A5006445393- Advanced Chemical Sensor Technologies
- Gas Sensing Nanomaterials and Sensors
- Acoustic Wave Resonator Technologies
- Analytical Chemistry and Sensors
- Photonic and Optical Devices
- Advanced Fiber Optic Sensors
- Mechanical and Optical Resonators
- Spectroscopy and Laser Applications
Universidad Nacional Autónoma de México
2018-2020
National Training Service
2019
In the present work, a novel, portable and innovative eNose composed of surface acoustic wave (SAW) sensor array based on zeolitic imidazolate frameworks, ZIF-8 ZIF-67 nanocrystals (pure combined with gold nanoparticles), as sensitive layers has been tested non-invasive system to detect different disease markers, such acetone, ethanol ammonia, related diagnosis control diabetes mellitus through exhaled breath. The sensors have prepared by spin coating, achieving continuous at SAW device. Low...
This work presents the fabrication and gas sensing properties of Love wave sensors based on non-modified gold nanoparticle-modified polypyrrole. Results demonstrate integration uniform polypyrrole layers with smooth granular surface incorporation dispersed crystalline nanoparticles within modified layers. Gas tests in dry conditions show enhanced performance to ethylene ammonia for systems as compared those without modification reported literature. The effect humidity proves significant both...
A portable electronic nose based on surface acoustic wave (SAW) sensors is proposed in this work to detect toxic chemicals, which have a great potential threaten the surrounding natural environment or adversely affect health of people. We want emphasize that ferrite nanoparticles, decorated (Au, Pt, Pd) and undecorated, been used as sensitive coatings for first time these types sensors. Furthermore, incorporates signal conditioning acquisition transmission modules. The was tested low...
Love wave sensors with silver-modified polypyrrole nanoparticles are developed in this work. These systems prove functional at room temperature enhanced response, sensitivity and response time, as compared to other state-of-the-art surface acoustic (SAW) sensors, towards volatile organic compounds (VOCs). Results demonstrate the monitoring of hundreds ppb such acetone, ethanol toluene low estimated limits detection (~3 for acetone). results attributed use a second guiding/sensitive layer...
In the present work a novel, portable and innovative eNose composed of surface acoustic wave (SAW) sensor array based ZIF-8, ZIF-67 nanocrystals (pure combined with gold nanoparticles) as sensitive layers has been tested non-invasive system to detect differentiate disease markers, such acetone, ethanol ammonia, related early diagnosis diabetes mellitus through exhaled breath. The sensors have prepared by spin coating, achieving continuous homogenous layers. Low concentrations (5 ppm, 10 ppm...
An innovative, simple and inexpensive Love-wave gas sensor based on Fe2O3@WO3−x nanoneedles to detect the variation of ammonia at room temperature was developed. The were successfully formed device via aerosol-assisted chemical vapor deposition (AACVD). worked as guiding sensitive layers detecting changes elastic properties presented by interaction. tested concentrations between 25 90 ppm showed large frequency shifts, high sensibility, short response time good reproducibility.
Love-wave (LW) sensors based on gas sensitive polypyrrole (PPy) nanoparticles (NPs) and their modification with different gold (Au) loads are developed in this work. The research is focused the fabrication process of sensor devices sensing properties to ammonia (NH3).