Zinc oxide–black phosphorus composites for ultrasensitive nitrogen dioxide sensing

2018 ◽  
Vol 3 (5) ◽  
pp. 525-531 ◽  
Author(s):  
Qun Li ◽  
Yuan Cen ◽  
Jinyu Huang ◽  
Xuejin Li ◽  
Hao Zhang ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Charge Transfer ◽  
Detection Limit ◽  
Nitrogen Dioxide ◽  
Surface Area ◽  
Carrier Mobility ◽  
High Sensitivity ◽  
Fast Response ◽  
Environmental Stability ◽  
Response Behavior

ZnO–BP composites exhibit high sensitivity, fast response behavior, outstanding selectivity, and ultralow detection limit towards nitrogen dioxide due the large surface area, excellent carrier mobility, and enhanced charge transfer of ZnO–BP in the presence of BP. Moreover, the introduction of ZnO significantly enhances BP environmental stability.

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;

A comparative study of electrocatalytic oxidation of glucose on conductive Ni-MOF nanosheet arrays with different ligands

2020 ◽  
Vol 44 (41) ◽  
pp. 17849-17853
Author(s):  
Yanxia Qiao ◽  
Rui Zhang ◽  
Fangyuan He ◽  
Wenli Hu ◽  
Xiaowei Cao ◽  
...  
Keyword(s):  
Detection Limit ◽  
Comparative Study ◽  
Response Time ◽  
Electrocatalytic Oxidation ◽  
Glucose Sensor ◽  
High Sensitivity ◽  
Fast Response ◽  
Serum Samples ◽  
Nanosheet Arrays ◽  
Oxidation Of Glucose

A glucose sensor based on conductive Ni-MOF nanosheet arrays/CC exhibits a fast response time, a low detection limit, a high sensitivity, and it can also be applied for the detection of glucose in human serum samples.

scholarly journals High-performance non-enzymatic glucose detection: using a conductive Ni-MOF as an electrocatalyst

2020 ◽  
Vol 8 (25) ◽  
pp. 5411-5415 ◽  
Author(s):  
Yanxia Qiao ◽  
Qian Liu ◽  
Siyu Lu ◽  
Guang Chen ◽  
Shuyan Gao ◽  
...  
Keyword(s):  
Detection Limit ◽  
Response Time ◽  
Blood Serum ◽  
High Performance ◽  
Glucose Sensor ◽  
High Sensitivity ◽  
Fast Response ◽  
Glucose Detection ◽  
Serum Samples ◽  
Fast Response Time

A glucose sensor based on a conductive Ni-MOF as an electrocatalyst exhibits a fast response time, low detection limit, and high sensitivity, and it can also be applied for the detection of glucose in blood serum samples.

scholarly journals Drop-casted Graphene Oxide Love wave sensor for detection of humidity and VOCs

2016 ◽  
Vol 11 (1) ◽  
pp. 49-56
Author(s):  
I. Nikolaou ◽  
H. Hallil ◽  
B. Plano ◽  
G. Deligeorgis ◽  
V. Conedera ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Detection Limit ◽  
Love Wave ◽  
Public Awareness ◽  
Analytical Techniques ◽  
High Sensitivity ◽  
Fast Response ◽  
Detection Methods ◽  
Wide Range ◽  
Highly Sensitive Detection

The rising demand for sensitive analytical techniques have led to a great deal of research interest in the recent years, which has also generated much public awareness of health risks caused by environmental humidity and air pollution. This study reports advancements in highly-sensitive detection methods using Love wave devices fabricated from Graphene Oxide (GO). Under this, solutions of GO were prepared and used to achieve improved efficiency of the oxidation process and enhance the sensitivity of Relative Humidity (RH) and Volatile Organic Compounds (VOCs) detections. This work demonstrates that the detection limit of RH could be set very low due to the certain sensitivity levels. Similarly, GO prepared by us exhibited low detection limit for VOCs, proving the multi-functionality of GO rather than alternative sensing materials. The experiments conducted at room temperature and realized fast response and recovery times. This Love wave sensor provides high accuracy under full scale exposure of target analytes. Eventually, these ultrasensitive GO based devices can pave the way for a wide range of high-sensitivity detection applications.

scholarly journals Fabrication of Lettuce-Like ZnO Gas Sensor with Enhanced H2S Gas Sensitivity

Crystals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 145 ◽  
Author(s):  
Ziyang Yu ◽  
Jie Gao ◽  
Longxiao Xu ◽  
Tianyu Liu ◽  
Yueying Liu ◽  
...  
Keyword(s):  
Detection Limit ◽  
Gas Sensor ◽  
Recovery Time ◽  
High Sensitivity ◽  
Fast Response ◽  
Chemical Compositions ◽  
Gas Sensitivity ◽  
Response Characteristics ◽  
One Step ◽  
H2s Detection

In this work, a lettuce-like ZnO gas sensor with high sensitivity for H2S detection was successfully fabricated by a one-step hydrothermal method. Characterization analysis of the phases, crystallinities, morphology, and chemical compositions indicated that lettuce-like ZnO has a lettuce-like microsphere structure composed of wurtzite hexagonal ZnO sheets. A gas sensitivity test of the lettuce-like ZnO showed that the sensor had a high H2S response (113.04 for 100 ppm H2S) and H2S selectivity. The lettuce-like ZnO sensor has fast response characteristics while maintaining high sensitivity, and has a response time as low as 15 seconds and a recovery time of 90 seconds, and the detection limit reaches 1 ppm. The sensitive mechanism of lettuce-like ZnO sensor to H2S is also discussed.

