Methods for use of a sensitive layer for hydrogen sulphide detection with SAW/BAW devices
US7867552B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 2008 |
| Grant date | Jan 11, 2011 |
| Priority date | — |
| Expiry date | May 2, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/0426
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods can be adapted for design of a sensitive monolayer for detection of hydrogen sulphide at room temperature with SAW/BAW devices. The sensitive monolayer can be synthesized based on chemical compounds, which belongs to a class of thiacalix[n]arenas, mercapto halides, mercapto alcohols and chloromethylated thiacalix[n]arenas. The sensitive monolayer can be directly immobilized or anchored at the surface of a piezoelectric quartz substrate in a covalently bonded manner by means of direct printing process. The piezoelectric quartz substrate can be activated in basic medium or in acid medium before the immobilization of the sensitive monolayer in order to increase the population of OH groups. Thus, the synthesized sensitive monolayer exhibits a high site density, fast response and long-term stability for H2S sensing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.