The volatile organic compounds(VOCs) are emitted by a wide array of products, which include a variety of chemicals, some of them may have short- and long-term adverse health effects. Several analytical instrument incl...The volatile organic compounds(VOCs) are emitted by a wide array of products, which include a variety of chemicals, some of them may have short- and long-term adverse health effects. Several analytical instrument including gas chromatograph, high preferment liquid chromatograph, mass spectrometry and solid phase microextraction (SPME) technique were used in this study. The results showed the aldehyde and ketone components of Chinese fir wood were little composed of formaldehyde, syn- acetaldehyde, anti-acetadehyde and acrolein, VOCs obtained by Tenax GR absorber consisted of the major component cedrene (42.92%) and another 28 components, and the major components of the VOCs from the sample by using solid phase microextraction (SPME) technique were cedrene and cedrol.展开更多
In the current research,the use of a micromachined cantilever resonator as a platform for chemical gas sensing was examined.The microcantilever resonator integrates an electrothermal driving unit and a piezoresistive ...In the current research,the use of a micromachined cantilever resonator as a platform for chemical gas sensing was examined.The microcantilever resonator integrates an electrothermal driving unit and a piezoresistive detecting unit,and it is fabricated by direct bonding a silicon-on-insulator（SOI） wafer.With a particular polymer layer coated on the surface of the microcantilever,a gas sensor for volatile organic components（VOCs） detection can be realized.The operation mechanism provides the microcantilever resonator with integrated circuit（IC） compatibility in terms of both the fabrication process and operating voltage.The configuration of the microcantilever resonator can optimize the performance of the gas sensor.The SOI wafer provides a solution for the integrated fabrication of the microstructure,transducers,electronics,and the precise control of the resonator parameters.In this paper,the principles,design,analysis,process,and demonstration of the gas sensor based on the microcantilever resonator are presented.The experimental results provide confirmation that the polymer-coated microcantilever resonator has excellent performance with regard to VOC detection.展开更多
基金Supported by key foundation research project (G1999016001) of China and Japan International Cooperation Agency.
文摘The volatile organic compounds(VOCs) are emitted by a wide array of products, which include a variety of chemicals, some of them may have short- and long-term adverse health effects. Several analytical instrument including gas chromatograph, high preferment liquid chromatograph, mass spectrometry and solid phase microextraction (SPME) technique were used in this study. The results showed the aldehyde and ketone components of Chinese fir wood were little composed of formaldehyde, syn- acetaldehyde, anti-acetadehyde and acrolein, VOCs obtained by Tenax GR absorber consisted of the major component cedrene (42.92%) and another 28 components, and the major components of the VOCs from the sample by using solid phase microextraction (SPME) technique were cedrene and cedrol.
基金Supported by the National Natural Science Foundation of China (No 50605040)
文摘In the current research,the use of a micromachined cantilever resonator as a platform for chemical gas sensing was examined.The microcantilever resonator integrates an electrothermal driving unit and a piezoresistive detecting unit,and it is fabricated by direct bonding a silicon-on-insulator（SOI） wafer.With a particular polymer layer coated on the surface of the microcantilever,a gas sensor for volatile organic components（VOCs） detection can be realized.The operation mechanism provides the microcantilever resonator with integrated circuit（IC） compatibility in terms of both the fabrication process and operating voltage.The configuration of the microcantilever resonator can optimize the performance of the gas sensor.The SOI wafer provides a solution for the integrated fabrication of the microstructure,transducers,electronics,and the precise control of the resonator parameters.In this paper,the principles,design,analysis,process,and demonstration of the gas sensor based on the microcantilever resonator are presented.The experimental results provide confirmation that the polymer-coated microcantilever resonator has excellent performance with regard to VOC detection.
