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Existing non-invasive lung cancer diagnostic equipment has difficulty in detecting early stage lung cancer as abnormal tissue is smaller than 0.5cm in size. According to studies showing that volatile organic compounds (VOCs) from human breath gas can provide biomarkers for human disease, especially for lung cancer [1], a non-invasive method was developed to measure the exhaled air from cancer patients...
A photoactivated gas detector operated at room temperature is microfabricated using a simple sol-gel process. Prior to ultraviolet (UV) illumination, water-soluble compounds (short-chain alcohols) are dissociated in the thin water film on the surface and are detected. However, less water-soluble compounds were not detected because of these water layers. With the increase...
A complementary metal-oxide-semiconductor (CMOS)-based gas sensor platform using a commercially available 0.35 µm CMOS process and the microelectromechanical systems (MEMS) post process was developed in this work. An n-type polysilicon microheater with ∼2 kΩ and a metal thermometer with ∼1 kΩ were integrated within this platform to provide a temperature programming for sensing film preparations and...
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