|FT-ICR Studies of Clusters|
Japanese mode is here.
A Home-made FT-ICR (Fourier Transform Ion Cyclotron Resonance) spectrometer with a direct injection laser-vaporization-supersonic-expansion cluster beam source is implemented. Carbon, carbon-metal, silicon clusters are currently studied.
[What is fullerene?]
[What is FT-ICR?]
[How you can get mass spectrum]
[Example of high mass resolution]
What is fullerene?
Closed caged molecules of carbon such as C60 and C70. It is considered to be the 3rd form of carbon in addition to diamond and graphite. The following figures shows examples of fullerene.
Typical Structures of
What is FT-ICR?
Heart of FT-ICR(Fourier
Transform Ion Cyclotron Resonance) mass spectrometer is the ICR
cell installed in the strong magnetic field of 6 T. As shown in
the figure our ICR cell consists of 4 sectors of electrodes. The
inner diameter is 42 mm, and the length is 150 mm. Two opponent
sectors are Excite and other two are Detect. An
ion in the magnetic field makes a ion cyclotron motion with f =
qB/2pm. Hence, the frequency is
inversely proportional to the mass m.
Fig.2 Schematics of ICR cell.
to get a spectrum
Fig.3 Example of Excite and Detect waveforms.
Fig.4 FT-ICR (Fourier Transform Ion Cyclotron Resonance) Mass Spectrometer
High Mass Resolution
<==Click To ZOOM
Number of Carbon Atoms or Atomic Mass Unit
Please contactmaruyama [at] photon.t.u-tokyo.ac.jp
Home Page of Prof. Shigeo Maruyama
Home Page of Shoji-Maruyama Lab.