title: Dry Sintering Meets Wet Silver-Ion "Soldering": Charge-Transfer Plasmon Engineering of Solution-Assembled Gold Nanodimers From Visible to Near-Infrared I and II Regions.
abstract: Achieving highly tunable and localized surface plasmon resonance up to near infrared (NIR) regions is a key target in nanoplasmonics. In particular, a self-assembly process capable of producing highly uniform and solution-processable nanomaterials with tailor-made plasmonic properties is lacking. We herein address this problem through a conjunctive use of wet Ag+soldering and dry thermal sintering to produce nanodimer-derived structures with precisely engineered charge-transfer plasmon (CTP). The sintered dimers are water soluble, featuring gradually shifted CTP spanning an 800 nm wavelength range (up to NIR II). Upon silica removal, the products are grafted by DNA to offer surface functionality. This process is also adaptable to DNA-linked AuNP dimers toward plasmonic meta-materials via DNA-guided soldering and sintering.
authors.affiliation: CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, China.
authors.forename: Lingling
authors.initials: L
authors.lastname: Fang
authors.affiliation: CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, China.
authors.forename: Yueliang
authors.initials: Y
authors.lastname: Wang
authors.affiliation: CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, China.
authors.forename: Miao
authors.initials: M
authors.lastname: Liu
authors.affiliation: Engineering and Materials Science Experiment Center, University of Science and Technology of China, Hefei, Anhui, 230027, China.
authors.forename: Ming
authors.initials: M
authors.lastname: Gong
authors.affiliation: Key Laboratory of Ion Beam Bioengineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui, 230031, China.
authors.forename: An
authors.initials: A
authors.lastname: Xu
authors.affiliation: CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, China. zhxdeng@ustc.edu.cn.
authors.forename: Zhaoxiang
authors.initials: Z
authors.lastname: Deng
keywords: DNA self-assembly; nanodimers; nanoparticles; plasmonics; sintering