Acharya Tirtha Raj, Lee Geon Joon, Choi Eun Ha
Department of Electrical and Biological Physics, Kwangwoon University, Seoul 01897, Korea.
Plasma Bioscience Research Center, Kwangwoon University, Seoul 01897, Korea.
Nanomaterials (Basel). 2022 Jul 11;12(14):2367. doi: 10.3390/nano12142367.
Citrate-capped silver nanoparticles () were synthesized by a simple plasma-assisted reduction method. Homogenous colloidal solutions were produced by treating a AgNO3-trisodium citrate-deionized water with an atmospheric-pressure argon plasma jet. The plasma-synthesized exhibited quasi-spherical shape with an average particle diameter of about 5.9-7.5 nm, and their absorption spectra showed surface plasmon resonance peaks at approximately 406 nm. The amount of increased in a plasma exposure duration-dependent manner. Plasma synthesis of was more effective in the 8.5 cm plume jet than in the shorter and longer plume jets. A larger amount of were produced from the 8.5 cm plume jet with a higher pH and a larger number of aqua electrons, indicating that the synergetic effect between plasma electrons and citrate plays an important role in the plasma synthesis of . Plasma-assisted citrate reduction facilitates the synthesis of , and citrate-capped nanoparticles are stabilized in an aqueous solution due to their repulsive force. Next, we demonstrated that plasma-synthesized exhibited a significant degradation of methylene blue dye.
通过一种简单的等离子体辅助还原方法合成了柠檬酸包覆的银纳米颗粒（）。通过用大气压氩等离子体射流处理硝酸银 - 柠檬酸三钠 - 去离子水来制备均匀的胶体溶液。等离子体合成的颗粒呈现准球形，平均粒径约为5.9 - 7.5纳米，其吸收光谱在约406纳米处显示表面等离子体共振峰。颗粒的数量以等离子体暴露持续时间依赖的方式增加。在8.5厘米羽流射流中进行等离子体合成颗粒比在较短和较长的羽流射流中更有效。从8.5厘米羽流射流中产生了大量具有较高pH值和大量水合电子的颗粒，这表明等离子体电子与柠檬酸之间的协同作用在颗粒的等离子体合成中起重要作用。等离子体辅助的柠檬酸还原促进了颗粒的合成，并且由于其排斥力，柠檬酸包覆的纳米颗粒在水溶液中得以稳定。接下来，我们证明了等离子体合成的颗粒对亚甲基蓝染料表现出显著的降解作用。
