关于硝酸胍的巨大形变与铁电性
On the giant deformation and ferroelectricity of guanidinium nitrate
AI总结：
本文质疑Karothu等人将硝酸胍认定为铁电半导体有机晶体的结论，指出其铁电性和半导体性缺乏实验证实，且因晶体易产生缺陷导致大行程可重复性存疑，同时指出此前相关研究未被充分承认。
摘要：
材料在相变过程中伴随的非凡性质从科学研究和新型应用的角度来看都令人兴奋。最近，Karothu等人[1]将硝酸胍（[C(NH2)3]+[NO3]-，以下简称GN）描述为一种具有优异致动性能的铁电半导体有机晶体。然而，这种有机-无机杂化材料的铁电性和半导体性质并未得到实验结果的证实，并且与一级相变相关的大行程的可重复性也值得怀疑，因为GN晶体本身容易形成缺陷。此外，此前关于GN的大量研究也未被承认。
英文摘要：
The extraordinary properties of materials accompanying their phase transitions are exciting from the perspectives of scientific research and new applications. Most recently, Karothu et al.1 described guanidinium nitrate, [C(NH2)3]+[NO3]-, hereafter GN, as a ferroelectric semiconducting organic crystal with exceptional actuating properties. However, the ferroelectric and semiconducting properties of this hybrid organic-inorganic material were not confirmed by the experimental results, and the reproducibility of the large stroke associated with the first-order transition is questionable, because the GN crystals are inherently susceptible to the formation of defects. Besides, previous extensive studies on GN were not acknowledged.
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