Probing polymers with single fluorescent molecules

被引：38

作者：

Tomczak, N

Vallée, RAL

van Dijk, EMHP

García-Parajó, M

Kuipers, L

van Hulst, NF

Vancso, GJ

机构：

[1] Univ Twente, Appl Opt Grp, Fac Sci & Technol, MESA,Inst Nanotechnol, NL-7500 AE Enschede, Netherlands

[2] Univ Twente, Dept Mat Sci & Technol Polymers, Fac Sci & Technol, MESA,Inst Nanotechnol, NL-7500 AE Enschede, Netherlands

来源：

EUROPEAN POLYMER JOURNAL | 2004年 / 40卷 / 05期

关键词：

single molecules; fluorescence lifetime; rotational diffusion; heterogeneous dynamics;

D O I：

10.1016/j.eurpolymj.2004.01.045

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The use of single molecules to study local, nanoscale polymer dynamics is presented. Fluorescence lifetime fluctuations were used to extract the number of polymer segments (N-s) taking part in the rearranging volume around the probe molecule below the glass transition temperature. N-s was dependent on the temperature and it decreased with increasing temperature. Above the glass transition, rotational motion of single molecules was followed in time and typical time-scales of the rotational diffusion were extracted. These two approaches allowed us to obtain non-averaged information about the heterogeneous dynamics present in polymer systems, on the nanoscale, above and below glass transition temperatures. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：1001 / 1011

页数：11

共 80 条

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