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Mechanically Activated Solvent-Free Assembly of Ultrasmall Bi2S3 Nanoparticles: A Novel, Simple, and Sustainable Means To Access Chalcogenide Nanoparticles
Chemistry of Materials ( IF 7.2 ) Pub Date : 2017-09-14 00:00:00 , DOI: 10.1021/acs.chemmater.7b02134
Michael Y. Malca 1 , Huizhi Bao 1 , Thomas Bastaille 1, 2 , Nadim K. Saadé 1 , Joseph M. Kinsella 3, 4 , Tomislav Friščić 1 , Audrey Moores 1
Affiliation  

Nanosized Bi2S3 particles are one of the most promising nanomaterials for biomedical imaging, due to a unique combination of low toxicity and the high electron count of bismuth. However, the study and use of nano-sized Bi2S3 have been prevented by major synthetic challenges, including sensitivity to air and harsh solvothermal conditions. Herein, we describe a novel and surprisingly simple pathway, based on solid-state bottom-up self-assembly, to access the elusive Bi2S3 nanoparticles functionalized with surface ligands that allow dispersion in either organic or aqueous media. This one-pot, room-temperature synthesis utilizes mechanical activation in the solid state, either by milling or even manual grinding, to induce the spontaneous assembly of monodisperse 2 nm diameter nanoparticles applicable for CT imaging in physiological media. This solvent-free methodology utilizes readily available precursors to provide unprecedented one-step access to monodisperse nano-Bi2S3 in multigram amounts, including polyethylene glycol (PEG)-coated nanoparticles, without the need for controlled atmospheres or solvothermal treatment.

中文翻译:

机械激活的无溶剂的超小Bi 2 S 3纳米粒子组装:一种新颖,简单,可持续的方式访问硫族化物纳米粒子。

纳米Bi 2 S 3颗粒是低毒和高铋电子的独特结合,是生物医学成像中最有前途的纳米材料之一。然而,由于主要的合成挑战,包括对空气的敏感性和苛刻的溶剂热条件,已经阻止了对纳米级Bi 2 S 3的研究和使用。本文中,我们描述了一种基于固态自底向上自组装的新颖且出乎意料的简单途径,以访问难以捉摸的Bi 2 S 3用表面配体功能化的纳米颗粒,它们可以分散在有机或水性介质中。这种一锅式室温合成利用固态的机械活化(通过研磨或什至手动研磨)来诱导适用于生理介质CT成像的直径为2 nm的单分散纳米颗粒的自发组装。这种无溶剂的方法利用容易获得的前体,以前所未有的一步方式提供了多克数量的单分散纳米Bi 2 S 3,包括涂有聚乙二醇(PEG)的纳米颗粒,而无需进行受控气氛或溶剂热处理。
更新日期:2017-09-15
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