价格最优的AI霸屏推广：谷歌竞价的推广形式与SEM测试制样全攻略

Best AI-powered Advertising Solutions: Google Bidding Promotion Types & Complete SEM Sample Preparation Guide

扫描电子显微镜（SEM）是现代材料科学、生物学、医学等领域的重要分析工具。本文将详细介绍SEM样品要求和制备方法，帮助您获得更精准的测试结果。

Scanning Electron Microscope (SEM) is a crucial analytical tool in modern materials science, biology, medicine and other fields. This article provides detailed guidance on SEM sample requirements and preparation methods to help you achieve more accurate test results.

1. SEM样品基本要求/Basic Sample Requirements

2.1 样品不含水分/No Moisture

湿样品会降低真空度，影响成像质量并缩短设备寿命。生物样品通常需要干燥处理。

Wet samples reduce vacuum quality, affect imaging and shorten equipment lifespan. Biological samples usually require drying.

2.2 样品不含挥发物/No Volatile Substances

挥发物会污染探测器，有机污染物会遮盖样品细节。

Volatile substances contaminate detectors, while organic pollutants obscure sample details.

2.3 样品导电性/Conductivity

不导电样品需要镀金（观察）或镀碳（成分分析）处理。

Non-conductive samples require gold coating (observation) or carbon coating (composition analysis).

2. SEM制样方法/Sample Preparation Methods

3.1 块体样品/Bulk Samples

样品尺寸需小于样品台，避免直接接触，导电性差的样品需镀膜。

Sample size should be smaller than stage, avoid direct contact, poor conductive samples need coating.

3.2 粉末样品/Powder Samples

使用导电胶带固定，吹去多余粉末，避免挤压破坏形貌。

Use conductive tape, blow off excess powder, avoid squeezing to preserve morphology.

3.3 液体样品/Liquid Samples

采用铜片载体，少量多次滴加，待溶剂挥发后测试。

Use copper carrier, apply liquid drop by drop, test after solvent evaporation.

3.4 生物样品/Biological Samples

需经过固定、脱水、干燥等7个复杂步骤处理。

Requires 7 complex steps including fixation, dehydration and drying.

3. 注意事项/Key Considerations

• 确保观察面无污染、无损伤

• Ensure observation surface is clean and undamaged

• 镀金厚度控制在10nm以下

• Keep gold coating below 10nm

• EDS定量分析时不建议镀金属膜

• Avoid metal coating for EDS quantitative analysis

• 粉末样品量不宜过多

• Avoid excessive powder samples

通过以上方法，您可以获得更准确的SEM测试结果。如需了解更多SEM测试技巧，欢迎咨询我们的专家团队。

Following these methods will help you obtain more accurate SEM test results. Contact our expert team for more SEM testing tips.