scholarly journals Structuring of colloidal silica nanoparticle suspensions near water–silica interfaces probed by specular neutron reflectivity

2020 ◽  
Vol 22 (11) ◽  
pp. 6449-6456 ◽  
Author(s):  
Plinio Maroni ◽  
Manuchar Gvaramia ◽  
Dominik Kosior ◽  
Katarzyna Kubiak ◽  
Liam Scarratt ◽  
...  
Keyword(s):  
Concentration Profile ◽  
Colloidal Silica ◽  
Silica Nanoparticle ◽  
Neutron Reflectivity ◽  
Charged Interface ◽  
Free Region ◽  
Nanoparticle Suspensions ◽  
Charged Nanoparticles

Suspensions of charged nanoparticles near an isolated like-charged interface show a particle-free region, which is followed by a damped, oscillatory concentration profile.

Surface Enrichment and Evaporation in a Polymer Mixture of Long and Short Chains

1989 ◽  
Vol 166 ◽  
Author(s):  
Russell J. Composto ◽  
Richard S. Stein ◽  
Gian P. Felcher ◽  
Abdelkader Mansour ◽  
Alamgir Karim
Keyword(s):  
Molecular Weight ◽  
Film Thickness ◽  
Concentration Profile ◽  
Scattering Length ◽  
Weight Fraction ◽  
Polymer Mixture ◽  
Light Chains ◽  
Neutron Reflectivity ◽  
Surface Enrichment ◽  
Polymer Interface

ABSTRACTNeutron reflectivity has been used to determine the concentration profile at the vacuum-polymer interface for a two polymer blend. To quantify surface enrichment and evaporation due to differences in chain length, we have measured the reflectivity of a mixture of short deuterated and long protonated polystyrene chains (DPS & PS), with a weight fraction of 0.5. When a mixture of DPS and PS chains of molecular weight 720 and 910k respectively were annealed, a small but measurable increase in asymptotic reflectivity occured, coupled with a decrease of film thickness and scattering length density. This is indicative of surface enrichment and evaporation of the light chains (DPS). Ellipsometry studies confirmed that the short chains evaporated and its rate was established as a function of the temperature. Upon increasing the DPS molecular weight to 9600, the enrichment becomes considerably greater whilst the evaporation becomes negligible.

Experimental evaluation of additional short ranged repulsion in structural oscillation forces

Soft Matter ◽  
2018 ◽  
Vol 14 (26) ◽  
pp. 5383-5392 ◽  
Author(s):  
Sebastian Schön ◽  
Regine von Klitzing
Keyword(s):  
Ionic Strength ◽  
Double Layer ◽  
Experimental Evaluation ◽  
Silica Nanoparticle ◽  
Nanoparticle Suspensions ◽  
Low Ionic Strength ◽  
Aqueous Silica

Identification of positive synergy at low ionic strength between structural oscillation and double layer forces in confined aqueous silica nanoparticle suspensions.

Binary Colloidal Crystal Films Grown by Vertical Evaporation of Silica Nanoparticle Suspensions

Langmuir ◽  
2017 ◽  
Vol 33 (39) ◽  
pp. 10366-10373 ◽  
Author(s):  
Jennifer L. Russell ◽  
Grace H. Noel ◽  
Joseph M. Warren ◽  
Ngoc-Lan L. Tran ◽  
Thomas E. Mallouk
Keyword(s):  
Colloidal Crystal ◽  
Silica Nanoparticle ◽  
Nanoparticle Suspensions ◽  
Crystal Films

Colloidal silica nanoparticle-assisted structural control of cellulose nanofiber paper separators for lithium-ion batteries

2013 ◽  
Vol 242 ◽  
pp. 533-540 ◽  
Author(s):  
Jeong-Hoon Kim ◽  
Jung-Hwan Kim ◽  
Eun-Sun Choi ◽  
Hyung Kyun Yu ◽  
Jong Hun Kim ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Structural Control ◽  
Colloidal Silica ◽  
Lithium Ion ◽  
Silica Nanoparticle ◽  
Cellulose Nanofiber

Effect of acid and temperature on the discontinuous shear thickening phenomenon of silica nanoparticle suspensions

2016 ◽  
Vol 658 ◽  
pp. 210-214 ◽  
Author(s):  
Shuangbing Li ◽  
Jixiao Wang ◽  
Wei Cai ◽  
Song Zhao ◽  
Zhi Wang ◽  
...  
Keyword(s):  
Shear Thickening ◽  
Silica Nanoparticle ◽  
Nanoparticle Suspensions

A dielectric study on colloidal silica nanoparticle Layer-by-Layer assemblies on polycarbonate

2013 ◽  
Vol 408 ◽  
pp. 252-255 ◽  
Author(s):  
Federico Carosio ◽  
Laurent Banet ◽  
Nicola Freebody ◽  
Martin Reading ◽  
Serge Agnel ◽  
...  
Keyword(s):  
Colloidal Silica ◽  
Silica Nanoparticle ◽  
Dielectric Study ◽  
Layer By Layer ◽  
Nanoparticle Layer

scholarly journals Flow and fracture near the sol–gel transition of silica nanoparticle suspensions

Soft Matter ◽  
2018 ◽  
Vol 14 (39) ◽  
pp. 8036-8043 ◽  
Author(s):  
Gustavo E. Gimenes ◽  
Elisabeth Bouchaud
Keyword(s):  
Tensile Stress ◽  
Mechanical Response ◽  
Sol Gel ◽  
Silica Nanoparticle ◽  
Nanoparticle Suspensions ◽  
Sol Gel Transition ◽  
Gel Transition

Mechanical response to tensile stress, from flow to fracture, as a function of the distance from the sol–gel transition.

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