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dielectrics

Mechanical Constraints Enhance Electrical Energy Densities of Soft Dielectrics

Submitted by Lin Zhang on
research
research
pull-in instability
dielectrics
electro-creasing instability
SAMs Lab research
high-energy-density organic capacitor

Mechanical Constraints Enhance Electrical Energy Densities of Soft Dielectrics

Lin Zhang, Qiming Wang and Xuanhe Zhao*

 Applied Physics Letter, In press 

Abstract

Electro-creasing instability in deformed polymers: experiment and theory

Submitted by Qiming Wang on
research
electromechanical instability
dielectrics
electro-creasing instability
pattern formation
SAMs Lab research

Electro-creasing instability in deformed polymers: experiment and theory

Qiming Wang, Mukarram Tahir, Lin Zhang, and Xuanhe Zhao*

Soft Matter, In Press 

Creasing to cratering instability in polymers under ultrahigh electric fields

Submitted by Qiming Wang on
research
electromechanical instability
dielectrics
electro-creasing instability
pattern formation
SAMs Lab research

Creasing to cratering instability in polymers under ultrahigh electric fields

Qiming Wang, Lin Zhang, and Xuanhe Zhao*

Physical Review Letters, In press

Journal Club Theme of March 2009: Mechanics Issues in Nanocapacitors and Ramifications for Energy Storage

Submitted by Pradeep Sharma on
research
thin films
dielectrics
nanocapacitors

Next generation advances in energy storage for nanoelectronics, micro and nanosensors among others, require capacitors fabricated at the nanoscale. High dielectric constant materials such as ferroelectrics are important candidates for those. Consider the following: the expected capacitance of a 2.7 nm SrTiO3 thin film is 1600 fFmicro-m-2. What is the likely value in reality? 258 fFmicrom-2! This dramatic drop in capacitance is attributed to the so-called "dead layer" effect.

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