Effect of Solvent Flow on a Polymer Brush:  A Neutron Reflectivity Study of the Brush Height and Chain Density Profile

Langmuir ◽  
2001 ◽  
Vol 17 (10) ◽  
pp. 2999-3005 ◽  
Author(s):  
R. Ivkov ◽  
P. D. Butler ◽  
S. K. Satija ◽  
L. J. Fetters
Keyword(s):  
Density Profile ◽  
Polymer Brush ◽  
Neutron Reflectivity ◽  
Effect Of Solvent ◽  
Brush Height ◽  
Solvent Flow

Neutron Reflectivity Study of the Density Profile of a Model End-Grafted Polymer Brush: Influence of Solvent Quality

1994 ◽  
Vol 73 (25) ◽  
pp. 3407-3410 ◽  
Author(s):  
A. Karim ◽  
S. K. Satija ◽  
J. F. Douglas ◽  
J. F. Ankner ◽  
L. J. Fetters
Keyword(s):  
Density Profile ◽  
Polymer Brush ◽  
Neutron Reflectivity ◽  
Grafted Polymer ◽  
Solvent Quality ◽  
Influence Of Solvent

Effect of Solvent Flow Rates on Controllability of Extractive Distillation for Separating Binary Azeotropic Mixture

2015 ◽  
Vol 54 (51) ◽  
pp. 12908-12919 ◽  
Author(s):  
Yinglong Wang ◽  
Shisheng Liang ◽  
Guangle Bu ◽  
Wei Liu ◽  
Zhen Zhang ◽  
...  
Keyword(s):  
Extractive Distillation ◽  
Azeotropic Mixture ◽  
Flow Rates ◽  
Effect Of Solvent ◽  
Solvent Flow

Interfacial Segment Density Profile of Adsorbed β-Casein from Neutron Reflectivity Measurements

2005 ◽  
pp. 396-401
Author(s):  
Eric Dickinson ◽  
David S. Horne ◽  
J.S. Phipps ◽  
R.M. Richardson
Keyword(s):  
Density Profile ◽  
Neutron Reflectivity

Determining the density profile of confined polymer brushes with neutron reflectivity

2004 ◽  
Vol 42 (17) ◽  
pp. 3290-3301 ◽  
Author(s):  
W. A. Hamilton ◽  
G. S. Smith ◽  
N. A. Alcantar ◽  
J. Majewski ◽  
R. G. Toomey ◽  
...  
Keyword(s):  
Density Profile ◽  
Polymer Brushes ◽  
Neutron Reflectivity ◽  
Confined Polymer

Stratification in Monolayers of a Bidisperse Melt Polymer Brush As Revealed by Neutron Reflectivity

1999 ◽  
Vol 32 (22) ◽  
pp. 7599-7609 ◽  
Author(s):  
Werner A. Goedel ◽  
Clarisse Luap ◽  
Ralf Oeser ◽  
Peter Lang ◽  
Christian Braun ◽  
...  
Keyword(s):  
Polymer Brush ◽  
Neutron Reflectivity

Applications of Neutron Reflectivity Measurements to Nanoscience: Thin Films and Interfaces

MRS Bulletin ◽  
2003 ◽  
Vol 28 (12) ◽  
pp. 918-922 ◽  
Author(s):  
John F. Ankner ◽  
Hartmut Zabel
Keyword(s):  
Thin Films ◽  
Density Profile ◽  
Materials Science ◽  
Kinetic Studies ◽  
Film Plane ◽  
Small Sample ◽  
Neutron Reflectivity ◽  
Nuclear Density ◽  
Essential Difference ◽  
Reflectivity Data

AbstractNeutron reflectivity has matured in recent years from an exotic method used only by a few experts to an essential tool for the investigation of thin films and interfaces on the nanoscale. In contrast to x-ray reflectivity, which provides electron density profiles, neutron reflectivity reveals the nuclear density profile. This is an essential difference when exploring hydrogenous materials such as polymers, Langmuir–Blodgett films, and membranes. Furthermore, neutrons carry a magnetic moment that interacts with the magnetic induction of the film, revealing, in addition to the nuclear density profile, the magnetic density profile in layers and superlattices. Recent developments in the analysis of off-specular neutron reflectivity data enable the characterization of chemical and magnetic correlations within the film plane on nanometer to micron length scales. A new generation of pulsed neutron sources, featuring flux enhancements of factors of 10–100 over existing sources, will make these types of measurements even more exciting, while kinetic studies, pump-probe, and small-sample experiments will become feasible, opening new windows onto nanoscale materials science.

Temperature Dependence of the Morphology of Thin Diblock Copolymer Films as Revealed by Neutron Reflectivity

1989 ◽  
Vol 166 ◽  
Author(s):  
T. P. Russell ◽  
S. H. Anastasiadis ◽  
S. K. Satija ◽  
C. F. Majkrzak
Keyword(s):  
Thin Films ◽  
Temperature Dependence ◽  
Density Profile ◽  
Diblock Copolymer ◽  
Diblock Copolymers ◽  
Decay Length ◽  
Neutron Reflectivity ◽  
Copolymer Films ◽  
Lamellar Morphology ◽  
Oriented Parallel

ABSTRACTThe order-disorder transition in thin films of symmetric diblock copolymers of polystyrene and polymethylmethacrylate has been investigated by neutron reflectivity. At temperatures above the order-disorder temperature, TMST, a surface induced oscillatory segment density profile with an exponential decay length, χ, is observed. The inverse of decay length 1/≤ TMST a lamellar morphology oriented parallel to the surface propagates through the entire specimen.

Sign in / Sign up

Export Citation Format

Share Document