Silicon carbide (SiC) is a very promising platform for quantum information processing, as it can host room temperature solid state defect quantum bits. These room temperature quantum bits are realized by paramagnetic silicon vacancy and divacancy defects in SiC that are typically introduced by irradiation techniques. However, irradiation techniques often introduce unwanted defects near the target quantum bit defects that can be detrimental for the operation of quantum bits. Here, we demonstrate that by adding aluminum precursor to the silicon and carbon sources, quantum bit defects are created in the synthesis of SiC without any post treatments. We optimized the synthesis parameters to maximize the paramagnetic defect concentrations—including already established defect quantum bits—monitored by electron spin resonance spectroscopy.
The growing interest of researchers in the development of nanomaterials can be measured by the large number of articles and patents that have been published in recent years. In particular, inorganic, organic or even hybrid nanoparticles of different sizes and shapes are already synthesized in a very controlled manner and without very elaborated experimental conditions. However, despite the advances, much work remains to be done on the use of nanoparticles as building blocks for the generation of new nanostructured materials and devices. Actual manipulation of nanoparticles for the construction of a particular device has many limits and usually requires high cost and high technology equipment. However, a promising strategy that can lead to the formation of nanostructured arrangements in a very controlled manner is based on nanoparticle self-assembly processes. Directed particle self-assembly can be described as a planned, controlled and organized aggregation of the particles to obtain a specific particles arrangement or device. Self-assembling material not only serves to generate a structure itself, but also to achieve unique chemical and physical properties in the material that arise only due to the arrangement and interactions between the nanoparticulates. Due to the importance of this subject for the development of nanotechnology products, this article shows, through a broad and generalized approach, some of the most common methods found in the specialized literature about self-assembling of metallic nanoparticles. O crescente interesse de pesquisadores no desenvolvimento de nanomateriais pode ser medido pelo grande número de artigos e patentes que vêm sendo publicados nos últimos anos. Particularmente, nanopartículas inorgânicas, orgânicas ou mesmo híbridas, das mais variadas formas e tamanhos, já são sintetizadas de maneira bastante controlada e sem condições experimentais muito elaboradas. Entretanto, apesar dos avanços, ainda há muito trabalho por ser realizado quanto ao emprego de nanopartículas como blocos de construção para a geração de novos materiais e dispositivos nanoestruturados. A real manipulação de nanopartículas para a construção de um determinado dispositivo apresenta muitos limites e geralmente requer equipamentos de elevado custo e alta tecnologia. Contudo, uma estratégia promissora que pode levar à formação de arranjos nanoestruturados de maneira bastante controlada baseia-se em processos de automontagem de nanopartículas. A automontagem planejada de partículas pode ser descrita com uma agregação planificada, controlada e organizada das mesmas para a obtenção de um arranjo ou dispositivo. O material obtido por automontagem não serve apenas para a geração de uma estrutura em si, mas também para alcançar propriedades químicas e físicas singulares no material que se manifestam apenas devido ao arranjo e a interação entre seus componentes nanoparticulados. Devido à importância desse tema para o desenvolvimento de produtos nanotecnológicos, este artigo de revisão mostra, através de uma abordagem ...
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