Development of Nanoelectrophoresis Cell for Studying the Surface Properties of Minerals in Hydrothermal Environments

开发用于研究水热环境中矿物表面性质的纳米电泳池

• 批准号: 0732559
• 负责人: Serguei Lvov
• 金额: $ 23.39万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0732559&HistoricalAwards=false
• 关键词: Development; Nanoelectrophoresis; Cell; Studying; Surface

The main goal of this initiative is to develop a reliable instrument for determining the zeta potential of nanoparticles under hydrothermal conditions up to 350oC. The proposed design is based on the flow-through principle applied to capillary electrophoresis, which, unlike autoclave technique, excludes prolonged contact of experimental solution with cell materials. Also the design will employ disposable components, which will facilitate replacement of degraded materials in order to maintain system efficiency and precision. In the proposed high-temperature nanoelectrophoresis cell, the particles will be observed through the pressure-tight sapphire windows using darkfield optical microscopy. The electrophoretic particle velocity will be measured using serial image analysis or the Laser Doppler technique. Another exceptional novelty of the proposed system will be the use of the high-temperature flow-through pH-sensing cell for in-situ pH monitoring. The implementation of the proposed instrument would significantly contribute to the techniques for mineral surface analysis. This effort is largely stimulated by the high interest from geoscientists and environmental scientists working in the areas of geochemistry, environmental kinetics, mineral synthesis, thermodynamics of natural hydrothermal systems, molecular modeling in heterophase systems, and engineering of geo-repositories. Development of the high-temperature nanoelectrophoresis instrument will enhance infrastructure for earth science research and education. Benefits to society will results from the further development of measures for environmental protection and remediation, more efficient use of mineral deposits, and possibly discovery of new applications of geo-materials.

这一倡议的主要目标是开发一种可靠的仪器，用于在高达350摄氏度的水热条件下测定纳米颗粒的Zeta电位。所提出的设计是基于应用于毛细管电泳法的流过原理，与高压灭菌技术不同，该原理排除了实验溶液与细胞材料的长时间接触。此外，该设计将采用一次性部件，这将有助于更换降解的材料，以保持系统的效率和精度。在所提出的高温纳米电泳池中，将使用暗场光学显微镜通过压力密闭的蓝宝石窗口观察到颗粒。将使用连续图像分析或激光多普勒技术来测量电泳粒子速度。拟议系统的另一项特殊创新是使用高温流动pH感应池进行现场pH监测。拟议文书的实施将大大促进矿物表面分析技术的发展。这一努力在很大程度上是由于在以下领域工作的地球科学家和环境科学家的高度兴趣：地球化学、环境动力学、矿物合成、天然热液系统的热力学、多相系统中的分子模拟和地质储存库工程。高温纳米电泳仪的开发将加强地球科学研究和教育的基础设施。环境保护和补救措施的进一步发展，更有效地利用矿藏，以及可能发现新的地质材料应用，都将给社会带来好处。