Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973-5000, USA.
Nanoscale. 2012 Apr 28;4(9):2855-8. doi: 10.1039/c2nr30479a. Epub 2012 Apr 4.
Plasmonics and photonics demand new methods for the controlled construction of nanoparticle (NP) arrays. Complex, low-symmetry configurations of DNA-functionalized NPs are obtained by connection to scaffolds of branched and folded DNA nanostructures. However, the stabilization of these branched structures by Mg(2+) counterions also drives the uncontrolled aggregation of NPs. We demonstrate, using a two-dimensional DNA scaffold, that derivatizing gold nanoparticles (AuNPs) with zwitterionic ligands overcomes this problem.
等离子体学和光子学需要新的方法来控制纳米粒子（NP）阵列的构建。通过连接到支化和折叠 DNA 纳米结构的支架，可以获得具有复杂、低对称的 DNA 功能化 NP 配置。然而，Mg(2+) 抗衡离子对这些支化结构的稳定作用也会导致 NP 的不受控制聚集。我们使用二维 DNA 支架证明，用两性离子配体衍生金纳米粒子（AuNPs）可以克服这个问题。