A twisted intramolecular charge transfer probe for rapid and specific detection of trace biological SO2 derivatives and bio-imaging applications

2015 ◽  
Vol 51 (6) ◽  
pp. 1154-1156 ◽  
Author(s):  
Leiming Zhu ◽  
Junchao Xu ◽  
Zhe Sun ◽  
Boqiao Fu ◽  
Caiqin Qin ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Detection Limit ◽  
Intramolecular Charge Transfer ◽  
Fast Response ◽  
Ratiometric Fluorescence ◽  
Specific Detection ◽  
Twisted Intramolecular Charge Transfer ◽  
Fluorescence Response ◽  
Low Detection Limit ◽  
Bio Imaging

A highly “reactive” probe showed a ratiometric fluorescence response to HSO3− with fast response and low detection limit (3.0 nM).

Zinc oxide obtained by the solvothermal method with high sensitivity and selectivity to nitrogen dioxide

2020 ◽  
Vol 46 (6) ◽  
pp. 7756-7766 ◽  
Author(s):  
I.A. Nagornov ◽  
A.S. Mokrushin ◽  
E.P. Simonenko ◽  
N.P. Simonenko ◽  
Ph.Yu. Gorobtsov ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Nitrogen Dioxide ◽  
Solvothermal Method ◽  
High Sensitivity ◽  
Sensitivity And Selectivity

A high-sensitivity fluorescent probe with a self-immolative spacer for real-time ratiometric detection and imaging of alkaline phosphatase activity

2019 ◽  
Vol 43 (30) ◽  
pp. 11887-11892 ◽  
Author(s):  
Xueyan Zhang ◽  
Xiangzhu Chen ◽  
Yuanyuan Zhang ◽  
Gui Gao ◽  
Xiaoqian Huang ◽  
...  
Keyword(s):  
Alkaline Phosphatase ◽  
Detection Limit ◽  
Quantum Yield ◽  
Alkaline Phosphatase Activity ◽  
High Sensitivity ◽  
Fast Response ◽  
High Quantum Yield ◽  
Ratiometric Detection ◽  
Excellent Selectivity ◽  
Ratio Response

The probe APW uses a self-immolative mechanism to achieve a ratio response to ALP, which has the following advantages: fast response (in less than 15 min), high quantum yield (Φ = 0.6), low detection limit (0.46 U L−1) and excellent selectivity.

Nanomaterial LaNiTiO3-Fe3O4-based peroxidase biomimetic sensor with high sensitivity

2020 ◽  
Vol 16 ◽  
Author(s):  
Yanhong Xu ◽  
Ying Sun ◽  
Qiao Feng
Keyword(s):  
Detection Limit ◽  
Low Cost ◽  
Supporting Electrolyte ◽  
High Sensitivity ◽  
Fast Response ◽  
H2o2 Concentration ◽  
Current Time ◽  
Real Samples ◽  
Wide Range ◽  
Biomimetic Sensor

Background: Hydrogen peroxide (H2O2) is widely present in various fields. And H2O2 plays quintessential role in variety of biomolecular processes. H2O2 concentration level is an essential biological parameter in monitoring and maintaining the physiological balance of a living cell, and its variation will cause some related diseases. Therefore, it is extremely significant to fabricate biosensor with low cost which can quickly, accurately and sensitively detect H2O2 in a wide range. The aims of this paper are to explore a novel electrochemical sensor with high intrinsic peroxidase-like activity, high sensitivity and stability to detect effectively H2O2 concentration in real samples. Methods: The chemical modified electrode LaNiTiO3-Fe3O4/GCE is fabricated based on nanomaterial LaNiTiO3-Fe3O4 by simply process, and its electrochemical properties are investigated in the supporting electrolyte of 0.1 M NaOH by the techniques of cyclic voltammetry and current-time curves on an electrochemical workstation with a conventional threeelectrode system. Results: LaNiTiO3-Fe3O4 nanoparticles show good peroxidase-like activity for H2O2 at a low applied potential of +0.50 V. Under the optimum conditions, the peroxidase biomimetic sensor LaNiTiO3-Fe3O4/GCE exhibits a wide linear response for H2O2 oxidation in the range of 0.05 μM - 3.0 mM (R = 0.9994) with a high sensitivity of 3946.2 μA∙mM1 ∙cm-2 and fast response time of 2 s, and the detection limit of H2O2 is found to be ca. 5.15 nM (S/N = 3). Moreover, the biosensor presents a good repeatability, stability and anti-interference. Satisfactory results were obtained when the sensor LaNiTiO3-Fe3O4/GCE is applied to determine H2O2 in real samples. All of these results provide support to practical application. Conclusion: A highly sensitive peroxidase biomimetic sensor based on LaNiTiO3-Fe3O4 with nano-scaled material is successfully explored, and shows good activity for H2O2. The proposed biosensor with simple and low cost has exhibited excellent advantages of quick response, wide linear range, low detection limit, high sensitivity, long-term stability and good anti-interference ability, which provides promising applications.

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