Molecularly imprinted photo-electrochemical sensor for hemoglobin detection based on titanium dioxide nanotube arrays loaded with CdS quantum dots
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Molecularly imprinted polymer
Photocurrent
Titanium Dioxide
Nanorod
Electrochemical gas sensor
Abstract Molecularly imprinted polymer‐modified glassy carbon electrode (GCE)‐based electrochemical sensor is prepared using the electropolymerization of aniline in the presence of melamine (MA) as a template. In this work, the advantages of molecularly imprinted conducting polymers (MICPs) and electroanalytical methods were combined to obtain an electronic device with better performances. The sensor performance was evaluated by cyclic voltammetry (CV) and square wave voltammetry (SWV) with the linear range of 0.6‐16 × 10 −9 M, quantification limit of 14.9 × 10 −10 M, and detection limit of 4.47 × 10 −10 M (S/N = 3). The selectivity of the sensor was tested in the presence of acetoguanamine (AGA), diaminomethylatrazine (DMT), casein, histidine, and glycine interfering molecules taken at the triple concentration with MA that demonstrated too small current response compared with that of the analyte indicating high specificity of the sensor towards the template. The sensor was successfully applied to determine MA in infant formula samples with significant recovery greater than 96% and relative standard deviation (RSD) less than 4.8%. Moreover, the good repeatability, recyclability, and stability make this sensor device promising for the real‐time monitoring of MA in different food stuffs.
Molecularly imprinted polymer
Electrochemical gas sensor
Repeatability
Molecular imprinting
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Molecularly imprinted polymer
Electrochemical gas sensor
Differential pulse voltammetry
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Abstract We present a novel electrochemical sensor based on an electrode modified with molecularly imprinted polymers for the detection of chlorpyrifos. The modified electrode was constructed by the synthesis of molecularly imprinted polymers by a precipitation method then coated on a glassy carbon electrode. The surface morphology of the modified electrode was characterized by using field‐emission scanning electron microscopy and transmission electron microscopy. The performance of the imprinted sensor was thoroughly investigated by using cyclic voltammetry and differential pulse voltammetry. The imprinted electrochemical sensor displayed high repeatability, stability, and selectivity towards the template molecules. Under the optimal experimental conditions, the peak current response of the imprinted electrochemical sensor was linearly related to the concentration of chlorpyrifos over the range 1 × 10 −10 –1 × 10 −5 mol/L with a limit of detection of 4.08 × 10 −9 mol/L (signal‐to‐noise ratio = 3). Furthermore, the proposed molecularly imprinted electrochemical sensor was applied to the determination of chlorpyrifos in the complicated matrixes of real samples with satisfactory results. Therefore, the molecularly imprinted polymers based electrochemical sensor might provide a highly selective, rapid, and cost‐effective method for chlorpyrifos determination and related analysis.
Molecularly imprinted polymer
Electrochemical gas sensor
Differential pulse voltammetry
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We have simulated the heating process of gold nanorods, elucidating a mechanism by which nanorods alter their aspect ratio at higher temperatures. We also studied the relative stabilities of nanorods by constructing nanorods with varying ratios of {110} to {100} exposed surfaces along the body of the nanorod. The least stable nanorod was found to be the nanorod with the largest {110} surfaces, followed by the nanorod with the largest {100} surfaces, while the nanorod with approximately equal surface areas of {100} and {110} surface was found to be the most stable. It was also found that the addition of surface disorder increased the stability of nanorods with large {110} surfaces, while paradoxically decreasing the stability of nanorods with large {100} surfaces. The reasons for this are elucidated and compared to experimental laser-induced gold nanorod transformation studies.
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Molecularly imprinted polymer
Electrochemical gas sensor
Indium tin oxide
Molecular imprinting
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The recent progress of electrochemical sensor based on molecularly imprinted sensor has been reviewed in this paper.Five methods,which employed in the preparation of electrochemical sensors based on molecularly imprinted polymers,are evaluated.
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Electrochemical gas sensor
Molecular imprinting
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Molecularly imprinted polymer
Electrochemical gas sensor
Differential pulse voltammetry
Leflunomide
Graphene-Based Sensors
Polymeric Membrane Electrodes
Sensor Development
pH Sensing
Molecular imprinting
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An electrochemical sensor based on electropolymerized molecularly imprinted polymers(MIPs) for triclosan detection is reported.The sensor was prepared by electropolymerizing o-phenylenediamine on a glassy carbon electrode in the presence of the template triclosan.Square wave voltammetry was applied to investigate the analytical characteristics of the sensor.
Molecularly imprinted polymer
Electrochemical gas sensor
Glassy carbon
Molecular imprinting
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A ratiometric molecularly imprinted polymers electrochemical sensor was fabricated based on the direct electrochemical oxidation of BHPF on CoN nanoarray electrode.
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Electrochemical gas sensor
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Molecularly imprinted polymer
Electrochemical gas sensor
Molecular imprinting
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