权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Wafer-Scale Manufacturing of Ultrathin Nanoporous Transition Metal Dichalcogenide Membranes Using Chemical Etching for Water Purification and Other Applications

使用化学蚀刻进行水净化和其他应用的超薄纳米多孔过渡金属二硫属化物膜的晶圆级制造

基本信息

批准号：
2002477
负责人：
Marija Drndic
金额：
$ 64.19万
依托单位：
University of Pennsylvania
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2020
资助国家：
美国
起止时间：
2020-07-01 至 2024-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2002477&HistoricalAwards=false
关键词：
Wafer Scale Manufacturing Ultrathin Nanoporous

项目摘要

This advanced manufacturing grant supports research in novel ultrathin membranes for efficient water purification. This work focuses on large-area manufacturing of ultra-thin transition metal dichalcogenide membranes to improve the precision of water filtration and treatment. This project creates new fundamental knowledge through the understanding of the mechanisms of water molecule and ion motion at atomic scales in these improved membranes. An important motivation for decreasing the membrane thickness is that it leads to increased water fluxes. The membranes are made by chemical vapor deposition of transition metal dichalcogenides on foils, followed by chemical etching in acids to make them nanoporous. Besides water purification, this work is anticipated to impact other applications where membranes are used such as gas and biomolecule filtration. This project leverages research outcomes for education and outreach. Outreach to the broad nanomaterials community and to membrane industry involves sharing of manufacturing processing data. The educational component provides innovative multidisciplinary learning opportunities for students at all levels at the crossroads of solid-state physics, materials science and high-resolution microscopy. Student outreach includes presentations to high school students and participation in STEM activities.This grant supports advanced manufacturing of two-dimensional (2D) nanomaterials towards creating novel cm-scale membranes, in which monolayers are supported by robust few-layer membranes. Two-dimensional nanomaterials, such as, transition metal dichalcogenides, have demonstrated potential for many applications from defect-free materials for electronics to defect-engineered materials for membrane separation technologies like water desalination and gas separation. Current fabrication of 2D nanoporous membranes is often limited in terms of control or rely on the use of ion and electron beam irradiation, which is slow and costly. This work uses simple chemical etching to make holes in membranes using an industrial wet etchant, leading to controllable membrane porosity and economic manufacturing. This research answers key scientific questions about fundamental properties of ion flow as a function of membrane properties, thickness, pore size and density towards efficient water desalination in comparison with state-of-the-art polymer membranes. The research approach encompasses chemical vapor deposition growth of single- and few-atom thick 2D nanomaterials up to 4-inch wafer-scales, the optimization of 2D nanomaterials transfer on to apertures to make 2D nanomaterial membranes, followed by wet etching and transport studies to understand fundamental pore-forming and ion transport mechanisms. The research involves optimizing the manufacture of ultrathin membranes and maximizing water flow while retaining membrane integrity. This work further develops the instrumentation towards scale-up via roll-to-roll nanomanufacturing of the nanoporous 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.

这笔先进制造补助金支持用于高效水净化的新型超薄膜的研究。这项工作的重点是大面积制造超薄过渡金属二硫属化物膜，以提高水过滤和处理的精度。该项目通过了解这些改进的膜中原子尺度的水分子和离子运动机制，创造了新的基础知识。减少膜厚度的一个重要动机是它会导致水通量增加。该膜是通过在箔上化学气相沉积过渡金属二硫属化物制成的，然后在酸中进行化学蚀刻以使它们具有纳米孔。除了水净化之外，这项工作预计还将影响其他使用膜的应用，例如气体和生物分子过滤。该项目利用研究成果进行教育和推广。向广泛的纳米材料界和膜行业的推广涉及制造加工数据的共享。教育部分为处于固态物理、材料科学和高分辨率显微镜十字路口的各级学生提供创新的多学科学习机会。学生外展活动包括向高中生做演讲和参与 STEM 活动。这笔赠款支持二维 (2D) 纳米材料的先进制造，以创建新颖的厘米级膜，其中单层膜由坚固的少层膜支撑。二维纳米材料（例如过渡金属二硫属化物）已显示出许多应用的潜力，从用于电子产品的无缺陷材料到用于膜分离技术（如水淡化和气体分离）的缺陷工程材料。目前二维纳米多孔膜的制造通常在控制方面受到限制，或者依赖于离子和电子束辐照的使用，这是缓慢且昂贵的。这项工作使用简单的化学蚀刻，使用工业湿法蚀刻剂在膜上打孔，从而实现可控的膜孔隙率和经济的制造。这项研究回答了有关离子流基本特性与膜特性、厚度、孔径和密度的函数关系的关键科学问题，以实现与最先进的聚合物膜相比的高效海水淡化。该研究方法包括化学气相沉积生长单原子和少原子厚的2D纳米材料至4英寸晶圆级，优化2D纳米材料转移到孔径上以制造2D纳米材料膜，然后进行湿法蚀刻和传输研究以了解基本的成孔和离子传输机制。该研究涉及优化超薄膜的制造和最大化水流量，同时保持膜的完整性。这项工作通过纳米多孔膜的卷对卷纳米制造进一步开发了仪器，以实现规模化。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

期刊论文数量（4）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Ultrafast Polymer Dynamics through a Nanopore

DOI：
10.1021/acs.nanolett.2c03546
发表时间：
2022-10-31
期刊：
NANO LETTERS
影响因子：
10.8
作者：
Lin, Chih-Yuan;Fotis, Riley;Drndic, Marija
通讯作者：
Drndic, Marija

Gas flow through atomic-scale apertures

DOI：
10.1126/sciadv.abc7927
发表时间：
2020-12-01
期刊：
SCIENCE ADVANCES
影响因子：
13.6
作者：
Thiruraman, Jothi Priyanka;Dar, Sidra Abbas;Radha, Boya
通讯作者：
Radha, Boya

Computer vision AC-STEM automated image analysis for 2D nanopore applications

适用于 2D 纳米孔应用的计算机视觉 AC-STEM 自动图像分析

DOI：
10.1016/j.ultramic.2021.113249
发表时间：
2021
期刊：
Ultramicroscopy
影响因子：
2.2
作者：
Chen, Joshua;Balan, Adrian;Masih Das, Paul;Thiruraman, Jothi Priyanka;Drndić, Marija
通讯作者：
Drndić, Marija