Chandra Kavita, Kumar Vished, Werner Stephanie E, Odom Teri W
Department of Materials Science and Engineering and Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States.
Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pashan, Pune 411008, India.
ACS Omega. 2017 Aug 23;2(8):4878-4884. doi: 10.1021/acsomega.7b00871. eCollection 2017 Aug 31.
This article describes the stabilization and postsynthetic separation of gold nanostars (AuNS) synthesized with a morpholine-based Good's buffer, 3-(-morpholino)propanesulfonic acid. Resuspension of AuNS in ultrapure water improved the shape stability of the particles over 30 days. We demonstrated the sorting of nanostars via rate-zonal centrifugation through a linear sucrose gradient based on branch length and number. We determined that one round of centrifugation was sufficient for separation. Also, we improved the structural homogeneity and stability of the nanoparticles through the optimization of the storage conditions and established a robust method to sort AuNS based on size and shape.
本文描述了用基于吗啉的Good's缓冲剂3-( -吗啉基)丙烷磺酸合成的金纳米星(AuNS)的稳定化及合成后分离。将AuNS重悬于超纯水中可在30多天内提高颗粒的形状稳定性。我们通过基于分支长度和数量的线性蔗糖梯度速率区带离心法展示了纳米星的分选。我们确定一轮离心就足以实现分离。此外，我们通过优化储存条件提高了纳米颗粒的结构均匀性和稳定性，并建立了一种基于尺寸和形状对AuNS进行分选的可靠方法。
