Gold Nanoparticles
Our Gold Nanoparticle Products
We offer a range of different formats of gold nanoparticle products, which include the following:
Gold Nanospheres in Solution
Gold nanospheres in water, with particle size ranging from 5-100 nm and with a wide variety of nanosphere surfaces.
Gold Nanorods
Gold nanorods in the form of surface plasmon resonant (SPR) rod-shaped nanoparticles are available with narrow size distributions and uniform shape. These gold nanorods have absorption peaks that are tunable throughout the visible and short wave near infrared (SWNIR) with peak resonances from 660-980 nm. Our products are purified to remove ammonium surfactants and replaced with citrate to produce a stable, easily displaceable surface chemistry suitable for functionalization with a wide range of molecules.
Gold Nanoshells
Gold nanoshells consist of a silica core surrounded by a gold shell, with the plasmon resonance tunable across the visible and infrared region by adjusting the core size to shell thickness ratio. We have products with varying functionality available.
Silica Shelled Gold Nanoparticles
Silica shelled gold nanoparticles that offer a versatile conjugation surface that are available in a wide range of solvents which can be concentrated up to very high concentrations.
Custom Gold Nanoparticles
Looking for something else not listed above? We offer custom synthesis capabilities for custom gold nanoparticles of differing sizes, shapes, surfaces and concentrations.
Gold Nanoparticle Applications
Gold nanoparticles are one of the most commonly utilized nanomaterials due to their stability and optical properties. They are often used in the following industrial applications:
Diagnostics
Gold nanoparticles are readily conjugated to antibodies and other proteins due to the affinity of sulfhydryl (-SH) groups for the gold surface, and gold-biomolecule conjugates have been widely incorporated into diagnostic applications, where their bright red color is used in home and point-of-care tests such as lateral flow assays.
Biomedical
Gold nanomaterials can be conjugated to biomolecules to deliver targeted therapeutics and can be used for photothermal cancer therapy, where their tunable optical properties cause them to convert laser light into heat and selectively kill cancerous cells.
Plasmonics
Gold nanoparticles have unique optical properties because they support surface plasmons. At specific wavelengths of light the surface plasmons are driven into resonance and strongly absorb or scatter incident light. This effect is so strong that it allows for individual nanoparticles as small as 30 nm in diameter to be imaged using a conventional dark field microscope.
This strong coupling of metal nanostructures with light is the basis for the new field of plasmonics. Applications of plasmonic gold nanoparticles include biomedical labels, sensors, and detectors. The gold plasmon resonance is also the basis for enhanced spectroscopy techniques such as Surface Enhanced Raman Spectroscopy (SERS) and Surface Enhanced Fluorescence Spectroscopy (SEF) which can be used to detect analytes with ultrahigh sensitivity.
Why Purchase From Fortis Life Sciences?
We stand behind everything we make 100%. If for any reason you are dissatisfied with the material you’ve received, we will do everything in our power to make it right.
Each batch of gold nanoparticles is extensively characterized using techniques including transmission electron microscopy (TEM), dynamic light scattering (DLS), zeta potential, and UV-Visible spectroscopy. In addition to ensuring that every batch of nanoparticles meets our stringent quality control requirements, customers are provided with batch-specific specification sheets containing representative TEM images, sizing data, hydrodynamic diameter measurements, zeta potential analysis, UV-Visible spectrum, and solution pH.
Surface chemistry and suspension buffer details are provided for each material, and no proprietary coatings or mystery chemicals are used. Gold nanoparticle products are available with a range of capping agents including citrate, tannic acid, polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), silica, and amine-terminated silica.
Due to their small size, low mass, and extremely high surface area:volume ratios, once nanoparticles bind together it is often impossible to separate them. Consequently, most dried gold nanopowders that are resuspended consist of clusters of 100's of individual nanoparticles. For many plasmonics and biomedical applications, this agglomeration significantly degrades performance. At Fortis Life Sciences we have developed custom processing techniques that allow us to concentrate and purify nanoparticles without inducing agglomeration. The particles can be transferred into a variety of different solvents to enable their integration into a wide variety of systems. In addition, we have developed a surface stabilization technique that allows us to produce dried gold nanoparticles that can be redispersed into individual, monodisperse nanoparticles.
Our nanoparticle chemists will address your technical questions and help you select the optimal nanomaterial for your application.
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