Peptide-Coated Silver Nanoparticles: Synthesis, Surface Chemistry, and pHTriggered,Reversible Assembly into Particle Assemblies

Philipp Graf; Alexandre Mantion; Annette Foelske; Annette Foelske; Admir Masˇic′; Andreas F. Thnemann; Andreas Taubert

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Peptide-Coated Silver Nanoparticles: Synthesis, Surface Chemistry, and pHTriggered,Reversible Assembly into Particle Assemblies

机译：肽包被的银纳米颗粒：合成，表面化学和pH触发，可逆地组装成颗粒组件

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Simple tripeptides are scaffolds for the synthesis and further assembly of peptide/silver nanoparticle composites. Herein, we further explore peptide-controlled silver nanoparticle assembly processes. Silver nanoparticles with a pH-responsive peptide coating have been synthesized by using a one-step precipitation/coating route. The nature of the peptide/silver interaction and the effect of the peptide on the formation of the silver particles have been studied via UV/Vis, X-ray photoelectron, and surface-enhanced Raman spectroscopies as well as through electron microscopy, small angle X-ray scattering and powder Xray diffraction with Rietveld refinement. The particles reversibly form aggregates of different sizes in aqueous solution. The state of aggregation can be controlled by the solution pH value. At low pH values, individual particles are present. At neutral pH values,small clusters form and at high pH values, large precipitates are observed.

机译：简单的三肽是用于肽/银纳米颗粒复合物的合成和进一步组装的支架。在本文中，我们进一步探索了肽控制的银纳米颗粒组装过程。具有pH响应肽涂层的银纳米颗粒已经通过一步沉淀/涂覆途径合成。通过紫外/可见光，X射线光电子和表面增强拉曼光谱以及电子显微镜，小角度X研究了肽/银相互作用的性质以及肽对银颗粒形成的影响。 Rietveld精制的X射线散射和粉末X射线衍射。颗粒在水溶液中可逆地形成不同尺寸的聚集体。聚集状态可以通过溶液的pH值来控制。在低pH值下，存在单个颗粒。在中性pH值下，会形成小的团簇;在高pH值下，会观察到大的沉淀。

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来源
《Chemistry: A European journal》 |2009年第23期|共14页
作者
Philipp Graf; Alexandre Mantion; Annette Foelske; Annette Foelske; Admir Masˇic′; Andreas F. Thnemann; Andreas Taubert;
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正文语种 eng
中图分类应用化学;
关键词
hybrid materials; nanoparticles; oligopeptides; pH; silver;

机译：杂化材料;纳米颗粒;寡肽;pH;银;

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Peptide-Coated Silver Nanoparticles: Synthesis, Surface Chemistry, and pHTriggered,Reversible Assembly into Particle Assemblies

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