纳米通道中流体扩散动力学的微拉曼光谱研究

IF 5.4 2区 工程技术 Q1 BIOCHEMICAL RESEARCH METHODS
Lab on a Chip Pub Date : 2025-08-13 DOI:10.1039/D5LC00549C
Jingyu Chen, Haowei Lu, Kecheng Zeng, Haidong Ji, Peixue Jiang and Ruina Xu
{"title":"纳米通道中流体扩散动力学的微拉曼光谱研究","authors":"Jingyu Chen, Haowei Lu, Kecheng Zeng, Haidong Ji, Peixue Jiang and Ruina Xu","doi":"10.1039/D5LC00549C","DOIUrl":null,"url":null,"abstract":"<p >Fluid diffusion kinetics in nanopores is crucial for energy conversion and utilization but influenced by complex pore structure and fluid–wall interactions. Traditional experiments are difficult to decouple diffusion in nanopores and micron-pores, molecular simulations are time-consuming when handling pores with diameters larger than 10 nm, and nanofluidic experiments <em>via</em> conventional optical methods face challenges in measuring fluid concentrations. Here, we report a novel Concentration Decay Method combining nanofluidics and microscopic Raman spectroscopy to investigate diffusion in nanochannels. A “channel-channel-cell” chip design enables real-time detection of fluid concentrations in microcells and measurement of diffusion coefficients in nanochannels, and a self-made temperature control module enables precise adjustment of fluid temperature. By this method, interdiffusion experiments of an <em>n</em>-octane–1-octene mixture and <em>n</em>-octane–cyclooctane mixture in nanochannels (depths = 21–173 nm) are conducted to explore oil diffusion in shale. We report that the oil diffusion in nanochannels still conforms to Fick's diffusion law, and the diffusion coefficients in channels with a minimum depth of 21 nm and at different temperatures (295–383 K) exhibit no obvious deviation from the bulk phase, suggesting that fluid–wall interactions have no significant effect on diffusion kinetics in our experiments. The consistency of the experimental results and classical predictions also validates the reliability of our Concentration Decay Method, which fills the gap in research on fluid diffusion in nanopores and has promising application prospects. Diffusion in nanochannels with more types of fluids, more complex channel structures and smaller depth of the channel can be furthered investigated by this method.</p>","PeriodicalId":85,"journal":{"name":"Lab on a Chip","volume":" 19","pages":" 5065-5078"},"PeriodicalIF":5.4000,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Investigation of fluid diffusion kinetics in nanochannels using micro-Raman spectrometry\",\"authors\":\"Jingyu Chen, Haowei Lu, Kecheng Zeng, Haidong Ji, Peixue Jiang and Ruina Xu\",\"doi\":\"10.1039/D5LC00549C\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Fluid diffusion kinetics in nanopores is crucial for energy conversion and utilization but influenced by complex pore structure and fluid–wall interactions. Traditional experiments are difficult to decouple diffusion in nanopores and micron-pores, molecular simulations are time-consuming when handling pores with diameters larger than 10 nm, and nanofluidic experiments <em>via</em> conventional optical methods face challenges in measuring fluid concentrations. Here, we report a novel Concentration Decay Method combining nanofluidics and microscopic Raman spectroscopy to investigate diffusion in nanochannels. A “channel-channel-cell” chip design enables real-time detection of fluid concentrations in microcells and measurement of diffusion coefficients in nanochannels, and a self-made temperature control module enables precise adjustment of fluid temperature. By this method, interdiffusion experiments of an <em>n</em>-octane–1-octene mixture and <em>n</em>-octane–cyclooctane mixture in nanochannels (depths = 21–173 nm) are conducted to explore oil diffusion in shale. We report that the oil diffusion in nanochannels still conforms to Fick's diffusion law, and the diffusion coefficients in channels with a minimum depth of 21 nm and at different temperatures (295–383 K) exhibit no obvious deviation from the bulk phase, suggesting that fluid–wall interactions have no significant effect on diffusion kinetics in our experiments. The consistency of the experimental results and classical predictions also validates the reliability of our Concentration Decay Method, which fills the gap in research on fluid diffusion in nanopores and has promising application prospects. Diffusion in nanochannels with more types of fluids, more complex channel structures and smaller depth of the channel can be furthered investigated by this method.</p>\",\"PeriodicalId\":85,\"journal\":{\"name\":\"Lab on a Chip\",\"volume\":\" 19\",\"pages\":\" 5065-5078\"},\"PeriodicalIF\":5.4000,\"publicationDate\":\"2025-08-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Lab on a Chip\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://pubs.rsc.org/en/content/articlelanding/2025/lc/d5lc00549c\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"BIOCHEMICAL RESEARCH METHODS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Lab on a Chip","FirstCategoryId":"5","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2025/lc/d5lc00549c","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"BIOCHEMICAL RESEARCH METHODS","Score":null,"Total":0}
引用次数: 0

