The Instability of Polycrystalline Thin Films: Experiment and Theory

1988 ◽  
Vol 121 ◽  
Author(s):  
K. T. Miller ◽  
F. F. Lange ◽  
D. B. Marshall
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Free Energy ◽  
Grain Growth ◽  
Spin Coating ◽  
Polycrystalline Thin Film ◽  
Film Stability ◽  
Zirconium Acetate ◽  
Polycrystalline Thin Films ◽  
Thin Film Stability

ABSTRACTDense polycrystalline thin films of ZrO2 (3 and 8 mol% Y2O3) were produced by the pyrolysis of zirconium acetate precursor films, which were deposited on single crystal Al2O3 substrates by spin-coating solutions of zirconium acetate. With grain growth, these films broke into islands of ZrO2 grains. Thermodynamic calculations show that this break up lowers the free energy of the system. These calculations also predict the conditions needed for polycrystalline thin film stability.

Adsorptive Spin Coating To Study Thin-Film Stability in Both Wetting and Nonwetting Regimes

Langmuir ◽  
2019 ◽  
Vol 35 (21) ◽  
pp. 6922-6928 ◽  
Author(s):  
Yueyue Qi ◽  
Haimi Nguyen ◽  
Kelly Sin Ee Lim ◽  
Wenyun Wang ◽  
Wei Chen
Keyword(s):  
Thin Film ◽  
Spin Coating ◽  
Film Stability ◽  
Thin Film Stability

EDS, XRD and Raman Scattering Study of Dy Ion Implanted CdTe Polycrystalline Thin Films

2011 ◽  
Vol 213 ◽  
pp. 157-160
Author(s):  
Juan Hou ◽  
Hai Bin Cao ◽  
Xu Chu Huang ◽  
Chun Yan Song
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Raman Scattering ◽  
X Ray Diffraction ◽  
Polycrystalline Thin Film ◽  
X Ray ◽  
Polycrystalline Thin Films ◽  
Lattice Damage ◽  
Scattering Study ◽  
Ion Implanted

Dysprosium (Dy) ion implanted CdTe polycrystalline thin film (PTF) deposited on the ceramic substrate by the close spaced sublimation （CSS) method. Both the energy dispersive X-ray spectrometer（EDS）and Raman scattering analysis show that the as-deposited and Dy ion implanted CdTe PTF are non-stoichiometric with excess telluride. Furthermore, X-ray diffraction study reveals that the CdTe PTF forms a zinc-blended structure. In the Raman scattering analysis, the position of the peak on implantation does not change apparently whereas the intensity of the peak decreases owing to the lattice damage and increases as a result of thermal annealing. The data support that Raman activity is enhanced after Dy ion implantation.

scholarly journals Lung surfactants and different contributions to thin film stability

Soft Matter ◽  
2015 ◽  
Vol 11 (41) ◽  
pp. 8048-8057 ◽  
Author(s):  
Eline Hermans ◽  
M. Saad Bhamla ◽  
Peter Kao ◽  
Gerald G. Fuller ◽  
Jan Vermant
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Lung Surfactant ◽  
Lung Surfactants ◽  
Film Stability ◽  
Hemispherical Dome ◽  
Drainage Flows ◽  
Thin Film Stability ◽  
The Stability

In the present work, we investigate the mechanisms affecting the stability of surfactant-laden thin films during spreading, using drainage flows from a hemispherical dome. Three commercial lung surfactant replacements Survanta, Curosurf and Infasurf, along with the phospholipid dipalmitoylphosphatidylcholine (DPPC), are used.

