scholarly journals D.C. Sputtering Process: Its Characterization and its Problems When Applied to Tin-Dioxide Thin-Films

1980 ◽  
Vol 7 (1-3) ◽  
pp. 19-22 ◽  
Author(s):  
Anant G. Sabnis
Keyword(s):  
Thin Films ◽  
Tin Dioxide ◽  
Film Properties ◽  
Deposition Parameters ◽  
Areas Of Concern

This paper discusses the problems involved in obtaining reliable and reproducible thin films of Sb-doped SnO2films by the d.c. sputtering process. An attempt to characterize the process is made by correlating the deposition parameters with the factors that contribute to the conductivity of the SnO2films. The areas of concern are identified, and guidelines are offered for making the process and the film properties controllable.

The Optimization of Niobium Diselenide Thin Films Through Control of Pulsed Laser Deposition Parameters

1992 ◽  
Vol 285 ◽  
Author(s):  
Allan E. Day ◽  
Samuel J.P. Laube ◽  
M.S. Donley ◽  
J.S. Zabinski
Keyword(s):  
Thin Films ◽  
Pulsed Laser Deposition ◽  
Pulsed Laser ◽  
Optimal Growth ◽  
Growth Conditions ◽  
Laser Deposition ◽  
Film Properties ◽  
Niobium Diselenide ◽  
Deposition Parameters ◽  
And Control

ABSTRACTNiobium diselenide has potential for use as a conductive lubricant, but to achieve the optimal properties of low friction coefficient, high conductivity and oxidation resistance, the SeJNb ratio and crystallinity must be carefully controlled. It has been shown that Pulsed Laser Deposition (PLD) permits the required degree of control, even over films with complex stoichiometries. (4–8). In this study, PLD was used to grow stoichiometric, crystalline thin films of niobium diselenide and to study the effects of laser deposition parameters on film properties. Film chemistry and crystallinity were evaluated using XPS, RBS, and glancingangle XRD. Friction and wear measurements were taken on a ball-on-flat tribometer. The deposition apparatus incorporates a fully computerized data acquisition and control system that facilitated the correlation of the laser deposition parameters to film properties. This study has shown that film chemistry could be changed from substoichiometric to superstoichiometric and crystallinity varied between amorphous to highly crystalline by appropriate choice of PLD parameters. The property correlations and acquisition system that permitted the identification of the optimal growth conditions will be described.

scholarly journals RF plasma polymerised thin films from natural resources

2014 ◽  
Vol 32 ◽  
pp. 1460319 ◽  
Author(s):  
Mohan V. Jacob ◽  
Chris D. Easton ◽  
Liam J. Anderson ◽  
Kateryna Bazaka
Keyword(s):  
Thin Films ◽  
Essential Oils ◽  
Biomedical Applications ◽  
Chemical Structure ◽  
Rf Plasma ◽  
Rf Power ◽  
Film Properties ◽  
Deposition Parameters ◽  
Volatile Organic ◽  
One Step

Plasma polymerisation is an effective tool for fabrication of thin films from volatile organic monomers. RF plasma assisted deposition is used for one-step, chemical-free polymerisation of nonsynthetic materials derived directly from agricultural produces. By varying the deposition parameters, especially the input RF power, the film properties can be tailored for a range of uses, including electronics or biomedical applications. The fabricated thin films are optically transparent with refractive index close to that of glass. Given the diversity of essential oils, this paper compares the chemical and physical properties of thin films fabricated from several commercially exploited essential oils and their components. It is interesting to note that some of the properties can be tailored for various applications even though the chemical structure of the derived polymer is very similar. The obtained material properties also show that the synthesised materials are suitable as encapsulating layers for biodegradable implantable metals.

scholarly journals Thin Films/Properties and Applications

2021 ◽  
Author(s):  
Edwin Acosta
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Large Scale ◽  
Protective Coatings ◽  
Chemical Properties ◽  
Industrial Sector ◽  
Industrial Applications ◽  
Film Properties ◽  
Thin Film Technology ◽  
Deposition Parameters

Since its discovery in early times, thin films rapidly found industrial applications such as in decorative and optics purposes. With the evolution of thin film technology, supported by the development of vacuum technology and electric power facilities, the range of applications has increased at a level that nowadays almost every industrial sector make use of them to provide specific physical and chemical properties to the surface of bulk materials. The possibility to tailor the film properties through the variation of the microstructure via the deposition parameters adopted in a specific deposition technique has permitted their entrance from the simplest like protective coatings against wear and corrosion to the most technological advanced applications such as microelectronics and biomedicine, recently. In spite of such impressive progress, the connection among all steps of the thin film production, namely deposition parameters-morphology and properties, is not fully accurate. Among other reasons, the lack of characterization techniques suitable for probing films with thickness less than a single atomic layer, along with a lack of understanding of the physics have impeded the elaboration of sophisticated models for a precise prediction of film properties. Furthermore, there remain some difficulties related to the large scale production and a relative high cost for the deposition of advanced structures, i.e. quantum wells and wires. Once these barriers are overcome, thin film technology will become more competitive for advanced technological applications.

