Nanopartz Gold Nanowires
Nanopartz Gold Nanowires are nanowire shaped gold nanoparticles manufactured using proprietary methods that result in highly monodisperse lengths, long shelf lives, along with significantly improved reactivity. Nanopartz Gold Nanowires come in diameters from 75nm to100nm and lengths from 1000nm to 20000nm. They exhibit one SPR in the 510 to 520nm region attributed to the diameter. The SPR attributed to the length would be in the mid-IR. Every batch is completely characterized including size, monodispersity, aggregation, residual chemicals, and concentration. A Certificate of Analysis (COA) is provided for every order exhibiting TEM and UV-VIS images and data, as well as DLS data. Every product is in stock (99%) and is shipped same day. This product comes in two concentrations, regular OD=0.05 (0.05mg/mL), and highly concentrated OD=5 (5mg/mL) in DI water, purified of residual reactants to <0.1%. These particles are are available non-covalently capped with our own proprietary carboxylic acid, citrate, and many other adsorbed polymers. These capping agents are readily replaced with covalent and charge chemistries.
Product Image Left to Right, A14-1000 to A14-20000
| Part # | Diameter (nm) | Length (nm) | Aspect Ratio | Peak SPR Wave (nm) | NWs /mL | Wt. conc (mg/ml) | SPR Molar Ext. (M-1cm-1) |
| A14-1K | 75 | 1000 | 13 | 510 | 6.02E+08 | 0.05 | 4.98E+07 |
| A14-2K | 75 | 2000 | 27 | 510 | 2.97E+08 | 0.05 | 1.01E+08 |
| A14-3K | 75 | 3000 | 40 | 510 | 1.97E+08 | 0.05 | 1.52E+08 |
| A14-4K | 75 | 4000 | 53 | 510 | 1.48E+08 | 0.05 | 2.03E+08 |
| A14-6K | 75 | 6000 | 80 | 510 | 9.83E+07 | 0.05 | 3.05E+08 |
| A14-7.5K | 75 | 7500 | 100 | 510 | 7.86E+07 | 0.05 | 3.82E+08 |
| A14-10K | 75 | 10000 | 133 | 510 | 5.89E+07 | 0.05 | 5.10E+08 |
| A14-20K | 100 | 20000 | 200 | 520 | 1.65E+07 | 0.05 | 1.81E+09 |
| MW | MW (g/mole) | Zeta Charge (mV) | Salt Resistant? | Concentration Sensitive? | Easy to adsorb Proteins? | Easy to Thiolate? | Shelf life at 4C |
| Citrate | 192 | -35 | 1.5mM | Yes | Yes | Yes | 6 months |
| Nanopartz Carboxylic Acid | 212 | -30 | 15mM | Less than Citrate | Better than Citrate | Better than Citrate | years |
| PEI | 100K | 30 | 150mM | No | Yes | Yes | 6 months |
| PAA | 10K | -30 | 150mM | No | Yes | Yes | 6 months |
| PAH | 10K | 20 | 150mM | No | Yes | Yes | 6 months |
| PAA | 40K | -10 | 0.5M | No | Yes | Yes | 6 months |
| CTAB | 364 | 35 | 0.5M | Yes | Yes | No | 6 months |
| BSA | 66K | -15 | 0.5M | No | No | No | 6 months |
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
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
Controllable Growth of Gold Nanowires for Photonics Applications
or more. Commercially available chemically grown NWs from Nanopartz have ARs from 150
to 200. ... Controllable Growth of Gold Nanowires for Photonics Applications Ganta et al. ...
Damping of the acoustic vibrations of a suspended gold nanowire in air and water environments
(Nanopartz). ... to the PMMA layer, and the silicon detached from the gold nanowires/PMMA film
by ... The gold nanowire/PMMA film was then transferred to a glass coverslip containing ...
Spatially localized enhancement of evanescent coupling to whispering-gallery modes at 1550 nm due to surface plasmon resonances of Au nanowires
(a) Simple schematic of the setup in which diode-laser light is evanes- cently coupled from a
tapered fiber to the WGMs of a microsphere on which Au nanowires have been ...
Differential interference contrast microscopy imaging of micrometer-long plasmonicnanowires
a fundamental understanding of the optical response of Au nanowires for future ... polarization- and
wavelength- sensitive DIC images and intensities of 2 μm-long gold nano- wires. ...
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.
| Nanopartz™ Gold Nanowires | Other Technologies | |
| Monodispersity | High (<10%) | n/a |
| Size Accuracy | High | n/a |
| Linewidths | Narrow | n/a |
| Storage lifetime | Years | n/a |
| Ability to ligand exchange | Easy | n/a |
- 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
Example part number is A14-10K-CTAB-DIH-1-5-CS-EP where:
A14 - Product family number for Gold Nanowires
10000 - Length in nanometers. Other choices are 1000-20000
CTAB - Capping ligand, in this case CTAB. Other choices are NPC, CIT, PAA, PVP, PEI, PAH, PSS, BSA
DIH - Buffer, in this case 18MEG DI water. Other choices are PBS, MES, Sodium Borate, TRIS
1 - 0.05mg/mL concentration, other choice is 100 which is 5mg/mL
5 - Volume (mL). Other choices are 25mL.
CS - Certified Sterilized - Though the product come sterilized, this option includes testing and certification.
EP - Endotoxin Purified - The product is endotoxin purified and certified.