The post structure aligned carbon nanotube(ACNT) film was prepared by CVD. it was a ultra-hydrophobic film with a higher contact angle(166°) and lower sliding angle(less than 3°). The post structure ACNT fil...The post structure aligned carbon nanotube(ACNT) film was prepared by CVD. it was a ultra-hydrophobic film with a higher contact angle(166°) and lower sliding angle(less than 3°). The post structure ACNT film showed discrete pillar composed of carbon nanotubes, these pillar formed microstructure in the film, which affected both the contact angle and the sliding angle.展开更多
The porous aligned carbon nanotube(ACNTs) films prepared by pyrolysis of metal phthalocyanines show an ultrahydrophobic property. The contact angle for water of the films is 161°. The films modified with fluoroal...The porous aligned carbon nanotube(ACNTs) films prepared by pyrolysis of metal phthalocyanines show an ultrahydrophobic property. The contact angle for water of the films is 161°. The films modified with fluoroalkylsilane show a better hydrophobic property. The contact angle for water of the modified films is as high as 172°. The alignment structure of the films and large fraction of air on the films are considered to be responsible for the ultrahydrophobic property.展开更多
Nanocomposites of PAn-DBSA/γ-Fe 2O 3 with electrical and ferromagnetic behavior(σ= 2.18×10 -3-5.00×10 -5 S/cm, M s=3.7-16.6 m 2·A/kg, H c=8 805.2-9 133.1 A/m) were prepared by a chemical modification-...Nanocomposites of PAn-DBSA/γ-Fe 2O 3 with electrical and ferromagnetic behavior(σ= 2.18×10 -3-5.00×10 -5 S/cm, M s=3.7-16.6 m 2·A/kg, H c=8 805.2-9 133.1 A/m) were prepared by a chemical modification-redoping method in a neutral medium. The products were characterized by TEM, XRD, UV-Vis, four-probe method, and magnetometer. The results indicate that the electrical and magnetic properties of the nanocomposites strongly depend on γ-Fe 2O 3 content. With the increase of γ-Fe 2O 3 content, the electrical conductivity is decreased and saturation magnetization is increased.展开更多
The dynamic wetting of water spreading on TiO 2 and TiO 2 SiO 2 films prepared by sol gel method and subsequently treated by air plasma and UV irradiation was investigated. Water completely spread on TiO 2 surface wit...The dynamic wetting of water spreading on TiO 2 and TiO 2 SiO 2 films prepared by sol gel method and subsequently treated by air plasma and UV irradiation was investigated. Water completely spread on TiO 2 surface within 3 s and its dynamic contact angles can be expressed by a power law θ d= k(t+a) -n with the n value 0.98. Less than 50%(molar fraction) SiO 2 addition can accelerate the dynamic water spreading rate on the TiO 2 SiO 2 films and the optimum molar fraction of SiO 2 amount corresponding to as annealed, air plasma, and UV irradiation treatment process is 15%, 10% and 20%, respectively.展开更多
用紫外 -可见吸收光谱、动态光散射与透射电镜研究紫外光辐射对 Ti O2 溶胶的影响 ,结果表明 ,光辐射使 Ti O2 溶胶在可见光区的吸收减少 ,紫外区吸收增加 ,吸收带隙增大 .与非光辐射的 Ti O2 溶胶粒子相比 ,光辐射使 Ti O2 溶胶粒子分...用紫外 -可见吸收光谱、动态光散射与透射电镜研究紫外光辐射对 Ti O2 溶胶的影响 ,结果表明 ,光辐射使 Ti O2 溶胶在可见光区的吸收减少 ,紫外区吸收增加 ,吸收带隙增大 .与非光辐射的 Ti O2 溶胶粒子相比 ,光辐射使 Ti O2 溶胶粒子分布均匀且平均粒径减小 ,提高了 Ti O2展开更多
Ti O2 films and N- doped Ti O2 films were prepared by magnetron sputtering methodology.The films were illuminated at365 nm for5— 2 0 min followed by the measurementof contactangles and surface photovoltage spectrosco...Ti O2 films and N- doped Ti O2 films were prepared by magnetron sputtering methodology.The films were illuminated at365 nm for5— 2 0 min followed by the measurementof contactangles and surface photovoltage spectroscopy.The results show thatfor n- type Ti O2 film,UV illumination treatment can in- crease the photovoltage,while for p- type Ti O2 film,such treatment can decreases the photovoltage.The photovoltaic changing was explained by Ti— OH group increasing due to photo- induced hydrophility.For n- type Ti O2 film,Ti— OH groups can increase the photo- induced charge separation and thus iucrease the photovoltage;for p- type Ti O2 film,Ti—OH groups decrease the photo- induced charge separation and thus decrease the photovoltage.展开更多
Polyaniline-7,7,8,8-tetracyanoquinodimethanane (PANI-TCNQ) complex thin films were successfully grown by vacuum evaporation.The atomic force microscope (AFM) images showed that the rough PANI film is loosely construct...Polyaniline-7,7,8,8-tetracyanoquinodimethanane (PANI-TCNQ) complex thin films were successfully grown by vacuum evaporation.The atomic force microscope (AFM) images showed that the rough PANI film is loosely constructed from many large spherical clusters.While the PANI-TCNQ film,closely packed with many small powder-like clusters,is densified and flat.The microstructure of the complex film can be made better by vacuum annealing.Charge transfer,from PANI chains to TCNQ molecule,was observed from Fourier transfer infrared spectrum of the complex film.The charge transfer can be intensified by vacuum annealing.The relationship between the microstructure and the electric properties of the film was discussed.展开更多
文摘The post structure aligned carbon nanotube(ACNT) film was prepared by CVD. it was a ultra-hydrophobic film with a higher contact angle(166°) and lower sliding angle(less than 3°). The post structure ACNT film showed discrete pillar composed of carbon nanotubes, these pillar formed microstructure in the film, which affected both the contact angle and the sliding angle.
