Liu Wenqing

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In the emerging field of nanobiotechnology, further downsizing the fluidic channels to the nanometer scale is attractive for both fundamental studies and technical applications. The insulation Silicon nitride membrane nanofluidic channel array which have width∼75nm and depth ∼ 100nm and length 50μm were created by focused-ion- beam(More)
It's necessary to study vehicle emission characteristics and emission factors for establishing vehicle emission inventory and the corresponding control strategy. The paper presents the results of on-board exhaust emission tests of diesel and Compressed Natural Gas vehicles under real road conditions of city traffic using a PEMS equipment. The results show(More)
Differential optical absorption spectroscopy (DOAS) has become a widely used method to measure trace gases in the atmosphere. Concentration of trace gases is retrieved by fitting reference spectra to the atmospheric absorption spectra. There were large errors in retrieved results, when absorption structures were heavily overlapped and the noises were high.(More)
Nitric oxide (NO) and carbon monoxide (CO) in Shanghai urban atmosphere have been measured during the EXPO 2010 by an optical trace gas monitoring system based on room-temperature pulsed quantum cascade lasers (QCL). The results showed obvious diurnal variation in their concentrations. A great correlation was found by analyzing the diurnal variation,(More)
This article describes the experiment of airborne Fourier transform infrared (FTIR) spectrometer detecting the background radiation of earth and atmosphere. Considering the atmospheric absorbance and emission, the relation between radiation measured by FTIR and surface emissivity was analysed and theoretic expression was given. It was proved that the(More)
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