Thermoelectric properties of epitaxial and topotaxial NaxCoO2 thin films

2005 ◽  
Vol 886 ◽  
Author(s):  
Adyam Venimadhav ◽  
Z Ma ◽  
Qi Li ◽  
A Soukiassian ◽  
X. X. Xi ◽  
...  
Keyword(s):  
Thin Films ◽  
Pulsed Laser Deposition ◽  
Sapphire Substrate ◽  
Room Temperature ◽  
Pulsed Laser ◽  
Epitaxial Films ◽  
Laser Deposition ◽  
Vapor Pressures ◽  
Film Properties ◽  
Deposition Parameters

ABSTRACTWe report structural, electrical, and thermopower properties of epitaxial and topotaxial NaxCoO2 thin films on (0001) sapphire substrate. Topotaxial NaxCoO2 films were prepared by converting an epitaxial Co3O4 film to NaxCoO2 by annealing in Na vapor and epitaxial NaxCoO2 films were obtained by pulsed laser deposition. All the films are c-axis oriented. For topotaxial films, annealing in different Na vapor pressures resulted in films with different Na concentrations, which showed distinct transport properties. For directly deposited epitaxial films by pulsed laser deposition, deposition parameters are found to control the Na concentration and hence the film properties. The largest thermoelectric power of the samples made by different methods is found to be similar in the range of 70-100 μV/K at room temperature

Observations on the growth of YBa2Cu3O7-δ thin films on MgO by pulsed-laser ablation

1991 ◽  
Vol 49 ◽  
pp. 1068-1069
Author(s):  
M. Grant Norton ◽  
C. Barry Carter
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Laser Ablation ◽  
Substrate Surface ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Thin Film Deposition ◽  
Film Deposition ◽  
Laser Ablation Process ◽  
Deposition Parameters

Pulsed-laser ablation has been widely used to produce high-quality thin films of YBa2Cu3O7-δ on a range of substrate materials. The nonequilibrium nature of the process allows congruent deposition of oxides with complex stoichiometrics. In the high power density regime produced by the UV excimer lasers the ablated species includes a mixture of neutral atoms, molecules and ions. All these species play an important role in thin-film deposition. However, changes in the deposition parameters have been shown to affect the microstructure of thin YBa2Cu3O7-δ films. The formation of metastable configurations is possible because at the low substrate temperatures used, only shortrange rearrangement on the substrate surface can occur. The parameters associated directly with the laser ablation process, those determining the nature of the process, e g. thermal or nonthermal volatilization, have been classified as ‘primary parameters'. Other parameters may also affect the microstructure of the thin film. In this paper, the effects of these ‘secondary parameters' on the microstructure of YBa2Cu3O7-δ films will be discussed. Examples of 'secondary parameters' include the substrate temperature and the oxygen partial pressure during deposition.

scholarly journals Alkali-deficiency driven charged out-of-phase boundaries for giant electromechanical response

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Haijun Wu ◽  
Shoucong Ning ◽  
Moaz Waqar ◽  
Huajun Liu ◽  
Yang Zhang ◽  
...  
Keyword(s):  
Thin Films ◽  
Temperature Stability ◽  
Epitaxial Films ◽  
Polarization Rotation ◽  
Phase Boundaries ◽  
Film Properties ◽  
New Strategy ◽  
The Matrix ◽  
Opposing Effects ◽  
Severe Deterioration

AbstractTraditional strategies for improving piezoelectric properties have focused on phase boundary engineering through complex chemical alloying and phase control. Although they have been successfully employed in bulk materials, they have not been effective in thin films due to the severe deterioration in epitaxy, which is critical to film properties. Contending with the opposing effects of alloying and epitaxy in thin films has been a long-standing issue. Herein we demonstrate a new strategy in alkali niobate epitaxial films, utilizing alkali vacancies without alloying to form nanopillars enclosed with out-of-phase boundaries that can give rise to a giant electromechanical response. Both atomically resolved polarization mapping and phase field simulations show that the boundaries are strained and charged, manifesting as head-head and tail-tail polarization bound charges. Such charged boundaries produce a giant local depolarization field, which facilitates a steady polarization rotation between the matrix and nanopillars. The local elastic strain and charge manipulation at out-of-phase boundaries, demonstrated here, can be used as an effective pathway to obtain large electromechanical response with good temperature stability in similar perovskite oxides.

