Deciphering the alignment of vertically aligned multi-walled carbon nanotubes in wet state using surface enhanced Raman spectroscopy

IF 5.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces Pub Date : 2025-03-24 DOI:10.1016/j.surfin.2025.106307

Liwei Ding , Han Lu , Zijie Luo , Guobao He , Mingliang Jin , Xin Wang , Guofu Zhou , Lingling Shui , Eser Metin Akinoglu

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Abstract

Vertically aligned multi-walled carbon nanotubes (VA-MWCNTs) display a structural transformation when transitioning from dry to wet states, often collapsing into angled conical structures. This study probes whether such a transition arises inherently from liquid immersion or because of the drying process. Utilizing Surface Enhanced Raman Spectroscopy (SERS) with gold caps on VA-MWCNTs tips, deposited through a modified Glancing Angle Deposition (GLAD) technique, and Rhodamine 6 G as a molecular probe, we analyze the alignment dynamics of VA-MWCNTs between their wet and dry states. Comparative SERS data from freshly immersed and previously wetted-dried VA-MWCNTs revealed superior Raman enhancement in the angled conical structures. Hence, we conclude that the nanotubes largely retain their vertical stance in liquid environments but undergo an irreversible deformation during the drying process due to (partial) MWCNT severance from the substrate base. This insight is pivotal for applications sensitive to VA-MWCNTs' wet-dry transitions.

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来源期刊

Surfaces and Interfaces Chemistry-General Chemistry

CiteScore

8.50

自引率

6.50%

发文量

753

审稿时长

35 days

期刊介绍： The aim of the journal is to provide a respectful outlet for ''sound science'' papers in all research areas on surfaces and interfaces. We define sound science papers as papers that describe new and well-executed research, but that do not necessarily provide brand new insights or are merely a description of research results. Surfaces and Interfaces publishes research papers in all fields of surface science which may not always find the right home on first submission to our Elsevier sister journals (Applied Surface, Surface and Coatings Technology, Thin Solid Films)