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Multifarious colloidal structures: new insight into ternary and quadripartite ordered assemblies
Nanoscale ( IF 5.8 ) Pub Date : 2021-09-14 , DOI: 10.1039/d1nr05635b James B Stahley 1 , Mehdi B Zanjani 1
Nanoscale ( IF 5.8 ) Pub Date : 2021-09-14 , DOI: 10.1039/d1nr05635b James B Stahley 1 , Mehdi B Zanjani 1
Affiliation
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DNA-mediated assembly of colloidal particles can be utilized to produce a variety of structures which may have desirable phononic, photonic, or electronic transport properties. Recent developments in linker-mediated assembly processes allow for interactions to be coordinated between many different types of colloidal particles more easily and with fewer unique sequences than direct hybridization. However, the dynamics of colloidal self-assembly becomes increasingly more complex when coordinating interactions between three or more distinct interacting elements. In such cases particle pairs with similar binding energies are allowed to interact unpredictably, and enthalpically degenerate binding sites will be noticeably more present while numerous secondary phases may also result from the self-assembly process. Therefore, it is necessary to develop procedures for predicting feasible superstructure geometries for these systems before they can be implemented in material design. Here we investigate the formation of multifarious ordered structures through self-assembly of multiple types of spherically symmetrical colloidal particles with a variety of interaction matrices. We utilize Molecular Dynamics (MD) simulations to study the growth behavior of systems with different types of interacting elements and different particle sizes, and also predict the formation and stability of the target structures. We also study the phononic spectra of various ternary structures in order to identify the influence of key structural parameters on phonon bandgap frequencies and ranges. Our results provide direct guidelines for designing ternary and quadripartite multifarious colloidal structures, and motivate new directions for future experimental work to target formation of multi-component colloidal superstructures beyond the well-established binary symmetries studied in the past.
中文翻译：
多种胶体结构：对三元和四元有序组装的新见解
DNA 介导的胶体粒子组装可用于产生多种结构，这些结构可能具有所需的声子、光子或电子传输特性。接头介导的组装过程的最新发展允许在许多不同类型的胶体颗粒之间更容易地协调相互作用，并且比直接杂交具有更少的独特序列。然而，当协调三个或更多不同相互作用元素之间的相互作用时，胶体自组装的动力学变得越来越复杂。在这种情况下，具有相似结合能的粒子对被允许不可预测地相互作用，并且焓简并结合位点将明显更多地存在，而自组装过程也可能产生许多第二相。所以，在材料设计中实施之前，有必要制定程序来预测这些系统的可行上部结构几何形状。在这里，我们研究了通过多种类型的球对称胶体粒子与各种相互作用矩阵的自组装来形成多种多样的有序结构。我们利用分子动力学 (MD) 模拟来研究具有不同类型相互作用元素和不同粒径的系统的生长行为，并预测目标结构的形成和稳定性。我们还研究了各种三元结构的声子谱，以确定关键结构参数对声子带隙频率和范围的影响。
更新日期：2021-09-24
中文翻译：
多种胶体结构：对三元和四元有序组装的新见解
DNA 介导的胶体粒子组装可用于产生多种结构，这些结构可能具有所需的声子、光子或电子传输特性。接头介导的组装过程的最新发展允许在许多不同类型的胶体颗粒之间更容易地协调相互作用，并且比直接杂交具有更少的独特序列。然而，当协调三个或更多不同相互作用元素之间的相互作用时，胶体自组装的动力学变得越来越复杂。在这种情况下，具有相似结合能的粒子对被允许不可预测地相互作用，并且焓简并结合位点将明显更多地存在，而自组装过程也可能产生许多第二相。所以，在材料设计中实施之前，有必要制定程序来预测这些系统的可行上部结构几何形状。在这里，我们研究了通过多种类型的球对称胶体粒子与各种相互作用矩阵的自组装来形成多种多样的有序结构。我们利用分子动力学 (MD) 模拟来研究具有不同类型相互作用元素和不同粒径的系统的生长行为，并预测目标结构的形成和稳定性。我们还研究了各种三元结构的声子谱，以确定关键结构参数对声子带隙频率和范围的影响。
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