纳米银粒子表面包覆分子共振吸收峰的红移现象

ABSORPTION REDSHIFT OF MOLECULES COVERED SILVER NANOPARTICLE SURFACE

本文首次发现了两种电性不同的染料分子若丹明6G及荧光素钠包覆纳米银粒子时，染料分子共振吸收峰的红移现象，以及产生红移的条件．前者只有在KC1、KBr、KI等电解质存在时才产生红移；而后者则无需这些电解质存在．其红移量分别为27um及13nm．并对产生红移的机理进行了讨论．

It was first discovered the res0nant absorpti0n redshift 0f molecules Rh 6 G' and sodiumfluorescence adsorbed on the surface 0f silver nanoparticle. The value 0f redshift were 27nm andl3nm,respectively. The shift for Ph6G appeared on1y in the case of adding the electrolytes Clai, Br-and I- in the system. But for molecule sodium fluorescence,the electrolytes had no effect on the shift.