材料科学
吸收(声学)
聚合物
宽带
可见光谱
圆二色性
热解
纳米技术
光电子学
结晶学
化学
光学
有机化学
物理
复合材料
作者
Kenji Hirai,Bongjun Yeom,Kazuki Sada
出处
期刊:ACS Nano
[American Chemical Society]
日期:2017-04-11
卷期号:11 (6): 5309-5317
被引量:16
标识
DOI:10.1021/acsnano.7b00103
摘要
Fabrication of chiroptical materials with broadband response in the visible light region is vital to fully realize their potential applications. One way to achieve broadband chiroptical activity is to fabricate chiral nanostructures from materials that exhibit broadband absorption in the visible light region. However, the compounds used for chiroptical materials have predominantly been limited to materials with narrowband spectral response. Here, we synthesize Ag2S-based nanohelices derived from helical coordination polymers. The right- and left-handed coordination helices used as precursors are prepared from l- and d-glutathione with Ag+ and a small amount of Cu2+. The pyrolysis of the coordination helices yields right- and left-handed helices of Cu0.12Ag1.94S/C, which exhibit chiroptical activity spanning the entire visible light region. Finite element method simulations substantiate that the broadband chiroptical activity is attributed to synergistic broadband light absorption and light scattering. Furthermore, another series of Cu0.10Ag1.90S/C nanohelices are synthesized by choosing the l- or d-Glu-Cys as starting materials. The pitch length of nanohelicies is controlled by changing the peptides, which alters their chiroptical properties. The pyrolysis of coordination helices enables one to fabricate helical Ag2S-based materials that enable broadband chiroptical activity but have not been explored owing to the lack of synthetic routes.
科研通智能强力驱动
Strongly Powered by AbleSci AI