Synthesis of silver-palladium Janus nanoparticles using co-sputtering of independent sources: experimental and theorical study.

IF 2.6 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Beilstein Journal of Nanotechnology Pub Date : 2024-07-04 eCollection Date: 2024-01-01 DOI:10.3762/bjnano.15.67
Maria J Martínez-Carreón, Francisco Solís-Pomar, Abel Fundora, Claudio D Gutiérrez-Lazos, Sergio Mejía-Rosales, Hector N Fernández-Escamilla, Jonathan Guerrero-Sánchez, Manuel F Meléndrez, Eduardo Pérez-Tijerina
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引用次数: 0

Abstract

Janus-type nanoparticles are important because of their ability to combine distinct properties and functionalities in a single particle, making them extremely versatile and valuable in various scientific, technological, and industrial applications. In this work, bimetallic silver-palladium Janus nanoparticles were obtained for the first time using the inert gas condensation technique. In order to achieve this, an original synthesis equipment built by Mantis Ltd. was modified by the inclusion of an additional magnetron in a second chamber, which allowed us to use two monometallic targets to sputter the two metals independently. With this arrangement, we could find appropriate settings at room temperature to promote the synthesis of bimetallic Janus nanoparticles. The structural properties of the resulting nanoparticles were investigated by transmission electron microscopy (TEM), and the chemical composition was analyzed by TEM energy dispersive spectroscopy (TEM-EDS), which, together with structural analysis, confirmed the presence of Janus-type nanostructures. Results of molecular dynamics and TEM simulations show that the differences between the crystalline structures of the Pd and Ag regions observed in the TEM micrographs can be explained by small mismatches in the orientations of the two regions of the particle. A density functional theory structural aims to understand the atomic arrangement at the interface of the Janus particle.

利用独立来源的共溅射合成银钯 Janus 纳米粒子:实验和理论研究。
Janus 型纳米粒子之所以重要,是因为它们能够在单个粒子中结合不同的特性和功能,使其在各种科学、技术和工业应用中具有极高的通用性和价值。本研究首次利用惰性气体冷凝技术获得了银钯双金属 Janus 纳米粒子。为了实现这一目标,我们对 Mantis 有限公司制造的原合成设备进行了改装,在第二个腔室中增加了一个磁控管,这样我们就可以使用两个单金属靶来独立溅射两种金属。通过这种安排,我们可以在室温下找到合适的设置,以促进双金属 Janus 纳米粒子的合成。我们用透射电子显微镜(TEM)研究了所得纳米粒子的结构特性,并用 TEM 能量色散光谱(TEM-EDS)分析了其化学成分。分子动力学和 TEM 模拟的结果表明,TEM 显微照片中观察到的钯区和银区结晶结构之间的差异可以用颗粒两个区域取向的微小错配来解释。密度泛函理论结构旨在了解 Janus 粒子界面上的原子排列。
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来源期刊
Beilstein Journal of Nanotechnology
Beilstein Journal of Nanotechnology NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
5.70
自引率
3.20%
发文量
109
审稿时长
2 months
期刊介绍: The Beilstein Journal of Nanotechnology is an international, peer-reviewed, Open Access journal. It provides a unique platform for rapid publication without any charges (free for author and reader) – Platinum Open Access. The content is freely accessible 365 days a year to any user worldwide. Articles are available online immediately upon publication and are publicly archived in all major repositories. In addition, it provides a platform for publishing thematic issues (theme-based collections of articles) on topical issues in nanoscience and nanotechnology. The journal is published and completely funded by the Beilstein-Institut, a non-profit foundation located in Frankfurt am Main, Germany. The editor-in-chief is Professor Thomas Schimmel – Karlsruhe Institute of Technology. He is supported by more than 20 associate editors who are responsible for a particular subject area within the scope of the journal.
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