Koenig Gary M, Gettelfinger Brian T, de Pablo Juan J, Abbott Nicholas L
Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
Nano Lett. 2008 Aug;8(8):2362-8. doi: 10.1021/nl801180c. Epub 2008 Jun 26.
We report that localized surface plasmon resonances (LSPRs) of gold nanodots immersed under liquid crystals (LCs) can be used to characterize adsorbate-induced ordering transitions of the LCs on the surfaces of the nanodots. The nanoscopic changes in ordering of the LCs, as measured by LSPR, were shown to give rise to macroscopic ordering transitions of the LCs that were observed by polarized light microscopy. The results reported herein suggest that (i) LCs may be useful for enhancing the sensitivity of LSPR-based detection of binding events and (ii) that LSPR measurements of gold nanodots provide a means to characterize the nanoscopic origins of macroscopic, adsorbate-induced LC ordering transitions.
我们报道，浸没在液晶（LC）中的金纳米点的局域表面等离子体共振（LSPR）可用于表征纳米点表面吸附质诱导的液晶有序转变。通过LSPR测量的液晶有序的纳米级变化被证明会导致通过偏振光显微镜观察到的液晶宏观有序转变。本文报道的结果表明：（i）液晶可能有助于提高基于LSPR的结合事件检测的灵敏度；（ii）金纳米点的LSPR测量提供了一种表征宏观的、吸附质诱导的液晶有序转变的纳米级起源的方法。
