Ion-in-Conjugation: Squaraine as an Ultrasensitive Ammonia Sensor Material

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• 作者：Xin Xiao ; Xue-Feng Cheng ; Xiang Hou ; Jing-Hui He ; Qing-Feng Xu ; Hua Li ; Na-Jun Li ; Dong-Yun Chen and Jian-Mei Lu
• 刊名：Small
• 出版年：2017
• 出版时间：January 11, 2017
• 年：2017
• 卷：13
• 期：2
• 全文大小：1135K
• ISSN：1613-6829

文摘

An organic thin-film gas sensor based on squaraine detects ammonia as low as 40 ppb with impressive reversibility and stability. The resonance-stabilized zwitterionic characteristics offer squaraines high affinity and sensitivity toward electron-rich analytes without irreversible chemical binding, while the embedded squaric ring makes SA-CH₃ highly sensitive. The symmetric molecular geometry and good crystallinity also contribute to the high performance.