Interfacial ordering in aqueous solutions: X-ray scattering studies

水溶液中的界面有序性:X 射线散射研究

基本信息

  • 批准号:
    1612876
  • 负责人:
  • 金额:
    $ 49.87万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2016
  • 资助国家:
    美国
  • 起止时间:
    2016-06-01 至 2021-05-31
  • 项目状态:
    已结题

项目摘要

Nontechnical abstractIons dissolved in water determine the properties of colloids (including commercial products ranging from salad dressings to paint). The interface between an electrode and an ionic solution is a crucial part of batteries, supercapacitors and other devices. Surrounding ions affect the physical properties of membranes and modify the behavior of proteins and DNA. Understanding the structure and properties of ions at interfaces is crucial to extracting them from water, whether for desalinization, removal of lead, arsenic or radioactive elements from groundwater or wastewater, or increasing the supply or rare earth materials for modern electronics. All these systems and processes would benefit from a better nanoscale view of how ions actually arrange themselves near wet surfaces. This project uses synchrotron X-rays to look directly at how ions are arranged near wet surfaces, while varying the surface, the ion, the concentration, the temperature, etc. What is learned from this research will help verify or refute theoretical predictions, and may also ultimately help design systems with specific properties for practical applications. This project trains graduate students in an interdisciplinary environment and gives them experience in the use of synchrotron facilities. Project-related topics are being incorporated into undergraduate and graduate courses and web-disseminated teaching materials.Technical abstractA variety of novel and/or counterintuitive behaviors have been observed in aqueous solutions containing ions. For example, charged interfaces sometimes attract more counterions than simple electrostatics would predict ("charge inversion"). Though hydrophobic (nonpolar) surfaces repel water, they are thought to attract certain ions towards the interface. The effects of ions at interfaces and around macromolecules can be strongly ion-specific, e.g. different lanthanides behave very differently. Such effects are exploited, for example, in liquid-liquid separations processes used to extract lanthanides and actinides from solution, but the origins are not understood. These anomalous behaviors are likely to have structural origins. X-ray scattering studies of interfaces, where one side of the interface is a solution containing ions, are performed in this project. The goal is to characterize the distributions normal to the interfaces, and also to understand whether and under what conditions the ions order laterally to form condensed interfacial phases with modified properties. The project trains graduate students in an interdisciplinary environment and gives them experience in the use of synchrotron facilities. Liquids-related topics are being incorporated into undergraduate and graduate courses and web-disseminated teaching materials.
溶解在水中的离子决定了胶体的性质(包括从沙拉酱到油漆的商业产品)。电极和离子溶液之间的界面是电池、超级电容器和其他设备的关键部分。周围的离子影响膜的物理性质,并改变蛋白质和DNA的行为。了解界面离子的结构和性质对于从水中提取离子至关重要,无论是用于脱盐,从地下水或废水中去除铅,砷或放射性元素,还是增加现代电子产品的稀土材料供应。所有这些系统和过程都将受益于更好的纳米尺度视角,即离子如何在湿表面附近实际排列。 该项目使用同步加速器X射线直接观察离子如何在湿表面附近排列,同时改变表面,离子,浓度,温度等从这项研究中学到的知识将有助于验证或反驳理论预测,并最终帮助设计具有实际应用特定属性的系统。该项目在跨学科的环境中培养研究生,并使他们获得使用同步加速器设施的经验。与项目相关的主题正在纳入本科生和研究生课程和网络传播的教学材料。技术摘要在含有离子的水溶液中已经观察到各种新颖和/或违反直觉的行为。 例如,带电界面有时会吸引比简单静电学预测的更多的抗衡离子(“电荷反转”)。 虽然疏水(非极性)表面排斥水,但它们被认为会吸引某些离子朝向界面。离子在界面和大分子周围的作用可以是强烈的离子特异性的,例如不同的镧系元素表现得非常不同。例如,在用于从溶液中提取镧系元素和锕系元素的液-液分离过程中,利用了这种效应,但其起源尚不清楚。这些异常行为很可能有结构性的根源。 在这个项目中进行了界面的X射线散射研究,其中界面的一侧是含有离子的溶液。我们的目标是表征的分布正常的接口,也要了解是否和在什么条件下的离子横向订购,以形成凝聚的界面相与修改后的性能。 该项目在跨学科环境中培训研究生,并让他们获得使用同步加速器设施的经验。与液体有关的专题正在被纳入本科生和研究生课程以及网上传播的教学材料。

