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Your search keyword '"Suwito, Galih R"' showing total 9 results
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9 results on '"Suwito, Galih R"'

1. Nucleation of InP on Si under micro-crucibles at ultra-high vacuum using a two-step VLS process.

Author

Suwito, Galih R, Haffouz, Sofiane, Dalacu, Dan, Poole, Philip J, and Quitoriano, Nathaniel J

Subjects
*ULTRAHIGH vacuum, *NUCLEATION, *METAL catalysts, *SUBSTRATES (Materials science), *ADATOMS, *ATOMS, *SURFACE diffusion, *GOLD catalysts
Abstract

We reported nucleation mechanisms of InP directly on Si (8% lattice mismatch) under confined structures, called micro-crucibles, at ultra-high vacuum (UHV) by chemical beam epitaxy. These micro-crucibles are used to induce lateral growth in the presence of a micro-scale Au catalyst. It is found that at this UHV condition, the kinetics is dictated predominantly by adatom surface diffusion. Using a two-step growth process ((1) In-only exposure, then, (2) simultaneous In and P exposures), InP islands have been successfully nucleated on Si substrates under micro-crucible structures. The nucleation of these InP islands strongly depends on the metal catalyst location relative to the micro-crucible opening with metal catalysts residing closer to the opening having a higher chance to get incorporated with In and P atoms. Importantly, we found that using smaller micro-crucibles with double openings can increase the possibility of having metal catalysts reside near either opening and nucleate InP under micro-crucibles. [ABSTRACT FROM AUTHOR]

Published
2024
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4. Gold price simulation under quantum mechanical perspective.

Author

Suwito, Galih R. and Ardian, Aldin

Subjects
*GOLD mining, *GOLD, *WAVE functions, *QUANTUM mechanics, *EXCITED states
Abstract

Gold price is an impactful variable in the gold mine project evaluation. The gold price is one of the most discussed variables in the literatures due to its uncertainty. In the gold mine project evaluation, gold price modeling is one activity commonly done to anticipate the project's risk. In this study, the gold prices within certain periods of time were modeled using quantum mechanics (QM) as a particle in a one-dimensional infinite well. Using this analogy, we demonstrate that the associated wave function leads to a Born probability density which could explain the gold price uncertainty. In addition, QM views the gold price distribution having multiple peaks, which actually happened in some periods of time, as a confined particle in an excited state. Essentially, this research proposed a gold mine project risk analysis where the probability distribution of the gold prices follows the QM perspective. The approach can also be used for different mining project and different uncertain variables by adjusting the QM parameters. [ABSTRACT FROM AUTHOR]

Published
2021
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