【摘要】 成功制备了L-半胱氨酸-CdTe/PDDA聚电解质多层膜(QDMF)气体传感器,并以此进行了有害气体甲醛的检测。以Te粉,NaBH4和CdCl2为原料制备前驱体,与修饰剂L-半胱氨酸混合,在氮气氛围下加热回流不同的时间得到所需量子点。通过带负点的量子点与带正电的PDDA之间的静电吸引进行层层自组装(LBL)得到聚电解质多层膜。并通过荧光光谱分析仪,紫外分光光度计等对量子点及多层膜进行表征,进一步证实本论文中制备的气体传感器性能稳定,并能灵敏的检测甲醛气体。更多还原

【Abstract】 CdTe quantum dots(QDS)/Poly(diallyl dimethyl ammonium chloride)(PDDA) multilayer films(QDMF) were synthesized.CdTe quantum dots(QDS) were synthesized by using Te,NaBH4,and CdCl2 as precursors and mercaptopropinic acid(MPA) as Stabilizer.QDMF were fabricated by layer-by-layer(LBL) with CdTe quantum dots(QDS) and Poly(diallyl dimethyl ammonium chloride)(PDDA) with the BSA as the last layer.The effects of means of assembling,concentration of PDDA and layers of films on fluorescence intensity of QDMF have been studied.Fluorescence spectra(FS),fourier transform infrared spectrometer(FTIR),ultraviolet spectra(UV),were employed to characterized these samples.It was found that the concentration of PDDA was excellently impacted PL intensity of QDMF.The stable multilayers can be used as gaseous sensor for detecting formaldehyde.更多还原