Vapor transport method

Shibata, T. Muranushi, Y. Miura, T. Kishi, T. 1991. Electrical characterization of 2H-SnS2 single crystals synthesized by the low temperature chemical vapor transport method. J. Phys. Chem. Solids 52 551-553. 

Figure 3. Two entangled spiral WS2 nanotubes obtained by the chemical vapor transport method (9).

P5Trite and calcite are mineral crystals that represent a wide Habitus and Tracht variation. Pyrite is the most persistent mineral among sulfide minerals, occurring in a wide range of modes, including inorganic processes and bacterial action, and it can also be synthesized by hydrothermal or chemical vapor transport methods. 

The fact that Teg has never been synthesized by symproportionation nicely proves that new, unprecedented cluster species may be synthesized if some imagination is used in the choice of oxidizing agent and Lewis acid. Other chalcogenide clusters, low-dimensional bismuth iodides and mixed clusters sueh as Te6l2 have recently been synthesized by similar vapor transport methods. ... 

Bol] investigated thermodynamic properties of the phases in the CoSi-FeSi and CoSi2-FeSi2 sections by chemical vapor transport methods. For the first section the composition dependences of enthalpy, entropy and heat capacity were given. 

As a pyrometallurgical approach, Ozaki et al. (1999) studied the appUcatimi of the chemical vapor transport method described in Section 2.3.1. Used polishing powder was chlorinated by chlorine gas at 1000 °C, and transported along the temperature gradient via gaseous complex with aluminum chloride. The rare-earth chlorides were mainly crmdensed over the temperature range of 457-947 C. The purity of the rare-earth chlorides in this temperature range was about 95%. 

Figure 8.18. The vapor transport method for the growth of magnetite crystals. At a high temperature powder reacts with a reactive gas (HCl) at low pressure to volatile compounds. These decompose at a lower temperature in another part of the closed reactor. HCl is formed there and diffuses back to react again with the powder.

Table 8.5. Selected Crystals Grown with the Vapor Transport Method...

Several methods have been developed to synthesize inorganic fullerenes and nanotubes based on layered MS2 [45-50]. They include arc discharge, laser ablation techniques, electron beam irradiation of MS2 crystals, chemical transport reaction, and precursor synthesis approach [50,54-58]. The chemical vapor transport method, which was discussed earlier, has also been used to synthesize both M0S2 and WS2 nanotubes. 

From infrared cyclotron resonance in n-type ZnO grown by seeded chemical vapor transport method (Eagle—Picher). The value in parentheses (0.29) is the effective polaron mass [78]. 

Reynolds et al. [23] (bulk crystals grown by a seeded physical vapor transport method). Thonke et al. [45] (bulk crystals grown by seeded chemical vapor transport). 

One of the reports of dielectric functions of ZnO is that by Ashkenov et al. [135] who characterized thin films grown by pulsed laser deposition on c-plane sapphire and a single-crystalline sample grown by seeded chemical vapor transport method. The static dielectric constant was obtained from infrared spectroscopic ellipsometry measurements. The high-frequency dielectric constant was calculated through the Lyddane-Sachs-Teller (LST) relation, (Equation 1.31), using the static constant and the TO- and LO-phonon mode frequencies. The results are compared with the data from some of the previous studies in Table 3.8. 

A rich variety of nanostructures can be grown using the vapor transport method, which is based on transport of Zn and O vapor on to a substrate where they react to... 

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