe/Pd nanoparticle. , 2015, Talanta.

[8]  S. Basu,et al.  Synthesis, characterization and application of platinum based bi-metallic catalysts for direct glucose alkaline fuel cell , 2011 .

[9]  E. Llorent-Martínez,et al.  A multicommuted fluorescence-based sensing system for simultaneous determination of Vitamins B2 and B6 , 2006 .

[10]  S. Chandra,et al.  Synthesis and characterization of copper nanoparticles by reducing agent , 2014 .

[11]  G. Wulff,et al.  Enzyme-like catalysis by molecularly imprinted polymers. , 2002, Chemical reviews.

[12]  Xiwen He,et al.  A "turn-on" fluorescent receptor for detecting tyrosine phosphopeptide using the surface imprinting procedure and the epitope approach. , 2015, Biosensors & bioelectronics.

[13]  M. Toney,et al.  Reaction specificity in pyridoxal phosphate enzymes. , 2005, Archives of biochemistry and biophysics.

[14]  B. Sellergren,et al.  Imprinted chiral stationary phases in high-performance liquid chromatography. , 2001, Journal of chromatography. A.

[15]  Santanu Patra,et al.  Imprinted ZnO nanostructure-based electrochemical sensing of calcitonin: a clinical marker for medullary thyroid carcinoma. , 2015, Analytica chimica acta.

[16]  Zhaohui Zhang,et al.  Cobalt-nickel bimetallic nanoparticles decorated graphene sensitized imprinted electrochemical sensor for determination of octylphenol , 2015 .

[17]  J. Nozaki,et al.  Voltammetric determination of pyridoxine (vitamin B6) in drugs using a glassy carbon electrode modified with chromium(III) hexacyanoferrate(II) , 2009 .

[18]  Jingkun Xu,et al.  Electroactive species-doped poly(3,4-ethylenedioxythiophene) films: enhanced sensitivity for electrochemical simultaneous determination of vitamins B2, B6 and C. , 2013, Biosensors & bioelectronics.

[19]  Jingkun Xu,et al.  A facile one-pot strategy for the electrochemical synthesis of poly(3,4-ethylenedioxythiophene)/Zirconia nanocomposite as an effective sensing platform for vitamins B2, B6 and C , 2014 .

[20]  Xiaojie Xu,et al.  Selective separation of active inhibitors of epidermal growth factor receptor from Caragana jubata by molecularly imprinted solid-phase extraction. , 2003, Journal of chromatography. A.

[21]  B. Brunetti,et al.  Voltammetric determination of vitamin B6 in food samples and dietary supplements , 2014 .

[22]  Prashant K. Sharma,et al.  RETRACTED: Multifunctional magnetic reduced graphene oxide dendrites: synthesis, characterization and their applications. , 2015, Biosensors & bioelectronics.

[23]  Frantisek Svec,et al.  Molecular imprinting of proteins in polymers attached to the surface of nanomaterials for selective recognition of biomacromolecules. , 2013, Biotechnology advances.

[24]  C. Fonseca,et al.  Exploiting ion-pair formation for the enhancement of electroanalytical determination of pyridoxine (B6) onto polyurethane-graphite electrodes , 2011 .

[25]  C. Cai,et al.  In-situ IR Monitoring the Synthesis of Amphiphilic Copolymery P(HEMA-co-tBMA) via ARGET ATRP , 2014 .

[26]  H. Razmi,et al.  Flow injection amperometric determination of pyridoxine at a Prussian blue nanoparticle-modified carbon ceramic electrode , 2010 .

[27]  Quan Li,et al.  Synthesis and characterization of Fe-Fe2O3 core-shell nanowires and nanonecklaces , 2007 .

[28]  K. Asadpour‐Zeynali,et al.  Net analyte signal standard addition method (NASSAM) as a novel spectrofluorimetric and spectrophotometric technique for simultaneous determination, application to assay of melatonin and pyridoxine. , 2010, Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy.

[29]  Ligang Chen,et al.  Quantum dots coated with molecularly imprinted polymer as fluorescence probe for detection of cyphenothrin. , 2015, Biosensors & bioelectronics.

[30]  H. Abdollahi,et al.  Synthesis, optimization, and characterization of molecularly imprinted nanoparticles , 2013, International Nano Letters.

