title: DNA-directed gold nanodimers with tailored ensemble surface-enhanced Raman scattering properties.
abstract: Gold nanodimers (GNDs) are assembled with high uniformity as ideal surface-enhanced Raman scattering (SERS) substrates through DNA-directed self-assembly of gold nanoparticles. The interparticle distance within GNDs is precisely tailored on the order of a few nanometers with changing the molecule length of DNA bridge. The ensemble SERS activity of monodispersed GNDs is then rationally engineered by modifying the structural parameters of GNDs including the particle size and interparticle distance. Theoretical studies on the level of single GND evidence the particle size- and interparticle-distance-dependent SERS effects, consistent with the ensemble averaged measurements.
authors.affiliation: Division of Nanobiomedicine and ‡i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences , Suzhou 215123 China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Lan
authors.forename: Zhong
authors.initials: Z
authors.lastname: Chen
authors.forename: Xuxing
authors.initials: X
authors.lastname: Lu
authors.forename: Gaole
authors.initials: G
authors.lastname: Dai
authors.forename: Weihai
authors.initials: W
authors.lastname: Ni
authors.forename: Qiangbin
authors.initials: Q
authors.lastname: Wang
mesh_terms: D004247:DNA / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D008962:Models, Theoretical; D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D013059:Spectrum Analysis, Raman; D013499:Surface Properties
chemical_list: D006046:Gold; D004247:DNA