NSF-DFG Confine: Spin-Probe-Enabled Sensing of Fluids in Confined Geometries and Interfaces

NSF-DFG Confine：利用自旋探针对受限几何形状和界面中的流体进行传感

基本信息

批准号：
2223461
负责人：
Carlos Meriles
金额：
$ 60万
依托单位：
CUNY City College
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2022
资助国家：
美国
起止时间：
2022-10-01 至 2025-09-30
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2223461&HistoricalAwards=false
关键词：
NSF DFG Confine Spin Probe

项目摘要

With support from the Chemical Measurement and Imaging Program (CMI) in the Division of Chemistry, Carlos Meriles of CUNY City College and Nicolas Giovambattista of CUNY Brooklyn College are using atomic defects near the surface of a host crystal as nanoscale probes to characterize the structure and motion of water molecules confined to extremely small spaces (at the nanometer scale). Strong confinement modifies water in ways that are central to technological applications, but the small sample dimensions and the heterogeneities of the confining surfaces makes it challenging for experimentalists to provide detailed information on the molecular behavior at the nanoscale. To mitigate these limitations, Dr. Meriles and his students are developing a sensing approach based on individual point defects in diamond that can serve as a detector of small amounts of liquids in general, and water, in particular. Dr. Giovambattista and his students are using computer simulations and theoretical modeling to help interpret the signals that come from these point-defect-aided measurements. Activities also include the exchange of graduates and postdocs between the US and collaborators at the University of Stuttgart in Germany, an initiative aimed at simultaneously enriching the professional training and networking opportunities of all participating students. Enabling this research program is the so-called nitrogen-vacancy (NV) center in diamond, a paramagnetic defect whose charge and spin states can be prepared and readout by all-optical means. The overarching goals revolve around two research thrusts: (i) The first one capitalizes on novel NV-based magnetic resonance spectroscopy methods to investigate water diffusion under variable confinement and surface hydrophobicity within ad-hoc nanostructures produced via 2D-material engineering; also part of this effort is the development of alternative sensing strategies adapted to heavy water, an area where activities include both experiments and path-integral molecular dynamics simulations. (ii) The second research thrust zeroes in on the use of external magnetic gradients, here leveraged to non-invasively probe molecular diffusion and image surface-induced order in confined water. Of special interest is the investigation of hydration at boundaries separating hydrophobic and hydrophilic sections of engineered substrates based on 2D materials. The results derived from this effort may prove relevant to various open problems of fundamental and practical importance, such as the interplay between nanoscale confinement and chemical reactivity, or the impact of confined water in biological processes such as ion flow in cell membranes.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

在化学测量和成像计划（CMI）的支持下，Cuny City College的Carlos Meriles和Cuny Brooklyn College的Nicolas Giovambattisa的Carlos Meriles正在使用纳米级探针的宿主晶体表面附近的原子缺陷，以将水分子的结构和运动表征为nonan space的结构和运动（在Nnnancules space）（在NNINAN中）（在Nonan space上）。强烈的限制会以对技术应用的核心方式修饰水，但是狭窄的样本维度和狭窄表面的异质性使实验者在纳米级分子行为提供详细信息的挑战。为了减轻这些局限性，Meriles博士和他的学生正在基于钻石中的个别点缺陷开发一种传感方法，该方法可以用作少量液体，尤其是水，尤其是水。 Giovambattista博士和他的学生正在使用计算机模拟和理论建模来解释这些点辅助辅助测量的信号。活动还包括美国与德国斯图加特大学合作者之间的毕业生和博士后交流，该计划旨在同时丰富所有参与学生的专业培训和网络机会。启用该研究计划是Diamond中所谓的氮呈（NV）中心，钻石是一种顺磁性缺陷，可以通过全光学手段来准备和读取其电荷和自旋状态。总体目标围绕两个研究推力：（i）第一个利用了新型的基于NV的磁共振光谱方法，以研究通过2D-材料工程产生的多个-HOC纳米结构内的可变限制和表面疏水性下的水扩散；这项工作的一部分也是开发适合重水的替代感测策略，该活动包括实验和路径综合分子动力学模拟。（ii）第二次研究对使用外部磁性梯度的使用，此处将其利用为非侵入性探针分子扩散和图像表面诱导的限制性序列。特别感兴趣的是研究基于2D材料的工程底物的边界的水合研究。从这项工作中得出的结果可能证明与基本和实际重要性的各种开放问题有关，例如纳米级约束和化学反应性之间的相互作用，或者在细胞膜中的离子流中受到的生物学过程的影响。该奖项颁发了NSF的法定任务和通过评估的支持，这反映了对经验的支持。