Design, Fabrication and Mass-spectrometric Studies of a Micro Ion Source for High-Field Asymmetric Waveform Ion Mobility Spectrometry
| Autor: | Chaoqun Guo, Hongmei Yun, And Zhencheng Chen, Yongrong Jiang, Ruosheng Zeng, Xiaoxia Du, Hua Li |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Ion-mobility spectrometry high-field asymmetric ion mobility spectrometry (FAIMS) lcsh:Mechanical engineering and machinery Analytical chemistry 02 engineering and technology Mass spectrometry 01 natural sciences Article Ion Ionization lcsh:TJ1-1570 Electrical and Electronic Engineering ion source Glow discharge Mechanical Engineering 010401 analytical chemistry needle-to-cylinder lithographie galvanoformung and abformung (LIGA) 021001 nanoscience & nanotechnology Ion source 0104 chemical sciences Control and Systems Engineering Mass spectrum 0210 nano-technology LIGA |
| Zdroj: | Micromachines, Vol 10, Iss 5, p 286 (2019) Micromachines Volume 10 Issue 5 |
| Popis: | A needle-to-cylinder electrode, adopted as an ion source for high-field asymmetric ion mobility spectrometry (FAIMS), is designed and fabricated by lithographie, galvanoformung and abformung (LIGA) technology. The needle, with a tip diameter of 20 &mu m and thickness of 20 &mu m, and a cylinder, with a diameter of 400 &mu m, were connected to the negative high voltage and ground, respectively. A negative corona and glow discharge were realized. For acetone with a density of 99.7 ppm, ethanol with a density of 300 ppm, and acetic ether with a density of 99.3 ppm, the sample gas was ionized by the needle-to-cylinder chip and the ions were detected by an LTQ XL&trade (Thermo Scientific Corp.) mass spectrometer. The mass spectra show that the ions are mainly the protonated monomer, the proton bound dimer, and an ion-H2O molecule cluster. In tandem with a FAIMS system, the FAIMS spectra show that the resolving power increases with an increase in the RF voltage. The obtained experimental results showed that the micro needle-to-cylinder chip may serve as a miniature, low cost and non-radioactive ion source for FAIMS. |
| Databáze: | OpenAIRE |
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