Preparation of Pd nanoparticles with Pd-imidazole complexes by the Langmuir –Blodgett technique

• Main Authors: Jhen-Yu Yang, 楊振宇
• Other Authors: Y.-S Lo
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/70042798821789131218

碩士 === 國立東華大學 === 化學系 === 95 === [Pd(imC16H33)2Cl2] and [Pd(imC16(2-OH))2Cl2] are both amphiphilic complexes. Molecular ordering of Pd(II)-imidazole complexes upon mechanical compression at the air/water interface is studied by surface pressure-area (π-A) isotherms and Brewster angle microscope (BAM). The repeatability of the isotherms and the stability of the Langmuir films are examined by successive compression–expansion cycles. The monolayers at the air/water interface are transferred onto solid substrate using vertical dipping Langmuir-Blodgett (LB) technique. The LB films are comprised of monolayers or multilayers of Pd(II)-imidazole complexes, which are precisely controlled by the number of deposition cycles and the transfer ratio. It is found that after combustion of the LB films of [Pd(imC16(2-OH))2Cl2] at or below 350°C, fairly uniform and well dispersed Pd nanoparticles are formed on the solid substrate. The relationships between particle size and parameters including combustion temperature, combustion time, and the number of layers of LB films are explored.