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在荷载的Au3+/Ag+中, pH稳定性的意想不到的增强 H 结合层次的薄膜

Nicolás Pomeraniec Altieri¹, Lucy L Coria-Oriundo¹, Paula C Angelomé²

¹Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE - CONICET) Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires Intendente Guiraldes S/N - 1er piso, Buenos Aires, Argentina. mricci@qi.fcen.uba.ar.

|July 28, 2023

概括

这项研究使用层层组装开发了稳定,结合的聚合物薄膜. 装有黄金的薄膜在广泛的pH范围内显示出增强的稳定性,而装有银的薄膜则为抗菌应用提供了潜力.

科学领域:

聚合物科学聚合物科学
材料科学材料科学材料科学
纳米技术纳米技术

背景情况:

层层自组装 (LBL) 是制造多层聚合物薄膜的一种多功能技术.
了解薄膜形成机制和稳定性对于材料应用至关重要.

研究的目的:

使用聚烯酸 (PAA) 和聚乙烯氧化物 (PEO) 合成和表征与结合的LBL薄膜.
为了研究这些LBL膜中的金 (Au) 和银 (Ag) 离子的结合和稳定性.
探索这些金属载荷薄膜在纳米粒子合成和刺激响应应用中的潜力.

主要方法:

用聚烯酸 (PAA) 和聚乙烯氧化物 (PEO) 进行层层 (LBL) 自组装.
包括PMIRRAS,QCM-D和X射线反射率 (XRR) 在内的表征技术.
pH稳定性测试和金属离子释放研究.

主要成果:

用PAA和PEO成功形成结合的LBL薄膜,由PMIRRAS和QCM-D证实.
有效地将Au和Ag离子纳入薄膜,通过XRR和PMIRRAS进行验证.
在pH值4到10之间,au载荷薄膜表现出增强的稳定性,适合生物条件.
在pH 4以上,装有Ag的薄膜分解,但在酸性pH (<3) 时释放出Ag离子,这表明抗菌纳米材料的潜力.
装有Au和Ag的薄膜都适合通过in situ降解生产金属纳米粒子.

结论:

具有结合的LBL薄膜为金属离子结合和受控释放提供了可调节的特性.
装有Au和Ag的薄膜的pH依赖性稳定性为各种应用开辟了道路,包括生物医学和抗菌材料.
开发的片作为有效的平台,用于金属纳米颗粒的现场合成.

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