Shape control synthesis of multi-branched gold nanoparticles

Gold nanostars: surfactant-free synthesis, 3D modelling, and two-photon photoluminescence imaging

“…Since 2003, several ‘one-pot’ or seed-mediated synthesis methods have been employed using mainly poly( N -vinylpyrrolidone) (PVP) or cetyltrimethylammonium bromide (CTAB) as surfactant [9, 10, 21–23, 25, 26, 30, 37–41]. Silver ions were also added to improve the yield and shape owing to the underpotential deposition of silver ions on certain crystal facets of gold seeds [22–24, 39, 42, 43].…”

Application of a conproportionation reaction to a synthesis of shape-controlled gold nanoparticles

“…Fig. 1 shows the TEM images and SAED pattern of the MBGNs prepared by stirring the citrate-stabilized seed particles in the growth solution for 5 min before adding ascorbic acid [13]. Since the directions of longitudinal axes of branches 1, 2 and 3 (numbered in part b) are corresponding to the extra reflections 1, 2 and 3 in the SAED pattern (indicated by arrows in part c), respectively, it is found that the MBGNs are polycrystalline and involve branches with stacking faults along their longitudinal axes.…”

“…We recently succeeded in synthesizing polycrystalline multibranched gold nanoparticles (MBGNs) with controlled size and shape by a seeding growth method [13]. However, the growth mechanism for the MBGNs, whose shape is unusually complicating, is yet to be investigated.…”

Visible-Light-Induced Photocatalysis of 2D-Hexagonal Mesoporous SiO2–TiO2 Deposited with Au Nanoparticles

“…[20][21][22] Electron beam lithography 23 24 and electron beam induced deposition 25 16 20 27 However, the immobilization process of metal NPs on TiO 2 is normally too complicating to be applied to practical applications. 28 29 In this regard, we have recently reported simple fabrication methods for morphology and assembly controlled metal NPs using mesoporous oxide templates.…”