Combined effects of pinning and adhesion force on solid\liquid interfacial friction behaviors under applied voltage

Wave impact energy harvesting through water-dielectric triboelectrification with single-electrode triboelectric nanogenerators for battery-less systems

“…This was achieved using a parallel connection of a grid of five WDSE-TENG devices with a coverage area of 230 cm 2 compared to a single WDSE-TENG device. The ability to charge different capacitors was demonstrated, and the output voltage, current, transferred charges, output power and ECE values respond with linear and proportional increase as the water wave impact energy rises, increasing the liquid-solid interface friction, electron exchange and ion adsorption [30][31][32][33]35,[52][53][54] as the frequency varies from 0.7 Hz to 3 Hz, with amplitudes between 10 cm and 12 cm. Thirdly, the grid of WDSE-TENG devices has the potential to drive low-power electronic devices with stored energy levels between 2.24 mJ and 5.96 mJ, and they generate power in the range 3.73 mW-5.18 mW, which is sufficient to power an ultrasonic range sensor, and also to power a wireless transmitter.…”

“…Such increase is attributed and proportional to the total mechanical energy of the breaking water wave impact (2) consisting of potential and kinetic energy that contacts on the WDSE-TENG devices. Which rises from 50.76 J to 73.10 J that produces an increase in the friction between the liquid-solid interface [35,[52][53][54] (Fig. 4 e) increasing the electron exchange and ion adsorption that occurs simultaneously [30][31][32][33] as the frequency and amplitude of impact rises (See Fig.…”

Interfacial friction at action: Interactions, regulation, and applications

“…Fundamentals of interfacial friction have told us how important the interface is. An in-depth understanding of these fundamentals is essential for our exploration of a blueprint for interfacial friction regulation strategies from the perspective of the interface, although there are many developed strategies [137], such as temperature [138][139][140][141][142], pressure [143], electrical [144][145][146][147][148], photo [149,150], magnetic [151], and vibration [152], for interfacial friction regulation.…”

“…Among them, liquid flow characteristics and relative motion characteristics are predicted by Navier-Stokes equation [229][230][231][232][233] and Newtonian mechanics or dynamics, respectively. Unlike the solid or liquid dynamic characteristics, the external stimuli, such as temperature [138][139][140][141][142][234][235][236][237][238], pressure [143], electrical [144][145][146][239][240][241][242], photo [149,150], magnetic [151], and vibration [152], mainly take advantage of the sensitive characteristics of the interfacial intrinsic properties to affect the mechanical coupling interaction. For example, through low interfacial friction property of shark skin has been well-known attributed to the three-dimensional microstructured rib pattern, the imparted streamwise vortices at interfaces, which relies on Refs.…”

“…As for the micro-/nano-fluidics, interfacial friction can provide an expected balance force to control the fluid flow behavior [6,7]. To well balance the interfacial friction, numerous approaches were presented, mainly including external mediation approaches, temperature [138][139][140][141][142], pressure [143], electrical [144][145][146][147][148], photo [149,150], magnetic [151], and vibration [152], and internal mediation approaches, such as liquid pH [291], ionic liquid lubricants [162][163][164][165][166], bubble additives [209][210][211][212], the conformation of the surface polymers [292], and surface molecular shape [293]. Generally, these external mediation approaches are with better controllability and flexibility than the internal one.…”