[31]  M. Sharp,et al.  Preliminary determinations of electron transfer kinetics involving ferrocene covalently attached to a platinum surface , 1979 .

[32]  Martin Pumera,et al.  Carbon nanotube disposable detectors in microchip capillary electrophoresis for water‐soluble vitamin determination: Analytical possibilities in pharmaceutical quality control , 2008, Electrophoresis.

[33]  F. J. Holler,et al.  Principles of Instrumental Analysis , 1973 .

[34]  R. Narayanaswamy,et al.  Ultrasensitive detection of vitamin B6 using functionalised CdS/ZnS core–shell quantum dots ☆ , 2015 .

[35]  Jinghua Yu,et al.  Ultrasensitive electrochemiluminescence detection of DNA based on nanoporous gold electrode and PdCu@carbon nanocrystal composites as labels. , 2012, The Analyst.

[36]  C. Liu,et al.  Preparation and characterization of three dimensional graphene foam supported platinum-ruthenium bimetallic nanocatalysts for hydrogen peroxide based electrochemical biosensors. , 2014, Biosensors & bioelectronics.

[37]  Rafael Artuch,et al.  Pyridoxal 5'-phosphate values in cerebrospinal fluid: reference values and diagnosis of PNPO deficiency in paediatric patients. , 2008, Molecular genetics and metabolism.

[38]  Sun,et al.  Monodisperse FePt nanoparticles and ferromagnetic FePt nanocrystal superlattices , 2000, Science.

[39]  Valter Doleček,et al.  Substitution of the constant phase element by Warburg impedance for protective coatings , 2007 .

[40]  Lei Zhang,et al.  Electrochemical synthesis of polyaniline nano-networks on p-aminobenzene sulfonic acid functionalized glassy carbon electrode Its use for the simultaneous determination of ascorbic acid and uric acid. , 2008, Biosensors & bioelectronics.

[41]  Hua Gao,et al.  Nanoporous PtAu alloy as an electrochemical sensor for glucose and hydrogen peroxide , 2014 .

[42]  Hong Jiang,et al.  Bimetallic Fe nanoparticles: Recent advances in synthesis and application in catalytic elimination of environmental pollutants , 2014 .

[43]  Santanu Patra,et al.  Nano-iniferter based imprinted sensor for ultra trace level detection of prostate-specific antigen in both men and women. , 2015, Biosensors & bioelectronics.

[44]  Manos Mavrikakis,et al.  Ru-Pt core-shell nanoparticles for preferential oxidation of carbon monoxide in hydrogen. , 2008, Nature materials.

[45]  Yuzhong Zhang,et al.  Voltammetric Determination of Vitamin B6 at Glassy Carbon Electrode Modified with Gold Nanoparticles and Multi-Walled Carbon Nanotubes , 2011 .

[46]  Rongming Wang,et al.  Bimetallic nanostructures with magnetic and noble metals and their physicochemical applications , 2013 .

[47]  Younan Xia,et al.  Pd-Pt Bimetallic Nanodendrites with High Activity for Oxygen Reduction , 2009, Science.

[48]  S. Sathyanarayana The retardation of electrochemical reactions by adsorbed organic molecules; a quantitative treatment involving the theory of irreversible polarographic , 1965 .

[49]  P. Szefer,et al.  High-performance liquid chromatography method for the simultaneous determination of thiamine hydrochloride, pyridoxine hydrochloride and cyanocobalamin in pharmaceutical formulations using coulometric electrochemical and ultraviolet detection. , 2005, Journal of chromatography. A.

[50]  Shaojun Guo,et al.  A silk derived carbon fiber mat modified with Au@Pt urchilike nanoparticles: A new platform as electrochemical microbial biosensor. , 2010, Biosensors & bioelectronics.

[51]  A. Molinelli,et al.  Advanced solid phase extraction using molecularly imprinted polymers for the determination of quercetin in red wine. , 2002, Journal of agricultural and food chemistry.

[52]  C. Brett,et al.  New electrode architectures based on poly(methylene green) and functionalized carbon nanotubes: Characterization and application to detection of acetaminophen and pyridoxine , 2015 .

[53]  F. Bowling Pyridoxine supply in human development. , 2011, Seminars in cell & developmental biology.

[54]  Xiwen He,et al.  Smart surface imprinting polymer nanospheres for selective recognition and separation of glycoprotein , 2013 .