Correction: Ecoresorbable smart fluids with controlled electroresponsive properties by various metal doping

Correction for ‘Ecoresorbable smart fluids with controlled electroresponsive properties by various metal doping’ by Hyukjoon Gwon et al., J. Mater. Chem. C, 2020, 8, 15751–15758, DOI: 10.1039/d0tc04036c.

On the existence and stability of a nonlinear wave system with variable exponents

Problems with variable exponents have attracted a great deal of attention lately and various existence, nonexistence and stability results have been established. The importance of such problems has manifested due to the recent advancement of science and technology and to the wide application in areas such as electrorheological fluids (smart fluids) which have the property that the viscosity changes drastically when exposed to heat or electrical fields. To tackle and understand these models, new sophisticated mathematical functional spaces have been introduced, such as the Lebesgue and Sobolev spaces with variable exponents. In this work, we are concerned with a system of wave equations with variable-exponent nonlinearities. This system can be regarded as a model for interaction between two fields describing the motion of two “smart” materials. We, first, establish the existence of global solutions then show that solutions of enough regularities stabilize to the rest state ( 0 , 0 ) either exponentially or polynomially depending on the range of the variable exponents. We also present some numerical tests to illustrate our theoretical findings.

Ecoresorbable smart fluids with controlled electroresponsive properties by various metal doping

Ecoresorbable electroresponsive smart fluids which are non-toxic, naturally decomposable as well as exhibit remarkable electroresponsive performances are developed.

Basics and Applications of Ferrofluids

Engineered ‘smart' fluids, called ferrofluids, which permit static and dynamic control by external magnetic fields of low or moderate strengths present a novel and challenging domain for scientists and technologists. The introduction of a ‘controllable' or ‘tunable' external force into the momentum transport equations opens up new fields of physical phenomena. In situations where the external field influence becomes strong enough to compete with gravitational forces or acts as a sole external agency to drive flows in the hypo-gravity environment, a new class of hydrodynamic phenomena becomes accessible. Ferrofluids exhibit special rheological properties that make them suited for a number of technological and biomedical applications. This chapter outlines the underlying physics of field-fluid interactions on one hand; on the other, it cites novel techniques in ferrofluid-actuated electronics cooling, hydrostatic & hydrodynamic bearings, extreme-boundary lubrication, damping systems, biomimetic locomotion, and medical diagnostics (e.g. magnetic drug targeting & magnetic cell sorting).

A CO2-responsive smart fluid based on supramolecular assembly structures varying reversibly from vesicles to wormlike micelles

CO2-responsive smart fluids have been widely investigated in the past decade. In this article, we reported a CO2-responsive smart fluid based on supramolecular assembly structures varying from vesicles to wormlike micelles.

Effect of Aerosil and Oleic Acid on Sedimentation of Magnetorheological Fluid

Magnetorheological Fluids (MRFs) are considered as smart fluids because they control viscosity using external magnetic field. It contains ferro-magnetic powder which are aligned in magnetic flux lines. The magnetic force between particles are controlled by magnetic field intensity. This controllable viscosity makes them acceptable in many mechanical applications, but due to difference in density between suspended particles and carrier fluid sedimentation is bound to occur. This thus creates the need of some additives. In our study, silica Nano particles (commercially known as Aerosil 200) is used as stabilizer and Oleic Acid is used as surfactant and their effect on sedimentation is studied in this article. Some other synthesis parameters like particle concentration, stirring duration and material loading also cause some change in sedimentation rate.