A Safe, Simple, and Facile Staining Method Using Polysiloxanes for High-Contrast Visualization of Gelator Aggregates by Transmission Electron Microscopy
作者:Kenji Hanabusa、Masashi Nakashima、Eriko Funatsu、Sachiyo Kishi、Masahiro Suzuki
DOI:10.1246/bcsj.20180072
日期:2018.7.15
The staining of TEM samples using Si atoms was investigated using aggregates of loose gels formed by twelve structurally different gelators in several solvents. Thirteen commercially available siloxanes were used as stains. TEM images of non-stained and OsO4-stained samples of molecular aggregates formed by the dodecamethylenediamide of N-methacryloyloxyethylaminocarbonyl-l-isoleucine in 1-propanol
使用由十二种结构不同的凝胶剂在几种溶剂中形成的松散凝胶的聚集体研究了使用 Si 原子对 TEM 样品的染色。使用十三种市售硅氧烷作为染色剂。由 N-甲基丙烯酰氧基乙基氨基羰基-l-异亮氨酸在 1-丙醇中形成的十二亚甲基二酰胺形成的分子聚集体的未染色和 OsO4 染色样品的 TEM 图像定义不清且对比度低。然而,甲基丙烯酰氧基丙基封端的聚二甲基硅氧烷 (S1) 染色样品的图像以非常清晰的细纤维束为特征。染色效果可以通过纤维的包裹、单根纤维的稳定和 S1 的增强来解释。发现超过 5 mg mL-1 的 S1 浓度是令人满意的对比度所必需的。S1 已成功应用于观察其他 11 种凝胶剂的聚集体。无论凝胶剂或溶剂极性如何,S1 都普遍用作聚集染色剂。染色效果明显...