SELF-ASSEMBLY OF GOLD NANORODS ON WRINKLED TEMPLATE

다국어 초록 (Multilingual Abstract)

Self-assembly of nanoparticles has attracted more attention in the last decade due to theirpotential applications in many ¯elds, such as sensors, surface-enhanced Raman scattering (SERS)substrate and optical/plasmonic components. Wrinkles, as one kind of common natural surface,are used to be a template/substrate in micro°uidic sieves and solar cells. In this work, a wrinkledtemplate with depth of about 200 nm and period of 1.64 ? m is used for modulating the self-assemblyprocess of gold nanorods (GNRs) to obtain patterned self-assemblies for potential application. Inorder to fully re°ect the role of the wrinkled template in the self-assembly, the templates are placeduprightly in the GNRs solution to intensify the interplay between the wrinkled surface andnanorods. The self-assembly process is carried out in a climate chamber, where the temperatureand humidity can be controlled programmingly to modulate the self-assembly conditions. Theexperimental results show that for the ¯xed wrinkled template, an obvious e®ect on the self-assembly is at the temperature range from 30?C to 50?C. Nematic, curved (mostly are end-to-end)and transition mode can be obtained. According to humidity, GNRs tend to form the nematicfashion in humidity lower than 60%, and the curved fashion in a higher humidity.

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