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Advances in Transition Metal Based Oxides, Chalcogenides, and MXenes

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Physics".

Deadline for manuscript submissions: closed (10 February 2024) | Viewed by 831

Special Issue Editor


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Guest Editor
Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan
Interests: transition-metal oxides; metal–insulator transition; charge– orbital ordering; strong correlations; magnetism; multiferroic materials; 2D materials; electron–phonon superconductors; topological insulators/semimetals/superconductors; thermoelectric materials; thin films, nano-structures; surface systems
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Special Issue Information

Dear Colleagues,

Transition-metal elements play important roles in many kinds of three-dimensional and two-dimensional materials such as transition-metal oxides (TMO), transition-metal chalcogenides (TMC), and MXenes (MX). They show diverse characteristics, from Mott-insulators, semiconductors, normal metals, magnetic materials, half-metals, semi-metals, multiferroics, thermoelectrics, topological materials, to superconductors. The underline mechanisms for this wide spectrum include strong correlation, spin–orbit interaction, metal–insulator transitions, charge-orbital ordering, magnetism, and interplays between charge, orbital, spin, and lattice structure degree of freedom. Low-dimensional transition-metal-based materials such as 2D-oxides, TMC, MX, thin films, heterostructures, and surface systems show even wider novel behaviors with high potential applications in future industry. This Special Issue is dedicated to achieve a better understanding regarding the novel properties of these transition-metal-based materials in all dimensions.

Prof. Dr. Horng-Tay Jeng
Guest Editor

Manuscript Submission Information

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Keywords

  • transition-metal oxide
  • transition-metal chalcogenides
  • MXenes
  • two-dimensional materials
  • three-dimensional materials
  • heterostructures

Published Papers (1 paper)

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Research

15 pages, 8934 KiB  
Article
SERS Performance of Ti3C2Tx MXene-Based Substrates Correlates with Surface Morphology
by Farnoush Salehtash, Adriana Annušová, Anastasiia Stepura, Yaryna Soyka, Yuriy Halahovets, Monika Hofbauerová, Matej Mičušík, Mário Kotlár, Peter Nádaždy, Paweł Albrycht, Peter Šiffalovič, Matej Jergel, Mária Omastová and Eva Majková
Materials 2024, 17(6), 1385; https://doi.org/10.3390/ma17061385 - 18 Mar 2024
Viewed by 548
Abstract
The surface-enhanced Raman scattering (SERS) properties of low-dimensional semiconducting MXene nanoflakes have been investigated over the last decade. Despite this fact, the relationship between the surface characteristics and SERSing performance of a MXene layer has yet to be comprehensively investigated and elucidated. This [...] Read more.
The surface-enhanced Raman scattering (SERS) properties of low-dimensional semiconducting MXene nanoflakes have been investigated over the last decade. Despite this fact, the relationship between the surface characteristics and SERSing performance of a MXene layer has yet to be comprehensively investigated and elucidated. This work shows the importance of surface morphology on the overall SERS effect by studying few-layer Ti3C2Tx MXene-based SERS substrates fabricated by vacuum-assisted filtration (VAF) and spray coating on filter paper. The VAF deposition results in a dense MXene layer suitable for SERS with high spot-to-spot and substrate-to-substrate reproducibility, with a significant limit of detection (LoD) of 20 nM for Rhodamine B analyte. The spray-coated MXenes film revealed lower uniformity, with a LoD of 50 nM for drop-casted analytes. Moreover, we concluded that the distribution of the analyte deposited onto the MXene layer is affected by the presence of MXene aggregates created during the deposition of the MXene layer. Accumulation of the analyte molecules in the vicinity of MXene aggregates was observed for drop-casted deposition of the analyte, which affects the resulting SERS enhancement. Ti3C2Tx MXene layers deposited on filter paper by VAF offer great potential as a cost-effective, easy-to-manufacture, yet robust, platform for sensing applications. Full article
(This article belongs to the Special Issue Advances in Transition Metal Based Oxides, Chalcogenides, and MXenes)
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