Impact of the process conditions on polymer pattern morphology during spin coating over topological surfaces

Three conjugated D–A copolymers were found to form well-defined nanopillar arrays through a facile spin-casting process when blended with fullerene derivatives.

Download Full-text

Bias Stress Stability of Solution-Processed Nano Indium Oxide Thin Film Transistor

Micromachines ◽

10.3390/mi12020111 ◽

2021 ◽

Vol 12 (2) ◽

pp. 111

Author(s):

Rihui Yao ◽

Xiao Fu ◽

Wanwan Li ◽

Shangxiong Zhou ◽

Honglong Ning ◽

...

Keyword(s):

Thin Film ◽

Indium Oxide ◽

Spin Coating ◽

Glass Substrate ◽

Annealing Temperature ◽

Oxide Thin Film ◽

Process Conditions ◽

Hydroxyl Groups ◽

Band Theory ◽

Indium Oxide Thin Film

In this paper, the effects of annealing temperature and other process parameters on spin-coated indium oxide thin film transistors (In2O3-TFTs) were studied. The research shows that plasma pretreatment of glass substrate can improve the hydrophilicity of glass substrate and stability of the spin-coating process. With Fourier transform infrared (FT-IR) and X-ray diffraction (XRD) analysis, it is found that In2O3 thin films prepared by the spin coating method are amorphous, and have little organic residue when the annealing temperature ranges from 200 to 300 °C. After optimizing process conditions with the spin-coated rotating speed of 4000 rpm and the annealing temperature of 275 °C, the performance of In2O3-TFTs is best (average mobility of 1.288 cm2·V−1·s−1, Ion/Ioff of 5.93 × 106, and SS of 0.84 V·dec−1). Finally, the stability of In2O3-TFTs prepared at different annealing temperatures was analyzed by energy band theory, and we identified that the elimination of residual hydroxyl groups was the key influencing factor. Our results provide a useful reference for high-performance metal oxide semiconductor TFTs prepared by the solution method.

Download Full-text

Preparation of Macroprous C12A7 Mayenite Monoliths via a Sol-Gel Process with Nitrates as Precursors

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.768.211 ◽

2018 ◽

Vol 768 ◽

pp. 211-217 ◽

Cited By ~ 1

Author(s):

Rui Wang ◽

Yu Kun Sun ◽

Bao Jia Qi Jiang ◽

Hui Yang ◽

Xing Zhong Guo

Keyword(s):

Heat Treatment ◽

Phase Separation ◽

Binary System ◽

Propylene Oxide ◽

Crystalline Phase ◽

Sol Gel ◽

Single Crystalline ◽

Sol Gel Process

Macroporous Ca12Al14O33(C12A7) mayenite monoliths have been successfully prepared via a sol-gel process in the presence of propylene oxide (PO) and poly (ethyleneoxide) (PEO). Gelation of CaO-Al2O3binary system with nitrates salts as additional precursors is accelerated by PO as an acid scavenger, while PEO works as a phase separation inducer to mediate the phase separation of the system. Appropriate PO and PEO amounts allow the formation of monolithic xerogel with interconnected macropores and co-continuous skeletons. The resultant dried gels are amorphous and the single crystalline phase Ca12Al14O33mayenite forms after heat-treatment at 1100 °C in air, while the macrostructure is preserved with a porosity as high as 78% and smoother and denser skeletons.

Download Full-text

Polymer Phase Separation

Scaffolding In Tissue Engineering ◽

10.1201/9781420027563.ch9 ◽

2005 ◽

pp. 125-137

Author(s):

Peter Ma ◽

Victor Chen

Keyword(s):

Phase Separation ◽

Polymer Phase

Download Full-text

Controlling Polymersome Surface Topology at the Nanoscale by Membrane Confined Polymer/Polymer Phase Separation

ACS Nano ◽

10.1021/nn102455z ◽

2011 ◽

Vol 5 (3) ◽

pp. 1775-1784 ◽

Cited By ~ 123

Author(s):

Caterina LoPresti ◽

Marzia Massignani ◽

Christine Fernyhough ◽

Adam Blanazs ◽

Anthony J. Ryan ◽

...

Keyword(s):

Phase Separation ◽

Surface Topology ◽

Polymer Phase ◽

Confined Polymer

Download Full-text

Modeling of Liquid-Liquid Demixing Curve in Lead-Zinc Binary System

Diffusion Foundations ◽

10.4028/www.scientific.net/df.18.49 ◽

2018 ◽

Vol 18 ◽

pp. 49-54

Author(s):

Naceur Amel ◽

Adjadj Fouzia

Keyword(s):

Mathematical Model ◽

Free Energy ◽

Phase Separation ◽

Binary System ◽

Free Energies ◽

Common Tangent ◽

Different Temperatures ◽

Lead Zinc ◽

The Common ◽

Zn Alloys

In this work we discussed the modeling of the demixing curve in the liquid state in the Lead – Zinc binary system. We are interested to recalculate the free energies relating on Pb-Zn alloys for several temperatures based on the thermodynamic data collected in the bibliography. This calculation allows us to trace the curve of phase separation from a program after obtaining the mole fractions corresponding to the common tangent to the curve of the free energy with two minima at different temperatures. To do this, we used the Matlab 7.1 as the programming language and the Redlich-Kister polynomial as a mathematical model of development. The results obtained are very satisfactory by comparing them with those of the bibliography.

Download Full-text