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题名: Mass Measurement of Single Intact Nanoparticles in a Cylindrical Ion Trap
作者: Zhang, Ning1; Zhu, Kai2; Xiong, Caiqiao1; Jiang, Yurong2; Chang, Huan-Cheng3; Nie, Zongxiu1, 4
刊名: ANALYTICAL CHEMISTRY
发表日期: 2016-06-07
卷: 88, 期:11, 页:5958-5962
收录类别: SCI
英文摘要: Accurate nanoparticle mass characterization is a challenging task, especially at a single particle level. To solve this problem, a strategy for the mass measurement of single intact nanoparticle was proposed. A microscopy-based ion trap mass spectrometer was built up. To improve the detection sensitivity, a cylindrical ion trap with transparent conductive end-caps was used to increase the transmission of scattered light, and a vacuum ultraviolet lamp was used to increase the charge state of the isolated nanoparticle. By detecting the scattered light of the isolated nanoparticle, a series of secular frequencies were obtained, from which the corresponding mass-to-charge ratio of the nanoparticle was calculated. Finally, a Labview program was used to help deduce the charge state and absolute mass of the individual nanoparticle. Masses of gold nanoparticles with different sizes were accurately examined, which are (5.08 +/- 0.44) x 10(7) Da for 20 nm, (3.55 +/- 0.34) X 10(8) Da for 40 nm, and (1.22 +/- 0.14) x 10(9) Da for 60 nm, respectively. The mass of MOFs with irregular shapes was also determined, which is (6.48 +/- 1.08) x 10(9) Da. This method can provide the mass information on nanomaterials, thus opens up new possibility of characterizing nanoparticles at the single particle level.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35737
Appears in Collections:活体分析化学实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Chem, Key Lab Analyt Chem Living Biosyst, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
2.Beijing Inst Technol, Dept Opt Engn, Beijing 100081, Peoples R China
3.Acad Sinica, Inst Atom & Mol Sci, Taipei 106, Taiwan
4.Natl Ctr Mass Spectrometry Beijing, Beijing 100190, Peoples R China
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