Investigations on the influence of substrate temperature in developing enhanced response ZnO nano generators on flexible polyimide using spray pyrolysis technique

Singh

2018

Nanotechnology

Self Cite

Zinc oxide (ZnO) is a remarkable inorganic semiconductor with exceptional piezoelectric properties compared to other semiconductors. However, in comparison to lead-based hazardous piezoelectric materials, its features have undesired limitations. Here we report the 5~6 folds enhancement in the piezoelectric properties via chemical doping of copper matched to intrinsic ZnO. The flexible piezoelectric nanogenerator (F-PENG) device was fabricated using an unpretentious solution process of spin coating with other advantages like robust, low weight, improved adhesion, and low cost. The devices were used to demonstrate energy harvesting from a Standard weight as low as 4 gm and can work as a self-powered mass sensor in a broad range of 4 to 100 gm. The device exhibited a novel energy harvesting technique from a wind source due to its inherent flexibility. At three different velocities (10~30 m/s) and five different angles of attack (0~180 degrees), the device validated the ability to discern different velocities and directions of flow. The device will be useful for mapping the flow of air apart from harvesting the energy. The simulation was done to verify the underlining mechanism of aerodynamics involved in it.

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhancement of ZnO-based flexible nano generators via a sol–gel technique for sensing and energy harvesting applications

Singh

2018

Nanotechnology

Self Cite

“…Piezoelectric nanogenerators are extensively employed as force/strain sensors in numerous applications in industries. , The device here in this experiment was tested under variable forces, which reveals a vital figure of merit called the sensitivity of the device. The device was tested at different force/acceleration conditions, viz.…”

Section: Results and Discussionmentioning

confidence: 99%

Novel Interfacial Bulk Heterojunction Technique for Enhanced Response in ZnO Nanogenerator

ACS Appl. Mater. Interfaces

Raj

Singh

et al. 2019

Self Cite

In this paper, a direct sustainable approach for the development of a n-ZnO:p-CuO heterojunction (ZCH) through a simple grinding is reported to be an effective technique to enhance the piezoelectric performance of ZCH/polydimethylsiloxane (PDMS) nanocomposite-based nanogenerators (ZP-PNGs). We have first optimized the best concentration for ZnO/PDMS nanocomposite for the realization of the piezoelectric nanogenerator. Later, with the same configuration, we implemented a novel, simple, facile, frugal, and inexpensive technique to fabricate ZCH. The heterojunction results in the improved charge transfer characteristics, low capacitance, and charge nullification contributing to the enhanced piezoelectric output. This reflects in the improvement of the peak-to-peak piezoelectric potential of the device from 2.7 to 9 V. The instantaneous max power density was found to be 0.2 mW/m2. The device can work as a force sensor with improved sensitivity of 1.7 V/N compared to 1.05 V/N of the intrinsic device. The device is being systematically studied for load matching and capacitor charging to demonstrate its practicability. Furthermore, we tested our device to harness the biomechanical energy from day-to-day life activities. Finally, the device was used to fabricate sustainable piezoelectric-based smart urinal systems for low-income group countries.

“…PI is often used for EA devices due to its commercial viability, high dielectric constant, high electric field strength, and extraordinary environmental stability. [ 60,64,76–78 ] Hamza et al modeled the Kapton‐based gripper to attract metallic or polymer particles. [ 79 ] Compared to PVC particles, copper particles adhere considerably better at lower voltage due to the high mobility of free charge carriers in conductors.…”

Section: Advances In Materials and Fabrication For Ea Technologymentioning

confidence: 99%

Advancement of Electroadhesion Technology for Intelligent and Self‐Reliant Robotic Applications

Advanced Intelligent Systems

Muthu

Liu

et al. 2022

The growing need for automation in industries has foreseen drastic advancements in the development of soft robotics in the areas of navigation systems, textiles, healthcare, and biometric monitoring. Electroadhesion (EA)‐based robotic applications benefit from ultralow power consumption, low maintenance, choices in versatile surfaces, sustainable life cycles, applicability in harsh and vacuum environments, and exteroceptive/proprioceptive abilities. It is of scientific and technological importance to comprehend the sequence of developments in working mechanisms, modeling, and materials to explore its full potential for future intelligent robotics systems. This review provides an all‐inclusive roadmap of EA technology from its inception to unprecedented developments and complex relationships across multidisciplines, viz., robotics, solid and fluid mechanics, electrostatics, haptics, space technologies, nanotechnology, and IoT.