| Title: | STW resonator with organo-functionalized metallic nanoparticle film for vapor sensing |
| Author(s): | Strashilov VL; Alexieva GE; Velichkov VN; Avramov ID; Evans SD; |
| Address: | "Sofia University, Faculty of Physics, Department of Solid State Physics and Microelectronics, 1164 Sofia, Bulgaria" |
| Journal Title: | IEEE Trans Ultrason Ferroelectr Freq Control |
| ISSN/ISBN: | 1525-8955 (Electronic) 0885-3010 (Linking) |
| Abstract: | "A 1 GHz surface transverse wave resonator on 36 degrees Y-cut quartz plate coated with organothiol-functionalized gold nanoparticle film has been studied as a chemical gas sensor. Considerable sensitivity of the resonant frequency to vapors of ethanol, methanol, chloroform, and acetic acid has been found. Owing to the high short-term stability of the oscillator built, the detection limit is in the low ppm range. The results qualitatively confirm previous results on the same film type obtained by conductivity measurements. In the present case, the conductivity effect resulting from variable separation of nanoparticles is accompanied with surface-attached mass of the absorbed gas. The film matrix exhibits considerable capacity to absorb large amounts of molecules at high gas concentrations" |
| Keywords: | Acetic Acid/analysis Chloroform/analysis Environmental Monitoring/methods Equipment Design Ethanol/analysis Gases/*analysis Gold/*chemistry Metal Nanoparticles/*chemistry Methanol/analysis Nanotechnology/methods Sensitivity and Specificity Surface Propert; |
| Notes: | "MedlineStrashilov, Vesseline L Alexieva, Gergana E Velichkov, Velitchko N Avramov, Ivan D Evans, Stephen D eng Research Support, Non-U.S. Gov't 2009/05/29 IEEE Trans Ultrason Ferroelectr Freq Control. 2009 May; 56(5):1018-23. doi: 10.1109/TUFFC.2009.1133" |
