Room temperature ppb level Cl2 detection and sensing mechanism of highly selective and sensitive phthalocyanine nanowires

被引：35

作者：

Saini, Rajan ^{[1
]}

Mahajan, Aman ^{[1
]}

Bedi, R. K. ^{[1
]}

Aswal, D. K. ^{[2
]}

Debnath, A. K. ^{[2
]}

机构：

[1] Guru Nanak Dev Univ, Dept Phys, Mat Sci Lab, Amritsar 143005, Punjab, India

[2] Bhabha Atom Res Ctr, Tech Phys Div, Bombay 400085, Maharashtra, India

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2014年 / 203卷

关键词：

Phthalocyanines; Nanowires; Room temperature gas sensor; Gas sensing mechanism; INTERNAL STRUCTURE; THIN-FILMS; GAS; NANOFLOWERS; ALIGNMENT; COPPER; ZINC;

D O I：

10.1016/j.snb.2014.06.081

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Nanowires of Cu(II) 1,4,8,11,15,18,22,25-octabutoxy-29H, 31H-phthalocyanine (CuPcOC4) have been fabricated onto the glass substrate by using low cost self-assembly technique. It has been demonstrated that these nanowires were highly sensitive and selective towards Cl-2 at room temperature with minimum detection limit of 5 ppb. The response of nanowires was found to increase linearly (91-670%) with increase in Cl-2 concentration (5-1500 ppb). The adsorption of Cl-2 on nanowires surface has followed Elovich equation. Raman spectroscopic and XPS studies revealed that central metal ions of CuPcOC4 molecules were the predominant sites of Cl-2 absorption. The results emphasized that these nanowires can be promising candidates for room temperature Cl-2 sensing applications. (C) 2014 Elsevier B. V. All rights reserved.

引用

页码：17 / 24

页数：8

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