Nanomaterial-based sensors as potential remedy for detection of biotoxins

Jigyasa,; Rajput, Jaspreet Kaur

doi:10.1016/j.foodcont.2021.108686

Cited by 14 publications

(8 citation statements)

References 123 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To determine the sensitivity of RH-DMAC for the detection of Au 3+ , Stern−Volmer (SV) plots were made. 47 The S−V equation was used to quantify the quenching behavior of the prepared nanoaggregates toward Au 3+ . 48 F F K / Au 1…”

Section: Determination Of the Stern−volmer Constantmentioning

confidence: 99%

“…In order to investigate the binding stoichiometry between the proposed chemosensors and Au 3+ , Job's continuous variation method was employed here. 47 The experiment was performed by measuring the emission intensity of several solutions in which the concentrations of Au 3+ and chemosensors were adjusted separately, but the sum of their concentration was held constant at 10 nM. Figure 2a illustrates that a significant change in fluorescence emission intensity was recorded when the mole fraction of Au 3+ approached to 0.5, demonstrating the formation of a 1:1 stoichiometric complex between RH-DMAC and Au 3+ .…”

Section: Binding Interaction Studymentioning

confidence: 99%

“…Furthermore, in order to confirm the stoichiometric complex formation proportion and to calculate the association constant (K a ), the Benesi−Hildebrand plots were also drawn. 47 The Benesi−Hildebrand equation is expressed as follows:…”

Section: Binding Interaction Studymentioning

confidence: 99%

See 2 more Smart Citations

AIEE Active Azomethine-Based Rhodamine Derivative For Ultrasensitive Multichannel Detection of Au³⁺ Through a Fluorimetrically, Electrochemically, and RGB-Based Sensing Assay

et al. 2023

View full text Add to dashboard Cite

In this study, a novel rhodamine-based optically and electrochemically active chemosensor, integrated with a p-DMAC moiety, demonstrated extremely selective identification of Au3+ ions relative to other metal species, including (Li+, Na+, K+, Ba2+, Ca2+, Mg2+, Co2+, Mn2+, Zn2+, Pb2+, Ni2+, Fe2+, Hg2+, Fe3+, Cd2+, Pd2+, Al3+, Cr3+, Cu2+, and nitrate salt of Ag+). These compounds demonstrated a novel and outstanding aggregation-induced emission enhancement (AIEE) behavior by aggregating in DMF/H2O medium. Furthermore, the degree of quenching was varying linearly with a Au3+ concentration from 0 to 40 nM, with a lower detection limit by RH-DMAC nanoaggregates of 118.79 picomolar (40.35 ppm). The Stern–Volmer plots, Job’s plot, Benesi–Hildebrand plot, 1H NMR titrations, ESI-mass, and FTIR all revealed significant interactions between the sensor and Au3+. Moreover, the proposed electrochemical sensor afforded a linear correlation before the peak current and concentration of Au3+ in the range of 0–40 nM, with a detection limit of 483.73 pM or 164.36 ppt (by cyclic voltammetry method) and 298.0 pM or 101.24 ppt (by the Differential Pulse Voltammetry method). Furthermore, the proposed sensing assay was used to measure Au3+ ion in spiked water samples (tap, drinking, waste, and river water), achieving acceptable accuracy and precision with high recovery rates. Furthermore, RH-DMAC-coated fluorescence paper test strips were designed for on-site Au3+ detection. Apart from this, the use of smartphone-based RGB (Red Green Blue) color analysis shortened the operating process, accelerated the detection technique, and provided a novel methodology for the instantaneous, real-time examination of Au3+ in real water samples.

show abstract

Section: Determination Of the Stern−volmer Constantmentioning

confidence: 99%

Section: Binding Interaction Studymentioning

confidence: 99%

See 1 more Smart Citation

AIEE Active Azomethine-Based Rhodamine Derivative For Ultrasensitive Multichannel Detection of Au³⁺ Through a Fluorimetrically, Electrochemically, and RGB-Based Sensing Assay

et al. 2023

View full text Add to dashboard Cite

show abstract

“…This interaction inhibits the formation of nanoparticles as there are fewer available active sites for reducing the ions to particles. 35,36 The accuracy of the results was confirmed through triplicate experiments using melamine-spiked milk samples. Consistent findings were observed in all cases, demonstrating a uniform limit of detection (LOD) and high repeatability.…”

Section: Characterizations Of the Synthesized Nanoparticlesmentioning

confidence: 71%

One-Pot Interference-Based Colorimetric Detection of Melamine in Raw Milk via Green Tea-Modified Silver Nanostructures

