In the present era of intelligent electronics and Internet
of Things
(IoT), the demand for flexible and wearable devices is very high.
Here, we have developed a high-output flexible piezoelectric nanogenerator
(PENG) based on electrospun poly(vinylidene fluoride) (PVDF)-barium
titanate (BaTiO3) (ES PVDF-BT) composite nanofibers with
an enhanced electroactive phase. On addition of 10 wt % BaTiO3 nanoparticles, the electroactive β-phase of the PVDF
is found to be escalated to ∼91% as a result of the synergistic
interfacial interaction between the tetragonal BaTiO3 nanoparticles
and the ferroelectric host polymer matrix on electrospinning. The
fabricated PENG device delivered an open-circuit voltage of ∼50
V and short-circuit current density of ∼0.312 mA m–2. Also, the PVDF-BT nanofiber-based PENG device showed an output
power density of ∼4.07 mW m–2, which is 10
times higher than that of a pristine PVDF nanofiber-based PENG device.
Furthermore, the developed PENG has been newly demonstrated for self-powered
real-time vibration sensing applications such as for mapping of mechanical
vibrations from faulty CPU fans, hard disk drives, and electric sewing
machines.
Ufasomes are unsaturated fatty acid vesicles. They are the suspensions of fatty acids and their ionized species (soap) which are arranged as closed lipid bilayer. The molecular arrangement in ufasome is that the hydrocarbon tails are oriented towards inferior of the membrane and carbonyl groups are in contact with water. The stability of formulation depends on the selection of fatty acid, pH range, amount of lipoxygenase etc. Film hydration method is used for the preparation of vesicle by using oleic acid as fatty acid principle components. The present article describes about the advantages, disadvantages, method of preparation, in vitro evaluation and resent innovations of ufasomes. The present investigation aims at exploring the potential of fatty acid vesicle for the topical delivery of drugs. Earlier ufasomes where considered as the pre-biotic models for cellular compartments. Now, ufasomes are also found as carriers for horizontal transfer of engineered gene from plants to soil microbes or environment.
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