Nanopartz™ Carbon Nanoparticles

Nanopartz™ now offers fluorescent carbon nanoparticlse (CNP) having sizes of 2-6 nm with quantum yields of about ~3%. These CNPs are nano-crystalline with predominantly graphitic structure and shows green, yellow, and red fluorescence under UV exposure. These CNP shows encouraging cell imaging application. They enter into cell without any further functionalization and fluorescence property of these particles can be used for fluorescence based cell imaging application.


Home » A- Unfunctionalized Nanoparticles » A51 Spherical Carbon Nanoparticles
Fluorescent Carbon Nanoparticles
Fluorescent Carbon Nanoparticles
Part #A51-(COLOR)-(WT)
Price: $240.00



Part # Color Approx. Diameter (nm) Excitation (MAX,nm) Emission (MAX,nm)







These carbon spherical gold nanoparticles are dry.

Custom Formulation

Diameters 2 to 6nm.  Other sizes are special order.  Please contact us.


This product is available in 1mg and larger. For orders larger than 10mg, or for orders amounting over 50mg per annum, please contact sales for quantity pricing.

Introductory Kits

For smaller evaluation volumes, two different kits are available, one with 25mL volume with a four bottle minimum and one with 1mL with an 8 bottle minimum.


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 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. For our dried particles, storage is room temperature with a shelf life of 1 year.


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



carbon nanoparticles

Fluorescent carbon nanoparticles (CNP) based labeling of Ehrlich ascites carcinoma cells (EAC) cells. Cells solution was mixed with CNP solution and incubated for 30 minutes. Washed cells were imaged under bright filed, UV and blue excitations. The bottom row images correspond to the control experiment where no CNP was used. Cells become bright blue-green under UV excitations and yellow under blue excitation, but they were colorless in the control sample. A light blue color of the control sample under UV excitation is due to well known auto-fluorescence of cell.



"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


Cellular uptake and toxicity of gold nanoparticles in prostate cancer cells: a comparative study of rods and spheres

A Malugin, H Ghandehari - Journal of Applied Toxicology, 2010 - Wiley Online Library
... Plain, PEGylated spherical and PEGylated rod GNPs were obtained from Nanopartz (Salt Lake ...
Determining the size and shape dependence of gold nanoparticle uptake into mammalian cells. ...
4. TEM images of PC-3 cells incubated with plain spherical gold nanoparticles 30 nm ...

Geometry and surface characteristics of gold nanoparticles influence their biodistribution and uptake by macrophages

MM Janát-Amsbury, A Ray, CM Peterson… - European Journal of …, 2011 - Elsevier
... PEGylated gold nanoparticles (spherical particles of 50 nm in diameter and rod-shaped particles
with reported dimensions of 10 × 45 nm) were purchased from Nanopartz, Inc. (Loveland, CO,
USA). Before used, gold nanoparticle samples were incubated with cell culture ...

Computationally guided photothermal tumor therapy using long-circulating gold nanorod antennas

G von MaltzahnJH Park, A Agrawal, NK Bandaru… - Cancer research, 2009 - AACR
... coated gold NRs with longitudinal plasmon resonance at 810 nm (Nanopartz, a division of ... To
understand the relationship between the nanoparticle distribution in tumors and the ... to that
observed previously for PEG-protected 10-nm diameter spherical gold nanoparticles ( 21). ...

SERS‐coded gold nanorods as a multifunctional platform for densely multiplexed near‐infrared imaging and photothermal heating

G von Maltzahn, A Centrone, JH Park… - Advanced …, 2009 - Wiley Online Library
... IV), and DTDC-655 (VII) to display a 10–103 fold higher signal than three molecules with visible
absorbance shown previously to exhibit efficient near-infrared SERS on spherical gold nanopar-
ticles (I, II ... CTAB-coated gold NRs were purchased from Nanopartz with a ...

A simple millifluidic benchtop reactor system for the high-throughput synthesis and functionalization of gold nanoparticles with different sizes and shapes

SE Lohse, JR Eller, ST Sivapalan, MR Plews… - ACS …, 2013 - ACS Publications
... from several retailers in concentrations of >30 ppm (Sigma-Aldrich, Nanopartz, Nanoseedz, etc.). ...
for AuNRs in 2005 (which uses sodium borohydride, rather than spherical AuNP seeds ... batch
syntheses, even though the reactor permits synthesis of gold nanoparticles at higher ...

Negatively Charged Gold Nanoparticles Inhibit Alzheimer's Amyloid‐β Fibrillization, Induce Fibril Dissociation, and Mitigate Neurotoxicity

YH Liao, YJ Chang, Y Yoshiike, YC ChangYR Chen - Small, 2012 - Wiley Online Library
... In this research, we have examined the effects of gold nanoparticles (AuNPs) on amyloids ... to inhibit
Aβ fibrillization and redirect Aβ forming fragmented fibrils and spherical oligomers. ... Bare,
amine-conjugated, and carboxyl-conjugated AuNPs were purchased from Nanopartz Inc. ...

NanoPen: dynamic, low-power, and light-actuated patterning of nanoparticles

A Jamshidi, SL NealeK YuPJ Pauzauskie… - Nano …, 2009 - ACS Publications
... Figure 1c shows NanoPen immobilization and patterning of 90 nm diameter spherical gold
nanoparticles (purchased from Nanopartz Inc.(37 ... The stage is then manually transported leaving
a trace of gold nanoparticles in the illuminated area on the OET surface. ...

Off-resonance plasmonic enhanced femtosecond laser optoporation and transfection of cancer cells

J Baumgart, L Humbert, É BoulaisR Lachaine… - Biomaterials, 2012 - Elsevier
... The cells were incubated during 3–6 h with the AuNP (8 μg/ml, diameter 100 nm, Nanopartz)
in the culture medium at 37 °C and 5 ... In summary, the use of off-resonance spherical gold
nanoparticles allows to reduce the energy absorption by the nanoparticle, inhibiting its ...

Mechanistic heteroaggregation of gold nanoparticles in a wide range of solution chemistry

ARMN AfroozIA KhanSM Hussain… - … science & technology, 2013 - ACS Publications
... that can determine aggregation behavior and enumerate aggregation mechanisms of gold
nanospheres (AuNSs ... stabilized AuNSs with 10 nm primary particle diameter were procured from
Nanopartz Inc ... Part a of Figure 1 shows spherical structures with angular features for some ...

Influence of transient environmental photothermal effects on optical scattering by gold nanoparticles

EY Lukianova-HlebDO Lapotko - Nano letters, 2009 - ACS Publications
... 10-A-100, Nanopartz, Salt Lake City, UT) and 250 nm (no. ... figure Figure 1. Experimental setup:
individual gold nanoparticles are coaxially illuminated by a pump laser pulse (532 nm), by a
continuous probe laser (633 nm), and also by a probe laser pulse (690 nm). ...