scholarly journals A highly sensitive and selective fluoride sensor based on a riboswitch-regulated transcription coupled with CRISPR-Cas13a tandem reaction

2021 ◽  
Author(s):  
Yuan Ma ◽  
Quanbing Mou ◽  
Peng Yan ◽  
Zhenglin Yang ◽  
Ying Xiong ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Tandem Reaction ◽  
Highly Sensitive ◽  
Sensitivity And Selectivity ◽  
Fluoride Sensor ◽  
Acid Sensors

A fluoride sensor based on riboswitch-regulated transcription coupled with Cas13a sensor can detect fluoride in water with a portable fluorometer. This sensor expands nuclei acid sensors to an anion, with high sensitivity and selectivity against other common anions.

A highly sensitive turn-on ratiometric luminescent probe based on postsynthetic modification of Tb3+@Cu-MOF for H2S detection

2017 ◽  
Vol 5 (38) ◽  
pp. 9943-9951 ◽  
Author(s):  
Xubin Zheng ◽  
Ruiqing Fan ◽  
Yang Song ◽  
Ani Wang ◽  
Kai Xing ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Luminescent Probe ◽  
Turn On ◽  
Postsynthetic Modification ◽  
Highly Sensitive ◽  
Sensitivity And Selectivity ◽  
H2s Detection

A novel probe, designed and prepared through PSM of Cu-MOFs and Tb3+ions, shows high sensitivity and selectivity for H2S.

A metal-organic framework featuring highly sensitive fluorescence sensing for Al3+ ion

CrystEngComm ◽  
2021 ◽  
Author(s):  
Yang Qiao ◽  
Zeqi Li ◽  
Mei-Hui Yu ◽  
Ze Chang ◽  
Xian-He Bu
Keyword(s):  
Metal Ions ◽  
Human Health ◽  
Metal Organic Framework ◽  
High Sensitivity ◽  
Fluorescence Sensing ◽  
Sensing Material ◽  
Highly Sensitive ◽  
Sensitivity And Selectivity ◽  
Metal Organic ◽  
Organic Framework

High sensitivity and selectivity for detection of metal ions are very important to protect human health. Fluorescent metal-organic framework (MOF) as a new sensing material has attracted more and more...

A highly sensitive and selective fluorescent turn-on chemosensor bearing a 7-diethylaminocoumarin moiety for the detection of cyanide in organic and aqueous solutions

2020 ◽  
Vol 44 (44) ◽  
pp. 19155-19165
Author(s):  
Burcu Aydıner ◽  
Ömer Şahin ◽  
Deniz Çakmaz ◽  
Gökhan Kaplan ◽  
Kerem Kaya ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Emission Intensity ◽  
High Sensitivity ◽  
Turn On ◽  
Highly Sensitive ◽  
Sensitivity And Selectivity

Novel 7-diethylaminocoumarin based dyes showed high sensitivity and selectivity to cyanide anions in both organic and aqueous solutions, which was observed by a drastic increment in the emission intensity.

scholarly journals Highly Sensitive, Selective, Flexible and Scalable Room-Temperature NO2 Gas Sensor Based on Hollow SnO2/ZnO Nanofibers

Molecules ◽  
2021 ◽  
Vol 26 (21) ◽  
pp. 6475
Author(s):  
Jiahui Guo ◽  
Weiwei Li ◽  
Xuanliang Zhao ◽  
Haowen Hu ◽  
Min Wang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Gas Sensing ◽  
Positive Impact ◽  
High Sensitivity ◽  
Detection Sensitivity ◽  
Pure Sno2 ◽  
Flexible Devices ◽  
Low Concentrations ◽  
Highly Sensitive ◽  
Sensitivity And Selectivity

Semiconducting metal oxides can detect low concentrations of NO2 and other toxic gases, which have been widely investigated in the field of gas sensors. However, most studies on the gas sensing properties of these materials are carried out at high temperatures. In this work, Hollow SnO2 nanofibers were successfully synthesized by electrospinning and calcination, followed by surface modification using ZnO to improve the sensitivity of the SnO2 nanofibers sensor to NO2 gas. The gas sensing behavior of SnO2/ZnO sensors was then investigated at room temperature (~20 °C). The results showed that SnO2/ZnO nanocomposites exhibited high sensitivity and selectivity to 0.5 ppm of NO2 gas with a response value of 336%, which was much higher than that of pure SnO2 (13%). In addition to the increase in the specific surface area of SnO2/ZnO-3 compared with pure SnO2, it also had a positive impact on the detection sensitivity. This increase was attributed to the heterojunction effect and the selective NO2 physisorption sensing mechanism of SnO2/ZnO nanocomposites. In addition, patterned electrodes of silver paste were printed on different flexible substrates, such as paper, polyethylene terephthalate and polydimethylsiloxane using a facile screen-printing process. Silver electrodes were integrated with SnO2/ZnO into a flexible wearable sensor array, which could detect 0.1 ppm NO2 gas after 10,000 bending cycles. The findings of this study therefore open a general approach for the fabrication of flexible devices for gas detection applications.

