Ion Conducting Conduits with a Tortuosity of One from One Electrode to Another: The Role of Domain Connectivity and Tortuosity on Ion Conductivity in Block Copolymer Electrolyte Thin Films

2016 ◽  
Keyword(s):  
Thin Films ◽  
Block Copolymer ◽  
Ion Conductivity ◽  
Ion Conducting ◽  
Copolymer Electrolyte

Directed Assembly of Nanoparticles in Block Copolymer Thin Films: Role of Defects

2010 ◽  
Vol 43 (24) ◽  
pp. 10452-10456 ◽  
Author(s):  
Jenny Kim ◽  
Peter F. Green
Keyword(s):  
Thin Films ◽  
Block Copolymer ◽  
Directed Assembly

Dynamics of dislocations in a two-dimensional block copolymer system with hexagonal symmetry

2011 ◽  
Vol 369 (1935) ◽  
pp. 335-350 ◽  
Author(s):  
Aldo D. Pezzutti ◽  
Daniel A. Vega ◽  
Marcelo A. Villar
Keyword(s):  
Thin Films ◽  
Block Copolymer ◽  
Topological Defects ◽  
Two Dimensional ◽  
Significant Progress ◽  
Hexagonal Symmetry ◽  
Scale Selection ◽  
Long Range Ordering ◽  
Lithographic Masks

Block copolymer thin films have attracted considerable attention for their ability to self-assemble into nanometre-scale architectures. Recent advances in the use of block copolymer thin films as nano-lithographic masks have driven research efforts in order to have better control of long-range ordering in the plane of the film. Irrespective of the method of sample preparation, different quasi-two-dimensional systems with hexagonal symmetry unavoidably contain translational defects, called dislocations. Dislocations control the process of coarsening in the nano/meso-scales and provide one of the most important mechanisms of length-scale selection in hexagonal patterns. Although in the last decade the nonlinear dynamics of topological defects in quasi-two-dimensional systems has witnessed significant progress, still little is known about the role of external fields on the creation and annihilation mechanisms involved in the relaxation process towards equilibrium states. In this paper, the dynamics of dislocations in non-optimal hexagonal patterns is studied in the framework of the Ohta–Kawasaki model for a diblock copolymer. Measurements of the climb and glide velocities as a function of the wave vector deformation reveal the main mechanisms of relaxation associated with the motion of dislocations.

scholarly journals Role of Solution Structure in Self-Assembly of Conjugated Block Copolymer Thin Films

2016 ◽  
Vol 49 (21) ◽  
pp. 8187-8197 ◽  
Author(s):  
Michael A. Brady ◽  
Sung-Yu Ku ◽  
Louis A. Perez ◽  
Justin E. Cochran ◽  
Kristin Schmidt ◽  
...  
Keyword(s):  
Thin Films ◽  
Block Copolymer ◽  
Self Assembly ◽  
Solution Structure

Anisotropic Lithium Ion Conductivity in Single-Ion Diblock Copolymer Electrolyte Thin Films

2015 ◽  
Vol 37 (3) ◽  
pp. 221-226 ◽  
Author(s):  
Karim Aissou ◽  
Muhammad Mumtaz ◽  
Özlem Usluer ◽  
Gilles Pécastaings ◽  
Giuseppe Portale ◽  
...  
Keyword(s):  
Thin Films ◽  
Diblock Copolymer ◽  
Lithium Ion ◽  
Ion Conductivity ◽  
Lithium Ion Conductivity ◽  
Copolymer Electrolyte

scholarly journals The Role of Liquid Crystalline Side Chains for Long-range Ordering in the Block Copolymer Thin Films

2020 ◽  
Vol 33 (5) ◽  
pp. 529-536
Author(s):  
Lei Dong ◽  
Alvin Chandra ◽  
Kevin Wylie ◽  
Ryuichi Nakatani ◽  
Yuta Nabae ◽  
...  
Keyword(s):  
Thin Films ◽  
Block Copolymer ◽  
Long Range ◽  
Liquid Crystalline ◽  
Side Chains ◽  
Long Range Ordering

Design and synthesis of a single ion conducting block copolymer electrolyte with multifunctionality for lithium ion batteries

RSC Advances ◽  
2014 ◽  
Vol 4 (83) ◽  
pp. 43857-43864 ◽  
Author(s):  
Yunfeng Zhang ◽  
Corina Anrou Lim ◽  
Weiwei Cai ◽  
Rupesh Rohan ◽  
Guodong Xu ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Design And Synthesis ◽  
Copolymer Structure ◽  
Ion Conducting ◽  
Copolymer Electrolyte

Block copolymer structure generates pores in the single ion conducting electrolyte, which enhance performance of lithium-ion batteries.

