Synthesis of γ-Fe2O3/SiO2/Au magnetic composites for immobilization of bovine serum albumin

Sandwich-structured Fe2O3@SiO2@Au nanoparticles with magnetoplasmonic responses

“…As mentioned earlier, the spindle structure of our g-Fe 2 O 3 @SiO 2 @Au NPs combines the plasmonic properties of both magnetic nanorods and nanoshells in a single structure. 19 This spindle geometry possesses greater structural tunability than a nanorod or a spherical nanoshell. Therefore, none of the above two studies is identical with the present study.…”

“…18 In another study, Peng et al described the synthesis of spherical g-Fe 2 O 3 /SiO 2 /Au magnetic composites with sparse Au nanoparticles on the surface of the SiO 2 layer. 19 Liz-Marza ´n et al and Ma et al have demonstrated the fabrication of spindle-like a-Fe 2 O 3 @Au NPs, respectively, using a similar layer-by-layer assembly method in combination with the seed growth method. 20,21 A continuous Au shell has been fabricated through adsorption and subsequent metallization on Au-seeded APTES-grafted silica spheres.…”

Preparation of antibiotic functionalized gold-magnetic nanoprobes and the study of their mimic peroxidase properties

“…Au-S、Au-N等化学键形成复合纳米材料. Li等 [18] 将 γ-Fe 2 O 3 /SiO 2 表面进行巯基化, 制备得到γ-Fe 2 O 3 /SiO 2 / Au. Wu等 [19] 和Lou等 [20] 通过氨基与AuNPs的共价作用 力制备得到金磁纳米材料.…”

GoldMag Composite Particles and Their Applications in Nanomedicine

“…8 The same method was applied to synthesize the smaller size assembled GoldMag particles using the γ-Fe 2 O 3 /SiO 2 composites as a core and modified with mercaptosilane, and then gold nanoparticles were attached to the surface of the γ-Fe 2 O 3 /SiO 2 composite via Au-S bonds to form γ-Fe 2 O 3 /SiO 2 / Au assembled magnetic composites. 25 Cysteine was also used to modify Fe 3 O 4 and obtain amine-functionalized particles with thiol group, then the Au nanoparticles synthesized in aqueous solution through the reduction of HAuCl 4 by NaBH 4 was conjugated to the Fe 3 O 4 particles under ultrasonic conditions. 9 Polymers such as polypyrrole (PPy) 26 and polyaniline (PANI) 27 were used as a functional linker to assemble Au nanoparticles by means of electrostatic interactions between the positive charged polymer coating and the negative charged citrate stabilized Au nanoparticles.…”