本研究將有機銀油墨塗佈在聚酯纖維織物上，透過加熱使銀離子還原在織物上形成導電線路。首先，對織布進行粗化處理以增加還原後銀粒子之附著度，其次將織布浸泡於防潑水劑中防止墨水側擴散，再以波長450nm的半導體雷射雕刻機在耐熱膠帶上雕刻出天線的圖案作為遮罩，最後將有機銀油墨塗佈其上並加熱燒結於聚酯纖維織物上。 模擬部分，以Sonnet軟體對天線圖案進行設計優化，使響應頻率落於超高頻段，並探討聚酯纖維織物的拉伸對於天線響應頻率之影響。實驗量測的結果顯示拉伸織物會造成頻率的偏移，其量值為-13.33MHz/mm，定性上符合模擬結果。在天線的指向性測試中發現在方位角20度時有最大的讀取距離(d_max=32.8 cm)，然而各方向上的讀取距離差異不大且無偏振相依。本研究結果展示了在織物上製作應力感測器及物聯網天線的潛力。 ;The reduction and patterning of silver-based organo-metallic ink on polyester fabrics using laser direct writing and in-situ heating is reported. Essentially, the fabric was roughened to enhance the adhesion of Ag nanoparticles. Next, the fabric was soaked in water-repellent to prevent lateral diffusion. Subsequently the antenna pattern was direct-write created in a thermal-resistant tape using laser engraving machine operated at λ=450nm. Finally, the ink was drop coated and thermally-assisted reduction was conducted, yielding the antenna pattern on textiles. Theoretically, Sonnet software was used to design the antenna structures aiming at operating at ultra-high frequency (UHF) range. Experimentally, the drift of resonant frequency as a function of the applied strain (elongation) was measured yielding a value of -13.33MHz/mm which is in close agreement with the simulated result. It is also found that the radiation pattern is insensitive to polarizations and the directivity is almost uniform with a maximum detection range of 32.8 cm. This result promises potential applications in smart textiles, strain sensing, and internet of things (IoTs).
