Modulating the Adhesion, Friction and Lubrication Characteristics of Few-Atom Thick Materials in Aqueous Environment over Several Length Scales

在多个长度尺度上调节水环境中少原子厚材料的粘附、摩擦和润滑特性

基本信息

批准号：
1904216
负责人：
Rosa Espinosa-Marzal
金额：
$ 45万
依托单位：
University of Illinois at Urbana-Champaign
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-08-15 至 2024-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1904216&HistoricalAwards=false
关键词：
Modulating Adhesion Friction Lubrication Characteristics

项目摘要

Two-dimensional (2D) materials are drawing significant attention because their atomic size results in unique material properties. Although water is often present in these systems and it significantly affects the microelectromechanical system or device performance, very little is known about the interfacial properties of 2D materials in the presence of water. This is partially due to the challenges involved in contamination-free, controlled processing of high quality 2D materials, which limits fundamental studies and applications. This project will study the science associated with the interfacial properties of 2D materials. Since the technology has direct applicability to micro and nano-scale devices, the research has the potential to impact the automotive, consumer electronic, aerospace and defense sectors, and therefore directly impacts economic welfare and national security. The research will contribute to the development of work force in the U.S. by training two graduate students research assistants. Further, the PIs? integrated education plan is designed to spark the early interest of K-12 students in STEM and inspire undergraduate and graduate students to further advance their interests in the intersection of 2D materials and surface science and engineering. In addition, the PIs will focus on broadening nano-engineering education by engaging student veterans and high school and minority students via summer research opportunities and field trips. The PIs will also actively pursue outreach activities, including interactive lectures and hands-on activities.In order to fill the knowledge gap of interfacial properties of 2D materials in aqueous environment, two major lines of research will be followed: (1) establish manufacturing methods for single- and few-layer graphene and molybdenum disulfide (MoS2) that afford control of their quality, the number of layers and substrate-induced doping characteristics over several length scales and (2) fundamentally comprehend, measure and model friction, adhesion, and lubrication by few-atomic thick materials in aqueous environment. The research hypothesis is that substrate-induced doping can be a means to modulate the interactions of few-atomic thick materials with water and ions, as well as their interfacial mobility, and therefore, it can be used to control electrical double layer, friction, adhesion and lubrication mechanisms. Preparation of contamination-free, single-crystalline graphene and MoS2 layers with controlled substrate-induced doping will enable careful study of interfacial properties of 2D materials in aqueous environment. Measurements with a surface forces apparatus (SFA) will provide thorough data of interfacial forces, which will be precisely modeled to quantify the effects of the substrate-induced doping. The ease of preparing samples for atomic force microscopy (AFM) will enable to also investigate substrate-induced doping via metal thin films, a higher number of ionic compositions and also to qualitatively compare the interfacial behavior of MoS2 and graphene with several other (exfoliated) 2D materials and with the bulk crystals. Ultimately, a theory for the relation between substrate-induced doping of 2D materials and their adhesive and frictional characteristics in the presence of water will be established.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.

二维 (2D) 材料引起了广泛关注，因为它们的原子尺寸导致了独特的材料特性。尽管这些系统中经常存在水，并且它会显着影响微机电系统或器件的性能，但人们对水存在下二维材料的界面特性知之甚少。部分原因是高质量二维材料的无污染、受控加工面临挑战，这限制了基础研究和应用。该项目将研究与二维材料界面特性相关的科学。由于该技术可直接适用于微米和纳米级设备，因此该研究有可能影响汽车、消费电子、航空航天和国防领域，从而直接影响经济福利和国家安全。该研究将通过培训两名研究生研究助理来促进美国劳动力的发展。此外，PI？综合教育计划旨在激发 K-12 学生对 STEM 的早期兴趣，并激励本科生和研究生进一步提高他们对 2D 材料和表面科学与工程交叉领域的兴趣。此外，PI 将通过暑期研究机会和实地考察吸引退伍军人、高中生和少数族裔学生参与，重点扩大纳米工程教育。 PI还将积极开展外展活动，包括互动讲座和实践活动。为了填补水环境中二维材料界面性质的知识空白，将遵循两大研究方向：（1）建立制造方法对于单层和多层石墨烯和二硫化钼 (MoS2)，可以在多个长度尺度上控制其质量、层数和基材诱导的掺杂特性，以及 (2) 从根本上理解、测量和模拟水环境中少原子厚材料的摩擦、粘附和润滑。研究假设是，基底诱导掺杂可以成为调节少原子厚材料与水和离子的相互作用以及它们的界面迁移率的一种手段，因此，它可以用于控制双电层、摩擦、粘附和润滑机制。通过受控基底诱导掺杂制备无污染的单晶石墨烯和 MoS2 层，将使人们能够仔细研究水环境中二维材料的界面特性。使用表面力装置（SFA）进行的测量将提供全面的界面力数据，这些数据将被精确建模以量化衬底引起的掺杂的影响。原子力显微镜 (AFM) 样品的制备简便，还可以研究通过金属薄膜、更多数量的离子成分诱导的基底掺杂，并定性比较 MoS2 和石墨烯与其他几种（剥离）的界面行为二维材料和块状晶体。最终，将建立二维材料的基材诱导掺杂与其在水存在下的粘合和摩擦特性之间关系的理论。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进行评估，被认为值得支持以及更广泛的影响审查标准。

项目成果

期刊论文数量（5）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Strongly enhanced electromechanical coupling in atomically thin transition metal dichalcogenides

原子薄过渡金属二硫属化物中机电耦合的强烈增强

DOI：
10.1016/j.mattod.2020.12.021
发表时间：
2021-02
期刊：
Materials Today
影响因子：
24.2
作者：
Haque, Md Farhadul;Snapp, Peter;Kim, Jin Myung;Wang, Michael Cai;Bae, Hyung Jong;Cho, Chullhee;Nam, SungWoo
通讯作者：
Nam, SungWoo

Curved neuromorphic image sensor array using a MoS2-organic heterostructure inspired by the human visual recognition system

受人类视觉识别系统启发，采用 MoS2 有机异质结构的弯曲神经形态图像传感器阵列

DOI：
10.1038/s41467-020-19806-6
发表时间：
2020-11
期刊：
Nature Communications
影响因子：
16.6
作者：
Choi, Changsoon;Leem, Juyoung;Kim, Minsung;Taqieddin, Amir;Cho, Chullhee;Cho, Kyoung Won;Lee, Gil Ju;Seung, Hyojin;Bae, Hyung Jong;Song, Young Min;et al
通讯作者：
et al

Plasmonic sensors based on graphene and graphene hybrid materials

基于石墨烯和石墨烯混合材料的等离激元传感器

DOI：
10.1186/s40580-022-00319-5
发表时间：
2022-06
期刊：
Nano Convergence
影响因子：
11.7
作者：
Zhang, Zhichao;Lee, Yeageun;Haque, Md Farhadul;Leem, Juyoung;Hsieh, Ezekiel Y.;Nam, SungWoo
通讯作者：
Nam, SungWoo

Effects of Layering and Supporting Substrate on Liquid Slip at the Single-Layer Graphene Interface

分层和支撑基底对单层石墨烯界面液体滑移的影响

DOI：
10.1021/acsnano.1c01884
发表时间：
2021-06
期刊：
ACS Nano
影响因子：
17.1
作者：
Greenwood, Gus;Kim, Jin Myung;Zheng, Qianlu;Nahid, Shahriar Muhammad;Nam, SungWoo;Espinosa
通讯作者：
Espinosa

Heterogeneous deformation of two-dimensional materials for emerging functionalities

二维材料的异质变形以实现新兴功能