一種新型的軟性紡織型NH3 氣體感測器是通過氧化石墨烯(GO)在單根棉線上的層接式自組裝(LBL-SA)，將聚(氫氧化氯烯丙胺)(PAH)/聚(4-苯乙烯磺酸鈉)((PSS)/PAH) 雙層( 前驅層) 吸附在單根棉線上。然後在(PSS/PAH)/yarn 層接式自組裝接上GO 單層(GO/PAH)和多層(GO/PAH)n (n= 2,3)薄膜。掃描電子顯微鏡(SEM)來分析GO 薄膜的表面結構。感測器電阻變化的關鍵是離子傳導，這增加了(GO/PAH)n/PSS/PAH 薄膜的導電性。探討層接式自組裝GO 薄膜電學性質與NH3 氣體濃度的關係性，來瞭解(GO/PAH)n 雙層對氣體感測特性(反應和線性)的影響。由(GO/PAH)1 薄膜製成的單根線NH3氣體感測器在室溫下表現出較佳的靈敏度。對感測線性、反應和回復時間、選擇性和可撓性也進行探討。
A novel flexible textile-type NH3 gas sensor was fabricated by the layer-bylayer self-assembly (LBL-SA) of graphene oxide (GO) on a single yarn. A poly(allylamine hydrochloride)(PAH)/poly(4-styrenesulfonic acid) sodium salt ((PSS)/PAH) bilayer (precursor layer) was LBL deposited on a single yarn substrate. Then, a monolayer (GO/PAH) and GO multilayer (GO/PAH)n (n = 2, 3) thin films self-assembled LBL on a (PSS/PAH)/yarn substrate. The thin films
were analyzed by scanning electronic microscopy (SEM). The key step in the operation of this sensor was the ion transport, which increased the conductivity of the (GO/PAH)n/PSS/PAH thin films. The electrical properties of the LBL selfassembled GO thin films were studied in detail as functions of concentrations of NH3 gas, to elucidate the effects the number of (GO/PAH)n bilayers on the gas sensing properties (response and linearity). The single yarn NH3 gas sensor that was made of the (GO/PAH)1 thin film exhibited a strongest sensitivity at room temperature. The sensing linearity, response and recovery times, selectivity and bending effect were also studied.
