Specific features of the formation of terrace-step nanostructures on the (0001) surface of sapphire crystals

Буташин, А. В.; Власов, В. П.; Каневский, В. М.; Муслимов, А. Э.; Федоров, В. А.

doi:10.1134/s1063774512060193

Cited by 30 publications

(10 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Step periodicity in vicinal surfaces was previously reported to correlate with the miscut angle with respect to the low surface energyplanes 24,28 . We postulated that the step periodicity in our polycrystalline gold films was related to the GOA.…”

mentioning

confidence: 79%

Association Between Gold Grain Orientation and Its Periodic Steps Formed at the Gold/Substrate Interface

et al. 2018

View full text Add to dashboard Cite

Nanoscale step structures have attracted recent interest owing to their importance in both fundamental and applied research, for example in adsorption, in catalysis, and in directing nanowire growth. Here, we used a template-stripping method to obtain vicinal-like surface structures on grains of polycrystalline gold and investigated the effect of annealing temperature on the formation of these surfaces. Our results uncovered a correlation between the grain orientation angle (GOA) and the step periodicity and crystallographic direction on identical grains. The GOA was measured by determining the electron backscatter diffraction with respect to the sample's normal direction. Using scanning tunneling microscopy to examine identical grains, we found that their step periodicity decreases with increasing GOA.These results provide further understanding of the formation of periodically atomic gold steps at the gold/substrate interface, and thus might have promising potential for the directing growth of nanowires in microelectronics.

show abstract

mentioning

confidence: 79%

Association Between Gold Grain Orientation and Its Periodic Steps Formed at the Gold/Substrate Interface

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Пластины базисной (0001)-плоскости сапфира, обработанные химико-механическим способом, подвергались дополнительному отжигу при температуре 1100 • С. Этап дополнительного отжига приводил к модифицированию поверхности с образованием террасно-ступенчатой наноструктуры [11]. Такой подход позволяет улучшать структурное совершенство пленки [12].…”

Section: материалы и методыunclassified

Рентгенолюминесценция Толстых Пленок Оксида Цинка

Веневцев¹,

Родный²,

Муслимов³

et al. 2019

Журнал Технической Физики

View full text Add to dashboard Cite

Studies of thick films (approximately 30 μm) of undoped zinc oxide on sapphire substrate obtained by magnetron sputtering method with the use of an uncooled target were conducted. The structural and luminescent properties of the initial films and films that underwent additional recrystallization annealing in the air were investigated. The time and temperature dependent characteristics of the samples were considered. It was shown that annealing in air leads to an improvement in the structural, optical, and luminescent properties of the obtained film.

show abstract

“…As substrate, C-cut sapphire was considered due to its high mechanical and chemical stability and optical transparency [24][25][26][27]. The effect of substrate treatment on the orientation and crystallinity of YSZ grown by pulsed-laser deposition (PLD) is studied and the propagation loss of rib optical waveguides reported for two YSZ orientations.…”

Section: Introductionmentioning

confidence: 99%

High-quality crystalline yttria-stabilized-zirconia thin layer for photonic applications

Marcaud

Matzen

Alonso‐Ramos

et al. 2018

Phys. Rev. Materials

View full text Add to dashboard Cite

Functional oxides are considered as promising materials for photonic applications due to their extraordinary and various optical properties. Especially, yttria-stabilized zirconia (YSZ) has a high refractive index (∼2.15), leading to a good confinement of the optical mode in waveguides. Furthermore, YSZ can also be used as a buffer layer to expand toward a large family of oxides-based thin-films heterostructures. In this paper, we report a complete study of the structural properties of YSZ for the development of integrated optical devices on sapphire in telecom wavelength range. The substrate preparation and the epitaxial growth using pulsed-laser deposition technique have been studied and optimized. High-quality YSZ thin films with remarkably sharp x-ray diffraction rocking curve peaks in 10 −3 • range have then been grown on sapphire (0001). It was demonstrated that a thermal annealing of sapphire substrate before the YSZ growth allowed controlling the out-of-plane orientation of the YSZ thin film. Single-mode waveguides were finally designed, fabricated, and characterized for two different main orientations of high-quality YSZ (001) and (111). Propagation loss as low as 2 dB/cm at a wavelength of 1380 nm has been demonstrated for both orientations. These results pave the way for the development of a functional oxides-based photonics platform for numerous applications including on-chip optical communications and sensing.

show abstract

Specific features of the formation of terrace-step nanostructures on the (0001) surface of sapphire crystals

Cited by 30 publications

References 22 publications

Association Between Gold Grain Orientation and Its Periodic Steps Formed at the Gold/Substrate Interface

Association Between Gold Grain Orientation and Its Periodic Steps Formed at the Gold/Substrate Interface

Рентгенолюминесценция Толстых Пленок Оксида Цинка

High-quality crystalline yttria-stabilized-zirconia thin layer for photonic applications

Contact Info

Product

Resources

About