The journal Science in China Series B:Chemistry published 11 and 37 papers in polymer fields in 2008 and 2009,respectively,leading to a percentage increase of 236% and thereby a great historic breakthrough of the jour...The journal Science in China Series B:Chemistry published 11 and 37 papers in polymer fields in 2008 and 2009,respectively,leading to a percentage increase of 236% and thereby a great historic breakthrough of the journal.These papers mainly focus on three fields:(1) polymer synthesis,(2) functional polymer materials and (3) biomedical polymers.Several research groups published a series of papers in Science in China Series B:Chemistry and detailedly introduced their works in the related fields.展开更多
Azobenzene polymer films doped with and without Ag nanoparticles are prepared. The photoinduced reorientation process is investigated by using an Nd：YVO4 pump beam at 532 nm and a low semiconductor laser beam at 650 ...Azobenzene polymer films doped with and without Ag nanoparticles are prepared. The photoinduced reorientation process is investigated by using an Nd：YVO4 pump beam at 532 nm and a low semiconductor laser beam at 650 nm. The reorientation rate of azo polymer films is enhanced in the presence of Ag nanoparticles, and the rate of the azo polymer film with Ag concentration of 2.2 μg/ml is larger than that of the azo polymer films with Ag concentrations of 1.1 μg/ml and 4.4 μg/ml. The third-order nonlinear optical properties of the Ag/azo composite film are obtained by the Z-scan technique at a wavelength of 532 nm, and the measured nonlinear refractive index is 9.258×10-9 esu. It is shown that the main mechanisms involved in the large nonlinear optical responses come from the local field enhancement of Ag nanoparticles and the nonlinear effect of the azo polymer matrix.展开更多
文摘The journal Science in China Series B:Chemistry published 11 and 37 papers in polymer fields in 2008 and 2009,respectively,leading to a percentage increase of 236% and thereby a great historic breakthrough of the journal.These papers mainly focus on three fields:(1) polymer synthesis,(2) functional polymer materials and (3) biomedical polymers.Several research groups published a series of papers in Science in China Series B:Chemistry and detailedly introduced their works in the related fields.
文摘Azobenzene polymer films doped with and without Ag nanoparticles are prepared. The photoinduced reorientation process is investigated by using an Nd：YVO4 pump beam at 532 nm and a low semiconductor laser beam at 650 nm. The reorientation rate of azo polymer films is enhanced in the presence of Ag nanoparticles, and the rate of the azo polymer film with Ag concentration of 2.2 μg/ml is larger than that of the azo polymer films with Ag concentrations of 1.1 μg/ml and 4.4 μg/ml. The third-order nonlinear optical properties of the Ag/azo composite film are obtained by the Z-scan technique at a wavelength of 532 nm, and the measured nonlinear refractive index is 9.258×10-9 esu. It is shown that the main mechanisms involved in the large nonlinear optical responses come from the local field enhancement of Ag nanoparticles and the nonlinear effect of the azo polymer matrix.
