Electric Response of Nonspherical and Spherical Silica Particle Dispersions to Ac Electric Field

Langmuir ◽  
2010 ◽  
Vol 26 (12) ◽  
pp. 10357-10364 ◽  
Author(s):  
Satoshi Nishimura ◽  
Hideo Matsumura ◽  
Katsunori Kosuge ◽  
Tomohiko Yamaguchi
Keyword(s):  
Electric Field ◽  
Silica Particle ◽  
Electric Response ◽  
Ac Electric Field ◽  
Spherical Silica ◽  
Spherical Silica Particle

scholarly journals Spherical silica particle production by combined biomimetic-Stöber synthesis using renewable sodium caseinate without petrochemical agents

2021 ◽  
Vol 11 (4) ◽  
pp. 1151-1167
Author(s):  
Ricky Curley ◽  
Russell A. Banta ◽  
Shane Garvey ◽  
Justin D. Holmes ◽  
Eoin J. Flynn
Keyword(s):  
Silica Particle ◽  
Particle Production ◽  
Sodium Caseinate ◽  
Spherical Silica ◽  
Spherical Silica Particle

Fracture toughness of nano- and micro-spherical silica-particle-filled epoxy composites

2008 ◽  
Vol 56 (9) ◽  
pp. 2101-2109 ◽  
Author(s):  
Tadaharu Adachi ◽  
Mayuka Osaki ◽  
Wakako Araki ◽  
Soon-Chul Kwon
Keyword(s):  
Fracture Toughness ◽  
Silica Particle ◽  
Epoxy Composites ◽  
Spherical Silica ◽  
Spherical Silica Particle

Tuning the Electric Field Response of MOFs by Rotatable Dipolar Linkers

2019 ◽  
Author(s):  
Johannes P. Dürholt ◽  
Babak Farhadi Jahromi ◽  
Rochus Schmid
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Structural Changes ◽  
Dielectric Behavior ◽  
Two Dimensions ◽  
Dielectric Constants ◽  
Electric Response ◽  
Dipole Strength ◽  
Metal Organic ◽  
Dynamics Simulations

Recently the possibility of using electric fields as a further stimulus to trigger structural changes in metal-organic frameworks (MOFs) has been investigated. In general, rotatable groups or other types of mechanical motion can be driven by electric fields. In this study we demonstrate how the electric response of MOFs can be tuned by adding rotatable dipolar linkers, generating a material that exhibits paralectric behavior in two dimensions and dielectric behavior in one dimension. The suitability of four different methods to compute the relative permittivity κ by means of molecular dynamics simulations was validated. The dependency of the permittivity on temperature T and dipole strength μ was determined. It was found that the herein investigated systems exhibit a high degree of tunability and substantially larger dielectric constants as expected for MOFs in general. The temperature dependency of κ obeys the Curie-Weiss law. In addition, the influence of dipolar linkers on the electric field induced breathing behavior was investigated. With increasing dipole moment, lower field strength are required to trigger the contraction. These investigations set the stage for an application of such systems as dielectric sensors, order-disorder ferroelectrics or any scenario where movable dipolar fragments respond to external electric fields.

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