scholarly journals Supramolecular fluorescence sensor for liquefied petroleum gas

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Yi-Yang Zhan ◽  
Jingyuan Liao ◽  
Mizuho Kajita ◽  
Tatsuo Kojima ◽  
Satoshi Takahashi ◽  
...  
Keyword(s):  
High Selectivity ◽  
High Sensitivity ◽  
Fluorescence Sensor ◽  
Selective Detection ◽  
Quick Response ◽  
Liquefied Petroleum Gas ◽  
Aromatic Rings ◽  
Sensing Systems ◽  
Molecular Container ◽  
Gas Molecules

Abstract Sensing systems of nonpolar gas molecules without functional groups such as natural gas and liquefied petroleum gas (LPG) remain difficult to develop because of lacking selective detection of such molecules over other gas molecules. Here we report a supramolecular fluorescence sensor for LPG using a 2-nm-sized cube-shaped molecular container i.e. a nanocube self-assembled from six molecules of gear-shaped amphiphiles (GSA) in water. The nanocube selectively encapsulates LPG, while it does not bind other gas molecules. Upon encapsulation of LPG in the nanocube, the fluorescence from the nanocube is enhanced by 3.9 times, which is caused by the restricted motion of the aromatic rings of GSA in the nanocube based on aggregation-induced emission. Besides the high selectivity, high sensitivity, quick response, high stability of the nanocube for LPG, and easy preparation of GSA satisfy the requirement for its practical use for an LPG sensor.

Real-time and selective detection of nitrates in water using graphene-based field-effect transistor sensors

2018 ◽  
Vol 5 (8) ◽  
pp. 1990-1999 ◽  
Author(s):  
Xiaoyan Chen ◽  
Haihui Pu ◽  
Zipeng Fu ◽  
Xiaoyu Sui ◽  
Jingbo Chang ◽  
...  
Keyword(s):  
Real Time ◽  
Field Effect ◽  
Field Effect Transistor ◽  
High Selectivity ◽  
High Sensitivity ◽  
Selective Detection ◽  
Graphene Field Effect Transistor ◽  
Effect Transistor ◽  
Modified Graphene ◽  
Benzyltriethylammonium Chloride

A benzyltriethylammonium chloride-modified graphene field-effect transistor sensor has high sensitivity, high selectivity and rapid response for nitrate detection.

A label-free and turn-on fluorescence sensor for sensitive and selective detection of iodide using carbon nanodots/silver nanocomposites

2015 ◽  
Vol 7 (10) ◽  
pp. 4038-4043 ◽  
Author(s):  
Buhong Gao ◽  
Ying Tang ◽  
Haijun Sun ◽  
Yan Xuan ◽  
Li Xu ◽  
...  
Keyword(s):  
High Selectivity ◽  
Aqueous Media ◽  
Fluorescence Sensor ◽  
Fluorescence Recovery ◽  
Carbon Nanodots ◽  
Selective Detection ◽  
Label Free ◽  
Turn On ◽  
Silver Nanocomposites

Based on the principle of fluorescence recovery, we propose a simple label-free and turn-on method for the detection of I− ions with high selectivity and sensitivity by using fluorescent Cdots/Ag nanocomposites in aqueous media.

scholarly journals A Novel Fluorescent Probe for Selective Detection of Hydrazine and Its Application in Imaging

Biosensors ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 130
Author(s):  
Ruo-Jun Man ◽  
Meng-Ke Wu ◽  
Bing Yang ◽  
Yu-Shun Yang
Keyword(s):  
Fluorescent Probe ◽  
Water Samples ◽  
High Selectivity ◽  
High Sensitivity ◽  
Living Cells ◽  
Environmental Toxicology ◽  
Future Research ◽  
Selective Detection ◽  
Anti Cancer ◽  
First Time

In this work, a novel fluorescent probe with first-time-selected thiazepine backbone, TZPzine-1, was developed for selective detection of hydrazine in water samples and living cells. Chosen from our recent anti-cancer agents, TZPzine-1 inferred structurally based advantages of the optical adjustability and the hydrazine-trapping approach. It also showed applicable properties including high sensitivity (LOD = 50 nM), wide linear range (0–15 equiv.), high selectivity (especially from competing species), rapid response (within 20 min), and practical steadiness in various pH (6.0–11.0) and temperature (15–50 °C) conditions. To satisfy the interdisciplinary requirements in environmental toxicology, TZPzine-1 was successfully applied in water samples and living cells. We hope that the information in this work, as well as the concept of monitoring the nitrogen cycle, may be referable for future research on systematic management.

A T7 exonuclease-RCA dual amplification system for high-sensitivity and high-selectivity analysis of microRNA

2019 ◽  
Vol 11 (18) ◽  
pp. 2450-2455 ◽  
Author(s):  
Yan Xu ◽  
Yan Li ◽  
Hongkun Zhou ◽  
Xiaoping Mei ◽  
Jieyun Ye ◽  
...  
Keyword(s):  
High Selectivity ◽  
Rolling Circle Amplification ◽  
High Sensitivity ◽  
Selective Detection ◽  
Rolling Circle ◽  
Highly Sensitive ◽  
Amplification System ◽  
Dual Amplification ◽  
T7 Exonuclease

A novel combination of rolling circle amplification and T7 exonuclease-assisted amplification to achieve highly sensitive and selective detection of microRNA molecules was developed.