The instability of polycrystalline thin films: Experiment and theory

1990 ◽  
Vol 5 (1) ◽  
pp. 151-160 ◽  
Author(s):  
K. T. Miller ◽  
F. F. Lange ◽  
D. B. Marshall
Keyword(s):  
Thin Films ◽  
Grain Size ◽  
Film Thickness ◽  
Grain Growth ◽  
Spherical Surface ◽  
Polycrystalline Film ◽  
Yttrium Nitrate ◽  
Zirconium Acetate ◽  
Polycrystalline Thin Films ◽  
Average Grain Size

Dense polycrystalline thin films of ZrO2 (3 and 8 mol % Y2O3) were produced by the pyrolysis of zirconium acetate precursor films, which were deposited on single crystal Al2O3 substrates by spin-coating aqueous solutions of zirconium acetate and yttrium nitrate. Dense films were heat treated to encourage grain growth. With grain growth, these films broke into islands of ZrO2 grains. Identical areas were examined after each heat treatment to determine the mechanism that causes the polycrystalline film to uncover the substrate. Two mechanisms were detailed: (a) for a composition which inhibited grain growth and produced a polycrystalline film with very small grains, the smallest grains would disappear to uncover the substrate, and (b) for a composition which did not inhibit grain boundary motion, larger grains grew by enveloping a smaller grain and then developed more spherical surface morphologies, uncovering the substrate at three grain junctions. In both cases, the breakup phenomenon occurred when the average grain size was larger than the film thickness. Thermodynamic calculations show that this breakup lowers the free energy of the system when the grain-size-to-film-thickness ratio exceeds a critical value. These calculations also predict the conditions needed for polycrystalline thin film stability.

Epitaxial Grain Growth and Orientation Metastability in Heteroepitaxial Thin Films

1990 ◽  
Vol 187 ◽  
Author(s):  
J. A. Floro ◽  
C. V. Thompson
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Free Energy ◽  
Free Surface ◽  
Grain Growth ◽  
Film Growth ◽  
Metal Films ◽  
Thin Film Growth ◽  
Film Substrate ◽  
Epitaxial Grain Growth

AbstractConventional heteroepitaxial thin film growth may result in a film whose epitaxial orientation is metastable. One method of probing the relative energies of various film orientations is epitaxial grain growth. Epitaxial grain growth selects the orientation having lowest total free energy, including the free energy of both the film-substrate interface and the free surface of the film. Experimental examples of epitaxial grain growth in metal films on insulating substrates will be discussed.

Photoconductivity of Nanocomposite MEH-PPV: TiO2 Thin Films

2011 ◽  
Vol 13 ◽  
pp. 87-92 ◽  
Author(s):  
M.S.P Sarah ◽  
F.S. Zahid ◽  
M.Z. Musa ◽  
U.M. Noor ◽  
Z. Shaameri ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Surface Morphology ◽  
Spin Coating ◽  
Glass Substrate ◽  
Spin Coating Technique ◽  
Coating Technique ◽  
Current Voltage ◽  
Current Voltage Characteristics

The photoconductivity of a nanocomposite MEH-PPV:TiO2 thin film is investigated. The nanocomposite MEH-PPV:TiO2 thin film was deposited on a glass substrate by spin coating technique. The composition of the TiO2 powder was varied from 5 wt% to 20 wt% (with 5 wt% interval). The concentration of the MEH-PPV is given by 1 mg/1 ml. The current voltage characteristics were measured in dark and under illumination. The photoconductivity showed increment in value as the composition of the TiO2 is raised in the polymer based solution. The absorption showed augmentation as the amount of TiO2 is increased. The escalation of the current voltage is then supported by the results of surface morphology.

scholarly journals Preparation of Glass Plate-Supported Nanostructure ZnO Thin Film Deposited by Sol-Gel Spin-Coating Technique and Its Photocatalytic Degradation to Monoazo Textile Dye

2008 ◽  
Vol 2008 ◽  
pp. 1-5 ◽  
Author(s):  
Mohammad Hossein Habibi ◽  
Mohammad Khaledi Sardashti
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Photocatalytic Degradation ◽  
Spin Coating ◽  
Sol Gel ◽  
Glass Plate ◽  
Zno Thin Films ◽  
Visible Range ◽  
Textile Dye ◽  
Axis Orientation

