利用簡單、快速、易於製作之感測材料製作還原型氧化石墨烯-二氧化錫（rGO-SnO2）之石英微天平型（QCM）氨氣（NH3）氣體感測器。本研究使用傅里葉變換紅外光譜 （FTIR）、原子力顯微鏡 （AFM）、掃描電子顯微鏡 （SEM） 結合能量色散 X 射線（EDX） 元素映射和穿透式電子顯微鏡（TEM）用於分析 rGO-SnO2 複合薄膜在QCM晶片上的形貌、結構和組成。微觀結構觀察顯示，SnO2是附著在 rGO 片材的表面，rGO片材則是裸露在複合膜的表面上。本實驗探討rGO 添加量，對於增加 rGO複合薄膜對NH3的感測特性。另外本實驗利用品質因子（Quality factor）和吸附動力學分析（結合常數）來說明rGO-SnO2複合膜QCM NH3氣體傳感器比原始SnO2膜具有更高的靈敏度。
Novel room-temperature QCM NH3 gas sensors based on rGO-SnO2 composite film were fabricated via one-pot route. This technique is useful for practical application because its fast and ease of fabrication.Fourier transform infrared spectroscopy (FTIR) , atomic force microscopy (AFM) , scanning electron microscopy (SEM) coupled with an energy dispersive X-ray (EDX) elemental mapping and Transmission electron microscope (TEM) were used to analyze the morphology, structure and composition of rGO-SnO2 composite films. Microstructural observations revealed that the SnO2 attached to the surface of rGO sheets, and naked rGO sheets on the surface of the rGO-SnO2 composite film. The effects of the addition amounts of loading of rGO on the enhancing the NH3 gas-sensing properties of the rGO-SnO2 composite films were investigated. The quality (Q) factor and adsorption dynamic analysis (association constant) were used to elucidate the QCM NH3 gas sensor based on rGO-SnO2 composite film had higher sensitivity than that of the pristine SnO2 film.
