Ana Carolina Ferreira de Brito, Alysson Alves Pinto, Jan Plutnar, Zdenek Sofer, Gabriel Ravanhani Schleder, Rodrigo B Capaz, Ingrid David Barcelos, Bernardo Ruegger Almeida Neves
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Unveiling composition-properties relationships inMo1-xWxSe2alloys: a theoretical and experimental study.
Two-dimensional transition metal dichalcogenide alloys have emerged as a versatile platform for electronic, optoelectronic, and quantum applications due to their tunable crystal structure and unique electronic properties. In this study, we investigate the influence of atomic composition on the structural, electronic, and optical properties of theMo1-xWxSe2alloy, combining experimental and theoretical approaches. Samples with different Mo and W ratios were synthesized and characterized using Raman and photoluminescence spectroscopies, and atomic force microscopy. Local anodic oxidation was employed to manipulate monolayers within the alloy flakes, revealing significant luminescence enhancement in the engineered islands, suggesting structural and electronic modifications. Additionally, density functional theory calculations indicated that oxidation stability strongly depends on atomic composition, with theMo0.5W0.5Se2andMo0.75W0.25Se2alloys exhibiting the highest resistance to vacancy formation. These findings highlight the potential for structural and electronic engineering ofMo1-xWxSe2alloys, paving the way for advanced applications in nanotechnology and quantum computing.
期刊介绍:
The journal aims to publish papers at the forefront of nanoscale science and technology and especially those of an interdisciplinary nature. Here, nanotechnology is taken to include the ability to individually address, control, and modify structures, materials and devices with nanometre precision, and the synthesis of such structures into systems of micro- and macroscopic dimensions such as MEMS based devices. It encompasses the understanding of the fundamental physics, chemistry, biology and technology of nanometre-scale objects and how such objects can be used in the areas of computation, sensors, nanostructured materials and nano-biotechnology.