scholarly journals Influence of deposition parameters on the optical absorption of amorphous silicon thin films

2020 ◽  
Vol 2 (3) ◽  
Author(s):  
Lukas Terkowski ◽  
Iain W. Martin ◽  
Daniel Axmann ◽  
Malte Behrendsen ◽  
Felix Pein ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Absorption ◽  
Amorphous Silicon ◽  
Silicon Thin Films ◽  
Deposition Parameters

Processing by Pulsed Laser Deposition and Structural, Morphological and Chemical Characterization of Bi-Pb-Sr-Ca-Cu-O and Bi-Pb-Sb-Sr-Ca-Cu-O Thin Films

2010 ◽  
Vol 75 ◽  
pp. 202-207
Author(s):  
Victor Ríos ◽  
Elvia Díaz-Valdés ◽  
Jorge Ricardo Aguilar ◽  
T.G. Kryshtab ◽  
Ciro Falcony
Keyword(s):  
Thin Films ◽  
Pulsed Laser Deposition ◽  
Room Temperature ◽  
Pulsed Laser ◽  
Chemical Characterization ◽  
Laser Deposition ◽  
Nominal Composition ◽  
Deposition Parameters ◽  
The Relationship

Bi-Pb-Sr-Ca-Cu-O (BPSCCO) and Bi-Pb-Sb-Sr-Ca-Cu-O (BPSSCCO) thin films were grown on MgO single crystal substrates by pulsed laser deposition. The deposition was carried out at room temperature during 90 minutes. A Nd:YAG excimer laser ( = 355 nm) with a 2 J/pulse energy density operated at 30 Hz was used. The distance between the target and substrate was kept constant at 4,5 cm. Nominal composition of the targets was Bi1,6Pb0,4Sr2Ca2Cu3O and Bi1,6Pb0,4Sb0,1Sr2Ca2Cu3OSuperconducting targets were prepared following a state solid reaction. As-grown films were annealed at different conditions. As-grown and annealed films were characterized by XRD, FTIR, and SEM. The films were prepared applying an experimental design. The relationship among deposition parameters and their effect on the formation of superconducting Bi-system crystalline phases was studied.

Effect of aging heat time and annealing temperature on the properties of nanocrystalline tin dioxide thin films

2017 ◽  
Vol 31 (12) ◽  
pp. 1750114
Author(s):  
Imad H. Kadhim ◽  
H. Abu Hassan
Keyword(s):  
Thin Films ◽  
Tin Dioxide ◽  
Sol Gel ◽  
Stable Solution ◽  
Solution Viscosity ◽  
Pure Ethanol ◽  
Rutile Structure ◽  
Heat Time ◽  
Chloride Dihydrate ◽  
P Type

Nanocrystalline tin dioxide (SnO2) thin films have been successfully prepared by sol–gel spin-coating technique on p-type Si (100) substrates. A stable solution was prepared by mixing tin(II) chloride dihydrate, pure ethanol, and glycerin. Temperature affects the properties of SnO2 thin films, particularly the crystallite size where the crystallization of SnO2 with tetragonal rutile structure is achieved when thin films that prepared under different aging heat times are annealed at 400[Formula: see text]C. By increasing aging heat time in the presence of annealing temperatures the FESEM images indicated that the thickness of the fabricated film was directly proportional to solution viscosity, increasing from approximately 380 nm to 744 nm, as well as the crystallization of the thin films improved and reduced defects.

scholarly journals Detection of nitroaromatic vapours with diketopyrrolopyrrole thin films: exploring the role of structural order and morphology on thin film properties and fluorescence quenching efficiency

2015 ◽  
Vol 51 (6) ◽  
pp. 1143-1146 ◽  
Author(s):  
Monika Warzecha ◽  
Jesus Calvo-Castro ◽  
Alan R. Kennedy ◽  
Alisdair N. Macpherson ◽  
Kenneth Shankland ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Fluorescence Quenching ◽  
Optical Detection ◽  
Film Properties ◽  
Structural Order ◽  
Quenching Efficiency ◽  
First Time

Sensitive optical detection of nitroaromatic vapours with diketopyrrolopyrrole thin films is reported for the first time.

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