Dimanganese trioxide (Mn2O3) based label-free electrochemical biosensor for detection of Aflatoxin-B1

Singh, Avinash Kumar; Dhiman, Tarun Kumar; Lakshmi, G.B.V.S.; Solanki, Pratima R.

doi:10.1016/j.bioelechem.2020.107684

Cited by 48 publications

(18 citation statements)

References 34 publications

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“…These represent clusters of Mn 3 O 4 , Mn 2 O 3 and MnO at 3.5–4.5 eV and their intermixing with ZnO‐related UV emission at ≈3.3 eV. [ 44–46 ] The peaks are most intense in ZnMnO‐18 and ZnMnO‐23 but follow similar trends in all the samples. The proportion of various oxidation states of Mn depends on the growth temperature and pressure, and Mn ions start transitioning to Mn 3+ and Mn 4+ states with annealing at 1000 °C.…”

Section: Resultsmentioning

confidence: 99%

Optical and Structural Properties of Manganese‐Doped Zinc Oxide Grown by Metal‐Organic Chemical Vapor Deposition

Saravade

Manzoor

Corda

et al. 2021

Advanced Optical Materials

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This systematic study investigates the optical properties and process−structure−property relationships of Mn‐doped zinc oxide (ZnMnO) grown by metal‐organic chemical vapor deposition with varying Mn‐doping concentration and growth conditions. ZnMnO exhibits a good crystal quality oriented in the (002) direction and contains intermixtures of zinc oxide (ZnO)‐like and manganese oxide (MnxOy)‐like phases. The material exhibits a direct energy absorption band‐edge and a reduction in bandgap with Mn‐doping. Photoluminescence studies show that Mn‐doping can simultaneously tailor broad green band luminescence and ultraviolet edge emissions. Post‐growth air‐annealing results in broad MnxOy‐related photoluminescence emissions at 3.3–4.5 eV. A further reduction in the absorption band‐edge is also observed with annealing. Results indicate that luminescence wavelengths and intensities, and absorption band‐edge can be tuned with the Mn‐doping process. This paper promotes a thorough understanding of defect centers in ZnO with transition metal doping and their interrelation with optical characteristics. The work provides a solid foundation for the development of optoelectronic devices, such as light emitting diodes, solar cells, lasers, and photodetectors using ZnO‐based materials.

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Section: Resultsmentioning

confidence: 99%

Optical and Structural Properties of Manganese‐Doped Zinc Oxide Grown by Metal‐Organic Chemical Vapor Deposition

Saravade

Manzoor

Corda

et al. 2021

Advanced Optical Materials

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“…This happens because of the interaction between anti-NSE and CS/MoS 2 and the spatial orientation of antibodies, which provides conduction pathways for the charge carriers at the interface. 31,32 Furthermore, a decrease in current and an increase in R ct is found after attachment of BSA onto anti-NSE/CS/MoS 2 /ITO, due to the masking of non-specific sites for attachment by this blocking agent.…”

Section: Detailed Investigation Of the Electrochemical Performance Of...mentioning

confidence: 99%

Electrochemical studies of biofunctionalized MoS₂ matrix for highly stable immobilization of antibodies and detection of lung cancer protein biomarker

Khatri

Puri

2022

New J. Chem.

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“…MnO 2 nps were synthesized by the co-precipitation method described in our previous paper with a different calcination temperature (Singh et al, 2020) (Dhiman et al, 2020). After completing the synthesis process, the obtained dried powder was first ground to a fine powder and calcined at 350°C to get the MnO 2 phase.…”

Section: Synthesis Of Mno 2 Npsmentioning

confidence: 99%

Bio-Active Free Direct Optical Sensing of Aflatoxin B1 and Ochratoxin A Using a Manganese Oxide Nano-System

Singh

Lakshmi²,

Dhiman³

et al. 2021

Front. Nanotechnol.

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Aflatoxins-B1 (AFB1) and Ochratoxin-A (OchA) are the two types of major mycotoxin produced by Aspergillus flavus, Aspergillus parasiticus fungi, Aspergillus carbonarius, Aspergillus niger, and Penicillium verrocusumv. These toxins are mainly found in metabolite cereals, corn, coffee beans, and other oil-containing food items. Excessive consumption of these toxins can be carcinogenic and lead to cancer. Thus, their rapid testing became essential for food quality control. Herein, manganese oxide nanoparticles (MnO2 nps) have been proposed to explore the interaction with AFB1 and OchA using UV-visible spectroscopy. MnO2 nps were synthesized using the co-precipitation method. They were pure and crystalline with an average crystallite size of 5–6 nm. In the UV-vis study, the maximum absorbance for MnO2 nps was observed around 260 nm. The maximum absorbance for AFB1 and OchA was observed at 365 and 380 nm, respectively, and its intensity enhanced with the addition of MnO2 nps. Sequential changes were observed with varying the concentration of AFB1 and OchA with a fixed concentration of MnO2 nps, resulting in proper interaction. The binding constant (kb) and Gibbs free energy for MnO2 nps-AFB1 and OchA were observed as 1.62 × 104 L g−1 and 2.67 × 104 L g−1, and −24.002 and −25.256 kJ/mol, respectively. The limit of detection for AFB1 and OchA was measured as 4.08 and 10.84 ng/ml, respectively. This bio‐active free direct sensing approach of AFB1 and OchA sensing can be promoted as a potential analytical tool to estimate food quality rapidly and affordable manner at the point of use.

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Dimanganese trioxide (Mn2O3) based label-free electrochemical biosensor for detection of Aflatoxin-B1

Cited by 48 publications

References 34 publications

Optical and Structural Properties of Manganese‐Doped Zinc Oxide Grown by Metal‐Organic Chemical Vapor Deposition

Optical and Structural Properties of Manganese‐Doped Zinc Oxide Grown by Metal‐Organic Chemical Vapor Deposition

Electrochemical studies of biofunctionalized MoS₂ matrix for highly stable immobilization of antibodies and detection of lung cancer protein biomarker

Bio-Active Free Direct Optical Sensing of Aflatoxin B1 and Ochratoxin A Using a Manganese Oxide Nano-System

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Dimanganese trioxide (Mn2O3) based label-free electrochemical biosensor for detection of Aflatoxin-B1

Cited by 48 publications

References 34 publications

Optical and Structural Properties of Manganese‐Doped Zinc Oxide Grown by Metal‐Organic Chemical Vapor Deposition

Optical and Structural Properties of Manganese‐Doped Zinc Oxide Grown by Metal‐Organic Chemical Vapor Deposition

Electrochemical studies of biofunctionalized MoS2 matrix for highly stable immobilization of antibodies and detection of lung cancer protein biomarker

Bio-Active Free Direct Optical Sensing of Aflatoxin B1 and Ochratoxin A Using a Manganese Oxide Nano-System

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Electrochemical studies of biofunctionalized MoS₂ matrix for highly stable immobilization of antibodies and detection of lung cancer protein biomarker