| The Internet of things network is rapidly developed in our country,we are leading both in speed and efficiency among the other countries.To achieve ‘China Manufacture 2025' and ‘Internet Plus' goal,both demand the support of Internet of thins network.The most important and essential element of the network are sensors with different functionality.As the start point of the network,the sensor has the mission to acquire all the parameter in surrounding environment,so the stability and performance are quite important technology.The semiconductor gas sensor is one of the most important components in the gas sensing area,currently commercialized semiconductor gas sensors need more improvement in stability and performance,which all connected to sensing materials.Problem will be solved easily and efficiently if we could make some modification in the existing sensing materials system.Meanwhile,most of the sensors currently in the market are designed as active electronics,which need external power supply when picking up the signal or diagnosing it.In order to monitoring the parameters of surrounding environment in real time,such as temperature,humidity,sound,light,vibration,the sensors need to be active at any time.In this case,the sensor will continuously consume energy.This not only shorten the lifetime of the sensor but also limited the battery life.Which all lead to the budget increase of network construction and maintenance cost in battery changing,sometime even eliminate the possibility deploying sensors in potential remote area.Self-powered system will solve this problem,the self-powered sensor system based on Triboelectric Nanogenerator could sustain very long time through the energy that converted from vibration,wave and raindrops.This paper mainly focuses on following research:1.Synthesize p type semiconductor Co3O4 sensing material through hydrothermal process,by alternating the concentration of ions in the reactants we were able to achieve Co3O4 with different morphologies.The as achieved comb like Co3O4 got better response time and performance to CO gas which attribute to the hierarchical structure and higher effective surface area.Benefit from that we were able to fabricate real time CO gas leakage detector.2.Combining the electrospinning techniques and hydrothermal process,we were able to achieve the Cu O/Ti O2 heterostructured nanofibers.This new fiber possessed much better performance that the original compounds,and the working temperature significantly droped,so not only lifetime of device was prolonged but also energy consumption was reduced moreover by alternating the working temperature,the sensor was able to detect both formaldehyde and ethanol.This research highly broadens the application of this gas sensor.3.By using silver nanowires as conducting material and silicon rubber as the dielectric,we fabricated flexible super stretchable triboelectric nanogenerator.This device can maintain functional under various extreme mechanical deformations or even after experiencing damage.This device can be used not only as deformable and wearable power source but also as fully autonomous and self-sufficient adaptive electronic skin system.4.A self-healable,flexible and deformable mechanical energy harvester/sensor was achieved by combining a vitrimer elastomer with a silver nanowire conducting network based on the single electrode mode of triboelectric nanogenerator.Due to the fast dynamic disulfide exchange reaction in the vitrimer elastomer,the device possesses a series of fascinating features like excellent elasticity/stretchability,outstanding conformability/deformability,and fast scratch or break recovery under thermal or IPL stimulation.The electrical performance can be restored after repairing damage,even after suffering severe deformation.In combination with these features and a terrace structure,a LEGO-structured TENG was developed.We demonstrated that the LTENG could be deployed as an energy harvester and tactile/pressure sensor. |
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