Zobrazeno 1 - 10
of 186
pro vyhledávání: '"John B. Higgins"'
Publikováno v:
physica status solidi (a). 205:2886-2891
This paper reports the metalorganic vapor phase epitaxy (MOVPE) of InN on GaN/sapphire templates by pulsed growth mode. Photoluminescence analysis of the films has been performed both at room temperature (T = 300 K) and low temperature (T = 77 K). At
Publikováno v:
Journal of Crystal Growth. 310:4947-4953
a b s t r a c t In this study, we report on the pulsed metalorganic vapor phase epitaxy (MOVPE) of InN as well as the optical and electronic properties of the films as a function of V/III ratio and growth temperatures. The growth of InN films was con
Publikováno v:
physica status solidi (a). 205:1619-1624
This paper reports the study of MOVPE of InN on GaN templates grown on sapphire and silicon(111) substrates. Thermodynamic analysis of MOVPE of InN performed using NH3 as nitrogen source and the experimental findings support the droplet-free epitaxia
Autor:
Fadi H. Khouri, Matthew R. Galler, Richard G. Herman, Courtney R. Terenna, John B. Higgins, Kamil Klier
Publikováno v:
Journal of Catalysis. 228:347-361
A propylsulfonic acid-derivatized mesoporous SBA-15 catalyst was examined for activity and selectivity in the dehydrocondensation of methanol and isobutanol to form ethers, principally methyl isobutyl ether (MIBE) and dimethyl ether (DME), and dehydr
Autor:
Kirk D. Schmitt, John B. Higgins
Publikováno v:
Zeolites. 16:236-244
A reproducible, scaleable synthesis of ZSM-10 is reported. This synthesis is dependent on the presence of 1,4-dimethyl-DABCO cations during the nucleation/aging stage, but this directing agent is not incorporated in the final product. Analysis of the
Publikováno v:
Solid State Nuclear Magnetic Resonance. 4:173-178
AlPO4-H2 is a microporous hydrated aluminophosphate, structurally related to VPI-5, whose framework has highly elliptical 10-ring channels (2.9 × 7.6 A) parallel to the c crystallographic axis. To resolve a previously reported discrepancy between nu
Autor:
John B. Higgins
Publikováno v:
Catalysis Today. 19:7-26
Publikováno v:
ChemInform. 24
We report the first synthesis of pure aluminophosphate hydrate H2 (AlPO4-H2) and its structure; AlPO4-H2 is constructed exclusively from a hydrated chain building unit that also builds the 18-ring VPI-5 structure and has one-dimensional channels circ
Publikováno v:
Zeolites. 10:293-296
ZSM-57 is a new zeolitic phase with a novel framework topology: structure code MFS, space group lmm2, a = 7.4510(7)A, b = 14.1711(8)A, c = 18.767(2)A, 18.2T/1000 A3. Although the structure is closely related to ZSM-35 (FER), ZSM-57 has 4-rings lackin