Highly sensitive and fast-response hydrogen sensing of WO3 nanoparticles via palladium reined spillover effect

Nanoscale ◽  
2021 ◽  
Author(s):  
Zhengyou Zhu ◽  
Xiaxia Xing ◽  
Dongliang Feng ◽  
Zhenxu Li ◽  
Yingying Tian ◽  
...  
Keyword(s):  
Spillover Effect ◽  
High Sensitivity ◽  
Fast Response ◽  
Hydrogen Sensing ◽  
Highly Sensitive ◽  
Sensitivity And Selectivity

Hydrogen sensing simultaneously endowed with fast response, high sensitivity and selectivity are highly desired in detecting hydrogen leakages such as in those hydrogen-driven vehicles and space rockets. Here, hydrogen sensing...

A highly sensitive and selective “turn-on” fluorescent probe for detection of fleroxacin in human serum and urine based on a lanthanide functionalized metal–organic framework

2019 ◽  
Vol 48 (48) ◽  
pp. 17945-17952 ◽  
Author(s):  
Tian-Yu Liu ◽  
Xiang-Long Qu ◽  
Bing Yan
Keyword(s):  
Human Serum ◽  
Metal Organic Framework ◽  
High Sensitivity ◽  
Luminescent Probe ◽  
Turn On ◽  
Highly Sensitive ◽  
Sensitivity And Selectivity ◽  
Metal Organic ◽  
Serum And Urine

A novel luminescent probe based on a Eu3+ functionalized MOF hybrid (Eu3+@1) with high sensitivity and selectivity has been proved to possess enormous potential for the determination of fleroxacin in human serum and urine.

A novel and highly sensitive electrochemical monitoring platform for 4-nitrophenol on MnO2 nanoparticles modified graphene surface

RSC Advances ◽  
2015 ◽  
Vol 5 (108) ◽  
pp. 88996-89002 ◽  
Author(s):  
Shabi Abbas Zaidi ◽  
Jae Ho Shin
Keyword(s):  
Electrochemical Sensor ◽  
High Sensitivity ◽  
Graphene Surface ◽  
Mno2 Nanoparticles ◽  
Highly Sensitive ◽  
Sensitivity And Selectivity ◽  
Modified Graphene ◽  
Electrochemical Monitoring ◽  
Monitoring Platform

A novel, simple fabrication of a 4-nitrophenol (4-NP) electrochemical sensor using MnO2 nanoparticles modified graphene with high sensitivity and selectivity.

scholarly journals Mono-6-Deoxy-6-Aminopropylamino-β-Cyclodextrin on Ag-Embedded SiO2 Nanoparticle as a Selectively Capturing Ligand to Flavonoids

Nanomaterials ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1349 ◽  
Author(s):  
Eunil Hahm ◽  
Eun Ji Kang ◽  
Xuan-Hung Pham ◽  
Daham Jeong ◽  
Dae Hong Jeong ◽  
...  
Keyword(s):  
Silica Nanoparticles ◽  
Limit Of Detection ◽  
High Sensitivity ◽  
Raman Intensity ◽  
Trace Quantity ◽  
Highly Sensitive ◽  
Sensitivity And Selectivity ◽  
Similar Materials ◽  
The Relationship ◽  
Selective Technique

It has been increasingly important to develop a highly sensitive and selective technique that is easy to handle in detecting levels of beneficial or hazardous analytes in trace quantity. In this study, mono-6-deoxy-6-aminopropylamino-β-cyclodextrin (pr-β-CD)-functionalized silver-assembled silica nanoparticles (SiO2@Ag@pr-β-CD) for flavonoid detection were successfully prepared. The presence of pr-β-CD on the surface of SiO2@Ag enhanced the selectivity in capturing quercetin and myricetin among other similar materials (naringenin and apigenin). In addition, SiO2@Ag@pr-β-CD was able to detect quercetin corresponding to a limit of detection (LOD) as low as 0.55 ppm. The relationship between the Raman intensity of SiO2@Ag@pr-β-CD and the logarithm of the Que concentration obeyed linearity in the range 3.4–33.8 ppm (R2 = 0.997). The results indicate that SiO2@Ag@pr-β-CD is a promising material for immediately analyzing samples that demand high sensitivity and selectivity of detection.

Europium functionalized ratiometric fluorescent transducer silicon nanoparticles based on FRET for the highly sensitive detection of tetracycline

2017 ◽  
Vol 5 (8) ◽  
pp. 2149-2152 ◽  
Author(s):  
Xinran Li ◽  
Hong Ma ◽  
Min Deng ◽  
Anam Iqbal ◽  
Xiaoyu Liu ◽  
...  
Keyword(s):  
Silicon Nanoparticles ◽  
High Sensitivity ◽  
Sensitive Detection ◽  
Ratiometric Fluorescence ◽  
Silicon Nanoparticle ◽  
Highly Sensitive ◽  
Sensitivity And Selectivity ◽  
Highly Sensitive Detection

A europium functionalized silicon nanoparticle (SiNP) ratiometric fluorescence transducer based on FRET was designed to detect tetracycline (TC) with high sensitivity and selectivity.

Few-layered MoSe2 nanosheets as an efficient peroxidase nanozyme for highly sensitive colorimetric detection of H2O2 and xanthine

2018 ◽  
Vol 6 (1) ◽  
pp. 105-111 ◽  
Author(s):  
Xiaoju Wu ◽  
Tongming Chen ◽  
Jianxing Wang ◽  
Guowei Yang
Keyword(s):  
Colorimetric Detection ◽  
High Sensitivity ◽  
Highly Sensitive ◽  
Sensitivity And Selectivity

MoSe2 nanosheets possess intrinsic peroxidase-like activity and are applied to H2O2 and xanthine detection with high sensitivity and selectivity.

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