Okamoto cavity

Most interesting is the use of the Okamoto cavity as an ion source for mass spectrometry [736]. Here, a torch similar to the ICP torch is positioned inside a micro-wave resonator and a plasma is operated mostly in nitrogen at a power in excess of 1 kW (Fig. 139) [737]. It was found that aerosols produced by pneumatic nebulization of liquids could easily be introduced into such a system. They penetrate... 

Fig. 139. Okamoto cavity. (Reproduced with permission from Ref. [737].)...

Figure 3.6-10 Schematic diagram of a femtosecond time-resolved CARS apparatus. YAG, cw mode-locked Nd YAG laser ML, mode locker PL, polarizer A s, apertures LP, laser pot DM, dichroic mirror DLl, femtosecond dye laser SA, saturable absorber CLFB, cavity-length feedback system DL2, picosecond dye laser W, tuning wedge E, etalon FD, fixed delay VD, variable delay BS, beam splitter P s, half-wave plates (when necessary) F s, filters S, sample MC, monochromator PMT, cooled photomultiplier. (Okamoto and Yoshihara, 1990).

Hexacarbonyl molybdenum Mo(CO)6 was successfully used to prepare intrazeolite molybdenum sulfide clusters in the cavities of NaY (CVD technique) [4,5,7,8]. The decomposition and sulfidation of Mo(CO)e encaged in NaY were extensively studied by Okamoto et al. [7-11] by means of temperature programmed decomposition (TPDE), XPS, and XAFS techniques. It has been claimed that the structure of molybdenum sulfides is described as molybdenum dinuclear sulfide clusters M02S4. de Bont et al. [12] supported the formation of molybdenum sulfide dimer species. The extremely high dispersion of molybdenum sulfide clusters prepared fi"om Mo(CO)6 was also suggested by an NO adsorption capacity much hi er than those of other conventional catalyst systems such as M0S2/AI2O3 [9]. 

Figure 8.21. (a) LCST type phase diagram showing the processing temperatures for cPCYSAN blends, (b) Time-dependent temperature of the blend within a mold cavity after injection [Okamoto et al., 1995]. 

One early research example is Tsujita Y, Yoshimizu H, Okamoto S et al. (2005) Smart membrane Preparation of molecular cavity and preferential sorption of small molecule. J. Mol. Struct. 739 3-12. 

I. Tanaka, G. Pezzotti, K. Matsushita, Y. Miyamoto and T. Okamoto, Impurity Enhanced Cavity Formation in Si3N4 at Elevated Temperatures , J. Am. Ceram. Soc., 74, 1992, 752-59. 

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