Woznica Hanna, Banski Mateusz, Podhorodecki Artur
Department of Experimental Physics, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland.
Materials (Basel). 2021 Jan 20;14(3):476. doi: 10.3390/ma14030476.
In recent years, numerous protocols for nanoplatelet synthesis have been developed. Here, we present a facile, one-pot method for controlling cadmium sulfide (CdS) nanoparticles' shape that allows for obtaining zero-dimensional, one-dimensional, or two-dimensional structures. The proposed synthesis protocol is a simple heating-up approach and does not involve any inconvenient steps such as injection and/or pouring the precursors at elevated temperatures. Because of this, the synthesis protocol is highly repeatable. A gradual increase in the zinc acetate concentration causes the particles' shape to undergo a transition from isotropic quantum dots through rods to highly anisotropic nanoplatelets. We identified conditions at which synthesized platelets were purely five monolayers thick. All samples acquired during different stages of the reaction were characterized via optical spectroscopy, which allowed for the identification of the presence of high-temperature, magic-size clusters prior to the platelets' formation.
近年来，已经开发出许多用于纳米片晶合成的方案。在此，我们提出一种简便的一锅法来控制硫化镉（CdS）纳米颗粒的形状，该方法能够获得零维、一维或二维结构。所提出的合成方案是一种简单的升温方法，不涉及任何诸如在高温下注射和/或倒入前驱体等不便的步骤。因此，该合成方案具有高度的可重复性。醋酸锌浓度的逐渐增加会使颗粒形状从各向同性的量子点通过棒状转变为高度各向异性的纳米片晶。我们确定了合成的片晶纯为五个单层厚的条件。通过光谱学对反应不同阶段获得的所有样品进行了表征，这使得能够在片晶形成之前识别高温、幻数尺寸团簇的存在。
