There has been increased interest in the production of nanoparticles (NP) through green chemistry. This article used durian fruit shell aqueous solution that acts as a reductive preparation of silver NPs. The silver nanoparticles have a size of approximately 25 nm. The NP size uniformity was determined by the SEM and TEM analysis. X-ray diffraction technique was used to characterize crystalline silver nanoparticles face-centered cubic structure. XPS spectrum showed distinct silver peaks on the nanoparticles’ surface. An optical method that was based on surface plasmon resonance (SPR) was used to perform the green Ag NPs aqueous ammonia sensing study. Optical measurement facilitated the ammonia sensing study of Ag NPs that had been prepared. The study also investigated the performance of the optical sensor, thus adding validity to the study. Also, the research sought to determine how the concentration of ammonia in ammonia sensing affects the Ag NPs that had been obtained. The study observed a linear relationship with R2 as the correlation factor which was equal to 0.9831. This was observed from the ammonia concentration plot versus absorption ratio that suggested that there was a linear increase in absorption ratio with increase in ammonia concentration. The study significance is that the room temperature optical ammonia sensor can be used in future for medical diagnosis in the detection of low levels of ammonia in biological fluid like sweat, cerebrospinal fluid, saliva, plasma, or biological samples. This enhances the application of the technique in human biomedical applications.

中文翻译：

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使用榴莲果壳合成银纳米颗粒比色检测氨

人们对通过绿色化学生产纳米颗粒 (NP) 的兴趣越来越大。本文使用榴莲果壳水溶液作为银纳米颗粒的还原制剂。银纳米颗粒的尺寸约为 25 nm。通过SEM和TEM分析确定NP尺寸均匀性。X射线衍射技术用于表征结晶银纳米粒子的面心立方结构。XPS 光谱显示纳米粒子表面有明显的银峰。基于表面等离子体共振 (SPR) 的光学方法用于进行绿色 Ag NPs 氨水传感研究。光学测量促进了已制备的 Ag NPs 的氨传感研究。该研究还调查了光学传感器的性能，从而增加了研究的有效性。还，该研究试图确定氨传感中氨的浓度如何影响已获得的 Ag NP。该研究观察到与 R2 作为相关因子的线性关系，等于 0.9831。这是从氨浓度与吸收率的关系图中观察到的，这表明吸收率随着氨浓度的增加而线性增加。研究意义在于，室温光学氨传感器未来可用于医学诊断，检测汗液、脑脊液、唾液、血浆或生物样品等生物体液中的低浓度氨。这增强了该技术在人类生物医学应用中的应用。