Phytic acid functionalized magnetic bimetallic metal–organic frameworks for phosphopeptide enrichment

2021 ◽  
Vol 9 (7) ◽  
pp. 1811-1820
Author(s):  
Shuang Yan ◽  
Bin Luo ◽  
Jia He ◽  
Fang Lan ◽  
Yao Wu
Keyword(s):  
Phytic Acid ◽  
Efficient Method ◽  
High Selectivity ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
High Sensitivity ◽  
Phosphopeptide Enrichment ◽  
Metal Organic ◽  
Organic Framework

Novel bimetallic metal–organic framework nanocomposites were fabricated by a facile yet efficient method. The as-prepared nanomaterial exhibited high sensitivity and high selectivity toward phosphopeptides and good reusability of five cycles for enriching phosphopeptides.

Graphene quantum dots supported by graphene oxide as a sensitive fluorescence nanosensor for cytochrome c detection and intracellular imaging

2017 ◽  
Vol 5 (31) ◽  
pp. 6300-6306 ◽  
Author(s):  
Lin Cao ◽  
Xiangqing Li ◽  
Lixia Qin ◽  
Shi-Zhao Kang ◽  
Guodong Li
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Cytochrome C ◽  
Graphene Quantum Dots ◽  
A549 Cells ◽  
High Sensitivity ◽  
Fluorescence Sensor ◽  
Intracellular Imaging ◽  
New Class ◽  
Sensitivity And Selectivity

A new class of Cyt c detection fluorescence sensor based on graphene quantum dots supported by graphene oxide has been facilely developed. The sensor shows a high sensitivity and selectivity for Cyt c detection, and further exhibits favorable intracellular imaging in A549 cells.

Core-shell Cu@C@ZIF-8 composite: a high-performance electrode material for electrochemical sensing of nitrite with high selectivity and sensitivity

2021 ◽  
Author(s):  
Feng Gao ◽  
Xiaolong Tu ◽  
Yongfang Yu ◽  
Yansha Gao ◽  
Jin Zou ◽  
...  
Keyword(s):  
High Performance ◽  
High Selectivity ◽  
Limit Of Detection ◽  
Metal Organic Framework ◽  
High Sensitivity ◽  
Electrochemical Sensing ◽  
Core Shell ◽  
Zeolitic Imidazolate Framework ◽  
Sensing Platform ◽  
The Difference

Abstract Herein, an efficient electrochemical sensing platform is proposed for selective and sensitive detection of nitrite on the basis of Cu@C@Zeolitic imidazolate framework-8 (Cu@C@ZIF-8) heterostructure. Core-shell Cu@C@ZIF-8 composite was synthesized by pyrolysis of Cu-metal-organic framework@ZIF-8 (Cu-MOF@ZIF-8) in Ar atmosphere on account of the difference of thermal stability between Cu-MOF and ZIF-8. For the sensing system of Cu@C@ZIF-8, ZIF-8 with proper pore size allows nitrite diffuse through the shell, while big molecules cannot, which ensures high selectivity of the sensor. On the other hand, Cu@C as electrocatalyst promotes the oxidation of nitrite, thereby resulting high sensitivity of the sensor. Accordingly, the Cu@C@ZIF-8 based sensor presents excellent performance for nitrite detection, which achieves a wide linear response range of 0.1 µM to 300.0 µM, and a low limit of detection (LOD) of 0.033 µM. In addition, the Cu@C@ZIF-8 sensor possesses excellent stability and reproducibility, and was employed to quantify nitrite in sausage samples with recoveries of 95.45-104.80%.

Specific Detection of Staphylococcus Enterotoxin B in Milk Using Piezoresistive Cantilever Aptasensor

2015 ◽  
Vol 645-646 ◽  
pp. 1298-1302
Author(s):  
Rui Zhao ◽  
Yong Zheng Wen ◽  
Wei Ma ◽  
Jian Cheng Yang ◽  
Xiao Mei Yu
Keyword(s):  
High Sensitivity ◽  
Rapid Response ◽  
Experimental Results ◽  
Quick Response ◽  
Specific Detection ◽  
Detection Range ◽  
Coated Surface ◽  
Enterotoxin B ◽  
Food Commodities ◽  
Staphylococcus Enterotoxin B

In this paper, an aptasensor with high sensitivity and rapid response was developed for the detection of staphylococcus enterotoxin B (SEB) by using thiol-modified piezoresistive cantilever. Thiol-modified aptamers, acting as the functionalized sensing elements, were immobilized on the nanogold-coated surface of the sensing cantilever as agents for detecting SEB. By using the functionalized aptasensors, different concentrations of SEB were detected with a wide detection range of 6-100 ng/mL and a quick response in milk. The experimental results indicated that the cantilever-based aptasensors had sufficient sensitivity for the detection of SEB in real food commodities and might provide an economical platform for on-site detections of different toxicants with the advantages of portability, high sensitivity, and rapid response.

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