此研究係延續104年度科技部計晝”利用近場電紡織技術製作高透明、可撓式奈米發電機，應用 於主動式傳感器、復健形變偵測器，MOST 104-2221-E-008 -021”之延續性研究，利用近場電紡織技 術(Near-field electrospinning, NFES)沉積奈米纖維，整合不同製造技術與新興奈米材料，包含使 用石墨烯、3D-print不同曲面形狀基板作為電極，製成全透明之奈米感測器，結合靜電式 (triboelectric)發電機以增加功率輸出。預計以三年期間，分別開發：第一年以直寫方式將壓電高分 子材料聚偏氟乙烯（polyvinylidene fluoride，PVDF)利用NFES將奈米纖維排列在可撓性與高透光率 石墨烯基底上製成奈米發電機，預計達成之技術規格：sheet resistance〜1000 ohm/square, optical transmittance ~85%, Area power density 6. 75 W/m2;目前國際領先指標規格為：Piezoelectric NWs voltage 10V [1]。第二年利用NFES直線與3D-print不同曲面形狀基板做成壓電發電機。預計達成技 術規格：壓電電壓/電流輸出可達13V/0.85pA，靜電電壓/電流輸出可達20V/1.2pA，最高輸出功率約 為0.68mW，目前國際領先指標規格為：壓電電壓/電流輸出為0.4V/5nA、靜電電壓/電流輸出為 0.8V/20nA [2]。第三年利用奈米纖維(PVDF)做成穿戴式裝置，不需另行供電之動作感知器。預計達 成技術規格為：可擷取震動產生電能6-8V，預期感知作動時可直接驅動控制器本體。目前國際領先指 標中，利用高敏感度感知器改變電阻的方式進行控制，控制器所需工作電壓為3〜5V,但在實體方面仍 須外加電源驅動[3]。 ;This project proposes a facile and maskless method for fabricating nanofiber arrays using near-field electrospinning (NFES) with prescribed patterns and related techniques. The final target is to fabricate batteryless IoT sensors at reasonable cost. Respective aims and project goal can be summarized as follows: Year 1: This first year mainly researches into the fabrication of nanogenerators (NGs), piezoelectric technology and application in electrospinning. The focus of the study is to deposit massively parallel aligned and concentric circles patterned nanofibers-based nanogenerator via near-field electrospinning, By superposition of several nanogenerators, a flexible, self-powered and transparent deformation sensor will be delivered. The specific target is the followings ： sheet resistance 〜1000 ohm/square, optical transmittance 〜85%, area power density 6.75 W/m2. The latest leading indicators based on ZnO piezoelectric NWs is ~voltage 10V [1] Year 2: This second yeart mainly focused on the hybrid nanogenerator by combining piezoelectric and triboelectric NGs. In addition, 3D-printed curved electrode in conjuction with and Cu /PTFE triboelectric generator will be superimposed to produce greater power output. Delievered specifications: piezoelectric voltage/current 13V/0.85^A，triboelectric voltage/current 20V/1.2^A，maximum output power 0.68mW. The latest leading indicators are 0.4V/5nA and 0.8V/20nA for piezoelectric and triboelectric output, respectively [2] Year 3: The third year is the application with particular focus on the the self-powered sensor of wearable device. Moreover, to develop batteryless IoT sensors with the following specifications:. The output signal of the NGs is 6V〜8V and the working voltage of Arduino controller〜3- 5V. Thus Arduino controller can be driven without external power source. Currently the world's most advanced leading indicators such as ultrasensitive sensor based on resistancechange still needs external power source to drive the controller [3].
