功能材料
功能材料
공능재료
Journal of Functional Materials
2015年
21期
21064-21068
,共5页
吴月梅%刘应开%张恒%马蒋%李双会%秦昭君%陈伟武%龚乃良%艾鹏
吳月梅%劉應開%張恆%馬蔣%李雙會%秦昭君%陳偉武%龔迺良%艾鵬
오월매%류응개%장항%마장%리쌍회%진소군%진위무%공내량%애붕
纳米传感器%气敏特性%响应曲线%相空间
納米傳感器%氣敏特性%響應麯線%相空間
납미전감기%기민특성%향응곡선%상공간
nanosensors%gas sensing properties%response curve%phase space
相空间分析是获得传感器的动力学演化信息的有效方法。本文将稀土 La3+掺杂的 SnO 2纳米带气敏响应曲线转化到相空间中的特性曲线,标定了相空间的特征参数,系统分析了 La3+掺杂的 SnO 2纳米带器件的气敏响应动力学行为。研究表明,La3+掺杂的 SnO 2纳米传感器对丙酮、乙醇和乙二醇3种气体都具有良好的复原性;对乙二醇具有较高的灵敏度和优良的选择性;且随着浓度增加,传感器对乙二醇的吸附效率不足,而脱附效率明显,表现出一种排斥作用,不是理想的“依赖型”气敏传感器。通过相空间分析给出了理想传感器在相空间的动力学特征和模式识别特征,为设计和制作“依赖型”气敏元件提供了理论指导和判断依据。
相空間分析是穫得傳感器的動力學縯化信息的有效方法。本文將稀土 La3+摻雜的 SnO 2納米帶氣敏響應麯線轉化到相空間中的特性麯線,標定瞭相空間的特徵參數,繫統分析瞭 La3+摻雜的 SnO 2納米帶器件的氣敏響應動力學行為。研究錶明,La3+摻雜的 SnO 2納米傳感器對丙酮、乙醇和乙二醇3種氣體都具有良好的複原性;對乙二醇具有較高的靈敏度和優良的選擇性;且隨著濃度增加,傳感器對乙二醇的吸附效率不足,而脫附效率明顯,錶現齣一種排斥作用,不是理想的“依賴型”氣敏傳感器。通過相空間分析給齣瞭理想傳感器在相空間的動力學特徵和模式識彆特徵,為設計和製作“依賴型”氣敏元件提供瞭理論指導和判斷依據。
상공간분석시획득전감기적동역학연화신식적유효방법。본문장희토 La3+참잡적 SnO 2납미대기민향응곡선전화도상공간중적특성곡선,표정료상공간적특정삼수,계통분석료 La3+참잡적 SnO 2납미대기건적기민향응동역학행위。연구표명,La3+참잡적 SnO 2납미전감기대병동、을순화을이순3충기체도구유량호적복원성;대을이순구유교고적령민도화우량적선택성;차수착농도증가,전감기대을이순적흡부효솔불족,이탈부효솔명현,표현출일충배척작용,불시이상적“의뢰형”기민전감기。통과상공간분석급출료이상전감기재상공간적동역학특정화모식식별특정,위설계화제작“의뢰형”기민원건제공료이론지도화판단의거。
The analysis of response curves in phase space is an effective way to get information on the dynamical evolution of the sensor.In this paper,the response curves of a single La3 +-doped SnO 2 nanobelt gas sensor in the time domain are transformed into the characteristic curves of it in phase space.The feature parameters are calibrated in phase space and then the gas sensing dynamic behaviors of a single La3 +-doped SnO 2 nanobelt de-vice are analyzed systematically.The results are as follows:(1 )The single La3 +-doped SnO 2 nanobelt device has good resiliences to acetone,ethanol and ethanediol;(2)It has a high sensitivity and an excellent selectivity especially to ethanediol;(3)The adsorption efficiency behaves insufficiently as the ethanediol concentration in-creases,but the desorption efficiency is obvious,indicating a repulsive effect,and the device is not an ideal"de-pendent" gas sensor.The dynamical characteristics and pattern recognition of the ideal sensor are given by the phase space analysis so that the theoretical guidance and judgment are provided to design and prepare the "de-pendent" gas sensor.