Chirally assembled plasmonic metamolecules from intrinsically chiral nanoparticles  

作　　者：Jiahao Pan Xiaoyao Wang Jinjin Zhang Qin Zhang Qiangbin Wang Chao Zhou 

机构地区：[1]School of Nano-Tech and Nano-Bionics,University of Science and Technology of China,Hefei 230026,China [2]CAS Key Laboratory of Nano-Bio Interface,Suzhou Key Laboratory of Functional Molecular Imaging Technology,Division of Nanobiomedicine and i-lab,Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Suzhou 215123,China [3]Nano Science and Technology Institute,University of Science and Technology of China,Suzhou 215123,China [4]Jiangsu Key Laboratory of Thin Films,School of Physical Science and Technology,Soochow University,Suzhou 215006,China [5]College of Materials Sciences and Opto-Electronic Technology,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Nano Research》2022年第10期9447-9453,共7页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.21977112,and 21934007);the Natural Science Foundation of Jiangsu Province(No.BK20190227);the Strategic Priority Research Program of Chinese Academy of Sciences(No.XDB36000000);the Science and Technology Project of Suzhou(No.SZS201904).

摘　　要：Significant chiroptical responses could be generated by chiral coupling of achiral plasmonic nanoparticles,or originated from intrinsically chiral plasmonic nanoparticles.Here we create dimeric plasmonic metamolecules possessing both chiral coupling between nanoparticles and intrinsic chiroptical responses derived from nanoparticles themselves.These plasmonic metamolecules are prepared by assembling helical plasmonic nanorods(HPNRs)with intrinsic chirality in chiral manners on DNA origami template.Two HPNRs with the same or opposite chirality,or one HPNR and one achiral gold nanorod,are coupled chirally into dimeric metamolecules with intriguing plasmonic circular dichroism(PCD).We found that both of the intrinsic chirality of constituent HPNRs and the chiral coupling contribute to the overall PCD while their weights are different in different metamolecules and vary in different wavelength range for a certain metamolecule.Comparing to conventional chiral plasmonic metamolecules from achiral nanoparticles,or discrete chiral nanoparticles,these metamolecules bring more dimensions for tailoring chiroptical responses and make it more flexible to design plasmonic nanodevices with custom PCD.

关 键 词：chiral plasmonics DNA origami plasmonic circular dichroism gold nanoparticle 

分 类 号：O62[理学—有机化学]