Curcumin based biocompatible nanofibers for lead ion detection

Sarika, Raj; Shankaran, Dhesingh Ravi

doi:10.1016/j.snb.2015.12.006

Cited by 80 publications

(45 citation statements)

References 34 publications

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“…Many heavy metal ions such as lead, mercury, arsenic and chromium are highly toxic elements which can cause a number of serious threats to human health and the environment [1,2,3,4,5]. Among all the metal ions, Pb 2+ is one of the four metals that have the most damaging effects on human health.…”

Section: Introductionmentioning

confidence: 99%

A Sensitive and Label-Free Pb(II) Fluorescence Sensor Based on a DNAzyme Controlled G-Quadruplex/Thioflavin T Conformation

Wen

Wang

et al. 2016

Sensors

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Pb(II) can cause serious damaging effects to human health, and thus, the study of Pb2+ detection methods to sensitively and selectively monitor Pb(II) pollution has significant importance. In this work, we have developed a label-free fluorescence sensing strategy based on a Pb(II) DNAzyme cleavage and the ThT/G-quadruplex complex. In the presence of Pb(II), a G-rich tail was cut and released from the substrate strand, which then would form a G-quadruplex structure by combination with ThT dye. The fluorescence signal increase was then measured for sensitive Pb(II) quantification with a limit of detection of 0.06 nM. Our sensor also demonstrated high selectivity against six different metal ions, which is very important for the analysis of complex samples.

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Section: Introductionmentioning

confidence: 99%

A Sensitive and Label-Free Pb(II) Fluorescence Sensor Based on a DNAzyme Controlled G-Quadruplex/Thioflavin T Conformation

Wen

Wang

et al. 2016

Sensors

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“…Selectivity is another important issue in sensor design as to decrease false positives. Shankaran et al designed a selective colorimetric sensor for Pb 2+ based on curcumin‐doped cellulose acetate nanofibers . The colorimetric nanofibers appeared yellow, but turned brown upon detection of lead, even in the presence of other metal ions ( Figure ).…”

Section: Colorimetric Sensors Based On Doped Nanofibersmentioning

confidence: 99%

Section: Colorimetric Sensors Based On Doped Nanofibersmentioning

confidence: 99%

Colorimetric Nanofibers as Optical Sensors

Schoolaert

Hoogenboom

Clerck

2017

Adv Funct Materials

109

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Sensors play a major role in many applications today, ranging from biomedicine to safety equipment, where they detect and warn us about changes in the environment. Nanofibers, characterized by high porosity, flexibility, and a large specific surface area, are the ideal material for ultrasensitive, fastresponding, and user-friendly sensor design. Indeed, a large specific surface area increases the sensitivity and response time of the sensor as the contact area with the analyte is enlarged. Thanks to the flexibility of membranes, nanofibrous sensors cannot only be applied in high-end analyte detection, but also in personal, daily use. Many different nanofibrous sensors have already been designed; albeit, the most straightforward and easiest-to-interpret sensor response is a visual change in color, which is of particular interest in the case of warning signals. Recently, many researchers have focused on the design of so-called colorimetric nanofibers, which typically involve the incorporation of a colorimetric functionality into the nanofibrous matrix. Many different strategies have been used and explored for colorimetric nanofibrous sensor design, which are outlined in this feature article. The many examples and applications demonstrate the value of colorimetric nanofibers for advanced optical sensor design, and could provide directions for future research in this area.

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“…Polymer nanofibers (NFs) have gained importance in varied technological applications in the last decades, due to their unique features, which include low cost of production, easy fabrication, optical transparency, flexibility, and biocompatibility . Polymer NF containing optically active dopants, such as organic dyes, noble metal nanoparticles, quantum dots, and rare earth ions (RE 3+ ), are called polymer optical NFs (PONFs), and have numerous applications in optical sensors . Among all types of optical sensors, emphasis has been given to the development of fluorescent and colorimetric sensors, aiming at improving sensor sensitivity, limit of detection (LOD), selectivity, applicability and reproducibility .…”

Section: Introductionmentioning

confidence: 99%

Polyvinylpyrrolidone electrospun nanofibers doped with Eu³⁺: Fabrication, characterization, and application in gas sensors

Terra

Sanfelice

Scagion

et al. 2019

J of Applied Polymer Sci

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Polymer nanofibers (NFs)-based optical sensors hold great potential to fabricate low-cost devices capable to monitor different volatile organic compounds (VOCs) related to healthcare and environmental conditions. For instance, ammonia detection is a subject of paramount importance, owing to the serious health problems associated to the exposition to this volatile. In this context, here, we report on the development of optical electrospun NFs composed of polyvinylpyrrolidone (PVP) doped with Europium (Eu 3+ ) aiming at the detection of ammonia. The fabricated NFs were characterized by scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, fluorescence microscopy, photoluminescence, and excited state lifetime spectroscopies. The luminescence properties changes were evaluated by exposing the PVP_Eu 3+ NFs to ammonia and other distinct interfering VOCs including toluene, tetrahydrofuran, acetone, triethylamine, acetic acid, and chloroform. The sensor exhibited a linear response to ammonia exposition in the concentration range from 0 to 50 ppm, yielding a detection limit of 4.7 ppm. Our results indicate the potential application of PVP_Eu 3+ electrospun NFs in optical sensors for ammonia detection at room temperature based on luminescence quenching.

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Curcumin based biocompatible nanofibers for lead ion detection

Cited by 80 publications

References 34 publications

A Sensitive and Label-Free Pb(II) Fluorescence Sensor Based on a DNAzyme Controlled G-Quadruplex/Thioflavin T Conformation

A Sensitive and Label-Free Pb(II) Fluorescence Sensor Based on a DNAzyme Controlled G-Quadruplex/Thioflavin T Conformation

Colorimetric Nanofibers as Optical Sensors

Polyvinylpyrrolidone electrospun nanofibers doped with Eu³⁺: Fabrication, characterization, and application in gas sensors

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Curcumin based biocompatible nanofibers for lead ion detection

Cited by 80 publications

References 34 publications

A Sensitive and Label-Free Pb(II) Fluorescence Sensor Based on a DNAzyme Controlled G-Quadruplex/Thioflavin T Conformation

A Sensitive and Label-Free Pb(II) Fluorescence Sensor Based on a DNAzyme Controlled G-Quadruplex/Thioflavin T Conformation

Colorimetric Nanofibers as Optical Sensors

Polyvinylpyrrolidone electrospun nanofibers doped with Eu3+: Fabrication, characterization, and application in gas sensors

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Product

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Polyvinylpyrrolidone electrospun nanofibers doped with Eu³⁺: Fabrication, characterization, and application in gas sensors