The study of interfacial reactions of nickel thin films on GaAs

1983 ◽  
Vol 41 ◽  
pp. 156-157
Author(s):  
L.J. Chen ◽  
Y.F. Hsieh
Keyword(s):  
Thin Films ◽  
Integrated Circuits ◽  
Interfacial Reactions ◽  
Metal Contacts ◽  
Nickel Thin Films ◽  
Thin Foils ◽  
The Status ◽  
Si Doped ◽  
Electron Microscopes

One measure of the maturity of a device technology is the ease and reliability of applying contact metallurgy. Compared to metal contact of silicon, the status of GaAs metallization is still at its primitive stage. With the advent of GaAs MESFET and integrated circuits, very stringent requirements were placed on their metal contacts. During the past few years, extensive researches have been conducted in the area of Au-Ge-Ni in order to lower contact resistances and improve uniformity. In this paper, we report the results of TEM study of interfacial reactions between Ni and GaAs as part of the attempt to understand the role of nickel in Au-Ge-Ni contact of GaAs.N-type, Si-doped, (001) oriented GaAs wafers, 15 mil in thickness, were grown by gradient-freeze method. Nickel thin films, 300Å in thickness, were e-gun deposited on GaAs wafers. The samples were then annealed in dry N2 in a 3-zone diffusion furnace at temperatures 200°C - 600°C for 5-180 minutes. Thin foils for TEM examinations were prepared by chemical polishing from the GaA.s side. TEM investigations were performed with JE0L- 100B and JE0L-200CX electron microscopes.

Transmission Electron Microscopy studies of texture of Cr underlayer of magnetic recording hard disk

1991 ◽  
Vol 49 ◽  
pp. 580-581
Author(s):  
L. Tang ◽  
G. Thomas ◽  
M. R. Khan ◽  
S. L. Duan
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Transmission Electron Microscopy ◽  
Magnetic Recording ◽  
Magnetic Thin Films ◽  
Magnetic Films ◽  
Substrate Bias ◽  
Epitaxial Relationship ◽  
Transmission Electron

Cr thin films are often used as underlayers for Co alloy magnetic thin films, such as Co1, CoNi2, and CoNiCr3, for high density longitudinal magnetic recording. It is belived that the role of the Cr underlayer is to control the growth and texture of the Co alloy magnetic thin films, and, then, to increase the in plane coercivity of the films. Although many epitaxial relationship between the Cr underlayer and the magnetic films, such as ﹛1010﹜Co/ {110﹜Cr4, ﹛2110﹜Co/ ﹛001﹜Cr5, ﹛0002﹜Co/﹛110﹜Cr6, have been suggested and appear to be related to the Cr thickness, the texture of the Cr underlayer itself is still not understood very well. In this study, the texture of a 2000 Å thick Cr underlayer on Nip/Al substrate for thin films of (Co75Ni25)1-xTix dc-sputtered with - 200 V substrate bias is investigated by electron microscopy.

Transmission Electron Microscopy of Evaporated Perylene Thin Films

1990 ◽  
Vol 48 (2) ◽  
pp. 336-337
Author(s):  
C. Ewins ◽  
J.R. Fryer
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Transmission Electron Microscopy ◽  
Molecular Electronics ◽  
High Vacuum ◽  
Amorphous Layer ◽  
Electric Heater ◽  
Transmission Electron ◽  
Polycyclic Aromatic

The preparation of thin films of organic molecules is currently receiving much attention because of the need to produce good quality thin films for molecular electronics. We have produced thin films of the polycyclic aromatic, perylene C10H12 by evaporation under high vacuum onto a potassium chloride (KCl) substrate. The role of substrate temperature in determining the morphology and crystallography of the films was then investigated by transmission electron microscopy (TEM).The substrate studied was the (001) face of a freshly cleaved crystal of KCl. The temperature of the KCl was controlled by an electric heater or a cold finger. The KCl was heated to 200°C under a vacuum of 10-6 torr and allowed to cool to the desired temperature. The perylene was then evaporated over a period of one minute from a molybdenum boat at a distance of 10cm from the KCl. The perylene thin film was then backed with an amorphous layer of carbon and floated onto copper microscope grids.

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