Details

Autor(en) / Beteiligte

• Atchudan, Raji
• Muthuchamy, Nallal
• Edison, Thomas Nesakumar Jebakumar Immanuel
• Perumal, Suguna
• Vinodh, Rajangam
• Park, Kang Hyun
• Lee, Yong Rok

Titel

An ultrasensitive photoelectrochemical biosensor for glucose based on bio-derived nitrogen-doped carbon sheets wrapped titanium dioxide nanoparticles

Ist Teil von

• Biosensors & bioelectronics, 2019-02, Vol.126, p.160-169

Ort / Verlag

England: Elsevier B.V

Erscheinungsjahr

2019

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• In this work, an ultra-sensing photoelectrochemical (PEC) glucose biosensor has been constructed from the bio-derived nitrogen-doped carbon sheets (NDC) wrapped titanium dioxide nanoparticles (NDC-TiO2 NPs) followed by the covalent immobilization of glucose oxidase (GODx) on them (designated as a GODx/NDC-TiO2NPs/ITO biosensor). Initially, the TiO2 NPs was synthesized by sol-gel method and then NDC-TiO2 NPs was synthesized utilizing a green source of Prunus persica (peach fruit) through a simple hydrothermal process. The synthesized NDC-TiO2 NPs composite was characterized by FESEM, HRTEM, Raman spectroscopy, XRD, ATR-FTIR spectroscopy and XPS to determine composition and phase purity. These fabricated GODx/NDC-TiO2NPs/ITO biosensor exhibited a good charge separation, highly enhanced and stable photocurrent responses with switching PEC behavior under the light (λ > 400 nm). As a result, GODx/NDC-TiO2NPs/ITO PEC glucose sensor exhibits a good photocurrent response to detection of glucose concentrations (0.05–10 μM) with an ultra-low detection limit of 13 nM under optimized PEC experimental conditions. Also, the PEC glucose sensor revealed a high selectivity, good stability, long time durability, and capability to analyze the glucose levels in real human serum. Also, the further development of this work may provide new insights into preparing other bio-derived carbon nanostructure-based photocatalysts for PEC applications. [Display omitted] •NDC-TiO2 NPs was synthesized hydrothermally utilizing a green source of peach fruit.•GODx/NDC-TiO2NPs/ITO biosensor successfully fabricated for PEC electrode material.•The biosensor delivers a LOD of 13 nM with a wide linear range of 0.05–10 μM.•Also, the PEC glucose detection in real human blood serum with good recoveries.•Green source derived PEC biosensor is an ideal platform for other PEC biosensors.