scholarly journals Constructing a TiO2/PDA core/shell nanorod array electrode as a highly sensitive and stable photoelectrochemical glucose biosensor

RSC Advances ◽  
2020 ◽  
Vol 10 (17) ◽  
pp. 10017-10022 ◽  
Author(s):  
Wei Xu ◽  
Wenke Yang ◽  
Hongkai Guo ◽  
Lianyuan Ge ◽  
Jinchun Tu ◽  
...  
Keyword(s):  
Detection Limit ◽  
High Sensitivity ◽  
Nanorod Array ◽  
Glucose Biosensor ◽  
Core Shell ◽  
Glucose Biosensors ◽  
Low Detection Limit ◽  
Array Electrode ◽  
Highly Sensitive

Developing stable PEC glucose biosensors with high sensitivity and low detection limit is highly desirable in the biosensor field.

scholarly journals Highly Sensitive Salinity and Temperature Sensor Using Tamm Resonance

2021 ◽  
Author(s):  
Zaky A. Zaky ◽  
Arafa H. Aly
Keyword(s):  
Detection Limit ◽  
Quality Factor ◽  
Temperature Sensor ◽  
Electromagnetic Waves ◽  
Incident Angle ◽  
High Sensitivity ◽  
Low Detection Limit ◽  
Highly Sensitive ◽  
Strong Candidate ◽  
Very High

Abstract In this paper, a Tamm plasmons resonance-based sensor is theoretically studied to calculate the salinity of seawater as well as a temperature sensor based on photonic crystals. The transfer matrix method (TMM) is used to systematically study and analyze the reflected s-polarized electromagnetic waves from the sensing structure. The proposed structure composes of prism/Au/water/(Si/SiO2)N/Si. The sensitivity, figure-of-merit, quality factor, and detection limit of the sensors are improved by optimizing the thickness of the seawater layer, incident angle, salinity concentration, and temperature. The proposed salinity sensor records a very high sensitivity of 8.5x104 nm/RIU and quality factor of 3x103, and a very low detection limit of 10-7 nm. Besides, the suggested temperature sensor achieves high sensitivity (from 2.8 nm/˚C to 10.8 nm/˚C), high-quality factor of 3.5x103, and a very low detection limit of 3x10-7 nm. These results indicate that the proposed sensor is a strong candidate for salinity and temperature measurements.

Nanoporous Cu2O nanotube/nanorod array electrodes for non-enzymatic glucose sensing with high sensitivity and very low detection limit

2020 ◽  
Vol 329 ◽  
pp. 135177 ◽  
Author(s):  
Lakmini Jayasingha ◽  
Charith Jayathilaka ◽  
Roshantha Kumara ◽  
Koji Ohara ◽  
Migelhewa Kaumal ◽  
...  
Keyword(s):  
Detection Limit ◽  
High Sensitivity ◽  
Nanorod Array ◽  
Glucose Sensing ◽  
Low Detection Limit

An ultra-highly sensitive and selective self-enhanced AIECL sensor for public security early warning in a nuclear emergency via a co-reactive group poisoning mechanism

2021 ◽  
Author(s):  
Ziyu Wang ◽  
Meiyun Xu ◽  
Nan Zhang ◽  
Jian-Bin Pan ◽  
Xinqi Wu ◽  
...  
Keyword(s):  
Detection Limit ◽  
Early Warning ◽  
High Selectivity ◽  
Public Security ◽  
Reactive Group ◽  
Low Detection Limit ◽  
Highly Sensitive ◽  
Vapor Sensors ◽  
Nuclear Emergency

A mechanism of co-reactive group poisoning (CGP) was discovered for designing efficient I2 vapor sensors for early warning of a nuclear emergency, which give an ultra-low detection limit of 0.13 ppt as well as high selectivity.

Design of Photoionization Detector Based on the Miniature Gas Chromatography

2013 ◽  
Vol 823 ◽  
pp. 291-295 ◽  
Author(s):  
Shou Chen Chai ◽  
Peng Yang ◽  
Cheng Jia Yang ◽  
Chun Li Cai ◽  
Na Yu
Keyword(s):  
Gas Chromatography ◽  
Detection Limit ◽  
Ionization Chamber ◽  
High Sensitivity ◽  
Fast Response ◽  
Low Detection Limit ◽  
Photoionization Detector ◽  
Key Factor ◽  
The Stability ◽  
Sensitivity Detection

In the space restricted airtight environment that people lives in, detecting harmful gas by miniature gas chromatography is the practical requirement at present, however, PIDs performance is key factor that restrict the application of miniature gas chromatography, the redesign of the detectors gas route in this paper aiming at improve detectors stability observably, and schemed out miniature PID with high sensitivity, low detection limit and fast response. The result of the experiment shows that the detection limit is 0.04ppm, the sensitivity is 101mv/ppm,the stability is 0.04×10-6/24h,meeting the project requirement. Keywords: photoionization detector; ionization chamber; sensitivity; detection limit;

scholarly journals Construction of Two Stable Co(II)-Based Hydrogen-Bonded Organic Frameworks as a Luminescent Probe for Recognition of Fe3+ and Cr2O72− in H2O

