Annealing effects on the surface morphologies of thin PS/PMMA blend films with different film thickness

2004 ◽  
Vol 230 (1-4) ◽  
pp. 115-124 ◽  
Author(s):  
Xue Li ◽  
Yanchun Han ◽  
Lijia An
Keyword(s):  
Film Thickness ◽  
Blend Films ◽  
Annealing Effects ◽  
Surface Morphologies

Properties of poly(lactic acid-co-glycolic acid) film modified by blending with polyurethane

2014 ◽  
Vol 68 (2) ◽  
Author(s):  
Guo-Quan Zhu ◽  
Fa-Gang Wang ◽  
Hong-Sheng Tan ◽  
Qiao-Chun Gao ◽  
Yu-Ying Liu
Keyword(s):  
Lactic Acid ◽  
Glycolic Acid ◽  
Chemical Properties ◽  
Tensile Tests ◽  
Poly Lactic Acid ◽  
Scanning Calorimetry ◽  
Blend Films ◽  
Surface Contact Angle ◽  
Surface Morphologies ◽  
And Chemical Properties

AbstractA number of poly(lactic acid-co-glycolic acid)/polyurethane (PLGA/PU) blend films with various PU mole contents were prepared by casting the polymer blend solution in chloroform. The surface morphologies of the PLGA/PU blend films were studied by scanning electron microscopy (SEM). The thermal, mechanical and chemical properties of the PLGA/PU blend films were investigated by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), tensile tests and surface contact angle tests. The results revealed that the introduction of PU could markedly modify the properties of PLGA films.

Film Thickness and Composition Effects in Symmetric Ternary Block Copolymer/Homopolymer Blend Films: Domain Spacing and Orientation

2021 ◽  
Vol 54 (17) ◽  
pp. 7970-7986
Author(s):  
Kristof Toth ◽  
Suwon Bae ◽  
Chinedum O. Osuji ◽  
Kevin G. Yager ◽  
Gregory S. Doerk
Keyword(s):  
Block Copolymer ◽  
Film Thickness ◽  
Blend Films ◽  
Composition Effects

Suppression of Ferromagnetic Ordering in thicker co-sputtered Mn doped MgO Films

2013 ◽  
Vol 1552 ◽  
pp. 83-88 ◽  
Author(s):  
Sreekanth K. Mahadeva ◽  
Zhi-Yong Quan ◽  
J. C. Fan ◽  
K. S. Sreelatha ◽  
L. Belova ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Film Thickness ◽  
Saturation Magnetization ◽  
Room Temperature ◽  
Structural Surface ◽  
Ferromagnetic Ordering ◽  
Surface Morphologies ◽  
Mn Doped ◽  
Different Thickness

ABSTRACTWe report on preliminary studies of low (14 at.%) and high (53at.%) concentration Mn doped MgO films deposited by co-sputtering from metallic Mn and Mg targets. The structural, surface morphologies and magnetic properties of the films of different thickness were studied. All the as grown films are found to be amorphous and film surfaces are found to be flawless and homogeneous. We observe at room temperature robust ferromagnetic loops with a saturation magnetization value that is a function of film thickness reaching a maximum of ∼38.5 emu/cm3 in the Mn0.53Mg0.47O film at a thickness of ∼92 nm. In thicker films room-temperature ferromagnetic ordering is suppressed and eventually at a thickness around 120nm the expected diamagnetism of the bulk appears. The origin of ferromagnetism may be attributed to cation defects at the Mg-site.

Deposition and Characterization of MgO Thin Films on SrTiO3 and LaAlO3 Substrates

1992 ◽  
Vol 280 ◽  
Author(s):  
Bertha P. Chang ◽  
Neville Sonnenberg ◽  
Michael J. Cima
Keyword(s):  
Thin Films ◽  
Film Thickness ◽  
Grazing Incidence ◽  
Rf Magnetron Sputtering ◽  
Electron Beam Evaporation ◽  
Substrate Material ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
Surface Morphologies

ABSTRACTMgO thin films have been deposited on SrTiO3 and LaA1O3 substrates using both off-axis rf magnetron sputtering and electron beam evaporation techniques. The effects of substrate material, temperature, film thickness, deposition rate, sputtering gas, and pressure on the quality of the MgO films produced have been studied. Films deposited on (100) SrTiO3 at temperatures > 300°C display only the (h00) reflections in their X-ray diffraction traces, with narrow X-ray rocking curve measurements indicating that these films are epitaxial. Epitaxy has been confirmed with grazing incidence diffraction. MgO films deposited on (100) LaAlO3 are crystalline, but have varying orientations depending on the film thickness. From scanning electron microscopy, MgO films on SrTiO3 substrates appear smooth and dense while those deposited on LaAlO3 substrates possess rougher surfaces. Surface morphologies have been analyzed using atomic force microscopy.

