期刊
MICROCHIMICA ACTA
卷 185, 期 8, 页码 -出版社
SPRINGER WIEN
DOI: 10.1007/s00604-018-2882-7
关键词
Tellurium nanorod; Hydrothermal method; MALDI-TOF MS; Negative ion mode; Electronic transitions mechanism; Laser-induced thermal mechanism
资金
- National Key R&D Program of China [2017YFC0906800]
- National Natural Science Foundation of China [21635006, 21475098, 31670373, 21605117]
Two-dimensional tellurium nanosheets were prepared by a hydrothermal method and characterized by scanning electron microscopy, powder X-ray diffractometry, and UV-vis spectroscopy. The nanosheets were explored as a novel matrix for desorption/ionization of small molecules including nucleobases, fatty acids and amino acids by matrix assisted laser desorption/ionization time-of-flight mass spectrometry. The results show that the tellurium nanosheets have good UV light absorption, cause low matrix ion interference in the low-molecule-mass region, and have high desorption/ionization efficiency in the negative ion mode. Hence, they are a viable matrix for negative ion desorption/ionization in MALDI-TOF MS of small molecules. In order to investigate the desorption/ionization mechanisms, benzylpyridinium salt and bisphenol A were adopted as probes. The results show that both of the electronic transitions mechanism and laser-induced thermal mechanism play important roles in desorption/ionization process.
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