Abstract
Gas analytical system made with AZO nanoflakes synthesized by programmed co-precipitation method exibits a remarkable chemiresistive response to alcohol homologs and isomers those selective determination is demonstrated even without a prior training.
Highlights
Information transmitted with gaseous species, smells, comprises a valuable source in many practical applications, such as air pollution monitoring,[1,2] methanol detection in beverages,[3] human health assessment,[4] detection of viruses[5] or explosives.[6]
We demonstrate the possibility of analyte detection using a simple e-nose system even without prior training by matching the chemical space built using molecular ngerprints with arti cial space built with e-nose data
Implementing Rietveld analysis to the obtained X-ray diffraction analysis (XRD) pattern, we have re ned the parameters of the crystal lattice (a 1⁄4 b 1⁄4 3.251 A, c 1⁄4 5.207 A, a 1⁄4 b 1⁄4 90, g 1⁄4 120) of synthesized Aldoped ZnO
Summary
Information transmitted with gaseous species, smells, comprises a valuable source in many practical applications, such as air pollution monitoring,[1,2] methanol detection in beverages,[3] human health assessment,[4] detection of viruses[5] or explosives.[6]. The other important characteristic, i.e. the ultimate selectivity, should address differentiation between two isomers or very close homologs, still complicated by undeveloped approaches to the description of the basis of the smell.[12,13]. Several analytical techniques meet the demands for selective detection of isomers or homologs, such as photoacoustic sensors, which enable sensitivity down to sub-ppt level,[14] sensors based on Fourier-transform infrared spectroscopy (FTIR), which enable recognition of many analytes in the wavelength region of molecular ngerprints,[15] ion mobility mass spectrometry (IMS),[16] mass spectrometry (MS) coupled with liquid or gas chromatography (GC).[17]. While traditional MS methods handle the differentiation of particles using a mass-to-charge ratio, dri time IMS separation is directly based on particle collision cross-section,[18,19] enabling
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