报告题目：Design and investigation of liquid crystal superlattice forming gold nanoparticles – a route to plasmonic metamaterials

报告人：Georg Hans Mehl教授（英国赫尔大学University of Hull）

地点：校行政楼一楼报告厅

时间：2014年11月24日（周一）下午3点-4点

讲座摘要：

Metallic nanoparticles (NPs), in most cases gold (Au) NPs, are currently exploited in a wide range of applications which rely on their plasmonic resonances. This ranges from molecular biosensing to solar energy conversion or cancer phototherapy. Forming dense arrangements of such resonant structures allows the creation of artificial composites, termed metamaterials. They promise to generate materials properties unavailable to their constituents. Approaches based on the self-assembly of metal NPs permit potentially the convenient generation of bulk metamaterials. For such a purpose the use of liquid crystal (LC) systems is very promising. Important is not only to generate LC-NP nanocomposites synthetically but also to address the density of NPs and their spatial assembly in the compositions.

Means of controlling the size of the NPs as well as the size of the organic corona via a range of synthetic approaches will be presented, as will be their effect on the particle packing and the phase structures. Based on these results the design and investigation of a LC-NP nanocomposite with plasmonic metamaterial properties will be presented.

Mehl教授简介：

Georg Mehl obtained his Master degree (Dipl. Chem.) in Chemistry and his PhD at the University of Freiburg (Germany) in the group of Prof. H. Finkelmann.

He joined the Liquid Crystal group in Hull as a Post-Doc (with Prof. J. W. Goodby) and is currently Professor (Chair) for Organic and Materials Chemistry. He has held the DERA/Qinetiq Lectureship at Hull and visiting Professorships at the universities of Patras (Greece) and Marseille-Luminy (France).

His research interests are in functional soft self assembling systems, particularly in organic-inorganic nano-composites with a focus on optical properties and in photoactive systems. Prof. Georg Mehl has an exceptional publication record, with many high‐impact papers including some in Nat. Commun., Angew. Chem. Int. Ed. and J. Am. Chem. Soc.. His H-factor is 27.