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Ionization source for nano array modified enhanced photoelectronic emission based on vacuum ultraviolet light

A technology of vacuum ultraviolet light and nano-array, which is applied in the field of ionization source to achieve the effect of improving stability

Active Publication Date: 2015-05-27
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

In order to solve the problem of photoelectron emission efficiency and ionization source stability based on vacuum ultraviolet ionization source

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  • Ionization source for nano array modified enhanced photoelectronic emission based on vacuum ultraviolet light

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Embodiment Construction

[0022] see figure 1 , is a structural representation of the present invention. The ionization source of the present invention is an ionization source based on nano-array modification of vacuum ultraviolet light to enhance photoelectron emission. There is a sample gas capillary 3 interface on the wall of the cavity 2; the sample gas capillary 3 enters the inside of the ionization chamber through the sample gas capillary 3 interface on the side wall of the ionization chamber cavity 2 respectively; the gas outlet of the sample gas capillary 3 is located at the transmission electrode and the differential hole Between the electrodes or between the transmission electrodes and the transmission electrodes; the gas outlet end of the sample gas capillary 3 is perpendicular to the ultraviolet light beam emitted by the ultraviolet light source 1 .

[0023] One side surface of the differential hole electrode 5 irradiated by ultraviolet light is a surface 9 modified with a nano-gold array,...

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Abstract

The invention relates to a mass spectrometry analyzer, in particular to an ionization source for nano array modified enhanced photoelectronic emission based on vacuum ultraviolet light. The ionization source comprises a vacuum ultraviolet light source and an ionization chamber, wherein a plurality of transmission electrodes and vacuum differential pore electrodes are arranged in parallel at intervals inside the ionization chamber; nano gold arrays are deposited on the surfaces of the pore electrodes; the heights of the nano gold arrays are about dozens and hundreds of nanometers; through holes are formed in the axis directions of the electrodes; ultraviolet light emitted from a vacuum ultraviolet light source radiates to the pore electrodes in the axial direction; direct-current voltage is respectively applied to the transmission electrodes and the pore electrodes. According to the ionization source provided by the invention, a surface plasma resonance effect of the nano gold array is utilized, the efficiency in generating photoelectron from a vacuum ultraviolet lamp can be improved, the sensitivity is improved under the condition that the light intensity of the ultraviolet lamp is not changed, and in addition, due to oxidation resistance of the gold surface self, contamination of an oxidation gas to the surface of the metal electrode is alleviated, and the stability of the ionization source is improved.

Description

technical field [0001] The invention relates to a mass spectrometer analysis instrument, in particular to an ionization source based on nano-array modification of vacuum ultraviolet light to enhance photoelectron emission. Based on the vacuum ultraviolet light source, the present invention utilizes the plasmon resonance effect of the nano-gold array to enhance the photoelectrons emitted by the photoelectric effect, and enhance the sensitivity of the ionization source without changing the intensity of the ultraviolet light; in addition, the gold surface itself is used The excellent oxidation resistance can reduce the pollution of oxidizing gas on the surface of metal electrodes and improve the stability of ionization source. Background technique [0002] Vacuum ultraviolet light can single-photon ionize organic molecules whose ionization energy (IE) is lower than its photon energy, mainly generating molecular ions with almost no fragment ions, suitable for rapid qualitative a...

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Application Information

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IPC IPC(8): H01J49/08H01J49/16
CPCH01J49/08H01J49/162H01J49/26
Inventor 李海洋陈平侯可勇花磊谢园园赵无垛蒋吉春刘巍
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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