Dendritic PbTe microstructures were successfully obtained by a simple potentiostatic electrodeposition route from an electrolyte consisting of Pb(NO₃)₂, Na₂TeO₃ and HNO₃ at room temperature. Different from Xiao's report (Electrochimica Acta, 2006, 52, 1101), in which the effects of the deposition potential and original concentrations of Pb and Te sources on the film composition and microstructure of PbTe obtained from an acidic nitrate bath were investigated, our research mainly focused on the discussion of the role of HNO₃ in the formation of PbTe dendrites. Experiments uncovered that some experimental parameters, including the deposition potential, the time and the additive, only slightly affected the formation of PbTe dendrites in the presence of HNO₃ at a certain concentration. Also, no PbTe dendrites were obtained under the same deposition conditions after HNO₃ had been replaced by other strong acids such as HCl, H₂SO₄ and HClO₄, implying that HNO₃ played a crucial role in the formation of dendritic PbTe microstructures. Obviously, the present work is of great significance in directing the fast electrodeposition of dendritic PbTe microstructures in practical applications.

中文翻译：

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HNO ₃在树状PbTe微结构的电化学沉积中 的作用

通过简单的恒电位电沉积途径，在室温下从由Pb（NO ₃）₂，Na ₂ TeO ₃和HNO ₃组成的电解质中成功获得了树枝状PbTe微观结构。从肖的报告（不同Electrochimica ACTA，2006，52，1101），其中，所述沉积电势和原始浓度对膜组合物，并从酸性硝酸盐浴得到的PbTe的微观结构的Pb和Te源的影响进行了研究，我们的研究主要集中讨论HNO ₃的作用在PbTe树枝状晶体的形成中。实验发现，在一定浓度的HNO ₃存在下，包括沉积电势，时间和添加剂在内的一些实验参数仅对PbTe树枝状晶体的形成有轻微的影响。同样，在用其他强酸（例如HCl，H ₂ SO ₄和HClO _4）代替HNO ₃之后，在相同的沉积条件下没有获得PbTe树枝状晶体，这表明HNO ₃在形成树枝状PbTe微观结构中起着至关重要的作用。显然，目前的工作对于指导树枝状PbTe微结构的快速电沉积在实际应用中具有重要意义。