The TiO 2 nanoparticle thin films have been sensitized in situ with CdS nanoparticles. The SPS measurement showed that large surface state density was present on the TiO 2 nanoparticles and the surface state can be ef...The TiO 2 nanoparticle thin films have been sensitized in situ with CdS nanoparticles. The SPS measurement showed that large surface state density was present on the TiO 2 nanoparticles and the surface state can be efficiently decreased by sensitization as well as selecting suitable heat treatment. Both the photocurrent response and the charge recombination kinetics in TiO 2 thin films were strongly influenced by trapping/detrapping of surface states. The slow photocurrent response of TiO 2 nanoparticulate thin films upon the illumination was attributed to the trap saturation effects. The semiconductor sensitization made the slow photoresponse disappeared and the steadystate photocurrent value increased drastically, which suggested that the sensitization of TiO 2 thin films with CdS could get a better charge separation and provide a simple alternative to minimize the effect of surface state on the photocurrent response.展开更多
CdS nanoparticles were prepared and modified with mercaptoacetic acid. The functionalized nanoparticles were water soluble and biocompatible and used as fluorescence probe in the determination of Human serum albumin(H...CdS nanoparticles were prepared and modified with mercaptoacetic acid. The functionalized nanoparticles were water soluble and biocompatible and used as fluorescence probe in the determination of Human serum albumin(HSA) and γ globulin( γ G). Under the optimal conditions, linear relationships were found between the enhanced intensity of fluorescence and the concentration of protein in the range of 0 2 and 3 5 μg/mL for HSA and 0 2 and 11 0 μg/mL for γ G. The limits of detection were 0 09 μg/mL for HSA and 0 18 μg/mL for γ G.展开更多
A new synthetical method for nanomaterials was developed, and the semiconductor nanocrystalline CdS was fabricated through controlling of the living biomembrane in bean sprouts. The results indicated that approximatel...A new synthetical method for nanomaterials was developed, and the semiconductor nanocrystalline CdS was fabricated through controlling of the living biomembrane in bean sprouts. The results indicated that approximately spherical CdS particles about 5.1 nm, which has a cubic zinc blende structure with a cell constant a =0.581 8 nm, could be formed after the bean sprouts were successively soaked in 0 1 mol·L -1 Na 2S and 0 1 mol·L -1 CdCl 2 for 24 h. In addition, the tentative research for the reaction mechanism has been carried out. [WT5HZ]展开更多
文摘The TiO 2 nanoparticle thin films have been sensitized in situ with CdS nanoparticles. The SPS measurement showed that large surface state density was present on the TiO 2 nanoparticles and the surface state can be efficiently decreased by sensitization as well as selecting suitable heat treatment. Both the photocurrent response and the charge recombination kinetics in TiO 2 thin films were strongly influenced by trapping/detrapping of surface states. The slow photocurrent response of TiO 2 nanoparticulate thin films upon the illumination was attributed to the trap saturation effects. The semiconductor sensitization made the slow photoresponse disappeared and the steadystate photocurrent value increased drastically, which suggested that the sensitization of TiO 2 thin films with CdS could get a better charge separation and provide a simple alternative to minimize the effect of surface state on the photocurrent response.
文摘CdS nanoparticles were prepared and modified with mercaptoacetic acid. The functionalized nanoparticles were water soluble and biocompatible and used as fluorescence probe in the determination of Human serum albumin(HSA) and γ globulin( γ G). Under the optimal conditions, linear relationships were found between the enhanced intensity of fluorescence and the concentration of protein in the range of 0 2 and 3 5 μg/mL for HSA and 0 2 and 11 0 μg/mL for γ G. The limits of detection were 0 09 μg/mL for HSA and 0 18 μg/mL for γ G.
文摘A new synthetical method for nanomaterials was developed, and the semiconductor nanocrystalline CdS was fabricated through controlling of the living biomembrane in bean sprouts. The results indicated that approximately spherical CdS particles about 5.1 nm, which has a cubic zinc blende structure with a cell constant a =0.581 8 nm, could be formed after the bean sprouts were successively soaked in 0 1 mol·L -1 Na 2S and 0 1 mol·L -1 CdCl 2 for 24 h. In addition, the tentative research for the reaction mechanism has been carried out. [WT5HZ]
