论文标题
超薄聚合物膜中单分子的低温光谱动力学
Low temperature spectral dynamics of single molecules in ultrathin polymer films
论文作者
论文摘要
我们研究了在低温温度下嵌入无形聚合物聚合物聚合物聚合物聚合物聚合物聚合物的单荧光染料分子（5-100 nm）中的光谱动力学及其随膜厚度的变化。整体中明显的分子部分显示出与标准隧道模型不一致的行为：它们的光谱线会受到不可逆的光谱跳跃，连续变化和线宽或跳跃速率的混乱变化。在比100 nm的薄膜薄中，“非标准”光谱行为的发生随着固定激发强度下的样品厚度降低而增加。另外，它还随激光强度增加。
We studied the spectral dynamics of single fluorescent dye molecules embedded in ultrathin films (5 - 100 nm) of the amorphous polymer polyisobutylene at cryogenic temperatures and its variation with film thickness. Noticeable portion of molecules in the ensemble show a behavior which is inconsistent with the standard tunneling model: Their spectral lines are subject to irreversible spectral jumps, continuous shifting, and abrupt chaotic changes of the linewidth or jumping rate. In films thinner than 100 nm, the occurrence of "non-standard" spectral behavior increases with decreasing sample thickness at fixed excitation intensity. In addition, it also increases with laser intensity.
