Nanopartz™ Gold Nanoparticles for in vitro Bright Field Imaging

 

Functionalized gold nanoparticle with Nanopartz™ covalently bonded polymer (top) and Nanopartz™ covalent MUTAB (bottom). Thickness of polymer is less than the size variablity of the gold nanoparticle.   Conjugations (Ordering Abbreviation) Amine TA Biotin TB Carboxyl TC Maleimide TMAL Methyl TM Neutravidin TN NHS TNHS Streptavidin TS MUTAB TMU Secondary antibodies

 

Composition

These in vitro gold nanoparticles for in vitro Bright field imaging come in numerous conjugations:

Available with the following active groups. Methyl acts as a free acid form to be used as a non-reactive negative control.

1. Amine
2. Biotin
3. Carboxyl
4. Methyl
5. Neutravidin
6. Streptavidin
7. Azide
8. MUTAB (a strongly positive non cytotoxic CTAB replacement)

Secondary Antibody Conjugates - polyclonal provide species-specific detection of the entire target IgG class (heavy and light chains, H+L). Reagents, labeling (PF/protein ratio and purificaiton methods are optimized to provide the highest possible binding function and overall fluorescence intensity. All conjugates are stable for 1 year at 4°C, providing consistent performance for the duration of use.

1. Goat Anti-Human IgG
2. Goat Anti-Mouse IgG
3. Goat Anti-Rabitt IgG
4. Goat Anti-Human IgA
5. Goat Anti-Human IgM
6. Protein A

Quantity

This product is available in 50 OD-mL and 250 OD-mL quantities, 2.5mg and 12.5mg gold, respectively. Volume is 1mL. Buffer is customer determined.

Delivery

All domestic shipments are sent Fed Ex Standard Overnight delivery, international Fed Ex Priority 2 day. No shipments on Fridays.

Shelf Life/Storage Temperature

This product is guaranteed for six months and should be stored at 4°C after opening. Care must be taken to only use sterile glassware when working with this product.

Sterilization/Endotoxin

Sterilization and Endoxtoin Free Options are available.

Certifications

This product is manufactured using our audited ISO 9000/2001 quality control system. Every order comes with a Certification of Analysis. We use NIST traceable:

UV-VIS (Agilent 8453) for extinction and concentration measurements

NIR (Cary 500) for NIR extinction and concentration measurements

DLS (Malvern Nano ZS) for zeta potential measurement

ICP-MS (Varian 820-MS) for gold mass measurements

TEM (Phillips CM-100 100KV) for sizing

These gold nanoparticles exhibit white light scattering in brightfield microscopy applications. These gold nanoparticles come with a wide variety of covalent conjugations, specifically suited for in-vitro applications. They are resistant to high salt concentrations, and a wide variety of pHs (4-9). The customer is given the opportunity to select from a variety of buffers, and may request custom conjugations to specific antibodies. Nanopartz possesses technologies that allow for the "site specific conjugation" to antibodies, thereby keeping the ligand active for further activity. Customer has a choice for radiation sterilization (no sodium azide is used) certification and endotoxin free products.

 

• Extremely stable. Shelf life is greater than six months.
• Covalent bonds.
• High anisotropy.
• Low cytotoxicity. Gold is FDA approved for rheumatoid arthritis.
• Excellent photostability
• Buffer Stability - stable from pH 4-9.
• Instrument capability - any brightfield microscope

 

 

"We were previously making our own gold nanoparticles using the commonly used technique of citrate reduction of Au(III). The colloids generated are broadly polydisperse, and we were concerned that our application of these particles in immuno-gold labeling of cells for optical coherence microscopy (OCM) would be utilizing only the large diameter tail of the distribution. We purchased the sampler package of NanoPartz gold spheres (30 nm, 50 nm, 70 nm, 90 nm) and examined each size carefully with dynamic light scattering, OCM, and spectrophotometry. Our measurements indicated diameters a couple nanometers larger than specifications (a result of measurements on the fully hydrated state?), and remarkable monodispersity - within specs. It is clear to us now that our early immuno-gold results were dominated by the largest diameter spheres of our early colloids. We are delighted by the NanoPartz monodisperse preparations and recommend them strongly!"

Dr. Richard C. Haskell 
Professor of Physics & Director of Physics Clinic 
Physics Department 
Harvey Mudd College

"The scientists at Nanopartz have developed a line of colloidal gold nanorods with extremely high monodispersity in size, shape, and mass. The surfactant layer is highly stable and readily displaced for biofunctionalization. In every test, in vitro and in vivo, these materials have exceeded our expectations."

Geoffrey A. von Maltzahn
NSF and Whitaker Graduate Fellow
Harvard-MIT Division of Health Sciences and Technology
Laboratory for Multiscale Regenerative Technologies