Ultrasensitive determination of mercury(II) using glass nanopores functionalized with macrocyclic dioxotetraamines

Gao, Rui; Ying, Yi‐Lun; Yan, Binbin; Iqbal, Parvez; Preece, Jon A.; Wu, Xin‐Yan

doi:10.1007/s00604-015-1634-1

Cited by 28 publications

(20 citation statements)

References 30 publications

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“…[17] Furthermore, magnetron sputtering and ion/electron beam evaporation methods with ionic metal vapor have been employed to uniformly coat al ayer of nanometer-thick metal along the inside and outside surfaces of nanopipettes. [18][19][20] Forexample, focused ion beam microscopy has shown that the ion beam evaporation method can provide am icrometer-long metal layer with at hickness of 10 nm inside a9 0nmn anopipette ( Figure 1d). [19] Them etal layer inside/outside the nanopore not only ensures the interface for faraday reactions but also offers ar eactive surface for the further modification of analytes.B yi ncorporation of Au À Sb onds,a na-fetoprotein antibody was immobilized onto agold-coated nanopipette for monitoring kinetic antigen-antibody interactions.…”

Section: The Fabrication and Characterization Of Nanopipettesmentioning

confidence: 99%

Confined Nanopipette Sensing: From Single Molecules, Single Nanoparticles, to Single Cells

et al. 2018

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Nanopipette provides a promising confined space, which exhibits advances in electrochemical, optical and mass spectrometric measurements at the nanoscale. It has been employed to reveal the hidden population properties and dynamics of single molecules and single particles. Moreover, new detection mechanisms developed on nanopipette lead to the discovery of detailed single cell information at high spatial and high temporal resolution. Herein, we focus on the fabrication and characterization of nanopipettes, summarize their wide applications for single entity analysis, and conclude with an outlook for advanced practical sensing.

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Section: The Fabrication and Characterization Of Nanopipettesmentioning

confidence: 99%

Confined Nanopipette Sensing: From Single Molecules, Single Nanoparticles, to Single Cells

et al. 2018

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“…the absence of any nanoparticles, the rectification ratio has been used to measure the concentration of metal ions as they interact with the pore wall itself. 47 However these assays are limited to one analyte and longer assay times. The use of nanoparticle based systems may allow for multiplexed assays and faster reaction times.…”

Section: Introductionmentioning

confidence: 99%

A tunable nanopore sensor for the detection of metal ions using translocation velocity and biphasic pulses

2016

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Citation: MAYNE, L.J., CHRISTIE, S.D.R. and PLATT, M., 2016. A tunable nanopore sensor for the detection of metal ions using translocation velocity and biphasic pulses. Nanoscale, 8, 19139-19147. Additional Information:• This paper was accepted for publication in the journal ) from solution. By tuning the pH and ionic strength of the solution, a biphasic pulse, a conductive followed by a resistive pulse is recorded. Biphasic pulses are becoming a powerful way to characterise materials, and provide an insight into the translocation mechanism, and here we present their first use to detect the presence of metal ions in solution. We demonstrate how combinations of translocation speed and/ or biphasic pulse behaviour are used to detect Cu

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“…For inner wall surface-based charge regulation, the stimulus from the solution that caused the charge change alters the I-V curve characteristics. By designing proper surface chemistry, metal ion concentrations can be measured through the current rectification ratio, e.g., crown ethers chemistry for the specific adsorption of K + ions (Figure 4a) [90], macrocyclic dioxotetraamine derivative functionalization for Hg 2+ ion determination at a level of 10 pM (Figure 4b) [91], and polyglutamic acid for repeatable Cu 2+ ion sensing [92]. The adsorption of positively charged metal ions increases the positive charge and, therefore, changes the current rectification ratio.…”

Section: Surface Charge Measurementmentioning

confidence: 99%

Surface Potential/Charge Sensing Techniques and Applications

Chen

Dong

Yang

2020

Sensors

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Surface potential and surface charge sensing techniques have attracted a wide range of research interest in recent decades. With the development and optimization of detection technologies, especially nanosensors, new mechanisms and techniques are emerging. This review discusses various surface potential sensing techniques, including Kelvin probe force microscopy and chemical field-effect transistor sensors for surface potential sensing, nanopore sensors for surface charge sensing, zeta potentiometer and optical detection technologies for zeta potential detection, for applications in material property, metal ion and molecule studies. The mechanisms and optimization methods for each method are discussed and summarized, with the aim of providing a comprehensive overview of different techniques and experimental guidance for applications in surface potential-based detection.

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Ultrasensitive determination of mercury(II) using glass nanopores functionalized with macrocyclic dioxotetraamines

Cited by 28 publications

References 30 publications

Confined Nanopipette Sensing: From Single Molecules, Single Nanoparticles, to Single Cells

Confined Nanopipette Sensing: From Single Molecules, Single Nanoparticles, to Single Cells

A tunable nanopore sensor for the detection of metal ions using translocation velocity and biphasic pulses

Surface Potential/Charge Sensing Techniques and Applications

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