Nanopartz Gold Nanowires

 

CTAB

Hexadecyltrimethylammonium bromide (CTAB) (C16H33)N(CH3)3Br, cetyltrimethylammonium bromide. As any surfactant, it forms micelles in aqueous solutions. At 303 K (30 °C) it forms micelles with aggregation number 75-120 (depending on method of determination, usually average ~95) and degree of ionization α (fractional charge) 0.2–0.1 (from low to high concentration). The standard constant of Br- counterion binding to the micelle at 303 K (30 °C) is K° ≈ 400.

 

Composition

These Gold Nanowires are shipped in  DI water with excess CTAB capping agent to reduce knotting.

Custom Formulation

Sizes 500nm through 40 microns. Other sizes are special order.  Please contact us.

Quantity

This product is sold in volumes from 5mL and 2000mL, 0.05mg/mL.

Delivery

Standard sizes are in stock. Special order sizes are shipped in two weeks or less. All domestic shipments are sent Fed Ex Standard Overnight delivery, international Fed Ex Priority 2 day. No shipments on Fridays except for dried particles. Saturday shipping available for extra charge.

Shelf Life/Storage Temperature

This product is guaranteed for one year and should be stored at room temperature. Care must be taken to only use sterile glassware when working with this product.

Toxicity

This product is known to be cytotoxic. This product has been sterilized and is biological free.

Certifications

This product is manufactured using our audited ISO 9000 quality control system. Every order comes with a Certificate 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

The manufacturing method for these microparticles are based on our proprietary methods. This invention allows for the manufacturing of highly monodisperse gold microparticles.Gold Nanowires are highly advantageous in nanoelectronics, transparent electrodes, and as nanosensors.

All of these "bare" particles are capped with ligands that are easily replaced with thiol and charge chemistries.

 

• Highly stable, minimal to no aggregation
• Available in aspect ratios up to 100
• Long shelf life times
• High conductivity, readily transparent
• Easily conjugated
• High corrosion resistance

• Long wire lengths for nanoelectronics, nanoantennas
• Applications in tribological additives
• Light conduction for digital computers
• Thermally conductive
• Electronically conductive
• Photonically conductive

I want to use these nanowires in my sensor application - how do I go about doing that?

You are going to want to conjugate this nanowires to a ligand. We highly recommend our conjugating services for this.

What is the SPR for this product?

There is no Surface Plasmon Resonance for this particle as the diameter and length are too large, so these are not recommended for dark field microscopy. However, they are large enough to reflect light and are very advantageous for bright field microscopy.

I want to use this product in polymers for transparent electrodes. Can I use them as is?

Yes. We highly recommend purchasing them without CTAB, rather with citrate or another ligand as the CTAB can interfere with optical and sensor applications.

"We explored several nanoparticle manufacturers because we were unable to reproduce literature results for our application.  One manufacturer recommended Nanopartz because of our desire for a narrow distribution of particle sizes.  Nanopartz technical support helped us work through our application problems and suggested custom polymers that readily worked where others had failed.  This really impressed us.  They always provide quick delivery and helpful advice.  We would highly recommend Nanopartz."                                                                                  

Tony Mega, Revalesio Corporation