1 research outputs found
Chiral Arrangements of Au Nanoparticles with Prescribed Handedness Templated by Helical Pores in Block Copolymer Films
Fabrication
of films with plasmonic nanoparticles (NPs) arrays
arranged in chiral configurations of prescribed handedness is highly
attractive for the design of new functional materials; however, this
remains a formidable challenge in nanotechnology. In this study, we
demonstrated the controlled arrangements of gold (Au) NPs into helical
structures templated by helical pores created in cross-linked block
copolymer (BCP) films. d- and l-tartaric acid (TA)
were used to direct the self-assembly of achiral poly(1,4-butadiene)-<i>b</i>-poly(ethylene oxide) BCPs into helical cylindrical morphologies
with prescribed handedness, i.e., D or L. Helical pores were generated
by BCP cross-linking followed by TA extraction. Helical Au NP arrays,
subsequently arranged within the helical pores, exhibited the chiral
optical response. The helical structures of NPs arrays and the resulting
optical handedness were tunable simply by using either D- or L-porous
templates. This simple strategy offers a straightforward pathway for
the fabrication of chiral porous BCP films and helical NPs arrays
with chiral optical properties