摘要

纳米孔隙中的流体扩散动力学对页岩油的开发至关重要,但受复杂孔隙结构和流体-壁相互作用的影响。核心尺度的实验难以解耦纳米孔和微米孔中的扩散,处理直径大于10 nm的孔时进行分子模拟非常耗时,并且通过传统光学方法进行纳米流体实验对测量流体浓度具有挑战性。目前,还没有可靠的方法来研究典型页岩纳米孔(直径= 10~100 nm)中的流体扩散。在这里,我们报告了一种结合微观拉曼光谱的纳米流体方法来研究模拟页岩纳米孔的纳米通道中的扩散。“通道-通道-细胞”芯片设计可实时检测微细胞中的流体浓度,测量纳米通道中的扩散系数,自制温控模块可精确调节流体温度。利用该方法,进行了正辛烷-1-辛烷混合物和正辛烷-环辛烷混合物在纳米通道(深度为21~173 nm)内的相互扩散实验。结果表明,纳米通道内的扩散仍然符合菲克扩散定律,在最小深度为21 nm的通道内,不同温度下(22~110℃)的扩散系数与体相没有明显偏差,表明在我们的实验中,流体-壁相互作用对扩散动力学没有显著影响。实验结果与经典预测的一致性也验证了该方法的可靠性,填补了纳米孔中流体扩散研究的空白,具有广阔的应用前景。该方法可以进一步研究流体种类多、通道结构复杂、通道深度小的纳米通道中的扩散问题。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Investigation of fluid diffusion kinetics in nanochannels using micro-Raman spectrometry

Investigation of fluid diffusion kinetics in nanochannels using micro-Raman spectrometry

Fluid diffusion kinetics in nanopores is crucial for energy conversion and utilization but influenced by complex pore structure and fluid–wall interactions. Traditional experiments are difficult to decouple diffusion in nanopores and micron-pores, molecular simulations are time-consuming when handling pores with diameters larger than 10 nm, and nanofluidic experiments via conventional optical methods face challenges in measuring fluid concentrations. Here, we report a novel Concentration Decay Method combining nanofluidics and microscopic Raman spectroscopy to investigate diffusion in nanochannels. A “channel-channel-cell” chip design enables real-time detection of fluid concentrations in microcells and measurement of diffusion coefficients in nanochannels, and a self-made temperature control module enables precise adjustment of fluid temperature. By this method, interdiffusion experiments of an n-octane–1-octene mixture and n-octane–cyclooctane mixture in nanochannels (depths = 21–173 nm) are conducted to explore oil diffusion in shale. We report that the oil diffusion in nanochannels still conforms to Fick's diffusion law, and the diffusion coefficients in channels with a minimum depth of 21 nm and at different temperatures (295–383 K) exhibit no obvious deviation from the bulk phase, suggesting that fluid–wall interactions have no significant effect on diffusion kinetics in our experiments. The consistency of the experimental results and classical predictions also validates the reliability of our Concentration Decay Method, which fills the gap in research on fluid diffusion in nanopores and has promising application prospects. Diffusion in nanochannels with more types of fluids, more complex channel structures and smaller depth of the channel can be furthered investigated by this method.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Lab on a Chip
Lab on a Chip 工程技术-化学综合
CiteScore
11.10
自引率
8.20%
发文量
434
审稿时长
2.6 months
期刊介绍: Lab on a Chip is the premiere journal that publishes cutting-edge research in the field of miniaturization. By their very nature, microfluidic/nanofluidic/miniaturized systems are at the intersection of disciplines, spanning fundamental research to high-end application, which is reflected by the broad readership of the journal. Lab on a Chip publishes two types of papers on original research: full-length research papers and communications. Papers should demonstrate innovations, which can come from technical advancements or applications addressing pressing needs in globally important areas. The journal also publishes Comments, Reviews, and Perspectives.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信