Carbon-based microassemblies (CMs) have attracted significant attention in numerous applications due to their unique hierarchical structures and delicate building blocks, especially when hollow carbon spheres (HCSs) are reasonably introduced into the construction. Herein, a new design for novel HCSs-combined CMs is proposed. Remarkably, the HCSs are linear carbon bubbles linked one-by-one, arranging into necklaces decorating on the graphene microfolds. Detailed thermal analysis confirm that high temperatures straighten the linked carbon bubbles into bamboo-like carbon nanofibers, evidently due to the attenuation of doping degree. Benefiting from the abundant active sites of carbon bubbles, the obtained CMs exhibit satisfactory electrocatalytic activity for oxygen reduction reactions. This work establishes a bridge to precisely control the synthesis of carbon-based hierarchical architectures.

碳基微型组件（CM）由于其独特的层次结构和精致的构造块而在众多应用中引起了广泛的关注，特别是在将空心碳球（HCS）合理地引入构造中时。在此，提出了一种新颖的HCS-组合CM的新设计。值得注意的是，HCS是线性碳泡，它们之间是一对一连接的，排列成装饰在石墨烯微褶皱上的项链。详细的热分析证实，高温明显会使掺杂程度降低，从而使连接的碳气泡变直成竹状碳纳米纤维。得益于丰富的碳气泡活性位，所得的CM对氧还原反应表现出令人满意的电催化活性。