Highly sensitive and selective sensors to volatile organic compounds using MWCNTs/SnO2

2012 ◽  
Vol 166-167 ◽  
pp. 150-155 ◽  
Author(s):  
Sadegh Ahmadnia-Feyzabad ◽  
Abbas Ali Khodadadi ◽  
Masoud Vesali-Naseh ◽  
Yadollah Mortazavi
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Highly Sensitive ◽  
Volatile Organic

A highly sensitive gas sensor based on Pd-doped Fe3O4nanoparticles for volatile organic compounds detection

2014 ◽  
Vol 6 (3) ◽  
pp. 886-892 ◽  
Author(s):  
Qingfeng Zhai ◽  
Bin Du ◽  
Rui Feng ◽  
Weiying Xu ◽  
Qin Wei
Keyword(s):  
Volatile Organic Compounds ◽  
Gas Sensor ◽  
Organic Compounds ◽  
Highly Sensitive ◽  
Volatile Organic

Ag-Functionalized macro-/mesoporous AZO synthesized by solution combustion for VOCs gas sensing application

RSC Advances ◽  
2016 ◽  
Vol 6 (103) ◽  
pp. 101304-101312 ◽  
Author(s):  
Xinxin Xing ◽  
Yuxiu Li ◽  
Dongyang Deng ◽  
Nan Chen ◽  
Xu Liu ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Gas Sensors ◽  
Gas Sensing ◽  
Solution Combustion ◽  
Highly Sensitive ◽  
Volatile Organic ◽  
Sensing Application

The aim of this paper is to develop easily manufactured and highly sensitive gas sensors for VOCs (volatile organic compounds) detection.

scholarly journals Screening for SARS-CoV-2 persistence in Long COVID patients using sniffer dogs and scents from axillary sweats samples

2022 ◽  
Author(s):  
Dominique GRANDJEAN ◽  
Dorsaf SLAMA ◽  
Capucine GALLET ◽  
Clothilde JULIEN ◽  
Emilie SEYRAT ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Non Invasive ◽  
Invasive Test ◽  
Axillary Sweat ◽  
Highly Sensitive ◽  
Volatile Organic ◽  
Sweat Sample ◽  
Asymptomatic Individuals ◽  
Hospital Contact

Objectives: Dogs can be trained to identify several substances not detected by humans, corresponding to specific volatile organic compounds (VOCs). The presence of VOCs, triggered by SARS-CoV-2 infection, was tested in sweat from Long COVID patients. Patients and methods: An axillary sweat sample of Long COVID patients and of COVID-19 negative, asymptomatic individuals was taken at home to avoid any hospital contact. Swabs were randomly placed in olfaction detection cones, and the material sniffed by at least 2 trained dogs. Results: Forty-five Long COVID patients, mean age 45 (6-71), 73.3% female, with prolonged symptoms evolving for a mean of 15.2 months (5-22) were tested. Dogs discriminated in a positive way 23/45 (51.1%) Long COVID patients versus 0/188 (0%) control individuals (p<.0001). Conclusion:This study suggests the persistence of a viral infection in some Long COVID patients and the possibility of providing a simple, highly sensitive, non-invasive test to detect viral presence, during acute and extended phases of COVID-19.

Materials Design of Sensing Layers for Detection of Volatile Analytes

2012 ◽  
pp. 183-198
Author(s):  
Mutsumi Kimura ◽  
Tadashi Fukawa ◽  
Tsuyoshi Ikehara ◽  
Takashi Mihara
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Chemical Sensors ◽  
Recent Progress ◽  
Materials Design ◽  
Highly Sensitive ◽  
Volatile Organic ◽  
Sensitivity And Selectivity

The authors developed highly sensitive sensing layers for detection of Volatile Organic Compounds (VOCs) by using polymeric nanomaterials. In this chapter, they describe their recent progress on the design of polymeric sensing layers for the chemical sensors. The nanostructures of polymeric sensing layer strongly influenced the sensitivity and selectivity for VOCs sensings.

scholarly journals Highly sensitive and selective fiber-optic Fabry-Perot volatile organic compounds sensor based on a PMMA film

2017 ◽  
Vol 7 (6) ◽  
pp. 2111 ◽  
Author(s):  
Cai-Bin Yu ◽  
Yu Wu ◽  
Chen Li ◽  
Fan Wu ◽  
Jin-Hao Zhou ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Fiber Optic ◽  
Pmma Film ◽  
Highly Sensitive ◽  
Fabry Perot ◽  
Volatile Organic

scholarly journals Cross-Linked Nanoparticle Membranes for Microelectromechanical Chemical Sensors and Pressure Sensors

Proceedings ◽  
2019 ◽  
Vol 2 (13) ◽  
pp. 821
Author(s):  
Hendrik Schlicke ◽  
Hauke Hartmann ◽  
Sophia Caroline Bittinger ◽  
Matthias Rebber ◽  
Malte Behrens ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Chemical Sensors ◽  
Pressure Sensors ◽  
Static Deflection ◽  
Frequency Shifts ◽  
Electrostatically Actuated ◽  
Highly Sensitive ◽  
Volatile Organic

We present novel microelectromechanical chemical sensors for the detection of volatile organic compounds based on electrostatically actuated, nanometer-thin, freestanding membranes of organically cross-linked gold nanoparticles. The sensors employ quasi-static deflection amplitudes or resonance frequency shifts of the membranes as highly sensitive sensing signals and are capable of detecting analytes at concentrations down to the low ppm range. We show that the devices can further be utilized for analyte discrimination. Additionally, we demonstrate that freestanding GNP membranes can be used for the fabrication of highly sensitive resistive pressure sensors.

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