Platinum nanoparticles as pH sensor for intelligent packaging

A. J. Martins; M. Benelmekki; V. Teixeira; P. J. G. Coutinho

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Platinum nanoparticles as pH sensor for intelligent packaging

机译：铂纳米颗粒作为用于智能包装的pH传感器

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Pt nanoparticles were produced by reverse micelle templating using DTAB. The resulting nanoparticles showed sizes between 250nm and 500nm and formed clusters. Thioglycolic acid (TGA) was covalently attached to the nanoparticle surface as a stabilizer and as. The Pt nanoparticles were dispersed in water and the dependence of its absorvance on the pH of the solution was studied. The spectra showed surface plamon absorption band at 280nm and also red shifted bands that were attributed to clusters of nanoparticles. It was found that the fraction of cluster population depends on the pH of the aqueous solution and that the response of the Pt nanoparticles to pH variations has a memory effect (hysteresis). The possibility of using these Pt nanoparticles in smart labels for food packaging is outlined.

机译：通过使用DTAB进行反胶束模板化生产了Pt纳米颗粒。所得的纳米颗粒显示尺寸在250nm至500nm之间并形成簇。巯基乙酸（TGA）共价附于纳米颗粒表面作为稳定剂。将Pt纳米颗粒分散在水中，研究其吸水率对溶液pH值的依赖性。光谱显示了在280nm处的表面等离子体吸收带，以及归因于纳米颗粒簇的红移带。已经发现，簇群的分数取决于水溶液的pH，并且Pt纳米颗粒对pH变化的响应具有记忆效应（滞后）。概述了在智能标签中将这些Pt纳米颗粒用于食品包装的可能性。

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来源
《Journal of nano research》 |2012年第2012期|p.97-104|共8页
作者
A. J. Martins; M. Benelmekki; V. Teixeira; P. J. G. Coutinho;
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作者单位

University of Minho, Centre of Physics, Campus de Gualtar, 4710-057 Braga, Portugal;

University of Minho, Centre of Physics, Campus de Gualtar, 4710-057 Braga, Portugal;

University of Minho, Centre of Physics, Campus de Gualtar, 4710-057 Braga, Portugal;

University of Minho, Centre of Physics, Campus de Gualtar, 4710-057 Braga, Portugal;

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正文语种 eng
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关键词
nanoparticles; platinum; pH-sensor; memory effect;

机译：纳米粒子铂;pH传感器记忆效应;

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机译：铂纳米颗粒作为用于智能包装的pH传感器

Platinum nanoparticles as pH sensor for intelligent packaging

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