Evaluation of TiO2 Films Fabricated by Aerosol Deposition

2013 ◽  
Vol 566 ◽  
pp. 195-198 ◽  
Author(s):  
Kazuo Yuuki ◽  
Yuta Uemichi ◽  
Yuuki Sato ◽  
Shinzo Yoshikado
Keyword(s):  
Film Thickness ◽  
Gas Flow ◽  
Room Temperature ◽  
Aerosol Deposition ◽  
Carrier Gas ◽  
Scan Time ◽  
High Carrier ◽  
Temperature Impact ◽  
Surface Morphologies ◽  
Carrier Gas Flow

Films of titanium dioxide (TiO2) were deposited by aerosol deposition at room temperature. Anatase TiO2 powders were used. The crystal structure of these films was a mixture of the anatase and brookite TiO2 phases, while the rutile TiO2 phase was observed at high carrier gas flow rates. The TiO2 film thickness increased in proportion with the scan time and the carrier gas flow rate. Film thickness was constant at constant total deposition times. Flake-like and mesh-like surface morphologies were observed on the films. The direct-current resistivity was estimated from the dielectric constant and the loss tangent; it was found to be much smaller than that of bulk TiO2. We speculate that this low resistivity is due to reduction of TiO2 particles during room-temperature impact consolidation in a N2 atmosphere.

Influence of Film Thickness on the Phase Separation Mechanism in Ultrathin Conducting Polymer Blend Films

2011 ◽  
Vol 115 (12) ◽  
pp. 2899-2909 ◽  
Author(s):  
Robert Meier ◽  
Matthias A. Ruderer ◽  
Alexander Diethert ◽  
Gunar Kaune ◽  
Volker Körstgens ◽  
...  
Keyword(s):  
Phase Separation ◽  
Film Thickness ◽  
Conducting Polymer ◽  
Polymer Blend ◽  
Separation Mechanism ◽  
Blend Films ◽  
Phase Separation Mechanism

scholarly journals Tailoring the nanoscale morphology of HKUST-1 thin films via codeposition and seeded growth

2017 ◽  
Vol 8 ◽  
pp. 2307-2314 ◽  
Author(s):  
Landon J Brower ◽  
Lauren K Gentry ◽  
Amanda L Napier ◽  
Mary E Anderson
Keyword(s):  
Film Thickness ◽  
Film Formation ◽  
Full Range ◽  
Deposition Process ◽  
Film Structure ◽  
Layer By Layer ◽  
Seeded Growth ◽  
Seed Crystals ◽  
Control Film ◽  
Surface Morphologies

Integration of surface-anchored metal-organic frameworks (surMOFs) within hierarchical architectures is necessary for potential sensing, electronic, optical, or separation applications. It is important to understand the fundamentals of film formation for these surMOFs in order to develop strategies for their incorporation with nanoscale control over lateral and vertical dimensions. This research identified processing parameters to control the film morphology for surMOFs of HKUST-1 fabricated by codeposition and seeded deposition. Time and temperature were investigated to observe film formation, to control film thickness, and to tune morphology. Film thickness was investigated by ellipsometry, while film structure and film roughness were characterized by atomic force microscopy. Films formed via codeposition resulted in nanocrystallites anchored to the gold substrate. A dynamic process at the interface was observed with a low density of large particulates (above 100 nm) initially forming on the substrate; and over time these particulates were slowly replaced by the prevalence of smaller crystallites (ca. 10 nm) covering the substrate at a high density. Elevated temperature was found to expedite the growth process to obtain the full range of surface morphologies with reasonable processing times. Seed crystals formed by the codeposition method were stable and nucleated growth throughout a subsequent layer-by-layer deposition process. These seed crystals templated the final film structure and tailor the features in lateral and vertical directions. Using codeposition and seeded growth, different surface morphologies with controllable nanoscale dimensions can be designed and fabricated for integration of MOF systems directly into device architectures and sensor platforms.

Effect of Film Thickness on Morphological Evolution in Dewetting and Crystallization of Polystyrene/Poly(ε-caprolactone) Blend Films

Langmuir ◽  
2011 ◽  
Vol 27 (21) ◽  
pp. 13072-13081 ◽  
Author(s):  
Meng Ma ◽  
Zhoukun He ◽  
Jinghui Yang ◽  
Feng Chen ◽  
Ke Wang ◽  
...  
Keyword(s):  
Film Thickness ◽  
Morphological Evolution ◽  
Blend Films
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