A Facile Approach To Develop a Highly Stretchable PVC/ZnSnO₃ Piezoelectric Nanogenerator with High Output Power Generation for Powering Portable Electronic Devices

Harvesting mechanical energy from the ambient environment with piezoelectric nanogenerators (PENGs) consisting of piezoelectric nanoparticles (NPs) and flexible polymer has drawn considerable attention for developing self-powered electronic devices. Here, a flexible, lead-free, solution processable PENG, composing piezoelectric ZnSnO₃ NPs and plasticized PVC was fabricated by a simple solution casting method. The nanogenerator shows a <i>V</i>_OC of ∼40 V, a <i>I</i>_SC of ∼1.4 μA, and an overall power density more than ∼3.7 μW cm^–2 at 35 wt % loading of ZnSnO₃, and these values are the highest reported so far in the literature on the cubic ZnSnO₃-based nanogenerator. We utilized the generated power for powering seven different color LEDs without any external energy storage unit. Also, the nanogenerator could charge a commercial capacitor (2.2 μF) to ∼6.7 V in ∼129 s, which can be used for powering wristwatch, mobile LCD screen, and calculator

A Facile Approach To Develop a Highly Stretchable PVC/ZnSnO₃ Piezoelectric Nanogenerator with High Output Power Generation for Powering Portable Electronic Devices

Harvesting mechanical energy from the ambient environment with piezoelectric nanogenerators (PENGs) consisting of piezoelectric nanoparticles (NPs) and flexible polymer has drawn considerable attention for developing self-powered electronic devices. Here, a flexible, lead-free, solution processable PENG, composing piezoelectric ZnSnO₃ NPs and plasticized PVC was fabricated by a simple solution casting method. The nanogenerator shows a <i>V</i>_OC of ∼40 V, a <i>I</i>_SC of ∼1.4 μA, and an overall power density more than ∼3.7 μW cm^–2 at 35 wt % loading of ZnSnO₃, and these values are the highest reported so far in the literature on the cubic ZnSnO₃-based nanogenerator. We utilized the generated power for powering seven different color LEDs without any external energy storage unit. Also, the nanogenerator could charge a commercial capacitor (2.2 μF) to ∼6.7 V in ∼129 s, which can be used for powering wristwatch, mobile LCD screen, and calculator

An Approach To Fabricate PDMS Encapsulated All-Solid-State Advanced Asymmetric Supercapacitor Device with Vertically Aligned Hierarchical Zn–Fe–Co Ternary Oxide Nanowire and Nitrogen Doped Graphene Nanosheet for High Power Device Applications

We highlight the design and fabrication of a polydimethylsiloxane (PDMS) encapsulated advanced all-solid-state asymmetric supercapacitor (ASC) device consisting of hierarchical mesoporous zinc–iron–cobalt ternary oxide (ZICO) nanowire coated nickel (Ni) foam (ZICO@Ni foam) as a promising positive electrode and nitrogen doped graphene coated Ni foam (N-G@Ni foam) as negative electrode in the presence of PVA–KOH gel electrolyte. Owing to outstanding electrochemical behavior and ultrahigh specific capacitance of ZICO (≈ 2587.4 F/g at 1 A/g) and N-G (550 F/g at 1 A/g) along with their mutual synergistic outputs, the assembled all-solid-state ASC device exhibits an outstanding energy density of ≈40.5 Wh/kg accompanied by a remarkable long-term cycle stability with ≈95% specific capacitance retention even after 5000 charge–discharge cycles. The exclusive hierarchical ZICO nanowires were synthesized by a facile two-step process comprising of a hydrothermal protocol followed by an annealing treatment on a quartz substrate. While Zn²⁺ gives the stability of the oxide system, Fe and Co ions provide better electronic conductivity and capacitive response under vigorous cyclic condition. The extraordinary performance of as-fabricated ASC device resembles its suitability for the construction of advanced energy storage devices in modern electronic industries

PDMS-ZnSnO₃/Ag₂O‑Based Nanocomposites for Mechanical Energy Harvesting and Antibacterial Applications

Bacterial fouling of self-powered implantable devices poses severe concerns for device implantation in the human body or water system installation. Here, a piezocomposite based on polydimethylsiloxane-zinc stannate/silver oxide (PDMS-ZnSnO3/Ag2O) has been fabricated and studied for its mechanical energy harvesting capability, as well as its antibacterial activity toward the Pseudomonas aeruginosa bacterium model. The surface decoration of n-type ZnSnO3 nanocubes with p-type Ag2O made an effective bulk p–n heterojunction, which augmented its energy harvesting and biological activities. The maximum output voltage, current, and power density of the fabricated piezoelectric nanogenerator (PENG) are ∼36 V, ∼1.9 μA, and ∼11.4 μW/cm2, respectively, under finger tapping. The enhanced energy harvesting property has been well explained by the high piezoelectric coefficient of modified nanoparticles obtained from the piezoresponse force microscopy (PFM) study. Moreover, the energy conversion efficiency of the PENG estimated during capacitor (10 μF) charging is ∼2.49%. Moreover, a Gram-negative bacterium model is chosen for the biofilm formation study. Biofilm assay, antimetabolite, and intracellular reactive oxygen species (ROS) studies reveal that the piezocomposite containing ZnSnO3/Ag2O is an excellent material for antibacterial activities. Thus, this work has proposed the idea of utilizing an electron-screen-enabled antibacterial piezocomposite, which could efficiently harvest human motion/blue energy incessantly with a specially designed electrode

PDMS-ZnSnO₃/Ag₂O‑Based Nanocomposites for Mechanical Energy Harvesting and Antibacterial Applications

Bacterial fouling of self-powered implantable devices poses severe concerns for device implantation in the human body or water system installation. Here, a piezocomposite based on polydimethylsiloxane-zinc stannate/silver oxide (PDMS-ZnSnO3/Ag2O) has been fabricated and studied for its mechanical energy harvesting capability, as well as its antibacterial activity toward the Pseudomonas aeruginosa bacterium model. The surface decoration of n-type ZnSnO3 nanocubes with p-type Ag2O made an effective bulk p–n heterojunction, which augmented its energy harvesting and biological activities. The maximum output voltage, current, and power density of the fabricated piezoelectric nanogenerator (PENG) are ∼36 V, ∼1.9 μA, and ∼11.4 μW/cm2, respectively, under finger tapping. The enhanced energy harvesting property has been well explained by the high piezoelectric coefficient of modified nanoparticles obtained from the piezoresponse force microscopy (PFM) study. Moreover, the energy conversion efficiency of the PENG estimated during capacitor (10 μF) charging is ∼2.49%. Moreover, a Gram-negative bacterium model is chosen for the biofilm formation study. Biofilm assay, antimetabolite, and intracellular reactive oxygen species (ROS) studies reveal that the piezocomposite containing ZnSnO3/Ag2O is an excellent material for antibacterial activities. Thus, this work has proposed the idea of utilizing an electron-screen-enabled antibacterial piezocomposite, which could efficiently harvest human motion/blue energy incessantly with a specially designed electrode