...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Bionanofabrication of Ordered Nanoparticle Arrays:Effect of Particle Properties and Adsorption Conditions
【24h】

Bionanofabrication of Ordered Nanoparticle Arrays:Effect of Particle Properties and Adsorption Conditions

机译：有序纳米粒子阵列的Bionanofabrication：粒子性质和吸附条件的影响。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Arrays of Au nanoparticles were created using the inherent repeating patterns of bacterial S-layer proteins.Bacterial self-assembling S-layer protein lattices display a highly repetitive surface structure that makes them particularly suitable as biotemplates to fabricate metallic/semiconducting nanostructures and arrays.One interesting S-layer for nanoparticle templating is the hexagonally packed intermediate (HPI) layer of Deinococcus radiodurans.This S-layer,displaying hexagonal (p6) symmetry,is comprised of a hexameric protein core unit with a central pore,surrounded by six relatively large openings ("vertex points").In this work,the influences of particle properties and adsorption conditions on the formation of ordered arrays of 5-nm Au nanoparticles using HPI S-layers were investigated.Using transmission electron microscopy (TEM),it was found that the templating of citrate-capped Au nanoparticles on HPI layers under low ionic strength conditions resulted in hexagonal-packed ordered arrays with approx 18-nm interparticle spacings that corresponded with the pore-to-pore distance of the S-layer.Interestingly,nanoparticle binding occurs at the vertex points on the HPI layer and,due to repulsion forces,adsorption tends to be faVored at every second vertex point.Upon increasing the ionic strength,ordered packing is still observed.However,because interparticle repulsions are less prominent,adsorption of nanoparticles occurs in virtually every available vertex point,resulting in the formation of a honeycomb-like pattern of nanoparticles extending throughout the HPI monolayer sheet.Combined with the results of additional investigations using either uncharged hydroxy-terminated particles or positively charged ferritin molecules,the experimental data suggest that the creation of ordered arrays through biotemplating of Au nanoparticles onto HPI S-layers depends on the electrostatic interactions between individual nanoparticles as well as the interaction with the HPI layer.
机译：利用细菌S层蛋白固有的重复模式创建了金纳米颗粒阵列，细菌自组装S层蛋白晶格显示出高度重复的表面结构，使其特别适合用作制造金属/半导体纳米结构和阵列的生物模板。有趣的用于纳米粒子模板的S层是Deinococcus radiodurans的六方堆积中间（HPI）层。该S层显示六边形（p6）对称性，由具有中央孔的六聚蛋白核心单元组成，周围有六个相对较大的本文研究了粒子性质和吸附条件对使用HPI S层形成5nm Au纳米粒子有序排列的影响。使用透射电子显微镜（TEM）发现在低离子强度条件下在HPI层上的柠檬酸盐包覆的Au纳米颗粒的模板化导致六方堆积的有序d阵列具有大约18 nm的粒子间距，与S层的孔到孔距离相对应。有趣的是，纳米粒子结合发生在HPI层的顶点，并且由于排斥力，吸附趋于被促进在每个第二个顶点处。随着离子强度的增加，仍然观察到有序的堆积。但是，由于颗粒间排斥力不太明显，因此几乎在每个可用的顶点处都发生了纳米颗粒的吸附，从而形成了蜂窝状纳米颗粒结合使用不带电荷的羟基封端的颗粒或带正电的铁蛋白分子进行的其他研究的结果，实验数据表明，通过将金纳米颗粒生物模板到HPI S层上来创建有序阵列取决于各个纳米粒子之间的静电相互作用以及与HPI层的相互作用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号