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Gold nanostructures for the sensing of pH using a smartphone

机译：使用智能手机对pH感测的金纳米结构

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Recently, metal nanostructures have been found to be capable of recognizing small changes in their surrounding environment, which can be utilized as significant sensing tools. In this study, we demonstrated colorimetric sensing of pH by gold nanostructures (GNs) using a simple smartphone. An indigenously developed Android app based on the CIELab 1931 analysis, which could run in a smartphone, was used for the precise determination of the pH value of liquid media. The pH value of an unknown solution obtained from the developed Android app was also compared with that obtained from the conventional ratiometric technique and a commercial pH meter. In another endeavor, it was found that the synthesized GNs demonstrated a high energy transfer efficiency from a donor (namely, the rhodamine 6G, (Rh 6G)) dye. This property of the GNs can be utilized further in the future for studying different bimolecular activities within the human body. It was found that the photoluminescence (PL) of Rh 6G was quenched when it was kept in the vicinity of the synthesized GNs, which was explained in terms of the Forster energy transfer mechanism. Thus, the present study will open up a plethora of opportunities for researchers to employ the nanostructures of gold and other metals in developing low-cost and Internet of Things (IoT)-based sensing devices using only a smart phone.
机译：最近，已经发现金属纳米结构能够识别其周围环境的小变化，这可以用作显着的传感工具。在这项研究中，我们使用简单的智能手机显示了金纳米结构（GNS）的比色感测。基于CIELAB 1931分析，这可能在智能电话运行自行研制的Android应用，用于液体介质的pH值的精确测定。与从传统的比率技术和商业pH计中获得的那样，也将从开发的Android应用中获得的未知解决方案的pH值。在另一个努力中，发现合成的GNS从供体（即Rhodamine 6g，（RH 6g））染料中表现出高能量转移效率。 GNS的这种性质可以进一步用于研究人体内不同的双分子活动。发现当它保持在合成的GNS附近时，rh 6g的光致发光（PL）被猝灭，这在福尔斯特能量转移机制方面解释。因此，本研究将开辟一足的研究人员机会，以便仅使用智能手机开发低成本和其他金属的纳米结构和其他金属的纳米结构（IOT）。

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    《RSC Advances》 |2019年第59期|共8页
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  • 正文语种 eng
  • 中图分类 化学;
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