Quantitative remote and on-site Hg2+ detection using the handheld smartphone based optical fiber fluorescence sensor (SOFFS)

Liu, Ting; Wang, Wenqi; Jian, Dan; Li, Jiahao; Ding, He; Yi, Dingrong; Liu, Fei; Wang, Shouyu

doi:10.1016/j.snb.2019.127168

Cited by 52 publications

(26 citation statements)

References 44 publications

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“…In its elemental form, mercury can cross the lipid bilayer and enter living cells [ 8 ]. Various analytical methods have been used for the detection of mercury ions—e.g., electrochemical [ 9 , 10 , 11 ], fluorescence [ 12 , 13 , 14 ], and colorimetric methods [ 15 , 16 ]. The colorimetric methods are relatively cheaper, with high sensitivity and accuracy representing a change in concentration of the analyte by a color change.…”

Section: Introductionmentioning

confidence: 99%

Novel Carboxylic Acid-Capped Silver Nanoparticles as Antimicrobial and Colorimetric Sensing Agents

et al. 2022

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The present work reports the synthesis, characterization, and antimicrobial activities of adipic acid-capped silver nanoparticles (AgNPs@AA) and their utilization for selective detection of Hg2+ ions in an aqueous solution. The AgNPs were synthesized by the reduction of Ag+ ions with NaBH4 followed by capping with adipic acid. Characterization of as-synthesized AgNPs@AA was carried out by different techniques, including UV–Visible spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), X-ray diffraction (XRD), Dynamic Light Scattering (DLS), and zeta potential (ZP). In the UV–Vis absorption spectrum, the characteristic absorption band for AgNPs was observed at 404 nm. The hydrodynamic size of as-synthesized AgNPs was found to be 30 ± 5.0 nm. ZP values (−35.5 ± 2.4 mV) showed that NPs possessed a negative charge due to carboxylate ions and were electrostatically stabilized. The AgNPs show potential antimicrobial activity against clinically isolated pathogens. These AgNPs were found to be selectively interacting with Hg2+ in an aqueous solution at various concentrations. A calibration curve was constructed by plotting concentration as abscissa and absorbance ratio (AControl − AHg/AControl) as ordinate. The linear range and limit of detection (LOD) of Hg2+ were 0.6–1.6 μM and 0.12 μM, respectively. A rapid response time of 4 min was found for the detection of Hg2+ by the nano-probe. The effect of pH and temperature on the detection of Hg2+ was also investigated. The nano-probe was successfully applied for the detection of Hg2+ from tap and river water

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Section: Introductionmentioning

confidence: 99%

Novel Carboxylic Acid-Capped Silver Nanoparticles as Antimicrobial and Colorimetric Sensing Agents

et al. 2022

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“…Optical sensing has recently been demonstrated to be a possible answer to such a great demand for friendly and affordable methods for Cr(VI) monitoring. Based on optical colorimetric and/or fluorometric responses, it is possible to envisage applications of cheap and disposable paper-based detection, miniaturized lab-on-chip (LOC) technology and cost-effective handheld smartphone-based devices [ 7 ]. Moreover, optical sensing is easily feasible in water assays, the natural media for chromium contamination and the base for microfluidic systems, which allow sampling on a sub-milliliter scale [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Colorimetric Detection of Chromium(VI) Ions in Water Using Unfolded-Fullerene Carbon Nanoparticles

Babazadeh

Bisauriya

Carbone

et al. 2021

Sensors

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Water pollution caused by hexavalent chromium (Cr(VI)) ions represents a serious hazard for human health due to the high systemic toxicity and carcinogenic nature of this metal species. The optical sensing of Cr(VI) through specifically engineered nanomaterials has recently emerged as a versatile strategy for the application to easy-to-use and cheap monitoring devices. In this study, a one-pot oxidative method was developed for the cage opening of C60 fullerene and the synthesis of stable suspensions of N-doped carbon dots in water–THF solutions (N-CDs-W-THF). The N-CDs-W-THF selectively showed variations of optical absorbance in the presence of Cr(VI) ions in water through the arising of a distinct absorption band peaking at 550 nm, i.e., in the transparency region of pristine material. Absorbance increased linearly, with the ion concentration in the range 1–100 µM, thus enabling visual and ratiometric determination with a limit of detection (LOD) of 300 nM. Selectivity and possible interference effects were tested over the 11 other most common heavy metal ions. The sensing process occurred without the need for any other reactant or treatment at neutral pH and within 1 min after the addition of chromium ions, both in deionized and in real water samples.

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“…Focusing on pollution-related issues, nanomaterial-based sensors have recently demonstrated to be promising candidates for the development of simple, environmentally friendly, and affordable methods for HM monitoring, as well as radiation-absorbing materials to be employed to fight electromagnetic pollution [10]. Based on colorimetric and fluorometric responses, optical sensing is compatible with water solutions and is suitable for applications in a variety of portable systems, ranging from cheap paper-based detection to cost-effective handheld smartphonebased devices [11]. Graphene-like carbon-based nanoparticles, generally referred to as carbon dots (CDs), have recently been investigated for their sensitivity to several analytes, including neutral molecules [12] and HM ions, coupled with high stability and very low toxicity [13,14].…”

Section: Introductionmentioning

confidence: 99%

Detection of Heavy Metals in Water Using Graphene Oxide Quantum Dots: An Experimental and Theoretical Study

et al. 2021

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In this work, we investigate by ab initio calculations and optical experiments the sensitivity of graphene quantum dots in their use as devices to measure the presence, and concentration, of heavy metals in water. We demonstrate that the quenching or enhancement in the optical response (absorption, emission) depends on the metallic ion considered. In particular, two cases of opposite behaviour are considered in detail: Cd2+, where we observe an increase in the emission optical response for increasing concentration, and Pb2+ whose emission spectra, vice versa, are quenched along the concentration rise. The experimental trends reported comply nicely with the different hydration patterns suggested by the models that are also capable of reproducing the minor quenching/enhancing effects observed in other ions. We envisage that quantum dots of graphene may be routinely used as cheap detectors to measure the degree of poisoning ions in water.

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Quantitative remote and on-site Hg2+ detection using the handheld smartphone based optical fiber fluorescence sensor (SOFFS)

Cited by 52 publications

References 44 publications

Novel Carboxylic Acid-Capped Silver Nanoparticles as Antimicrobial and Colorimetric Sensing Agents

Novel Carboxylic Acid-Capped Silver Nanoparticles as Antimicrobial and Colorimetric Sensing Agents

Colorimetric Detection of Chromium(VI) Ions in Water Using Unfolded-Fullerene Carbon Nanoparticles

Detection of Heavy Metals in Water Using Graphene Oxide Quantum Dots: An Experimental and Theoretical Study

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