GRAPHENE SALES

PURCHASE GRAPHENE INK

Gratomic graphenes are derived from Gratomic graphite. Graphene enabled GRATINK and pastes are a collaborative development product formulated in tandem with Perpetuus Carbon Technology Wales UK and Gratomic Inc.

The inks and pastes (to the best of the company’s knowledge) are the most conductive carbon inks and pastes currently available within the global market place.

The GRATINK product range is available for purchase to meet customer printing preference specifications for R&D purposes. Minimum orders are available in one-kilo packages.

Following satisfactory customer preproduction qualification the products can then be varied so they are suitable for printing and coating in bulk quantities formulated to specification. GRATINK is then obtainable to meet the customer’s needs in 10’s to 100’s of kilos or tonnes.

Please note – Inks and pastes are prepared for all currently available methods of printing and coating with the exception of ink jet printing.

Gratink Purchasing Protocols

Due to the unique specifications required for different applications and printing methods customer specific information is required before we are able to process first sample sales.

Step 1: Complete and submit the sample Purchase Request Form as follows

Step 2: If necessary GRATINK experts will contact you by email or telephone to clarify your application and printing method

Step 3: A quote will be emailed to you from Gratomic Inc., which will include your graphene ink and shipping quote with an online credit card payment link.

Step 4: Once payment is received your GRATINK sample will be shipped

GRATINK request form

GRATOMIC COMMERCIALISATION EXAMPLE SURFACE MODIFIED GRAPHENE INK PROCESSING

High Conductivity Carbon Ink

Typical commercially available carbon inks have a resistivity of ≥30ohms/sq.

GRPCT 002 (<10Ω)

Properties

  • Excellent adhesion to a plularity of substrates
  • Cures from 90°C-130°C (circa 5-15 minutes)
  • Capable of printing 125µm lines

Markets for Gratomic graphenes powred  inks include:

  • Printed batteries
  • Bio sensors
  • Capacitors
  • Printed, flexible resistors

LTR4905 on untreated PET

GRATOMIC MODIFIED GRAPHENE INKS AND COATINGS VISCOSITY STABILITY

Monitoring of viscosity shows the ink has little change over 10 months

10-12 Pa s at 230-1

Batch to batch viscosity remains consistent between a series of samples

10-14 Pa s at 230-1

GRATOMIC MODIFIED GRAPHENE INKS AND COATINGS VISCOSITY STABILITY

1000 hour aging test observed for both quality datum inks

60°C Thermal Aging

60°C/90%RH Humidity Aging

Resistivity values drop initially after 100 hours then remain constant throughout remainder of testing

ADHESION AT ADVANCED AGINg

GRATINK 002 (10Ω) both sustain 5B adhesion throughout testing at both aging conditions

Gratomic  Commercialisation

Example Comparison of a Carbon Biosensor (Developed in Conjunction with Perpetuus Carbon Technologies).

Ink and Graphene as a biosensor for Glucose Calibration

 Control Carbon Biosensor Ink

  • Although we are utilising the Glucose model for calibration and comparison purposes, The sensor if loaded with the appropriate enzyme will be good for other bio sensing options
  • Results

(see below for Graphene ink plot)

Both graphs show a glucose calibration carried out at 4 points (plus a blank) on each of the printed inks. These are both the control graphs for the as printed ink The equation shown on the graph is y=mx+c whereby m is the gradient of the graph and C is the intercept. The gradient on both graphs are almost identical.
The intercept C should be lower than around 1.5 ideally of which both are well below.

R2 represents the linearity of the slope and should be as close to 1 as possible – again both are very close to the desired value and the results for the Graphene ink match that of  one of the current best available biosensor inks employed in the field.