The Editor-in-Chief has retracted this article [1] because Figure 4 and Figure 5 appear to show cobalt oxide nanoparticles and not iron oxide nanoparticles as stated in the article. The data reported in this article are therefore unreliable.

中文翻译：

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撤回注意：尿素对Fe 3 O 4磁性纳米颗粒形态的影响及其在电位尿素生物传感器中的应用

主编撤回了这篇文章[1]，因为图4和图5似乎显示了氧化钴纳米颗粒，而不是该文章中所述的氧化铁纳米颗粒。因此，本文中报告的数据不可靠。