Room temperature ammonia sensor based on jaw like bis-porphyrin molecules

被引：28
|
作者：
Garg, Kavita [1 ]
Singh, Ajay [2 ]
Majumder, Chiranjib [3 ]
Nayak, Sandip K. [1 ]
Aswal, Dinesh K. [2 ]
Gupta, Shiv K. [2 ]
Chattopadhyay, Subrata [1 ]
机构：
[1] Bhabha Atom Res Ctr, Bio Organ Div, Bombay 400085, Maharashtra, India
[2] Bhabha Atom Res Ctr, Tech Phys Div, Bombay 400085, Maharashtra, India
[3] Bhabha Atom Res Ctr, Div Chem, Bombay 400085, Maharashtra, India
来源：
ORGANIC ELECTRONICS | 2013年 / 14卷 / 04期
关键词：
Porphyrin; Chemi-resistive sensor; Thin films; Organic semiconductors; LANGMUIR-BLODGETT-FILMS; GAS; TETRAPHENYLPORPHYRIN; TRANSISTORS; BLEND;
D O I：
10.1016/j.orgel.2013.01.033
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A jaw-like bis-porphyrin (bis-TPP) molecule was synthesized anchoring of two porphyrin molecules to a benzene ring at the meta positions through the ester linkage. The bis-TPP molecule and its zinc-derivative (Zn-bis-TPP) were spin-coated on glass surfaces to construct two chemiresistive room temperature NH3 gas sensors. Both the films showed high selectivity, reproducibility and reversibility in sensing NH3 gas (5-40 ppm) in air. The sensing characteristics of the Zn-bis-TPP films (response (2 s) and recovery (2.5 min) times; linear response (952%)) were better than that of the bis-TPP films (response (8 s) and recovery (7.5 min) times; linear response (131%)). This is attributed to the amorphous nature of the former. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：1189 / 1196
页数：8
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