NDLI: A gas sensor based on natural dye-sensitized TiO thin film for pork-borne amines monitor

Content Provider	IEEE Xplore Digital Library
Author	Yanxiao Li Xiaobo Zou Xiaowei Huang Jiyong Shi Jiewen Zhao
Copyright Year	2014
Description	Author affiliation: Sch. of Food & Biol. Eng., Jiangsu Univ., Zhenjiang, China (Yanxiao Li; Xiaobo Zou; Xiaowei Huang; Jiyong Shi; Jiewen Zhao)
Abstract	China is the world's biggest market for pork in terms of production as well as consumption. The concentration of amines is a quality criterion for pork freshness. To detect the pork-borne amines quickly and noninvasively, a dye-sensitized $TiO_{2}$ thin film gas sensor was developed in this article. Firstly, $TiO_{2}$ films were deposited on glass by DC magnetron sputtering method. About 0.5μm thick of $TiO_{2}$ depositions were performed from 6mm thick targets with a diameter of 100 mm onto glass substrates with a sputtered-Au counter electrode. Secondly, the natural dyes were extracted from spinach (Spinacia oleracea), red radish (Raphanus sativus L), winter jiasmine (Jasminum nudiflorum), and black rice (Oryza sativa L. indica) by ethanol, and kept as sensitizing compounds. Thirdly, the $TiO_{2}$ film was immersed in an ethanol solution containing a natural dye for 24 h to absorb the dye on $TiO_{2}$ film adequately. Therefore, a $TiO_{2}$ thin film gas sensor was prepared. The dye sensitized $TiO_{2}$ thin film gas-sensitivity to spermine was examined at room temperature. The results indicated that, the black-rice dye, which has the highest anthocyanin among the four nature dyes, sensitized film showed excellent gas-sensitivity to spermine of 500ppb, and had good selectivity to analogy gases such as spermidine, putrscine, and cadaverine that will increase during storage. The film is good for monitoring the freshness of pork.
Starting Page	237
Ending Page	242
File Size	723860
Page Count	6
File Format	PDF
ISBN	9781479947263
DOI	10.1109/NEMS.2014.6908799
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-04-13
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Films Glass Temperature measurement Humidity Temperature sensors Monitoring Sputtering ТiO2 thin film gas sensor amines dye sensitized
Content Type	Text
Resource Type	Article

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