Transformation of Light Polarization Using Nanoporous Alumina Films

Длугунович, В. А.; Zhumar, A. Yu.; Курилкина, С. Н.; Мухуров, Н. И.

doi:10.1007/s10812-015-0186-9

Cited by 3 publications

(1 citation statement)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[5][6][7] Also, the optical properties of alumina films show potential for RF transparency, light polarization, and broadband and wide-angle antireflection. [8][9][10] The development of materials with such superior properties is strongly linked to the understanding of the atomic structure dictated by the fabrication process. This has been illustrated for amorphous alumina films concerning, for example, the corrosion resistance measured by electrochemical impedance spectroscopy 5 or their superior mechanical properties (hardness and Young's modulus).…”

Section: Introductionmentioning

confidence: 99%

Atomic scale structure of amorphous aluminum oxyhydroxide, oxide and oxycarbide films probed by very high field²⁷Al nuclear magnetic resonance

Baggetto

Sarou‐Kanian

Florian

et al. 2017

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

The atomic scale structure of aluminum in amorphous alumina films processed by direct liquid injection chemical vapor deposition from aluminum tri-isopropoxide (ATI) and dimethyl isopropoxide (DMAI) is investigated by solid-state Al nuclear magnetic resonance (SSNMR) using a very high magnetic field of 20.0 T. This study is performed as a function of the deposition temperature in the range 300-560 °C, 150-450 °C, and 500-700 °C, for the films processed from ATI, DMAI (+HO), and DMAI (+O), respectively. While the majority of the films are composed of stoichiometric aluminum oxide, other samples are partially or fully hydroxylated at low temperature, or contain carbidic carbon when processed from DMAI above 500 °C. The quantitative analysis of the SSNMR experiments reveals that the local structure of these films is built from AlO, AlO, AlO and Al(O,C) units with minor proportions of the 6-fold aluminum coordination and significant amounts of oxycarbides in the films processed from DMAI (+O). The aluminum coordination distribution as well as the chemical shift distribution indicate that the films processed from DMAI present a higher degree of structural disorder compared to the films processed from ATI. Hydroxylation leads to an increase of the 6-fold coordination resulting from the trend of OH groups to integrate into AlO units. The evidence of an additional environment in films processed from DMAI (+O) by Al SSNMR and first-principle NMR calculations on AlC and AlOC crystal structures supports that carbon is located in Al(O,C) units. The concentration of this coordination environment strongly increases with increasing process temperature from 600 to 700 °C favoring a highly disordered structure and preventing from crystallizing into γ-alumina. The obtained results are a valuable guide to the selection of process conditions for the CVD of amorphous alumina films with regard to targeted applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Atomic scale structure of amorphous aluminum oxyhydroxide, oxide and oxycarbide films probed by very high field²⁷Al nuclear magnetic resonance

Baggetto

Sarou‐Kanian

Florian

et al. 2017

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

A universal basic for creating microsensory devices those are sensitive to changing environmental conditions

Мухуров¹,

Gasenkova²,

Zhang

et al. 2019

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

The main advantages of alumina technology and substrates of anodic alumina with a microrelief in the bulk of the substrate as a universal basis for creating microsensor devices are presented. Microsensors of various types allow you to monitor the state of the environment. Specific examples of the development of microsensory devices for detecting humidity, gas composition in the environment, and the presence of ionizing and ultraviolet radiation are presented.

show abstract

Glow of Metals during Anodization in Distilled Water

Ovechenko

Boychenko

2019

Tech. Phys. Lett.

View full text Add to dashboard Cite

Transformation of Light Polarization Using Nanoporous Alumina Films

Cited by 3 publications

References 35 publications

Atomic scale structure of amorphous aluminum oxyhydroxide, oxide and oxycarbide films probed by very high field²⁷Al nuclear magnetic resonance

Atomic scale structure of amorphous aluminum oxyhydroxide, oxide and oxycarbide films probed by very high field²⁷Al nuclear magnetic resonance

A universal basic for creating microsensory devices those are sensitive to changing environmental conditions

Glow of Metals during Anodization in Distilled Water

Contact Info

Product

Resources

About

Transformation of Light Polarization Using Nanoporous Alumina Films

Cited by 3 publications

References 35 publications

Atomic scale structure of amorphous aluminum oxyhydroxide, oxide and oxycarbide films probed by very high field27Al nuclear magnetic resonance

Atomic scale structure of amorphous aluminum oxyhydroxide, oxide and oxycarbide films probed by very high field27Al nuclear magnetic resonance

A universal basic for creating microsensory devices those are sensitive to changing environmental conditions

Glow of Metals during Anodization in Distilled Water

Contact Info

Product

Resources

About

Atomic scale structure of amorphous aluminum oxyhydroxide, oxide and oxycarbide films probed by very high field²⁷Al nuclear magnetic resonance

Atomic scale structure of amorphous aluminum oxyhydroxide, oxide and oxycarbide films probed by very high field²⁷Al nuclear magnetic resonance