期刊
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
卷 73, 期 5, 页码 637-640出版社
SPRINGER-VERLAG
DOI: 10.1007/s003390100984
关键词
-
Fibroin is the main component of silk and is expected to be used as a novel functional material in medicine and bioelectronics. The main secondary structures of this protein are of the randorn-coil and the beta -sheet types. In this study, we carried out laser-induced transformation of the secondary structure, from the random-coil type to the beta -sheet type, in solid fibroin films. We prepared two types of fibroin films with the random-coil structure. One is a fibroin film doped with a dye as a photosensitizer with a small amount (1 wt %), and the other is a neat fibroin film. The former was excited at 532 nm and the latter was excited at 266 nm. Irradiations were carried out with fluences much lower than each ablation threshold. The excitation of the dye at 532 nm did not affect the secondary structure of the random-coil type. By contrast. 266-nm laser irradiation. which excites tryptophan (an aminoacid residue) involved in fibroin, created the beta -sheet domain in the film. The structural transformation was revealed by infrared absorption spectroscopy and atomic force microscopy.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据