單分子量測技術近年來受到廣泛的重視與應用，尤其在生物分子與螢光分子的研究上。范文祥博士致力於共軛高分子發光機制的研究，其主要結合單分子探測與光譜學。本文主要介紹范老師在此一領域的重要貢獻，以及共焦顯微術操作上的基本概念。

The last decade has seen the widespread development and application of single-molecule detection techniqu肘， especially in the research of biomolecules and fluorescent polymers. Dr. Wunshain Fann played a key role in this area， developing sophisticated instruments for single molecule spectroscopy in order to understand and elucidate the underlying mechanisms of luminescent conjugated polymer photo-physics. Here we introduce this instrumentation and summarize the picture of conjugated polymers resulting from the research of Dr. Fann's group.