A new hydrosol of gold clusters. 2. A comparison of some different measurement techniques

Duff, David G.; Baiker, Alfons; Gameson, I.; Edwards, Peter P.

doi:10.1021/la00033a011

Cited by 97 publications

(82 citation statements)

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“…1) The unconjugated colloids are not stable, they coalesce with time (Leunissen and van de Plas, 1993;Duff et al, 1993b). Therefore, they have to be coupled to ligands immediately after formation.…”

Section: Preparation Of Small Protein Colloidal Gold Labels the Formamentioning

confidence: 99%

Preparation, use, and enlargement of ultrasmall gold particles in immunoelectron microscopy

Baschong

Stierhof

1998

Microsc. Res. Tech.

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Section: Preparation Of Small Protein Colloidal Gold Labels the Formamentioning

confidence: 99%

Preparation, use, and enlargement of ultrasmall gold particles in immunoelectron microscopy

Baschong

Stierhof

1998

Microsc. Res. Tech.

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“…To prepare SiO 2 /Au nanoparticles, the suspension of SiO 2 particles modified with organosilane was agitated with colloid solution of Au nanoparticles with diameters 1 to 2 nm that were obtained by reducing with HAuCl 4 3H 2 O (in the concentration 2.510 -2 M) tetrakishydroxy-methyl-phosphonium chloride (1 % water solution) [13]. The following growth of Au nanoparticles with a set size and degree of filling the template surface was provided via reducing HAuCl 4 3H 2 O in water solution.…”

Section: The Methods For Synthesis Of Structuresmentioning

confidence: 99%

Efficient core-SiO2/shell-Au nanostructures for surface enhanced Raman scattering

Yukhymchuk¹

2014

Semicond. Phys. Quantum Electron. Optoelectron.

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Abstract. The efficient SERS (surface enhanced Raman scattering) substrates that are films of nanoparticles (NP) of the "core-shell" type, where the core of SiO 2 , and the shell of gold nanoparticles, were developed in this work. Application of scanning electron microscopy and optical absorption enabled to find correlation between surface morphology of nanostructures and position of the plasmon absorption band. It helped to adjust the latter to the wavelength of exciting laser radiation. It has been shown that the designed nanostructures are able to enhance electric field of an emitting dipole not only due to adjustment of the band frequency for plasmon absorption to the wavelength of exciting laser radiation but also due to contribution of the so-called "hot spots" to enhancement of electric field scattering. Analysis of characteristics inherent to SERS substrates with nanostructures of the soil core -Au shell type has shown that they enhance the Raman signal by 5 orders higher as compared with the substrates based on SiO 2 nanospheres not covered with gold nanoparticles.

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“…To prepare gold colloids of 1~3 nm, tetrakis(hydroxymethyl) phosphonium chloride (THPC)/NaOH reducing agents were mixed with 1.0 wt% aqueous tetrachlroloaurate(III) trihydrate. 19 At the alkaline condition, THPC is a powerfully reducing agent enough to reduce gold salts via the derivation of formaldehyde. An excess of 3-aminopropyltrimethoxysilane (APTMS) was then added to a double-doped magnetic silica solution, and APTMS-functionalized magnetic particles were subsequently added to the gold colloids for the deposition of gold seeds onto the surface of magnetic nanoparticles.…”

Section: Methodsmentioning

confidence: 99%

Fabrication of Double-Doped Magnetic Silica Nanospheres and Deposition of Thin Gold Layer

Park

Lee

Haam³

et al. 2009

Bulletin of the Korean Chemical Society

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Double-doped magnetic particles that incorporated magnetites into both the surface and inside the silica cores were fabricated via the sol-gel reaction of citrate-stabilized magnetites with silicon alkoxide. Double-doped magnetic particles were easily fabricated and exhibited an higher magnetism in comparison to the singledoped magnetic particles that were prepared by the erosion of surface-deposited magneties from double-doped magentic particles. Thin gold layer was formed over magnetic silica nanospheres via nanoseed-mediated growth of gold clusters. The plasmon-derived absorption bands of double-doped magnetic silica-gold nanoshells were more broadened and shifted down by ca. 20 nm as compared to those of single-doped magnetic silicagold nanoshells, which were attributed to not only the surface scattering of incident light due to relatively rough surafce morphology, but also heterogeneous permittivity of dielectric cores due to surface-deposited magnetites.

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A new hydrosol of gold clusters. 2. A comparison of some different measurement techniques

Cited by 97 publications

References 0 publications

Preparation, use, and enlargement of ultrasmall gold particles in immunoelectron microscopy

Preparation, use, and enlargement of ultrasmall gold particles in immunoelectron microscopy

Efficient core-SiO2/shell-Au nanostructures for surface enhanced Raman scattering

Fabrication of Double-Doped Magnetic Silica Nanospheres and Deposition of Thin Gold Layer

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