Hybrid Molecular Imprinted Polymer (MIP) Electrode for Pesticide Detection of Electrochemical Sensor

Ahmad, Abdul Latif; Lah, Nuur Fahanis Che; Low, Siew Chun

doi:10.21315/jps2018.29.s1.5

Cited by 3 publications

(2 citation statements)

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“…The high toxicity of mercury electrodes makes them unfriendly for Atz determination. Other environmentally benign electrodes such as Au, Pt, boron doped electrode (BDDE), copper solid amalgam electrode (CuSAE), bismuth film electrode (BIFE), and molecular imprinted electrodes (MIP) were used for Atz detection as alternatives to mercury electrodes. ,,,,,− The electrochemical detection based on Atz oxidation was also studied . In the present study, we determined Atz using a novel method depending on the electrochemical oxidation of Atz and AgNPs aggregated by Atz.…”

Section: Introductionmentioning

confidence: 99%

Dissolved Organic Matter-Capped Silver Nanoparticles for Electrochemical Aggregation Sensing of Atrazine in Aqueous Systems

Zahran

Khalifa

Zahran

et al. 2020

ACS Appl. Nano Mater.

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An electrochemical sensor based on silver nanoparticles (AgNPs) was developed by immobilizing dissolved organic matter (DOM) to interact with AgNPs on a glassy carbon electrode (GC), forming a DOM/AgNP/GC composite. AgNPs have been fabricated and characterized using ultraviolet–visible spectroscopy, fluorescence spectroscopy, and transmission electron microscopy. The immobilization efficiency and stability of the DOM/AgNP/GC composite have been optimized through studying the effects of electrode material type, immobilization technique, sticking duration, supporting electrolyte, and pH using square wave anodic stripping voltammetry. The detection of atrazine (Atz), a common herbicide, in aqueous systems has a great significance because of its toxicity to humans and other animals. The DOM/AgNP/GC composite has been used for Atz assessment under the optimized conditions based on the aggregated and nonaggregated AgNPs. The sensor linear range is between 20 and 220 μg/L for both aggregated and nonaggregated AgNP-based sensors. Atz could also be detected on the basis of its electrochemical oxidation at DOM/AgNP/GC with a linear range of 10–140 μg/L. Both sensors have been employed for the assessment of Atz in natural water with acceptable recovery values.

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Section: Introductionmentioning

confidence: 99%

Dissolved Organic Matter-Capped Silver Nanoparticles for Electrochemical Aggregation Sensing of Atrazine in Aqueous Systems

Zahran

Khalifa

Zahran

et al. 2020

ACS Appl. Nano Mater.

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“…Consequently, BGMs@Cs-MIP-1 demonstrated high selective adsorption behavior for the template molecule (Figure4G). Ahmad et al49 created an electrochemical sensor using MIPs in a graphite felt electrode. The sensor had a high selectivity toward the atrazine template molecules and exhibited a noteworthy IF (1.2), which was equivalent to the imprinting factor observed in our research.3.4.…”

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confidence: 99%

Antibacterial and Osteogenic Doxycycline Imprinted Bioglass Microspheres to Combat Bone Infection

Khademi,

Kharaziha

2024

ACS Appl. Mater. Interfaces

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Currently, postoperative infection is a significant challenge in bone and dental surgical procedures, demanding the exploration of innovative approaches due to the prevalence of antibiotic-resistant bacteria. This study aims to develop a strategy for controlled and smart antibiotic release while accelerating osteogenesis to expedite bone healing. In this regard, temperature-responsive doxycycline (DOX) imprinted bioglass microspheres (BGMs) were synthesized. Following the formation of chitosan-modified BGMs, poly N-isopropylacrylamide (pNIPAm) was used for surface imprinting of DOX. The temperature-responsive molecularly imprinted polymers (MIPs) exhibited pH and temperature dual-responsive adsorption and controlled-release properties for DOX. The temperature-responsive MIP was optimized by investigating the molar ratio of N,N′-methylene bis(acrylamide) (MBA, the cross-linker) to NIPAm. Our results demonstrated that the MIPs showed superior adsorption capacity (96.85 mg/g at 35 °C, pH = 7) than nonimprinted polymers (NIPs) and manifested a favorable selectivity toward DOX. The adsorption behavior of DOX on the MIPs fit well with the Langmuir model and the pseudo-second-order kinetic model. Drug release studies demonstrated a controlled release of DOX due to imprinted cavities, which were fitted with the Korsmeyer–Peppas kinetic model. DOX-imprinted BGMs also revealed comparable antibacterial effects against Staphylococcus aureus and Escherichia coli to the DOX (control). In addition, MIPs promoted viability and osteogenic differentiation of MG63 osteoblast-like cells. Overall, the findings demonstrate the significant potential of DOX-imprinted BGMs for use in bone defects. Nonetheless, further in vitro investigations and subsequent in vivo experiments are warranted to advance this research.

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Minireview - Recent Developments in Electrochemical Detection of Atrazine

Comnea-Stancu

Staden

2022

Analytical Letters

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Hybrid Molecular Imprinted Polymer (MIP) Electrode for Pesticide Detection of Electrochemical Sensor

Cited by 3 publications

References 10 publications

Dissolved Organic Matter-Capped Silver Nanoparticles for Electrochemical Aggregation Sensing of Atrazine in Aqueous Systems

Dissolved Organic Matter-Capped Silver Nanoparticles for Electrochemical Aggregation Sensing of Atrazine in Aqueous Systems

Antibacterial and Osteogenic Doxycycline Imprinted Bioglass Microspheres to Combat Bone Infection

Minireview - Recent Developments in Electrochemical Detection of Atrazine

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