Dynamic Shadowing Growth and Its Energy Applications

Zhao, Yiping

doi:10.3389/fenrg.2014.00038

Cited by 16 publications

(9 citation statements)

References 106 publications

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“…2a) may locally decrease the thickness of the Mo films 65 . The self-shadowing effect is naturally present due to the uneven substrate features and as a result of a directional Mo vapor flux 66 . Consequently, the thickness of a deposited Mo film varies locally due to preferential deposition of the incident Mo atoms on higher surface points 67 .…”

Section: Resultsmentioning

confidence: 99%

Carbide-free one-zone sulfurization method grows thin MoS2 layers on polycrystalline CVD diamond

Sojková

Šiffalovič

Babchenko

et al. 2019

Sci Rep

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The last few decades faced on the fabrication of advanced engineering materials involving also different composites. Here, we report on the fabrication of few-layer molybdenum disulfide on top of thin polycrystalline diamond substrates with a high specific surface area. In the method, pre-deposited molybdenum coatings were sulfurized in a one-zone furnace at ambient pressure. As-prepared MoS2 layers were characterized by several techniques including grazing-incidence wide-angle X-ray scattering, atomic force microscopy, scanning electron microscopy, Raman spectroscopy and X-ray photoelectron spectroscopy. We found out that the initial thickness of Mo films determined the final c-axis crystallographic orientation of MoS2 layer as previously observed on other substrates. Even though it is well-known that Mo diffuses into diamond at elevated temperatures, the competing sulfurization applied effectively suppressed the diffusion and a chemical reaction between molybdenum and diamond. In particular, a Mo2C layer does not form at the interface between the Mo film and diamond substrate. The combination of diamond high specific surface area along with a controllable layer orientation might be attractive for applications, such as water splitting or water disinfection.

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Section: Resultsmentioning

confidence: 99%

Carbide-free one-zone sulfurization method grows thin MoS2 layers on polycrystalline CVD diamond

Sojková

Šiffalovič

Babchenko

et al. 2019

Sci Rep

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“…While Ag nanorods are one of the most prevalent tilted nanorod systems, glancing angle deposition (dynamic shadowing growth) is able to create nanorod arrays from a variety of materials, including metals, semiconductors, and various metal-oxides 23 . Our proposed EMT approach considering the polarization coupling effect can be readily applied for such versatile systems with a great flexibility and ease of computation.…”

Section: Resultsmentioning

confidence: 99%

“…Since the nanorods are assumed to be semi-infinite ( i . e ., their length is much longer than the optical penetration depth), the absorptance of TiNRs would approach the optical properties of vertically aligned carbon nanotubes 23 . Similar to AgNRs, an increase of the filling fraction from 0.1 to 0.3 will increase s − and p −polarized reflectance while decreasing the cross-polarization terms of R sp and R ps (Fig.…”

Section: Resultsmentioning

confidence: 99%

Effective Radiative Properties of Tilted Metallic Nanorod Arrays Considering Polarization Coupling

Lattery

Kim

Choi

et al. 2018

Sci Rep

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With the advent of new nanomanufacturing techniques has come the rise of the field of nanophotonics and an increased need to determine optical properties of novel structures. Commercial software packages are able to estimate the behavior, but require large resources and heavy computational time. By combining coordinate transforms and Effective Medium Theory (EMT), an effective relative permittivity tensor is defined and further exploited to calculate the polarization-coupled Fresnel coefficients through Maxwell’s equations. A uniaxial simplification is made to show the case of tilted nanorod arrays. To demonstrate the flexibility of this system, the interfacial reflectance has been calculated for both s- and p-polarizations as well as the coupled case with the volume filling fractions of f = 0.10 and 0.30 for silver (Ag) and titanium (Ti) nanorods, and a scenario of a Ag nanorod array with polymethyl methacrylate (PMMA) as the surrounding medium. The exact results computed by the finite-difference time-domain method justify the validity of EMT with polarization coupling taken into account. The effects of incidence angle and azimuthal angle on reflectance are also discussed. The relatively simple nature of this approach allows for fast estimations of the optical properties of various nanostructures.

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“…The nanorod arrays were fabricated in a custom designed electron-beam deposition system (Torr International, Inc.) [13,33]. Fe 2 O 3 nanorods was first deposited onto Si and/or glass substrates with the incident angle θ = 86º, with the substrate rotating azimuthally at 0.5 rev/s.…”

Section: Fe 2 O 3 -Tio 2 Core-shell Nanorod Arrays Preparationmentioning

confidence: 99%

Fe2O3–TiO2 core–shell nanorod arrays for visible light photocatalytic applications

et al. 2016

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By using the glancing angle deposition technique and post-deposition annealing, Fe 2 O 3-TiO 2 core-shell nanorod arrays with specific crystalline states can be designed and fabricated. The Fe 2 O 3-TiO 2 core-shell samples annealed at temperatures greater than 450°C formed α-Fe 2 O 3 and anatase TiO 2 , and showed higher catalytic efficiency for the degradation of methylene blue (MB) under visible light illumination when compared with pure anatase TiO 2 or α-Fe 2 O 3 nanorod arrays. Solar conversion of carbon dioxide and water vapor in the presence of Fe 2 O 3-TiO 2 coreshell nanorod arrays was also investigated. Carbon monoxide, hydrogen, methane, and methanol along with other hydrocarbons were produced after only several hours' exposure under ambient

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Dynamic Shadowing Growth and Its Energy Applications

Cited by 16 publications

References 106 publications

Carbide-free one-zone sulfurization method grows thin MoS2 layers on polycrystalline CVD diamond

Carbide-free one-zone sulfurization method grows thin MoS2 layers on polycrystalline CVD diamond

Effective Radiative Properties of Tilted Metallic Nanorod Arrays Considering Polarization Coupling

Fe2O3–TiO2 core–shell nanorod arrays for visible light photocatalytic applications

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