BioNanotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology, P.O. Box 115, Yuseong-gu, Daejeon 305-600, South Korea.
J Colloid Interface Sci. 2011 Aug 15;360(2):335-40. doi: 10.1016/j.jcis.2011.05.008. Epub 2011 May 10.
We report an enzymatic method to control the plasmon resonance absorbance of gold nanoparticle (AuNP) arrays assembled on hyaluronic acids. While multiple electrostatic interactions between cysteamine on the AuNPs and the carboxylic acid residues in the whole intact hyaluronic acid induced the formation of large aggregates, precise control of the plasmon absorbance was possible by tailoring the size of the bio-polymeric templates with hyaluronidase, almost over the entire range of the resonant coupling wavelengths. It was possible to precisely tune the position of the second plasmon absorbance by manipulating the amount of the template and the enzymatic hydrolysis time. Finally, we were able to produce a chain-like array of AuNPs, which was nearly one dimensional, with a maximum shift of up to 189 nm in the plasmon absorbance at the optimal hydrolysis time of the templates. This enzymatic method can be used as a useful tool to tailor the plasmonic properties of the nanostructures required for specific applications.
我们报告了一种酶法来控制组装在透明质酸上的金纳米粒子（AuNP）阵列的等离子体共振吸收。虽然 AuNP 上的半胱氨酸和整个完整透明质酸中的羧酸残基之间的多种静电相互作用诱导了大聚集体的形成，但通过透明质酸酶对生物聚合物模板的尺寸进行精确控制，几乎可以在整个共振耦合波长范围内实现等离子体吸收的精确调节。通过操纵模板的量和酶解时间，可以精确调节第二等离子体吸收的位置。最后，我们能够制备出具有最大等离子体吸收最大位移高达 189nm 的 AuNP 链状阵列，该位移在模板的最佳水解时间下产生。这种酶法可作为一种有用的工具，用于调整特定应用所需的纳米结构的等离子体特性。
