采用CeO2-TiO2复合物薄膜作为聚苯胺电致变色器件的对电极,选用聚合物固态电解质(PE:PMMA-PC-EC-L iC lO4),构筑了新型双层结构(Dual-type)聚苯胺(PANI)固态电致变色(EC)器件.用电化学现场紫外-可见光谱法表征了该EC器件(ITO|PANI||PE||...采用CeO2-TiO2复合物薄膜作为聚苯胺电致变色器件的对电极,选用聚合物固态电解质(PE:PMMA-PC-EC-L iC lO4),构筑了新型双层结构(Dual-type)聚苯胺(PANI)固态电致变色(EC)器件.用电化学现场紫外-可见光谱法表征了该EC器件(ITO|PANI||PE||CeO2-TiO2|ITO)的电致变色性能,并与单层结构(S ingle-type)EC器件(ITO|PANI||PE||ITO)进行了比较.研究结果表明,双层结构EC器件比单层结构EC器件的电致变色性能好,如响应速度快,循环寿命长.同时,考察了电解质组分对聚苯胺电致变色稳定性的影响.EC器件(ITO|PANI||PE||CeO2-TiO2|ITO)的颜色呈现由透明的黄色(-1.5 V,PANIvs.CeO2-TiO2)到蓝色(1.0 V)的可逆变化,在700 nm处的透射率由42.19%变到13.35%,经过150个循环,其透射率差仍保持不变,着色效率为152.1 cm2/C.展开更多
The study of size effect of conductivity of conducting polymer nanowires can be significant not only in the instruction of fabrication of the devices with nanodimension but also in basic research of inherence of nanom...The study of size effect of conductivity of conducting polymer nanowires can be significant not only in the instruction of fabrication of the devices with nanodimension but also in basic research of inherence of nanomaterials. PANI nanowires was fabricated in AAO templates by potentiostatic method. A new strategy of chemical modification of AAO template was introduced to prepare nanowires with smaller diameter. FTIR and contact angle measurements were used to characterize the modification. Tunneling Electron Microscopy results showed that the smaller PANI nanowires in diameter can be obtained in surfactant modified AAO templates. Conductivity of single PANI nanowire had been measured by Conductive Atomic Force Microscopy. The results displayed that the conductivity of PANI nanowire increase while the decrease of the diameter of PANI nanowires, which was called size effect of conductivity of PANI nanowires. The size effect had been attributed to order polymer chains orientation of PANI nanowire, which had been confirmed by electron diffraction diagrams.展开更多
PANI nanodots array was fabricated in AAO template with potentiostatic method in a short time.The topographic image of PANI nanodots array was characterized by scanning electron microscopy(SEM) and atomic force micros...PANI nanodots array was fabricated in AAO template with potentiostatic method in a short time.The topographic image of PANI nanodots array was characterized by scanning electron microscopy(SEM) and atomic force microscopy(AFM).The I-V characteristics of conducting PANI nanodots array was measured with conducting atomic force microscope(C-AFM) in atmosphere at room temperature.Coulomb staircase phenomena was observed in the I-V curves.展开更多
文摘The study of size effect of conductivity of conducting polymer nanowires can be significant not only in the instruction of fabrication of the devices with nanodimension but also in basic research of inherence of nanomaterials. PANI nanowires was fabricated in AAO templates by potentiostatic method. A new strategy of chemical modification of AAO template was introduced to prepare nanowires with smaller diameter. FTIR and contact angle measurements were used to characterize the modification. Tunneling Electron Microscopy results showed that the smaller PANI nanowires in diameter can be obtained in surfactant modified AAO templates. Conductivity of single PANI nanowire had been measured by Conductive Atomic Force Microscopy. The results displayed that the conductivity of PANI nanowire increase while the decrease of the diameter of PANI nanowires, which was called size effect of conductivity of PANI nanowires. The size effect had been attributed to order polymer chains orientation of PANI nanowire, which had been confirmed by electron diffraction diagrams.
文摘PANI nanodots array was fabricated in AAO template with potentiostatic method in a short time.The topographic image of PANI nanodots array was characterized by scanning electron microscopy(SEM) and atomic force microscopy(AFM).The I-V characteristics of conducting PANI nanodots array was measured with conducting atomic force microscope(C-AFM) in atmosphere at room temperature.Coulomb staircase phenomena was observed in the I-V curves.