项目成果

期刊论文数量(3)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Electrostatic Origin of Element Selectivity during Rare Earth Adsorption
  • DOI:
    10.1103/physrevlett.122.058001
  • 发表时间:
    2019-02-08
  • 期刊:
  • 影响因子:
    8.6
  • 作者:
    Miller, Mitchell;Liang, Yihao;Dutta, Pulak
  • 通讯作者:
    Dutta, Pulak
Interfacial Density Profiles of Polar and Nonpolar Liquids at Hydrophobic Surfaces
疏水表面极性和非极性液体的界面密度分布
  • DOI:
    10.1021/acs.langmuir.9b03785
  • 发表时间:
    2020
  • 期刊:
  • 影响因子:
    3.9
  • 作者:
    Chu, Miaoqi;Miller, Mitchell;Dutta, Pulak
  • 通讯作者:
    Dutta, Pulak
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Pulak Dutta其他文献

Influence of molecular rigidity on interfacial ordering in diphenyl-based polysiloxane films
  • DOI:
    10.1016/j.polymer.2007.10.006
  • 发表时间:
    2007-11-16
  • 期刊:
  • 影响因子:
  • 作者:
    Guennadi Evmenenko;Sumit Kewalramani;Pulak Dutta
  • 通讯作者:
    Pulak Dutta
Mechanisms for species-selective oriented crystal growth at organic templates
  • DOI:
    10.1557/jmr.2007.0347
  • 发表时间:
    2007-10-01
  • 期刊:
  • 影响因子:
    2.900
  • 作者:
    Sumit Kewalramani;Kyungil Kim;Guennadi Evmenenko;Paul Zschack;Evguenia Karapetrova;Jianming Bai;Pulak Dutta
  • 通讯作者:
    Pulak Dutta
Surface-confined Core–shell Structures Based on Gold Nanoparticles and Metal–organic Networks † Chemcomm Communication
基于金纳米粒子和金属有机网络的表面限制核壳结构 † Chemcomm Communication
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Revital Kaminker;Pulak Dutta;A. Gulino;M. E. van der Boom
  • 通讯作者:
    M. E. van der Boom
Hydrothermal growth of vanadium pentoxide nanofibers on carbon nanofiber mat: An anodic material for solid-state asymmetric supercapacitors
  • DOI:
    10.1016/j.solidstatesciences.2024.107804
  • 发表时间:
    2025-02-01
  • 期刊:
  • 影响因子:
  • 作者:
    Baban Dey;Md Wasi Ahmad;Refat Al-Shannaq;Tahseen Kamal;SK Safdar Hossain;Pulak Dutta;Arup Choudhury;Duck-Joo Yang
  • 通讯作者:
    Duck-Joo Yang

Pulak Dutta的其他文献

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{{ truncateString('Pulak Dutta', 18)}}的其他基金

Ions at aqueous interfaces: X-ray fluorescence and scattering studies
水界面的离子:X 射线荧光和散射研究
  • 批准号:
    2004557
  • 财政年份:
    2020
  • 资助金额:
    $ 49.87万
  • 项目类别:
    Continuing Grant
Voltage-dependent interfacial structure and properties of room temperature ionic liquids: operando X-ray studies
室温离子液体的电压依赖性界面结构和性质:原位 X 射线研究
  • 批准号:
    1665255
  • 财政年份:
    2017
  • 资助金额:
    $ 49.87万
  • 项目类别:
    Standard Grant
Surface/interface order in liquids with electrostatic correlations: X-ray scattering studies
具有静电关联的液体中的表面/界面顺序:X 射线散射研究
  • 批准号:
    1309589
  • 财政年份:
    2013
  • 资助金额:
    $ 49.87万
  • 项目类别:
    Continuing Grant
Liquid Surfaces and Interfaces: X-ray Studies
液体表面和界面:X 射线研究
  • 批准号:
    1006432
  • 财政年份:
    2010
  • 资助金额:
    $ 49.87万
  • 项目类别:
    Continuing Grant
Surface Order in Dielectric Liquids
介电液体中的表面有序
  • 批准号:
    0705137
  • 财政年份:
    2007
  • 资助金额:
    $ 49.87万
  • 项目类别:
    Standard Grant
X-Ray Studies of Liquids Near Interfaces and in Thin Films
界面附近和薄膜中液体的 X 射线研究
  • 批准号:
    0305494
  • 财政年份:
    2003
  • 资助金额:
    $ 49.87万
  • 项目类别:
    Continuing Grant
X-Ray Studies of Liquids Near Interfaces and in Thin Films
界面附近和薄膜中液体的 X 射线研究
  • 批准号:
    9978597
  • 财政年份:
    1999
  • 资助金额:
    $ 49.87万
  • 项目类别:
    Continuing Grant
X-Ray Scattering Studies of Thin Liquid Films
液膜的 X 射线散射研究
  • 批准号:
    9624055
  • 财政年份:
    1996
  • 资助金额:
    $ 49.87万
  • 项目类别:
    Continuing Grant

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