Colloidal solution of silver nanoparticles for label-free colorimetric sensing of ammonia in aqueous solutions.

Colloidal solution of silver nanoparticles for label-free colorimetric sensing of ammonia in aqueous solutions.
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DOI:
10.3762/bjnano.9.48
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发表时间:
2018
影响因子:
3.1
通讯作者:
Manno D
Manno D
中科院分区:
材料科学3区
文献类型:
--
作者:
Buccolieri A;Serra A;Giancane G;Manno D

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在浓度范围为 10−2 至 103 ppm 的糖和氨 (NH3) 存在下合成银纳米粒子,以开发水溶液中 NH3 的光学传感器。通过紫外可见吸收分析和 TEM 观察确定,氨以浓度依赖性方式影响所获得的纳米颗粒的特性。结构和形态分析为生产比色无标记氨传感器提供了基础。总体而言,当氨浓度升高时,表面等离子体共振增强,尽管在整个研究的氨浓度范围内功能趋势并不相同。已经确定了三个不同的范围:0.01 至 0.2 ppm 的极低氨浓度,20 至 350 ppm 的高氨浓度,以及最重要的是,0.5 至 10 ppm 的氨的中间或生理范围。
Silver nanoparticles were synthesized in the presence of saccharides and ammonia (NH3) in the concentration range from 10−2 to 103 ppm to develop an optical sensor for NH3 in aqueous solutions. Ammonia affects the features of the nanoparticles obtained in a concentration-dependent manner as determined by UV–vis absorption analysis and TEM observations. Structural and morphological analysis provides the basis for the production of a colorimetric label-free sensor for ammonia. Overall, surface plasmon resonance increases when ammonia concentration rises, although the functional trend is not the same over the entire investigated ammonia concentration range. Three different ranges have been identified: very low ammonia concentrations from 0.01 to 0.2 ppm, high ammonia concentrations from 20 to 350 ppm and, most importantly, the intermediate or physiological range of ammonia from 0.5 to 10 ppm.
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