Glass plate-supported nanostructure ZnO thin films were deposited by sol-gel spin coating. Films were preheated at275∘Cfor 10 minutes and annealed at 350, 450, and550∘Cfor 80 minutes. The ZnO thin films were transparent ca 80–90% in visible range and revealed that absorption edges at about 370 nm. Thec-axis orientation improves and the grain size increases which was indicated by an increase in intensity of the (002) peak at34.4∘in XRD corresponding to the hexagonal ZnO crystal. The photocatalytic degradation of X6G an anionic monoazo dye, in aqueous solutions, was investigated and the effects of some operational parameters such as the number of layer and reusability of ZnO nanostructure thin film were examined. The results showed that the five-layer coated glass surfaces have a very high photocatalytic performance.

A Novel Ethanol-Based Non-Particulate Ink for Spin-Coating Cu2ZnSnS4 Thin Film

2021 ◽  
Vol 16 (2) ◽  
pp. 136-141
Author(s):  
Jingyuan Zhang ◽  
Yusheng Liu ◽  
Jianing Song ◽  
Mu Zhang ◽  
Xiaodong Li
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Electrical Properties ◽  
Spin Coating ◽  
Treatment Temperature ◽  
Coated Film ◽  
Coating Method ◽  
Pre Treatment ◽  
Cu2znsns4 Thin Film ◽  
Czts Thin Films

The Cu2ZnSnS4 (CZTS) thin films were fabricated by the direct solution coating method using a novel non-particulate ink. The ink was formulated using ethanol as the solvent and 1,2-diaminopropane as the complex-ing agent. The pure phase kesterite films with good crystallinity, large-sized crystals and excellent electrical properties were prepared by the spin-coating deposition technique using the homogeneous and air-stable ink. It was found that the subsequent pre-treatment temperature had an influence on the film crystallinity and electrical properties. The best film was obtained by pre-treating the spin-coated film at 250 °C, and then post-annealing at 560 °C. The film shows a narrow bandgap of 1.52 eV and excellent electrical properties, with a resistivity of 0.07 Ocm, carrier concentration of 3.0 x 1017 cm-3, and mobility of 4.15 cm2 V-1 s-1. The novel non-particulate ink is promising for printing high quality CZTS thin films as absorber layers of thin film solar cells.

Synthesis and Characterizations of Strontium Substituted Hydroxyapatite Thin Films

2010 ◽  
Vol 93-94 ◽  
pp. 231-234
Author(s):  
B. Hongthong ◽  
Satreerat K. Hodak ◽  
Sukkaneste Tungasmita
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Chemical Composition ◽  
Spin Coating ◽  
Phase Structure ◽  
Sol Gel ◽  
Cross Linking ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sol Gel Process

Strontium substituted hydroxyapatite(SrHAp) were fabricated both in the form of powder as reference and thin film by using inorganic precursor reaction. The sol-gel process has been used for the deposition of SrHAp layer on stainless steal 316L substrate by spin coating technique, after that the films were annealed in air at various temperatures. The chemical composition of SrHAp is represented (SrxCa1-x)5(PO4)3OH, where x is equal to 0, 0.5 and 1.0. Investigations of the phase structure of SrHAp were carried out by using X-ray diffraction technique (XRD). The results showed that strontium is incorporated into hydroxyapatite where its substitution for calcium increases in the lattice parameters, and Sr3(PO4)2 can be detected at 900°C. The SEM micrographs showed that SrHAp films exhibited porous structure before develop to a cross-linking structure.

Solution-processed ternary p-type CuCrO2 semiconductor thin films and their application in transistors

2018 ◽  
Vol 6 (6) ◽  
pp. 1393-1398 ◽  
Author(s):  
Shengbin Nie ◽  
Ao Liu ◽  
You Meng ◽  
Byoungchul Shin ◽  
Guoxia Liu ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Spin Coating ◽  
Thin Film Transistors ◽  
Solution Processed ◽  
Semiconductor Thin Films ◽  
P Type

In this study, transparent p-type CuCrxOy semiconductor thin films were fabricated using spin coating and integrated as channel layers in thin-film transistors (TFTs).

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