Leica Microsystems: 显微镜科学与教学知识中心

显微镜科学与教学知识中心

徕卡显微系统的知识库提供有关显微镜学科的科学研究和教学材料。内容旨在对显微镜初学者、有经验的显微镜操作实践者和使用显微镜的科学家在他们的日常工作和实验有所帮助。这里有探索交互式教程和应用笔记，你可以找到你需要的显微镜的基础知识以及前沿技术——快来加入徕卡显微知识社区，分享您的专业知识！

Macroscale to Nanoscale Pore Analysis of Shale and Carbonate Rocks

Physical porosity in rocks, like shale and carbonate, has a large effect on the their storage capacity. The pore geometries also affect their permeability. Imaging the visible pore space provides…

Porous Ceramics - Sample Preparation for SEM

Application Note for Leica EM RES102 - Ceramic membrane filters with pore sizes down to a few nanometres must be investigated in cross-section with regard to the structure of the pores. The smallest…

Paper Samples - Sample Preparation for SEM

Application Note for Leica EM RES102 - A coated paper sample has been prepared with ion beam slope cutting in order to test the procedure with regard to its applicability. With the use of ion beam…

细菌实验方案 - 对大肠杆菌样本实施临界点干燥以进行SEM分析

徕卡EM CPD300的应用文档 - 生命科学研究,对大肠杆菌样本实施临界点干燥后，进行铂/钯金属镀膜，后用SEM拍摄微观形貌,将样本放入一个滤盘中（孔径：16-40μm），置入滤盘和多孔样品架内。在含有培养基的琼脂上培养真菌和细菌，为期3天。选取部分细菌菌落。

Ion Beam Polishing of Sample Surfaces - Sample Preparation for SEM

Application Note for Leica EM RES102 - Ion milling can be used to reduce the roughness of sample surfaces. Small angles less than 6° with respect to the sample surface are necessary. The high voltage…

Human Blood Cells Protocol

Application Note for Leica EM CPD300 - Life Science Research. Species: Human (Homo sapiens) Critical point drying of human blood with subsequent platinum / palladium coating and SEM analysis.

Improvement of Metallic Thin Films for HR-SEM by Using DC Magnetron Sputter Coater

Preparation techniques, like several kinds of coating methods play an important role for high resolution scanning electron microscopy (HR-SEM). Nonconductive sample like biological and synthetic…

冷冻断裂与冷冻蚀刻基础介绍

冷冻断裂是一种将冰冻样本劈裂以露出其内部结构的技术。冷冻蚀刻是指让样本表面的冰在真空中升华，以便露出原本无法观察到的断裂面细节。金属/碳复合镀膜能够实现样本在SEM（块面）或TEM（复型）中的成像，主要用于研究如细胞器、细胞膜，细胞层和乳胶。这项技术传统上用于生物学应用，但现在逐渐在物理学和材料科学中展现出重要意义。近年来，研究人员通过冷冻断裂电子显微镜，尤其是冷冻复型免疫标记（FRIL），对膜蛋…

临界点干燥简要介绍

临界点干燥程序是在SEM应用中对精密样本实施干燥的有效方法。临界点干燥保全了样本的表面结构，否则，当样本从液态变为气态时可能会因为表面张力而导致表面结构受破坏。在过去，临界点干燥是一个耗时的过程，由于手动操作太多造成了样本的重现性较低。许多生物样本通常在干燥前通过固定和脱水制备，干燥后进行金、铂或钯等金属镀膜使其表面导电，这样才能方便开展SEM分析。