基于病毒的压电研讨.ppt

Virus-based piezoelectric energy generation The Effect of the Humidity To other organic materies: water content affect the piezoelectricity To phage film: piezoresponses with in the relative humidity range 30–70% decreased to 1.5 pm /V at a relative humidity 80% Virus-based piezoelectric energy generation Effects of strain amplitude and rate on the peak current Increased linearly strains: 0.06 to 0.1 strain rates:0 to 0.4 /s enhance the current output up to a value of 6 nA Virus-based piezoelectric energy generation Effects of connections In parallel Increase output current In serial Increase output voltage The same polarity Similar electromechanical response phage-based piezoelectric devices can be scaled up to generate higher energy output Virus-based piezoelectric energy generation Experiment Virus-based piezoelectric energy generation Experience (Using 4E-phage films) Fabricat phage-based piezoelectric energy generators (c)Mechanical strain applied onto the device. (d)Short-circuit current signal (e) open-circuit voltage signal Virus-based piezoelectric energy generation Experience (f) peak current amplitude on strain and strain rate. Strain :the ratio of device vertical displacement to initial device thickness, strain rate: the strain change rate per unit time. (g)Short-circuit current 4nA(in parallel ) (h) open-circuit voltage 400mV(in serial) summation of two different devices Under simultaneous mechanical stimulus. signals from the two devices add to give increased current and voltage signals Virus-based piezoelectric energy generation Summary develop a biopiezoelectric device made of genetically modified bacterial viruses (M13 phages) The liquid-crystalline property of these phages enables self-assembly into phage films, resulting in the simple fabrication of piezoelectric generators with sufficient energy output to turn on a liquid-crystal display A higher energy output can be obtai