Ultra-sensitive direct detection of silver ions via Kelvin probe force microscopy

Park, Jinsung; Lee, Sangmyung; Jang, Kuewhan; Na, Sungsoo

doi:10.1016/j.bios.2014.04.038

Cited by 34 publications

(19 citation statements)

References 38 publications

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“…Consequently, determination of Ag + at trace level in water has remained a very important task for many researchers for health and economical reasons. Already, various techniques such as inductive couple plasma mass spectrometric methods (ICP-MS) [9], stripping voltammetry [10], atomic emission and electrochemical methods [11], and stripping and Kelvin force probe microscopic methods [12] have been reportedly used for the detection of silver ion at trace level. But these methods require lengthy sample preparation, hazardous chemicals, sophisticated instruments, and need trained operators.…”

Section: Introductionmentioning

confidence: 99%

Application of synthesized copper nanoparticles using aqueous extract of Ziziphus mauritiana L. leaves as a colorimetric sensor for the detection of Ag+

Memon¹,

Memon²,

Sherazi³

et al. 2020

Turk J Chem

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The presented work demonstrates the preparation of copper nanoparticles (CuNPs) via aqueous leaves extract of Ziziphus mauritiana L. (Zm) using hydrazine as a reducing agent. Various parameters such as volume of extract, concentration of hydrazine hydrate, concentration of copper chloride, and pH of the solution were optimized to obtain Ziziphus mauritiana L. leaves extract derived copper nanoparticles (Zm-CuNPs). Brownish red color was initial indication of the formation of Zm-CuNPs while it was confirmed by surface plasmon resonance (SPR) band at wavelength of 584 nm using ultraviolet-visible (UV-vis) spectroscopy. Synthesized Zm-CuNPs were characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), atomic force microscopy (AFM), and X-ray diffractometry (XRD). AFM images showed that the particle size of Zm-CuNPs was from 7 to 17 nm with an average size of 11.3 nm. Fabricated sensor (Zm-CuNPs) were used as a colorimetric sensor for the detection of Ag+ at a linear range between 0.67 × 10–6 – 9.3 × 10–6 with R2 value of 0.992. For real water samples, limit of quantification (LOQ) and limit of detection (LOD) for Ag+ was found to be 330 × 10–9 and 100 × 10–9, respectively.

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Section: Introductionmentioning

confidence: 99%

Application of synthesized copper nanoparticles using aqueous extract of Ziziphus mauritiana L. leaves as a colorimetric sensor for the detection of Ag+

Memon¹,

Memon²,

Sherazi³

et al. 2020

Turk J Chem

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show abstract

“…Conventional analytical methods for Ag + assay in aqueous media include atomic absorption/emission spectroscopy, inductively coupled plasma-mass spectroscopy (ICPMS) and so on 11 12 . More recently, a diversity of techniques have also been applied for the analytical purposes, such as voltammetry, chronocoulometry, microscope, fluorescent and colorimetric methods 13 14 15 16 17 18 19 .…”

mentioning

confidence: 99%

Electrochemical detection of aqueous Ag+ based on Ag+-assisted ligation reaction

Han

Wang

Luo

et al. 2015

Sci Rep

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In this work, a novel strategy to fabricate a highly sensitive and selective biosensor for the detection of Ag+ is proposed. Two DNA probes are designed and modified on a gold electrode surface by gold-sulfur chemistry and hybridization. In the presence of Ag+, cytosine-Ag+-cytosine composite forms and facilitates the ligation event on the electrode surface, which can block the release of electrochemical signals labeled on one of the two DNA probes during denaturation process. Ag+ can be sensitively detected with the detection limit of 0.1 nM, which is much lower than the toxicity level defined by U.S. Environmental Protection Agency. This biosensor can easily distinguish Ag+ from other interfering ions and the performances in real water samples are also satisfactory. Moreover, the two DNA probes are designed to contain the recognition sequences of a nicking endonuclease, and the ligated DNA can thus be cleaved at the original site. Therefore, the electrode can be regenerated, which allows the biosensor to be reused for additional tests.

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“…They based the expected charge pattern measurements on individual DNA molecules and proteins after further refinements. The metal ion detection is based on the surface potential change at ionic adsorption, e.g., Hg 2+ ion detection by formation of thymine-Hg 2+ -thymine at a detection limit of 2 fmol [38], Ag + ion detection by formation of cytosine-Ag + -cytosine at a detection limit of 20 fmol, as schematically shown in Figure 2e [39], and Al 3+ ion detection by exposure to citrated AuNPs at a detection limit of 2 amol, as shown in Figure 2f [40]. The material difference between the substrate and nanoparticles favors specific surface chemistry for potential measurements-e.g., thiol chemistry works on Au, but not on silicon substrate.…”

Section: Kelvin Probe Force Microscopy (Kfm)mentioning

confidence: 99%

“…When a chemFET is immersed in an electrolyte, the electrostatic gating through the liquid and gate dielectric layer, generally named liquid-gating, modifies the carrier mobility in the transistor, as , and in the bottom graph, the red line represents the topography for fibril, and the green line represents the surface potential [30]; (b) the morphology and contact potential difference for metal contacts on SiO 2 surface for unbiased and biased sample [34]; (c) recognition of single-molecule interaction between protein and small ligands [35]; (d) DNA on a gold nanoparticle (AuNP) for mutation study by comparing the height and surface potential signals [36]; (f) single-molecule detection of avidin molecules and DNA [37]; (e) Ag + ion adsorption to aptamers [39]; and (f) Al 3+ ion detection on citrated AuNPs [40].…”

Section: Chemical Field Effect Transistor (Chemfet)-based Potential Smentioning

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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Ultra-sensitive direct detection of silver ions via Kelvin probe force microscopy

Cited by 34 publications

References 38 publications

Application of synthesized copper nanoparticles using aqueous extract of Ziziphus mauritiana L. leaves as a colorimetric sensor for the detection of Ag+

Application of synthesized copper nanoparticles using aqueous extract of Ziziphus mauritiana L. leaves as a colorimetric sensor for the detection of Ag+

Electrochemical detection of aqueous Ag+ based on Ag+-assisted ligation reaction

Surface Potential/Charge Sensing Techniques and Applications

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