Impact of Congo red dye in nano-porous silicon as pH-sensor

被引：15
|
作者：
Kashyout, Abdel-Hady [1 ]
Soliman, Hesham [1 ]
Nabil, Marwa [1 ,2 ]
Bishara, Ahmed [2 ]
机构：
[1] City Sci Res & Technol Applicat, Adv Technol & New Mat Res Inst, Alexandria, Egypt
[2] Univ Alexandria, Fac Sci, Dept Phys, Alexandria, Egypt
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2015年 / 216卷
关键词：
Nano-porous silicon; Anisotropic alkali etching; Congo red; pH sensor;
D O I：
10.1016/j.snb.2015.03.099
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The combination of nano-porous silicon (nPS) with Congo red (CR) represents a nano-porous matrix which offer broad avenue of new and interesting properties depending on the involved materials as well as their morphology. Chemical route was utilized as the host material to achieve pores filling. They were impregnated with Congo red, which gave good results for the porous silicon as a promising pH sensor. The behavior of (nPS/CR) pH sensor, transformation of color (red-blue), is reversible after exposure to NH3 vapors, (red-blue-red). The ON/OFF behavior of the composite material depends upon the chemical processes occurring inside the pores. The fabrication of (nPS/CR) pH sensor depends on several factors{CR concentration, solvent type, and the chemical mechanism of CR adsorption on PS}. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：279 / 285
页数：7
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