為了與全球綠色倡議保持一致，在開發介電材料時需要充分考慮尋找替代綠色有機材料的緊迫性。 然而，可持續發展的目標不僅限於元件的表現，還包含製程中使用的所有材料。 羧甲基纖維素（CMC）為一種乙酸基的水溶性材料其結構中含有鈉離子，因此可以藉由檸檬酸作為交聯前驅物來生產聚電解質固體材料。 羧甲基纖維素基水凝膠添加羥丙基甲基纖維素（HPMC）和糊精的楊氏模量分別為2.67 MPa和0.89 MPa，表現出類似橡膠的機械性能。 我們還成功生產了一種應用於綠色介電的羧甲基纖維素基水凝膠薄膜，其介電常數高達78，並可以在低電壓下操作。 同時具有相對穩定且較高的電容值(CMC + HPMC = 1820 nF/cm2，CMC + dextrin = 2090 nF/cm2)，可以在 VD = ±3 V 工作。因此聚電解質型之介電層製造水凝膠薄膜，並使用聚（2-乙烯基蒽）（PVAn）進行表面改質，在較薄的介電層（d ≈ 30 nm）可以達到較小的電壓閾值（Vth ≈ -0.8 V）、中等跨導(gM ≈ 65 nS）以及相對較高的開關比（約 105）。 在 Vg = ±3.5V 和100個循環的開關測試後，介電層也表現出穩定的性能。通過使用100納米的二氧化矽作為支撐層，並利用旋轉塗佈技術來製造P3HT的半導體層，PVAn修飾的水凝膠在±30 V操作下，設備中展現出一致的性能特徵。 結果表明，透過PVAn改質後的羧甲基纖維素基水凝膠其電性能可在低電壓條件下操作，並作為綠色介電材料。

To the extent of aligning with the green global initiative, the urgency for finding an alternative green organic material in developing the dielectric material needs to be considered thoroughly. However, the sustainability goal also extends to all precursors used in the process, not limited only on the final result of dielectric material. Carboxymethyl cellulose (CMC) is a water-soluble material derived from acetic group component which also contains sodium ions in the structure. Hence, it could produce a polyelectrolyte solid material with the help of citric acid as the crosslink precursor. Carboxymethyl cellulose-based hydrogel showed a rubber-like mechanical property with Young’s modulus of 2.67 MPa and 0.89 MPa for additional material of hydroxypropyl methylcellulose (HPMC) and Dextrin, respectively. We also successfully produced a thin film of carboxymethyl cellulose-based hydrogel for green dielectric purposes, which exhibits a high dielectric constant up to 78, so that it can work in a low-voltage operation. They also showed relatively stable, yet high capacitance values (1820 nF/cm2 and 2090 nF/cm2 for HPMC and dextrin hydrogels, respectively), which could operate around ±3 V. Hence, the fabrication of hydrogel dielectric in polyelectrolyte-type approach, with Poly-(2-vinyl anthracene) (PVAn) surface modification can produce a thin dielectric layer (d ≈ 30 nm), small voltage threshold (Vth ≈ -0.8 V) with moderate transconductance (gm ≈ 65 nS), and relatively high ON-OFF ratio (~ 105). The dielectric layer also showed stable performance after being given bias stress of ± 3.5 V and 100 cycles of switching test. By employing a 100 nm layer of silicon dioxide as a support and utilizing a spin-coating technique to fabricate the semiconductor layer of P3HT, the PVAn-modified hydrogel exhibits consistent performance characteristics in the device with ± 30 V operation. Therefore, the electrical merits of modified carboxymethyl cellulose-based hydrogel showed an acceptable result for a green dielectric material in low-voltage operation.

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