title: Subdiffraction-limited plasmonic imaging with anisotropic metal nanoparticles.
abstract: We have developed a high-resolution nonfluorescent imaging method based on superlocalization of gold nanorods (AuNRs). By taking advantage of their anisotropic optical property of the plasmonic scattering of AuNRs, selective imaging of only a fraction of AuNRs can be achieved by rotating the sample relative to the linear polarized illumination under cross-polarization microscopy with a high NA objective. The AuNR positions obtained from a series of images could then be used to reconstruct the overall image. Two AuNRs with center-to-center distances of 80 nm were successfully resolved. This simple but deterministic super-resolution imaging technique can potentially be used to fingerprint optically anisotropic metal nanoparticles and their assemblies for labeling, sensing, and encryption applications.
authors.affiliation: State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, College of Biology, Hunan University , Changsha 410082, P. R. China.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Cheng
authors.forename: Dinggui
authors.initials: D
authors.lastname: Dai
authors.forename: Dong
authors.initials: D
authors.lastname: Xu
authors.forename: Yan
authors.initials: Y
authors.lastname: He
authors.forename: Edward S
authors.initials: ES
authors.lastname: Yeung
mesh_terms: D006046:Gold / Q000737:chemistry; D053768:Metal Nanoparticles
chemical_list: D006046:Gold