This article presents the influence of capping ligand and surface interaction types on the coarsening or reshaping behavior of surface-immobilized gold nanoparticles with different core size and shape. The morphological transformation of gold nanoparticles and nanorods on graphene oxide upon heating at temperatures ranging from 50 to 200 °C was investigated. The aggregation and coarsening behaviors of spherical nanoparticles on graphene oxide were slightly affected by the core size of nanoparticles (~ 1, 3, and 10 nm). The comparison of two different surface ligands revealed that glutathione ligands provide much better protection than cetyltrimethylammonium bromide ligands against the morphological transformation of nanoparticles. In addition, the evaluation of surface binding interactions indicated that the attachment of nanoparticles and nanorods onto graphene oxide with additional thiol functional groups could improve the immobilization of particles and therefore decelerate coarsening and reshaping of nanoparticle and nanorods.

中文翻译：

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金纳米颗粒在氧化石墨烯上的形态转化：封端配体和表面相互作用的影响。

本文介绍了封端配体和表面相互作用类型对具有不同核尺寸和形状的表面固定金纳米颗粒的粗化或重塑行为的影响。研究了在50至200°C的温度下加热时，金纳米颗粒和纳米棒在氧化石墨烯上的形态转化。球形纳米颗粒在氧化石墨烯上的聚集和粗化行为受纳米颗粒核心尺寸（〜1、3和10 nm）的影响很小。两种不同表面配体的比较表明，谷胱甘肽配体对十六烷基三甲基溴化铵配体的纳米颗粒形态转化提供了更好的保护。此外，