Boron doping

Groner, P., Gimzewski, J., and Veprek, S., Boron and Doped Boron First Wall Coatings by Plasma CVD, / Nucl. Mater., 103(l-3) 257-260(1981)... 

Fig. 11.4.9 Crystal lattice of germanium with doped boron atoms.

A/dm2, Ni2+ ions discharge into Ni-B° occurs with enhance polarization in comparison with discharge into Ni°. The breaking of the Ni2+ ions discharge rate, when Ni-B° is electrodeposited (at the E< - 0,75), is connected with this alloy surface coverage by the adsorbed dope boron containing anions. So, for example, cathodic polarization at the ik = 2 AJ dm2 maintained the value 30 mV, and at the ik = 4 A/ dm2 - 45 mV. 

Figure 8.4 Calculated formation energies (Ef) of X-doped boron clusters. Ef is defined as Ef=Ex doped-(Enondoped+Ex), where Ex-doped is the total energy of the supercell with X-doped boron clusters and Enondoped is that of the undoped supercell. Ex is the total energy of the isolated atom X. Closed circle represents the value of the X B6 models and those of X B,2-co and X Birico are denoted by an asterisk and triangle, respectively. Open triangle indicates the model having the same structure as the X Birco model, and the common final structure is cubo-octahedral.

B203 and P205 modified silica as well as bentonite show similar selectivities as pentasil zeolites, but they deactivate much faster. The reason for that is the formation of trimers by aldolcondensation and aromatisation in the case of the nonshape selective materials. In contrast, the use of MFI-zeolites avoids the trimer formation due to the steric constraints and consecutive reactions resulting in coke. The aim of producing a fine chemical with 100% yield is achieved by the use of a Cs doped boron pentasil zeolite having an extremely weak acidity or basicity. 

These esters can be used as fragrances with harmonious fruit odor or as intermediates for the syntheses of herbicides (e.g. triazinones) and of L-amino acids. Also in this reaction, the weakly acidic boron pentasil zeolite and even better the Cs-doped boron pentasil zeolite are the most favored catalysts and are superior to other heterogeneous catalyst systems (Fig. 15.2). 

C. A. Desmond, C. E. Hunt, and S. N. Farrens, The effects of process-induced defects on the chemical selectivity of highly doped boron etch stops in silicon, J. Electrochem. Soc. 141, 178, 1994. 

X. Wu, J.L. Yang and X.C. Zeng, Adsorption of hydrogen molecules on the platinum-doped boron nitride nanotubes , The Journal of Chemical Physics, 125, 044704... 

The aim to produce a fine chemical with 100% yield is achieved by the use of a Cs-doped boron-pentasil zeolite having an extremely weak acidity. 

Telle R (1990) Structure and properties of Si-doped boron carbide. In Freer R (ed) The Physics and Chemistry of Carbides, Nitrides and Borides. Kluwer Academic Publishers, Dordrecht, p 249... 

Figure 43. Hot-pressed B-doped boron carbide with strain-induced polysynthetic twinning.

G.S. Corman and K.L. Luthra, Silicon-Doped Boron Nitride Fiber Coatings for Melt Infiltrated Composites, presented at the 24 annual Conference on Composites, Materials and Stmctures, Cocoa Beach, FL, January 24-28,2000. 

Determine the ligand field parameters for Cr in ruby, emerald, and alexandrite using the Tanabe-Sugano diagrams. What color would you expect a chromium-doped boron oxide glass to have Why ... 

Recently, Fabre et al. [31] and Freund et al. [7, 8] used electro-chemically deposited, self-doped, boronic-acid-substituted, conducting polymers for saccharide and fluoride detection. Freund et al. prepared a potentiometric sensor for saccharides using self-doped PABA [7, 8]. The transduction mechanism in that system is reportedly the change in pKa of polyaniline that accompanies complexation, and the resulting change in the electrochemical potential. Sensors produced with this approach exhibit reversible responses with selectivity to various saccharides and 1,2-diols (Figure 3.22) that reflect their binding constants with phenylboronic acid observed in bulk solutions. The sensitivity... 

To solve the problem, we considered that a boron-doped diamond, BDD, is the most ideal anode for electrochemical fluorination and so we focused on a BDD electrode. The BDD film is prepared on a carbon substrate by hot-filament chemical vapor deposition with doping boron into the diamond lattice, adding trimethylboran gas to a mixed gas of methane and hydrogen. Since a BDD film has a high electric conductivity and stability of structure such as diamond, it is expected that a BDD electrode can be used as a new anode material in this... 

Figure 18 Seebeck coefficient of p-rhombohedral boron according to the results obtained by different authors (see Ref. 2 and references therein). For interstitially doped boron with negative Seebeck coefficient,...

H Werheit, U Kuhlmann, M Laux, T Lundstrom. Structural and optical properties of Si-doped boron carbide. Proceedings of the 11th International Symposium on Boron, Borides and Related Compounds, Tsukuba, 1993. JJAP Series 10 86, 1994. 

As with many insulators, diamond can be transformed into a wide-gap semiconductor by appropriate doping. Boron practically is the only shallow acceptor dopant that makes diamond conducting at room temperature (most other dopants have too large an ionization energy) [5]. Recently, sulfur was suggested as an equally shallow donor dopant [6]. 

Tenones, M., Romo-Herrera, J.M., Cruz-Silva, E., Lopez-Urias, F., Munoz-Sandoval, E., Velazquez-Salazar, J.J., Tenones, H., Btmdo, Y, Golbetg, D. Rure and doped boron nitride ntniotubes. Mater. Today 10,30-38 (2007)... 

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