Simulation of electrical conductivity for polymer silver nanowires systems

Abstract

A simple model is developed for the conductivity of polymeric systems including silver nanowires (AgNWs). This model reveals the effects of interphase thickness, tunneling distance, waviness and aspect ratio of nanowires, as well as effective filler volume fraction on the percolation and electrical conductivity of AgNW-reinforced samples. The validity of this model is tested by using the measured data from several samples. Based on this model, the conductivity calculations are in proper accordance with the measured values. A large network and a low percolation onset are produced by nanowires with a high aspect ratio developing the nanocomposite conductivity. The results also show that a thicker interphase expands the network, thereby increasing the electrical conductivity. Furthermore, non-waved AgNWs exhibit more conductivity compared to wavy nanowires. It is concluded that the surface energies of polymer medium and nanowires have no effect on the conductivity of samples. On the other hand, the volume fraction and aspect ratio of nanowires, in addition to the interphase thickness and tunneling distance have the greatest influences on the conductivity of nanocomposites.

Electrochemical Wearable Biosensors and Bioelectronic Devices Based on Hydrogels: Mechanical Properties and Electrochemical Behavior

“…AuNPs have been shown to improve the stability and sensitivity of biosensors by providing a high surface area for immobilizing biological molecules, such as enzymes or antibodies, and facilitating electron transfer at the electrode surface [ 94 ]. A transparent nanofiber hydrogel patch capable of glucose-responsive behavior was successfully developed for continuous and non-invasive glucose monitoring from interstitial fluid (ISF).…”

Purposive Design of Stretchable Composite Electrodes for Strain‐Negative, Strain‐Neutral, and Strain‐Positive Ionic Sensors

“…Notably, A eff measured by C-AFM was varied by the applied voltage; that is, a low applied voltage led to a small value of A eff (Figure S3, Supporting Information) because the thin SIBS layer possibly coated on the Ag flakes needs a threshold voltage for electrical tunneling. [44][45][46] Figure 3k shows the total A surf and the total A eff compared to the initial total area of the electrode as a function of ϕ Ag for the initial state (𝜖 = 0%) and the stretched state (𝜖 = 50%). A constant value ( = 1.275) was multiplied by the measured A surf and A eff for the stretched state by considering the Poisson's ratio (𝜈 ≈ 0.3).…”

Second harmonic generation on crystalline organic nanoclusters under extreme nanoconfinement in functionalized silica–benzil composites

“…In relevant technologies, the individual components can be altered and tailored in many ways aiming at utilizing their desired properties to the resultant nanocomposite structure as a whole. As heterogeneous multiphase formations, they can be fabricated combining appropriate organic and inorganic materials in various nanoscale morphologies such as e.g., carbon nanotubes 1 – 4 and nanoribbons 5 – 7 , graphene nanoplatelets 8 – 10 , carbon, perovskite and semiconductor quantum dots 11 – 13 , nanoparticles and nanospheres 14 – 16 , nanowires 17 – 21 , organic dyes 22 , nanocrystals 23 – 25 , isotropic liquids 26 or anisotropic liquid crystal materials 27 – 30 being incorporated into organic or inorganic liquids or host solid media such as e.g., polymers or inorganic nanoporous materials. Among the latter ones, mesoporous silica, p SiO (hereafter PS ) 31 , likewise the mesoporous silicon Si 32 – 34 and alumina p Al O (anodic aluminum oxide, AAO) 35 may be considered as most advanced host matrices for many nanocomposite technologies.…”