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Crystal Growth: Principles of Crystallization

Crystal Growth: Principles of Crystallization

Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent...

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Updated: Jan 12, 2026

Microbubble Fabrication of Concave-porosity PDMS Beads

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Published on: December 15, 2015

可充气的多孔有机晶体

Alexios I Vicatos¹, Leigh Loots¹, Gundo Mathada¹

¹Department of Chemistry and Polymer Science, University of Stellenbosch, Stellenbosch, South Africa.

Nature materials

|November 3, 2025

概括

这项研究详细介绍了一种多孔分子晶体,它随着气体的吸收和释放而显著膨胀和收缩. 这种可控制的尺寸变化高达10%,为在压力下运行的新型机械设备提供了潜力.

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Published on: December 15, 2015

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科学领域:

材料科学材料科学材料科学
晶体学晶体学是指结晶学.
纳米技术纳米技术

背景情况:

宏观的固体尺寸与温度和压力等环境因素相关.
这种关系可以在分子层面上理解.
可控的刺激转化为机械能量是先进设备的关键,特别是在极端条件下.

研究的目的:

描述一个多孔分子晶体中单向膨胀和收缩.
为了获得关于宏观维度变化的分子层面见解.
为了将气体压力与晶体膨胀相关联,并建模这种关系.

主要方法:

在现场进行结构分析.
摄影微波技术. 摄影微波技术. 摄影微波技术.
气体吸附/脱附实验. 气体吸附/脱附实验. 气体吸附/脱附实验. 气体吸附/脱附实验.

主要成果:

观测到一个针状多孔分子晶体的主要单向膨胀和收缩.
实现了高达10%的宏观线性膨胀,与气体特定压力相关联.
证明气体诱导的线性膨胀可以用Langmuir-Freundlich方程来建模.

结论:

该研究提供了对多孔晶体宏观维度变化的分子层次理解.
观察到的气体反应膨胀是可预测和可量化的.
这种现象在设计新型机械或电机械设备方面具有潜在的应用.