Anisotropic Thermochemical Hole Burning Phenomenon on TTF-TCNQ Single Crystal

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• 作者：Chunbo Ran ; Hailin Peng ; Liang Ren ; Wei Zhou ; Yading Ling ; Zhongfan Liu
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：January 18, 2007
• 年：2007
• 卷：111
• 期：2
• 页码：631 - 635
• 全文大小：293K
• 年卷期：v.111,no.2(January 18, 2007)
• ISSN：1932-7455

文摘

A remarkable anisotropic thermochemical hole burning (THB) phenomenon was observed on TTF-TCNQcharge-transfer complex when using a STM tip to write information bits on its single-crystal surface. Suchan anisotropy of hole formation was found to be closely related to the anisotropic thermal conducting propertyof TTF-TCNQ crystal, strongly supporting a nanometer scale thermochemical reaction mechanism. Thehigh thermal conductivity of TTF-TCNQ leads to a very weak dependence of hole size on the pulse durationwithin a certain time scale, which was never observed with ammonium-TCNQ complexes. Comparativestudies using isotropic thermal conducting TEA(TCNQ)₂ complex and theoretical analyses were performedfor elucidating the unique hole burning properties of TTF-TCNQ complex. The thermal gravimetry combinedwith mass spectrometry (TG-MS) of TTF-TCNQ was also done for a detailed understanding of thethermochemical decomposition reaction.