CAREER: Exploring Fast Mass Transport in Carbon Nanofluidics

职业：探索碳纳米流体中的快速传质

• 批准号: 1653767
• 负责人: Chuanhua Duan
• 金额: $ 50.68万
• 依托单位: Trustees of Boston University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-02-15 至 2023-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1653767&HistoricalAwards=false
• 关键词: CAREER; Exploring; Fast; Mass; Transport

CBET - 1653767PI: Duan, ChuanhuaRecent experiments indicate that flow through channels that have nanometer dimensions and smooth carbon surfaces is significantly enhanced compared with flow through channels that have similar or larger dimensions but other types of surfaces. However, the mechanism of flow enhancement in these nanochannels is not fully understood, in part because prior experiments produced highly variable results. This award will support a series of experiments to help reconcile ambiguities in prior experiments and, more importantly, to help uncover the underlying mechanisms of flow enhancement at nanoscale dimensions. Unlike most prior experiments that used flow through arrays of nanochannels in a thin membrane, this project will measure flow of water and ions through individual nanofluidic conduits. A new method of nanochannel design and fabrication, coupled with capillary flow, will be used to directly measure the hydraulic resistance, ionic conductance and mobility, as well as water and ion flow enhancement in single, well-defined carbon nanotubes and graphene nanochannels. Correlations between flow enhancement and material properties, supported by computational modeling, will elucidate key factors that make flow through carbon nanofluidic conduits unique. The results will be useful in designing and fabricating carbon nanofluidic devices and structures for a variety of applications, including water desalination, batteries and fuel cells, lab-on-a-chip, as well as in interpreting certain flows in geology, biology and physiology. The award includes support for educational activities for students at all academic levels. Cartoon animations and hands-on lab kits that illustrate the unique physics of flow at the nanoscale will be developed for use by K-12 students. The project will provide opportunities for undergraduates, especially those from underrepresented groups, to participate in the research. Since research using membranes consisting of multi-conduit carbon nanotubes or graphene nanochannels introduces ambiguities due to conduit-size polydispersity, this award will study water and ion transport in single carbon nanotubes and graphene nanochannels with well-defined sizes, surface properties and barrier materials. The experiments will test the hypothesis that fast mass transport of water and ions in these channels results from unique surface-water and surface-ion interactions, which strongly depend on the substrate or barrier material as well as on the confinement and surface properties of these carbon nanofluidic conduits. Experimental measurements will be compared with molecular dynamics simulations that consider explicitly effects of substrate/barrier material, surface charge, and ion-water interactions. The carbon nanofluidic devices fabricated in this project will also provide investigators a platform to study selective ion and gas transport, which could not only improve understanding of carbon nanofluidics, but also expand its practical applications to chemical and biological separations processes.

最近的实验表明，与具有相似或更大尺寸但具有其他类型表面的通道相比，具有纳米尺寸和光滑碳表面的通道的流动明显增强。然而，这些纳米通道中增强流动的机制尚不完全清楚，部分原因是先前的实验产生了高度可变的结果。该奖项将支持一系列实验，以帮助解决先前实验中的模糊性，更重要的是，帮助揭示纳米尺度上流动增强的潜在机制。与之前大多数使用薄膜中纳米通道阵列流动的实验不同，该项目将测量通过单个纳米流体管道的水和离子的流动。一种新的纳米通道设计和制造方法，结合毛细管流动，将被用于直接测量单个、定义明确的碳纳米管和石墨烯纳米通道的水力阻力、离子电导和迁移率，以及水和离子流动的增强。在计算模型的支持下，流动增强与材料特性之间的相关性将阐明使碳纳米流体管道流动独特的关键因素。研究结果将有助于设计和制造碳纳米流体装置和结构，用于各种应用，包括海水淡化、电池和燃料电池、芯片实验室，以及解释地质学、生物学和生理学中的某些流动。该奖项包括对所有学术水平学生的教育活动的支持。卡通动画和动手实验套件，说明独特的物理流动在纳米尺度将开发供K-12学生使用。该项目将为本科生，特别是那些来自代表性不足群体的本科生提供参与研究的机会。由于使用由多管道碳纳米管或石墨烯纳米通道组成的膜的研究由于管道尺寸的多分散性而引入了模糊性，因此该奖项将研究具有明确尺寸、表面特性和屏障材料的单碳纳米管和石墨烯纳米通道中的水和离子传输。这些实验将验证这样一个假设，即这些通道中水和离子的快速质量传递是由独特的地表水和表面离子相互作用产生的，这种相互作用强烈地依赖于衬底或屏障材料，以及这些碳纳米流体管道的约束和表面特性。实验测量将与分子动力学模拟进行比较，后者明确考虑了衬底/势垒材料、表面电荷和离子-水相互作用的影响。本项目制备的碳纳米流体器件也将为研究者提供一个研究选择性离子和气体输运的平台，这不仅可以提高对碳纳米流体的认识，而且可以扩大其在化学和生物分离过程中的实际应用。

项目成果

Surface charge enhanced kinetically-limited evaporation in nanopores

• DOI: 10.1016/j.ijheatmasstransfer.2023.123865
• 发表时间: 2023
• 期刊: International Journal of Heat and Mass Transfer
• 影响因子: 5.2
• 作者: Chu-Yao Chou;Chuanhua Duan

Fast water transport in graphene nanofluidic channels

• DOI: 10.1038/s41565-017-0031-9
• 发表时间: 2018
• 期刊: Nature Nanotechnology
• 影响因子: 38.3
• 作者: Q. Xie;M. Alibakhshi;Shuping Jiao;Zhiping Xu;M. Hempel;J. Kong;H. Park;Chuanhua Duan

Exploring Anomalous Fluid Behavior at the Nanoscale: Direct Visualization and Quantification via Nanofluidic Devices

探索纳米尺度的异常流体行为：通过纳米流体设备直接可视化和量化

• DOI: 10.1021/acs.accounts.9b00411
• 发表时间: 2020
• 期刊: Accounts of Chemical Research
• 影响因子: 18.3
• 作者: Zhong, Junjie;Alibakhshi, Mohammad Amin;Xie, Quan;Riordon, Jason;Xu, Yi;Duan, Chuanhua;Sinton, David
• 通讯作者: Sinton, David

Edge-enhanced ultrafast water evaporation from graphene nanopores

• DOI: 10.1016/j.xcrp.2022.100900
• 发表时间: 2022-05
• 期刊: Cell Reports Physical Science
• 影响因子: 8.9
• 作者: Siyang Xiao;Kaixin Meng;Q. Xie;Linxin Zhai;Zhiping Xu;Hao Wang;Chuanhua Duan

Current monitoring in nanochannels

• DOI: 10.1007/s10404-022-02589-1
• 发表时间: 2022-10
• 期刊: Microfluidics and Nanofluidics
• 影响因子: 2.8
• 作者: Siyang Xiao;Zachary Wollman;Q. Xie;Chuanhua Duan