Das,

Biswas,

Mazumder

2024

ACS Omega

View full text Add to dashboard Cite

Detection of melamine has proven to be a challenge, requiring the use of complex analytical techniques. This study introduces an innovative, straightforward one-pot technique for qualitative assessment of the milk adulterant melamine. Originally, silver nanoparticles (AgNPs) were synthesized by utilizing green tea extract, which acted as both a reducing and sensing element. The synthesized AgNPs were characterized using UV–vis spectroscopy, X-ray diffraction, zeta potential, transmission electron microscopy, field emission scanning electron microscopy, and Fourier transform infrared spectroscopy. Melamine, rich in –NH2 groups, interacts with the biopolyphenols of green tea extract through hydrogen bonding. This interaction inhibits the formation of nanoparticles, resulting in a noticeable colorimetric response. The data obtained were confirmed by a standard UV–vis spectrophotometer and validated by the high-performance liquid chromatography technique. The limit of detection achieved by this scheme was quite low, falling below the permissible levels recommended by government bodies, e.g., the Food Safety and Standards Authority of India (FSSAI).

show abstract

“…Natural toxins, also known as biotoxins, are typically peptides, small non-proteinaceous molecules, or proteins derived from natural sources such as plants, microbes (bacteria, fungi, viruses, and protozoans), and animals [ 153 ]. Biotoxins have repeatedly been linked to rising cancer incidence and mortality rates in many countries.…”

Section: Stimulus-responsive Dna Hydrogel Biosensors For Food Safety ...mentioning

confidence: 99%

Stimulus-Responsive DNA Hydrogel Biosensors for Food Safety Detection

Wang

Lai

et al. 2023

Biosensors

View full text Add to dashboard Cite

Food safety has always been a major global challenge to human health and the effective detection of harmful substances in food can reduce the risk to human health. However, the food industry has been plagued by a lack of effective and sensitive safety monitoring methods due to the tension between the cost and effectiveness of monitoring. DNA-based hydrogels combine the advantages of biocompatibility, programmability, the molecular recognition of DNA molecules, and the hydrophilicity of hydrogels, making them a hotspot in the research field of new nanomaterials. The stimulus response property greatly broadens the function and application range of DNA hydrogel. In recent years, DNA hydrogels based on stimulus-responsive mechanisms have been widely applied in the field of biosensing for the detection of a variety of target substances, including various food contaminants. In this review, we describe the recent advances in the preparation of stimuli-responsive DNA hydrogels, highlighting the progress of its application in food safety detection. Finally, we also discuss the challenges and future application of stimulus-responsive DNA hydrogels.

show abstract

Nanomaterial-based sensors as potential remedy for detection of biotoxins

Cited by 14 publications

References 123 publications

AIEE Active Azomethine-Based Rhodamine Derivative For Ultrasensitive Multichannel Detection of Au³⁺ Through a Fluorimetrically, Electrochemically, and RGB-Based Sensing Assay

AIEE Active Azomethine-Based Rhodamine Derivative For Ultrasensitive Multichannel Detection of Au³⁺ Through a Fluorimetrically, Electrochemically, and RGB-Based Sensing Assay

One-Pot Interference-Based Colorimetric Detection of Melamine in Raw Milk via Green Tea-Modified Silver Nanostructures

Stimulus-Responsive DNA Hydrogel Biosensors for Food Safety Detection

Contact Info

Product

Resources

About

Nanomaterial-based sensors as potential remedy for detection of biotoxins

Cited by 14 publications

References 123 publications

AIEE Active Azomethine-Based Rhodamine Derivative For Ultrasensitive Multichannel Detection of Au3+ Through a Fluorimetrically, Electrochemically, and RGB-Based Sensing Assay

AIEE Active Azomethine-Based Rhodamine Derivative For Ultrasensitive Multichannel Detection of Au3+ Through a Fluorimetrically, Electrochemically, and RGB-Based Sensing Assay

One-Pot Interference-Based Colorimetric Detection of Melamine in Raw Milk via Green Tea-Modified Silver Nanostructures

Stimulus-Responsive DNA Hydrogel Biosensors for Food Safety Detection

Contact Info

Product

Resources

About

AIEE Active Azomethine-Based Rhodamine Derivative For Ultrasensitive Multichannel Detection of Au³⁺ Through a Fluorimetrically, Electrochemically, and RGB-Based Sensing Assay

AIEE Active Azomethine-Based Rhodamine Derivative For Ultrasensitive Multichannel Detection of Au³⁺ Through a Fluorimetrically, Electrochemically, and RGB-Based Sensing Assay