Nanoengineered materials can embody distinct atomic structures which deviate from that of the bulk‐grain counterpart and induce significantly modified electronic structures and physical/chemical properties. The phonon structure and thermal properties, which can also be potentially modulated by the modified atomic structure in nanostructured materials, however, are seldom investigated. Employed here is a mild approach to fabricate nanostructured PbBi_2nTe_1+3n using a solution‐synthesized PbTe‐Bi₂Te₃ nano‐heterostructure as a precursor. The as‐obtained monoliths have unprecedented atomic structure, differing from that of the bulk counterpart, especially the zipper‐like van der Waals gap discontinuity and the random arrangement of septuple‐quintuple layers. These structural motifs break the lattice periodicity and coherence of phonon transport, leading to ultralow thermal conductivity and excellent thermoelectric z T.

中文翻译：

---

在低温处理的纳米结构PbBi2nTe1 + 3n中创建类似拉链的范德华间隙不连续性：增强的声子散射和改进的热电性能

纳米工程材料可以体现出与大颗粒对应物不同的独特原子结构，并诱导显着改变的电子结构和物理/化学性质。然而，很少研究声子结构和热性质，其也可以通过纳米结构材料中的改性原子结构来潜在地调节。这里采用的是一种温和的方法，该方法使用溶液合成的PbTe-Bi ₂ Te ₃来制造纳米结构的PbBi _{2 n} Te _{1 + 3 n。}纳米异质结构作为前体。所获得的整体结构具有前所未有的原子结构，与本体结构不同，尤其是类似拉链的范德华间隙不连续性和六至五层的随机排列。这些结构基序打破晶格周期和声子传输的相干性，从而导致超低热导率和优异的热电ž  Ť。