Label-free fluorescent catalytic biosensor for highly sensitive and selective detection of the ferrous ion in water samples using a layered molybdenum disulfide nanozyme coupled with an advanced chemometric model

The Analyst ◽  
2016 ◽  
Vol 141 (5) ◽  
pp. 1822-1829 ◽  
Author(s):  
Jie Hu ◽  
Qianfen Zhuang ◽  
Yong Wang ◽  
Yongnian Ni
Keyword(s):  
Molybdenum Disulfide ◽  
Water Samples ◽  
Catalytic Effect ◽  
Ferrous Ion ◽  
Selective Detection ◽  
Label Free ◽  
Highly Sensitive

The synergistically enhanced catalytic effect of a Fe2+/molybdenum disulfide (MoS2) nanosheet was exploited to construct a nanozyme biosensor for Fe2+.

Target-responsive dumbbell probe-mediated rolling circle amplification strategy for highly sensitive Hg2+ detection

RSC Advances ◽  
2014 ◽  
Vol 4 (51) ◽  
pp. 27091-27097 ◽  
Author(s):  
Qingwang Xue ◽  
Yanqin Lv ◽  
Yuanfu Zhang ◽  
Shuling Xu ◽  
Qiaoli Yue ◽  
...  
Keyword(s):  
Rolling Circle Amplification ◽  
Selective Detection ◽  
Label Free ◽  
Rolling Circle ◽  
Fluorescent Sensing ◽  
Highly Sensitive ◽  
Mercuric Ions ◽  
Amplification Strategy

A novel label-free amplified fluorescent sensing scheme based on target-responsive dumbbell probe-mediated rolling circle amplification (D-RCA) has been developed for sensitive and selective detection of mercuric ions.

Label-free biosensor based on dsDNA-templated copper nanoparticles for highly sensitive and selective detection of NAD+

RSC Advances ◽  
2016 ◽  
Vol 6 (94) ◽  
pp. 91077-91082 ◽  
Author(s):  
Jia Ge ◽  
Zhen-Zhen Dong ◽  
Lin Zhang ◽  
Qi-Yong Cai ◽  
Dong-Mei Bai ◽  
...  
Keyword(s):  
Copper Nanoparticles ◽  
Selective Detection ◽  
Label Free ◽  
Ligation Reaction ◽  
Dna Ligation ◽  
Highly Sensitive

A novel label-free biosensor for high sensing of NAD+ based on dsDNA-templated CuNPs and DNA ligation reaction.

AIE-active luminogen for highly sensitive and selective detection of picric acid in water samples: Pyridyl as an effective recognition group

2019 ◽  
Vol 163 ◽  
pp. 1-8 ◽  
Author(s):  
Yuqing Ma ◽  
Yuyang Zhang ◽  
Xiaojun Liu ◽  
Qiong Zhang ◽  
Lin Kong ◽  
...  
Keyword(s):  
Water Samples ◽  
Picric Acid ◽  
Selective Detection ◽  
Highly Sensitive

Label-Free Electrical Immunosensor for Highly Sensitive and Specific Detection of Microcystin-LR in Water Samples

2015 ◽  
Vol 49 (15) ◽  
pp. 9256-9263 ◽  
Author(s):  
Feng Tan ◽  
Nuvia Maria Saucedo ◽  
Pankaj Ramnani ◽  
Ashok Mulchandani
Keyword(s):  
Water Samples ◽  
Label Free ◽  
Specific Detection ◽  
Highly Sensitive

Synthesis of fluorescent ionic liquid-functionalized silicon nanoparticles with tunable amphiphilicity and selective determination of Hg2+

2018 ◽  
Vol 6 (48) ◽  
pp. 8214-8220 ◽  
Author(s):  
Quan Li ◽  
Kaite Peng ◽  
Yanzhen Lu ◽  
Aoxin Li ◽  
Fenfang Che ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Silicon Nanoparticles ◽  
Selective Detection ◽  
Label Free ◽  
Selective Determination ◽  
Highly Sensitive

Label-free fluorescent ionic liquid-functionalized silicon nanoparticles with tunable amphiphilicity for highly sensitive and selective detection of Hg2+ were synthesized.

Highly Sensitive and Selective Detection of Phenolic Compound in River and Drinking Water Samples Using One–Pot Synthesized 3D–Cobalt Oxide Polyhedrons

2017 ◽  
Vol 164 (9) ◽  
pp. B463-B469 ◽  
Author(s):  
Mani Govindasamy ◽  
Sakthivel Kogularasu ◽  
Shen-Ming Chen ◽  
Yi-Hui Cheng ◽  
Muthumariappan Akilarasan ◽  
...  
Keyword(s):  
Drinking Water ◽  
Cobalt Oxide ◽  
Phenolic Compound ◽  
Water Samples ◽  
Selective Detection ◽  
One Pot ◽  
Highly Sensitive ◽  
Drinking Water Samples

An oligonucleotide-based label-free fluorescent sensor: highly sensitive and selective detection of Hg2+ in aqueous samples

