Fluorescent detection of dipicolinic acid as a biomarker in bacterial spores employing terbium ion-coordinated magnetite nanoparticles

Koo, Thomas Myeongseok; Ko, Min Jun; Park, Bum Chul; Kim, Myeong Soo; Kim, Young Keun

doi:10.1016/j.jhazmat.2020.124870

Cited by 22 publications

(13 citation statements)

References 46 publications

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“…In addition to the lengthy analysis time, these methods suffer from low sensitivity ( Paulus 1981 ; Dworzanski et al, 1997 ). Recently, colorimetric and fluorescent methods have attracted increasing attention owing to their simplicity and visibility ( Yang et al, 2020 ; Koo et al, 2021 ). Complexing DPA with Tb 3+ or Eu 3+ is one of the most commonly used strategies ( Yilmaz et al, 2010 ; Na et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Contactless and robust dielectric microspheres-assisted surface-enhanced Raman scattering sensitivity improvement for anthrax biomarker detection

Zhao

Han

et al. 2022

Front. Chem.

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This report presents a contactless and robust dielectric microspheres (DMs)-assisted surface enhanced Raman scattering (SERS) enhancement method to improve SERS detection sensitivity detection sensitivity. DMs that could focus and collect light were embedded within the polydimethylsiloxane (PDMS) film to avoid direct contact with the analytical solution and improve detection reliability. The as prepared DMs embedded PDMS DMs PD MS film was integrated with a microfluidic technique to enhance the SERS signal of a liquid substrate. Detection in microfluidic systems can reduce reagent consumption, shorten assay time, and avoid evaporation of the colloid substrate solution. The robustness and potential influencing factors of DMs PDMS film assisted SERS enhancement (DERS) were evaluated using 4-aminothiophenol (4-ATP) as the Raman probe. The sensing performance of the proposed method toward dipicolinic acid (DPA) was evaluated, and an evident signal intensification was obtained. Remarkably, the DMs PDMS film can also be implemented on solid substrates. A proof-of-concept experiment was performed by covering the DMs PDMS film directly over an AgNPs@Si solid substrate wherein a 5.7-fold sensitivity improvement was achieved.

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Section: Introductionmentioning

confidence: 99%

Contactless and robust dielectric microspheres-assisted surface-enhanced Raman scattering sensitivity improvement for anthrax biomarker detection

Zhao

Han

et al. 2022

Front. Chem.

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“…Due to these merits, lanthanide luminescent materials have been widely studied in chemical and biological sensing systems [21][22][23]. In recent years, the development of lanthanide luminescent fluorescent probes for guest molecule (e.g., anions, cations, biomolecules) recognition has become an emerging field [24][25][26][27]. Our group has been devoted to the preparation of lanthanide hybrid materials and sensing applications, and the rapid development for the achievement of specific lanthanide sensors has been reported [28][29][30].…”

Section: Nitrite (Nomentioning

confidence: 99%

Lanthanide Molecular Species Generated Fe3O4@SiO2-TbDPA Nanosphere for the Efficient Determination of Nitrite

Qin

Chen

et al. 2022

Molecules

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The presence of nitrite (NO2−) in water and food leads to serious problems in public health and the environment. Therefore, it is important to develop a rapid and efficient method for the selective detection of NO2−. In this work, the synthesis and characterization of magnetic Fe3O4@SiO2-TbDPA nanoprobe have been carried out. The Fe3O4@SiO2-TbDPA aqueous solution exhibits a strong green emission. Due to the addition of various concentrations of NO2− (0–100 μM), the fluorescence intensity has been suppressed. The nanoprobe Fe3O4@SiO2-TbDPA exhibits excellent selectivity and sensitivity toward NO2− ions. Excellent linearity is obtained in the range of 5–80 μM with a detection limit of 1.03 μM. Furthermore, the presence of magnetic Fe3O4 nanoparticles in Fe3O4@SiO2-TbDPA nanospheres will also facilitate the effective separation of Fe3O4@SiO2-TbDPA from the aqueous solution. Our proposed strategy is expected to fabricate an organic-inorganic hybrid magnetic nanomaterial and can be used as an efficient sensor. It has been shown that this new strategy has numerous advantages, such as high stability, selectivity, and simplicity of operation. It demonstrates great potential for simple and convenient NO2− detection. It may expand to a variety of ranges in environmental monitoring and biomedical fields.

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“…25,26 Then, the ratiometric detection of DPA can be realized by introducing another fluorescent material into the emission system. Based on this mechanism, various ratiometric fluorescent DPA nanosensors have been constructed using nanomicelles, 27 carbon dots, 21,28 metalorganic frameworks (MOF), 2,3,[29][30][31][32] quantum dots 33 and polymers 10,[34][35][36] as the reference signal. Although these ratiometric fluorescent nanosensors can achieve selective and sen-sitive DPA detection in aqueous solutions, they generally fail to achieve stable ratiometric detection in complex environments or biological systems, which is due to the fact that the reference signal units cannot form a strong bond with the host material and suffer from the degradation or leaching of active species over a long period of application.…”

Section: Introductionmentioning

confidence: 99%

Smart intercalation and coordination strategy to construct stable ratiometric fluorescence nanoprobes for the detection of anthrax biomarker

Niu

Wang

Zhang

et al. 2022

Inorg. Chem. Front.

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Fluorescent detection of dipicolinic acid as a biomarker in bacterial spores employing terbium ion-coordinated magnetite nanoparticles

Cited by 22 publications

References 46 publications

Contactless and robust dielectric microspheres-assisted surface-enhanced Raman scattering sensitivity improvement for anthrax biomarker detection

Contactless and robust dielectric microspheres-assisted surface-enhanced Raman scattering sensitivity improvement for anthrax biomarker detection

Lanthanide Molecular Species Generated Fe3O4@SiO2-TbDPA Nanosphere for the Efficient Determination of Nitrite

Smart intercalation and coordination strategy to construct stable ratiometric fluorescence nanoprobes for the detection of anthrax biomarker

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