Microstructure evolution of Ti3C2 / TiO2 quasi-dynamic heterostructures with high SERS sensitivity

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-03-01 DOI:10.1016/j.ceramint.2024.12.419

Renjie Li , Qiqi Chen , Wenyan Shi , Rui Da , Jiajing Lin , Zheng Li , Zhuohong Feng , Lin Lin , Yang Ren , Guilin Chen , Zhezhe Wang

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Abstract

A typical 2D MXenes of Ti₃C₂ were deposited on TiO₂ by thermal spraying. The formed heterostructures show excellent SERS sensitivity and reproductivity comparable to noble metals. The EF is estimated to be 5.09 ∗ 10⁹, and the LOD is calculated to be about 1.09∗10⁻¹³ M. The RSD of Rhodamine 6G (R6G) detected is about 3.13 %. The UV–vis spectra and PLE spectra demonstrates the local interface charge transfer (CT) in the Ti₃C₂/TiO₂ heterostructures. Furthermore, the 3D FDTD simulation was employed to simulate the spatial distribution of the electric field, which reveal that the charge transfer caused by the interface effects in 2D Ti₃C₂/TiO₂ structures play predominant role for improving the SERS performance via enhancing the electromagnetic field intensity. While, when the thickness of multi-layer Ti₃C₂ increases, local interface effect disappears, and the Raman enhancement mainly depend on the excellent metal conductivity of Ti₃C₂. The dynamic microstructure evolution of Ti₃C₂ into TiO₂ was surveyed by the SERS spectra and the results indicates that the decomposition of Ti₃C₂ is a first-order chemical reaction.

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.