2012 ◽  
Vol 4 (5) ◽  
pp. 1310 ◽  
Author(s):  
Yamin Luo ◽  
Peng Wu ◽  
Jing Hu ◽  
Shaopan He ◽  
Xiandeng Hou ◽  
...  
Keyword(s):  
Fluorescent Sensor ◽  
Selective Detection ◽  
Label Free ◽  
Aqueous Samples ◽  
Highly Sensitive

Label-Free Aptamer Fluorescence Determination of Trace Pb2+ Using AuPd Nanoalloy Probe as Catalyst

2013 ◽  
Vol 631-632 ◽  
pp. 18-21 ◽  
Author(s):  
Zhi Liang Jiang ◽  
Mei Ling Tang ◽  
Qing Ye Liu ◽  
Ai Hui Liang
Keyword(s):  
Detection Limit ◽  
Fluorescence Quenching ◽  
Fluorescence Intensity ◽  
Water Samples ◽  
Catalytic Effect ◽  
Rhodamine 6G ◽  
Label Free ◽  
Double Stranded Dna ◽  
Fluorescence Determination

In the condition of 1.24 mmol/L EDTANa2, 16.7 mmol/L NaCl and 0.17 mmol/L Tris, the substrate chain of double-stranded DNA (dsDNA) could be cracked by Pb2+ to release single-stranded DNA (ssDNA) that adsorb onto AuPd nanoparticle (AuPdNP) and form stable AuPdNP-ssDNA, but the dsDNA can not protect AuPdNP that were aggregated to big AuPdNP aggregations (AuPdNPA) under the action of NaCl. The AuPdNP-ssDNA and AuPdNPA could be separated by centrifugation. With the concentration of Pb2+ increased, the released ssDNA increased, the AuPdNP-ssDNA in centrifugation solution increased and the catalytic effect enhanced on the fluorescence quenching reaction of Rhodamine 6G (Rh6G) and NaH2PO2, which led the fluorescence intensity at 552nm to decrease. The decreased fluorescence intensity (ΔF552nm) was linear to the concentration of Pb2+ in the range of 0.33-8.00 nmol/L, a detection limit of 0.21 nmol/L. The proposed method was applied to detect Pb2+ in water samples, with satisfactory results.

scholarly journals Enhanced Plasmonic Biosensor Utilizing Paired Antibody and Label-Free Fe3O4 Nanoparticles for Highly Sensitive and Selective Detection of Parkinson’s α-Synuclein in Serum

Biosensors ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 402
Author(s):  
Samuel Husin Surya Mandala ◽  
Tai-Jan Liu ◽  
Chiung-Mei Chen ◽  
Kuo-Kang Liu ◽  
Mochamad Januar ◽  
...  
Keyword(s):  
Early Diagnosis ◽  
Neurodegenerative Disorder ◽  
Decay Length ◽  
Selective Detection ◽  
Label Free ◽  
Serum Samples ◽  
Spr Sensor ◽  
Fe3o4 Nps ◽  
Potential Biomarker ◽  
Highly Sensitive

Parkinson’s disease (PD) is an acute and progressive neurodegenerative disorder, and diagnosis of the disease at its earliest stage is of paramount importance to improve the life expectancy of patients. α-Synuclein (α-syn) is a potential biomarker for the early diagnosis of PD, and there is a great need to develop a biosensing platform that precisely detects α-syn in human body fluids. Herein, we developed a surface plasmon resonance (SPR) biosensor based on the label-free iron oxide nanoparticles (Fe3O4 NPs) and paired antibody for the highly sensitive and selective detection of α-syn in serum samples. The sensitivity of the SPR platform is enhanced significantly by directly depositing Fe3O4 NPs on the Au surface at a high density to increase the decay length of the evanescent field on the Au film. Moreover, the utilization of rabbit-type monoclonal antibody (α-syn-RmAb) immobilized on Au films allows the SPR platform to have a high affinity-selectivity binding performance compared to mouse-type monoclonal antibodies as a common bioreceptor for capturing α-syn molecules. As a result, the current platform has a detection limit of 5.6 fg/mL, which is 20,000-fold lower than that of commercial ELISA. The improved sensor chip can also be easily regenerated to repeat the α-syn measurement with the same sensitivity. Furthermore, the SPR sensor was applied to the direct analysis of α-syn in serum samples. By using a format of paired α-syn-RmAb, the SPR sensor provides a recovery rate in the range from 94.5% to 104.3% to detect the α-syn in diluted serum samples precisely. This work demonstrates a highly sensitive and selective quantification approach to detect α-syn in human biofluids and paves the way for the future development in the early diagnosis of PD.

An aptamer based voltammetric biosensor for endotoxins using a functionalized graphene and molybdenum disulfide composite as a new nanocarrier

The Analyst ◽  
2019 ◽  
Vol 144 (4) ◽  
pp. 1253-1259 ◽  
Author(s):  
Yonghua Yuan ◽  
Linlin Li ◽  
Min Zhao ◽  
Jing Zhou ◽  
Zhihui Chen ◽  
...  
Keyword(s):  
Molybdenum Disulfide ◽  
Functionalized Graphene ◽  
Label Free ◽  
Highly Sensitive

This work describes a label-free aptasensor for highly sensitive endotoxin detection using a functionalized graphene and molybdenum disulfide composite for amplification.

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