稀土纳米金对银染效果的影响及其UV-Vis吸收光谱

制备了La，Ce，Nd，Sm，Eu，Gd，Dy微粒和纳米金，分别用La，Ce，Nd，Sm，Eu，Gd，Dy微粒替代部分的纳米金，研究了La-Au，Ce-Au，Nd-Au，Sm-Au，Eu-Au，Gd-Au，Dy-Au微粒分别对银染效果的影响及其紫外可见(UV-Vis)吸收光谱。与纳米金相比，La-Au，Ce-Au，Nd-Au，Sm-Au，Eu-Au，Gd-Au，Dy-Au微粒可延长银染后的斑点持续的时间，其中Nd-Au微粒的效果最好，斑点持续的时间为30 min，是纳米金的2.7倍;可大幅度加深斑点的颜色，其中Nd-Au，Sm-Au微粒的效果最好，用Nd微粒替代部分的纳米金，纳米金用量降低了80%，但还能提高银染法的灵敏度。在200～800 nm范围，La，Ce，Nd，Sm，Eu，Gd，Dy微粒和纳米金溶液的UV-Vis吸收光谱只有一个吸收峰，λ_max分别为275，277，276，276，278，277，278和521 nm;La-Au，Ce-Au，Nd-Au，Sm-Au，Eu-Au，Gd-Au，Dy-Au微粒混合液的UV-Vis吸收光谱有两个吸收峰，λ_max(RE)和λ_max(Au)分别为276和522 nm，276和522 nm，276和523 nm，276和523 nm，276和522 nm，276和522 nm，276和523 nm，纳米金和La微粒的吸收峰的波长发生了红移，Ce，Eu，Gd，Dy微粒的吸收峰的波长发生了蓝移，Nd，Sm微粒的吸收峰的波长不变，纳米金与稀土微粒可能有相互作用。

Effect of REAu on Silver Staining Results and Their UV-Vis Absorption Spectra

La, Ce, Nd, Sm, Eu, Gd, Dy particles and gold nanoparticles were prepared. Effects of La-Au, Ce-Au, Nd-Au, Sm-Au, Eu-Au, Gd-Au and Dy-Au particles on silver staining results were studied, respectively, and UV-Vis absorption spectra of La-Au, Ce-Au, Nd-Au, Sm-Au, Eu-Au, Gd-Au and Dy-Au particles were studied. Times and colors of sports with La-Au, Ce-Au, Nd-Au, Sm-Au, Eu-Au, Gd-Au, Dy-Au particles are longer and darker than that of with gold nanoparticles, respectively. The time of sport with Nd-Au particles is as long as 30 min, which is 2.7 times as long as with gold nanoparticles. Although amount of gold nanoparticles reduced 80%, the color of sport with Nd-Au particles is darker than that of with gold nanoparticles. In 200.00～800.00 nm, La, Ce, Nd, Sm, Eu, Gd, Dy particles and gold nanoparticles has one absorption peak, respectively, and λ_max is 275, 277, 276, 276, 278, 277, 278 and 521 nm, respectively. La-Au, Ce-Au, Nd-Au, Sm-Au, Eu-Au, Gd-Au, Dy-Au particles have two absorption peaks, respectively, λ_max(RE) and λ_max(Au) are 276 and 522 nm, 276 and 522 nm, 276 and 523 nm, 276 and 523 nm, 276 and 522 nm, 276 and 522 nm, 276 and 523 nm, respectively. λ_max of Au nanoparticles and La particles occurs red moving respectively, and λ_max of Ce, Eu, Gd and Dy particles occurs blue moving, respectively, and λ_max of Nd and Sm particles is constant respectively. Rare earths particles and gold nanoparticles may have interaction, respectively.