Physical Chemistry of Cold Gas-Phase Functional Molecules and Clusters by Takayuki Ebata & Masaaki Fujii

Author:Takayuki Ebata & Masaaki Fujii
Language: eng
Format: epub
ISBN: 9789811393716
Publisher: Springer Singapore

7.2 Experimental Methods for Gas Phase Nanoclusters

7.2.1 Dual-Laser Vaporization Nanocluster Source

Figure 7.2 shows a schematic of the NC source of face-to-face laser plasma mixed with pulsed helium (He) carrier gas [44, 45]. An Even-Lavie pulsed valve with a high stagnation pressure of 60–100 atm. [46] was used at a repetition rate of 10 Hz, which was suitable for the effective formation of MSi n+/0/– and XAl n+/0/–. Intense supersonic He gas pulses were operated to recombine and cool the laser-ablated metal vapor. The optimum laser fluence required to maximize the NC intensities depends on the properties of the target under investigation; specifically, the dual-laser vaporization method allows control of the elemental mixing ratio.

Fig. 7.2Schematic of a dual-laser vaporization NC source with two sample rods, two pulsed valves, and a reaction room.

Reproduced from Ref. [45] with permission from The Chemical Society of Japan

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