Improved Size-Tunable Synthesis of Monodisperse Gold Nanorods through the Use of Aromatic Additives

Abstract

We report an improved synthesis of colloidal gold nanorods (NRs) by using aromatic additives that reduce the concentration of hexadecyltrimethylammonium bromide surfactant to ~0.05 M as opposed to 0.1 M in well-established protocols. The method optimizes the synthesis for each of the 11 additives studied, allowing a rich array of monodisperse gold NRs with longitudinal surface plasmon resonance tunable from 627 to 1246 nm to be generated. The gold NRs form large-area ordered assemblies upon slow evaporation of NR solution, exhibiting liquid crystalline ordering and several distinct local packing motifs that are dependent upon the NR's aspect ratio. Tailored synthesis of gold NRs with simultaneous improvements in monodispersity and dimensional tunability through rational introduction of additives will not only help to better understand the mechanism of seed-mediated growth of gold NRs but also advance the research on plasmonic metamaterials incorporating anisotropic metal nanostructures.

Packing and self-assembly of truncated triangular bipyramids

“…The phases expected for such colloidal systems can be predicted through theoretical and computational studies of the corresponding hard particle system. Recent breakthroughs in the synthesis of colloidal particles of various shapes [11][12][13][14][15][16][17][18][19][20][21][22][23] have spurred an increased interest in studies of hard particle systems.…”

Advanced AuNMs as nanomedicine’s central goals capable of active targeting in both imaging and therapy in biomolecules

“…These insights into the mechanism of DNA-guided AuNMs synthesis not only provide deep understanding of the interactions between the DNA and nanomaterials but also allow better control of the shapes and surface properties of many nanomaterials. Ye et al [50] (Figure 2d). When the time of flow was increased to 9 h, these structures further transformed into micro-hemispherical ones (Figure 2c).…”

A Prospective Study of Laser Treatment of Port Wine Stain Associated with Gold Nanorods

“…Gold NRs were prepared by popular seeded growth method developed by Ye et al [9,10]. And modified through replacing cytotoxic cetyltrimethylammonium bromide (CTAB) used as surfactant in the preparation of gold NRs by thiol-terminated methoxypolyethylene glycol (mPEG-SH) to reduce its cytotoxicity.…”