Gold and silver nanoparticles and indicator dyes as active agents in colorimetric spot and strip tests for mercury(II) ions: a review

Fitri, Zarlaida; Adlim, Muhammad

doi:10.1007/s00604-016-1967-4

Cited by 89 publications

(23 citation statements)

References 108 publications

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“…Fascinating electronic, optical, and chemical properties of gold (Au) and silver (Ag) nanoparticles (NPs), have received increasing care from the past decade and making them appropriate in a wide range of applications . In particular, they show characteristic size, shape, and composition dependent properties that are different from their bulk forms especially with the most significant catalytic properties observed when the particle size is in sub‐10 nm .…”

Section: Introductionmentioning

confidence: 99%

One‐step Synthesis of AuAg Alloy Nanodots and its Electrochemical Studies towards Nitrobenzene Reduction and Sensing

et al. 2017

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Efficient, stable, and low-cost electrocatalysts for the degradation and sensing of environment pollutants are essential components of clean environment monitoring. Here we report, one-step synthesis and characterization of 1-3 nm diameter sized bi-metallic AuAg nanodots (NDs) embedded in amine functionalized silicate solgel matrix (SSG) and its electrochemical studies toward nitrobenzene. The SSG was used as a reducing agent as well as stabilizer for the prepared mono-and bi-metallic nanoparticles (NPs). From the HRTEM, STEM-EDS and XPS analyses, the bi-metallic AuAg NDs were identified as an alloy and not the mixtures of Au and Ag NPs.Characteristic surface plasmon resonance (SPR) band between the Au and Ag NPs SPR absorption region was noticed for the prepared AuAg NDs. The AuAg alloy NDs with different concentrations of Au and Ag (Au 25 Ag 75 , Au 50 Ag 50 and Au 75 Ag 25 NDs) modified electrodes exhibited synergistic electrocatalytic effect than did the Au and Ag NPs towards nitrobenzene reduction and detection. Together with ultra-small size and exceptional colloidal stability features within these SSG-AuAg NDs pave convenient way for nanotechnology-based catalysts development and sensor applications.

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Section: Introductionmentioning

confidence: 99%

One‐step Synthesis of AuAg Alloy Nanodots and its Electrochemical Studies towards Nitrobenzene Reduction and Sensing

et al. 2017

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“…Dyes can be conjugated on the surface of these particles as demonstrated with the Fuchsin dye thus obviating the need of optimization of the whole process. In addition, various indicator dyes, such as in our case with Fuchsin, can be conjugated to EfSINPs reported here and employed for monitoring physicochemical properties like solution pH [65,66]. Nanoparticle conjugated dyes can also be employed for developing lateral flow assays [66].…”

Section: Antibody Conjugation and Immunoassay Performancementioning

confidence: 99%

Novel epoxy-silica nanoparticles to develop non-enzymatic colorimetric probe for analytical immuno/bioassays

Dixit

Bhakta

Macharia

et al. 2018

Analytica Chimica Acta

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We have developed a novel method to develop epoxy silica nanoparticles (EfSiNP) in a single pot. High surface coverage of epoxy functional groups between 150 and 57000 molecules per particles (∼10-10 molecules/mL of 200 nm EfSiNPs) was achieved for different preparation conditions. We then created a red colored probe by conjugating Fuchsin dye to the epoxy functionalities of EfSINPs. Anti-mouse IgG was co-immobilized with Fuchsin and their ratios were optimized for achieving optimum ratios by testing those in functional assays. Dye to antibody ratios were in good negative correlation with a coefficient of -1.00 measured at a confidence level of over 99%. We employed the developed non-enzymatic colorimetric immunonanoprobe for detecting mouse IgG in a direct immunoassay format. We achieved a sensitivity of 427 pg/mL with the assay.

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“…The first step that must be taken before removing antibiotic pollutants is to detect their presence. Several methods have been developed including high performance liquid chromatography-mass spectra (HPLC-MS) [4], enzyme-linked immunosorbent assays (ELISA) [5], surface-enhanced Raman scattering (SERS), electrochemistry, and colorimetry [6]. These methods require complicated instruments, high costs, and a long process.…”

Section: Introductionmentioning

confidence: 99%

A Review of Carbon dots (CDs) Application in Sensing and Removing Medical Waste

et al. 2020

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Carbon dots materials (CDs) have the capability in the management of medical waste problem because of its advantage in the detection and degradation of pollutants. The synthesized CDs through various processes and raw materials have been applied to medical wastes, especially antibiotics such as tetracycline (TC), amoxicillin (AMX), para-Nitrophenol (p-NP), doxycycline (DC), ciprofloxacin (CIP), and oxytetracycline (OTC). These antibiotics are detected by utilizing changes in the luminescence property of CDs from the turn-off and turn-on mechanisms. Afterward, the degradation process is conducted using CDs as support materials agent semiconductors in the photosynthesis scheme. In general, CDs can be referred to as multifunction smart materials with the ability to detecting the presence of the antibiotics in simple, sensitive, and selective ways, and potency of medical pollutant removal clearly and effectively.

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Gold and silver nanoparticles and indicator dyes as active agents in colorimetric spot and strip tests for mercury(II) ions: a review

Cited by 89 publications

References 108 publications

One‐step Synthesis of AuAg Alloy Nanodots and its Electrochemical Studies towards Nitrobenzene Reduction and Sensing

One‐step Synthesis of AuAg Alloy Nanodots and its Electrochemical Studies towards Nitrobenzene Reduction and Sensing

Novel epoxy-silica nanoparticles to develop non-enzymatic colorimetric probe for analytical immuno/bioassays

A Review of Carbon dots (CDs) Application in Sensing and Removing Medical Waste

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