Molecules ◽  
2021 ◽  
Vol 26 (19) ◽  
pp. 5955
Author(s):  
Qi-Ying Weng ◽  
Ya-Li Zhao ◽  
Jia-Ming Li ◽  
Miao Ouyang
Keyword(s):  
Detection Limit ◽  
Aqueous Media ◽  
Three Dimensional ◽  
Cobalt Atom ◽  
High Sensitivity ◽  
X Ray Diffraction ◽  
Chlorobenzoic Acid ◽  
X Ray ◽  
Highly Sensitive ◽  
Hydrogen Bonded

A pair of cobalt(II)-based hydrogen-bonded organic frameworks (HOFs), [Co(pca)2(bmimb)]n (1) and [Co2(pca)4(bimb)2] (2), where Hpca = p-chlorobenzoic acid, bmimb = 1,3-bis((2-methylimidazol-1-yl)methyl)benzene, and bimb = 1,4-bis(imidazol-1-ylmethyl)benzene were hydrothermally synthesized and characterized through infrared spectroscopy (IR), elemental and thermal analysis (EA), power X-ray diffraction (PXRD), and single-crystal X-ray diffraction (SCXRD) analyses. X-ray diffraction structural analysis revealed that 1 has a one-dimensional (1D) infinite chain network through the deprotonated pca− monodentate chelation and with a μ2-bmimb bridge Co(II) atom, and 2 is a binuclear Co(II) complex construction with a pair of symmetry-related pca− and bimb ligands. For both 1 and 2, each cobalt atom has four coordinated twisted tetrahedral configurations with a N2O2 donor set. Then, 1 and 2 are further extended into three-dimensional (3D) or two-dimensional (2D) hydrogen-bonded organic frameworks through C–H···Cl interactions. Topologically, HOFs 1 and 2 can be simplified as a 4-connected qtz topology with a Schläfli symbol {64·82} and a 4-connected sql topology with a Schläfli symbol {44·62}, respectively. The fluorescent sensing application of 1 was investigated; 1 exhibits high sensitivity recognition for Fe3+ (Ksv: 10970 M−1 and detection limit: 19 μM) and Cr2O72− (Ksv: 12960 M−1 and detection limit: 20 μM). This work provides a feasible detection platform of HOFs for highly sensitive discrimination of Fe3+ and Cr2O72− in aqueous media.

W18O49/Ti3C2Tx Mxene nanocomposites for highly sensitive acetone gas sensor with low detection limit

2020 ◽  
Vol 304 ◽  
pp. 127274 ◽  
Author(s):  
Shibin Sun ◽  
Mingwei Wang ◽  
Xueting Chang ◽  
Yingchang Jiang ◽  
Dongzhi Zhang ◽  
...  
Keyword(s):  
Detection Limit ◽  
Gas Sensor ◽  
Low Detection Limit ◽  
Highly Sensitive

scholarly journals Marine Toxins Detection by Biosensors Based on Aptamers

Toxins ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 1 ◽  
Author(s):  
Wei Ye ◽  
Taomei Liu ◽  
Weimin Zhang ◽  
Muzi Zhu ◽  
Zhaoming Liu ◽  
...  
Keyword(s):  
Detection Limit ◽  
Sensitivity And Specificity ◽  
High Efficiency ◽  
Rapid Development ◽  
High Sensitivity ◽  
Detection Methods ◽  
Marine Toxins ◽  
Time Saving ◽  
Low Detection Limit ◽  
The Future

Marine toxins cause great harm to human health through seafood, therefore, it is urgent to exploit new marine toxins detection methods with the merits of high sensitivity and specificity, low detection limit, convenience, and high efficiency. Aptasensors have emerged to replace classical detection methods for marine toxins detection. The rapid development of molecular biological approaches, sequencing technology, material science, electronics and chemical science boost the preparation and application of aptasensors. Taken together, the aptamer-based biosensors would be the best candidate for detection of the marine toxins with the merits of high sensitivity and specificity, convenience, time-saving, relatively low cost, extremely low detection limit, and high throughput, which have reduced the detection limit of marine toxins from nM to fM. This article reviews the detection of marine toxins by aptamer-based biosensors, as well as the selection approach for the systematic evolution of ligands by exponential enrichment (SELEX), the aptamer sequences. Moreover, the newest aptasensors and the future prospective are also discussed, which would provide thereotical basis for the future development of marine toxins detection by aptasensors.

scholarly journals A highly selective and sensitive fluorescent probe for lactate dehydrogenase based on ultrabright adenosine monophosphate capped gold nanoclusters

RSC Advances ◽  
2017 ◽  
Vol 7 (22) ◽  
pp. 13438-13443 ◽  
Author(s):  
Jiao Liu ◽  
Hong-Wei Li ◽  
Yuqing Wu
Keyword(s):  
Lactate Dehydrogenase ◽  
Detection Limit ◽  
Fluorescent Probe ◽  
Fluorescence Probe ◽  
Gold Nanoclusters ◽  
High Sensitivity ◽  
Adenosine Monophosphate ◽  
Low Detection Limit ◽  
Sensitivity And Selectivity

The ultrabright AuNCs@AMP are used as fluorescence probe to detect lactate dehydrogenase (LDH) with high sensitivity and selectivity, showing an extremely low detection limit of 0.2 nM (26 pg μL−1, 0.8 U L−1).

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