文摘The porous aligned carbon nanotube(ACNTs) films prepared by pyrolysis of metal phthalocyanines show an ultrahydrophobic property. The contact angle for water of the films is 161°. The films modified with fluoroalkylsilane show a better hydrophobic property. The contact angle for water of the modified films is as high as 172°. The alignment structure of the films and large fraction of air on the films are considered to be responsible for the ultrahydrophobic property.
文摘Nanocomposites of PAn-DBSA/γ-Fe 2O 3 with electrical and ferromagnetic behavior(σ= 2.18×10 -3-5.00×10 -5 S/cm, M s=3.7-16.6 m 2·A/kg, H c=8 805.2-9 133.1 A/m) were prepared by a chemical modification-redoping method in a neutral medium. The products were characterized by TEM, XRD, UV-Vis, four-probe method, and magnetometer. The results indicate that the electrical and magnetic properties of the nanocomposites strongly depend on γ-Fe 2O 3 content. With the increase of γ-Fe 2O 3 content, the electrical conductivity is decreased and saturation magnetization is increased.
文摘The dynamic wetting of water spreading on TiO 2 and TiO 2 SiO 2 films prepared by sol gel method and subsequently treated by air plasma and UV irradiation was investigated. Water completely spread on TiO 2 surface within 3 s and its dynamic contact angles can be expressed by a power law θ d= k(t+a) -n with the n value 0.98. Less than 50%(molar fraction) SiO 2 addition can accelerate the dynamic water spreading rate on the TiO 2 SiO 2 films and the optimum molar fraction of SiO 2 amount corresponding to as annealed, air plasma, and UV irradiation treatment process is 15%, 10% and 20%, respectively.
文摘用紫外 -可见吸收光谱、动态光散射与透射电镜研究紫外光辐射对 Ti O2 溶胶的影响 ,结果表明 ,光辐射使 Ti O2 溶胶在可见光区的吸收减少 ,紫外区吸收增加 ,吸收带隙增大 .与非光辐射的 Ti O2 溶胶粒子相比 ,光辐射使 Ti O2 溶胶粒子分布均匀且平均粒径减小 ,提高了 Ti O2
文摘Ti O2 films and N- doped Ti O2 films were prepared by magnetron sputtering methodology.The films were illuminated at365 nm for5— 2 0 min followed by the measurementof contactangles and surface photovoltage spectroscopy.The results show thatfor n- type Ti O2 film,UV illumination treatment can in- crease the photovoltage,while for p- type Ti O2 film,such treatment can decreases the photovoltage.The photovoltaic changing was explained by Ti— OH group increasing due to photo- induced hydrophility.For n- type Ti O2 film,Ti— OH groups can increase the photo- induced charge separation and thus iucrease the photovoltage;for p- type Ti O2 film,Ti—OH groups decrease the photo- induced charge separation and thus decrease the photovoltage.
文摘Polyaniline-7,7,8,8-tetracyanoquinodimethanane (PANI-TCNQ) complex thin films were successfully grown by vacuum evaporation.The atomic force microscope (AFM) images showed that the rough PANI film is loosely constructed from many large spherical clusters.While the PANI-TCNQ film,closely packed with many small powder-like clusters,is densified and flat.The microstructure of the complex film can be made better by vacuum annealing.Charge transfer,from PANI chains to TCNQ molecule,was observed from Fourier transfer infrared spectrum of the complex film.The charge transfer can be intensified by vacuum annealing.The relationship between the microstructure and the electric properties of the film was discussed.
