The monitoring and control of gas flows are important in industrial applications, including fluid transport and delivery and in medical applications such as oxygen delivery and breath measurements. Flow sensors have been built on many principles including mass transport, mechanical measurements of flow and/or pressure, optical techniques, and many...

BTEX is a complex group of aromatic volatile organic compounds (Benzene, Toluene, Ethylbenzene, and Xylenes) associated with automobile exhaust pollution. Many epidemiological studies have linked elevated levels of BTEX to adverse human health effects. Measuring BTEX usually requires the use of gas chromatography and mass spectrometry (GC-MS)....

The ability to quickly and reliably detect minute changes in environmental conditions, including the presence of chemical, biological or other physical threats within a low-cost, miniaturized package would have broad impact across a variety of application. The presence or absence of specific chemicals and toxic gases in air, harmful compounds in...