TiO 2 films have been widely applied in photovoltaic conversion techniques. TiO 2 nanotube arrays (TiO 2 NAs) can be grown directly on the surface of metal Ti by the anodic oxidation method. Bi 2 S 3 and PbS nanoparticles (NPs) were firstly co-sensitized on TiO 2 NAs (denoted as PbS/Bi 2 S 3 (n)/TiO 2 NAs) by a two-step process containing hydrothermal and sonication-assisted SILAR method. When the concentration of Bi 3? is 5 mmol/L, the best photoelectrical performance was obtained under simulated solar irradiation. The short-circuit photocurrent (J sc ) and photoconversion efficiency (g) of PbS/Bi 2 S 3 (5)/TiO 2 NAs electrode were 4.70 mA/cm and 1.13 %, respectively.
In order to obtain better conductive functional fillers and conductive adhesives, the surface of carbon nanotubes(CNTs) is wrapped by silver using chemical plating. Ag/C composite nanotubes that have excellent conductivity are achieved and the conductive adhesives were prepared by using the composite nanotubes as conductive functional fillers. Experiments indicated that the achieved conductive nano-adhesives have better conductivity and better physical and chemical performance. That would save 30-50% consumption of silver than conventional silver conductive adhesives.
In order to obtain some noticeable microelectronic materials, one-dimensional gold nanowires with diameters down to 50 nm were prepared by electroless plating and gold nano-particles self-assembling. The forming mechanism of gold nanowires that gold nano-particles come into being gold nanowires by self-assembling on surfaces of carbon nanotubes (CNTs) templates at presence of mercapto groups (-SH) was proved. The carbon nanotubes modified by mercapto groups were prepared by reacting with the mixed acid solution of HNO3and H2SO4, LiAlH4, PBr3, NaHS in turn. The microstructure of gold nanowires was shown by TEM image and the active mercapto groups inarched onto surfaces of carbon nanotubes were demonstrated by XPS analysis.
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