• Graphene direct to substrate

  • Zero surface contamination

  • Uniform atom-thick graphene

  • Optically clear microscopically

  • Optimised FET channel design

Sense for your next project

Questions? Paragraf can provide the answers

What's included when I buy a GFET-PV01?

The GFET-PV01 is sold in quad packs containing four units. Each GFET-PV01 has a 60-pin edge connector designed to plug into a compatible socket (e.g. SAMTEC MEC6-130-02-L-D-RA1). The pin assignments are detailed in the GFET-PV01 datasheet that is available here. Paragraf offers a plug-in GFET (PiG) breakout board to purchase when you order GFETs – this can be added to your shopping cart when you review the cart.

What do I connect the GFET-PV01 to for data acquisition?

The device is compatible with readily available data acquisition systems, e.g. Tektronix Keithley DAQ units.

How do I store GFET-PV01s after receipt?

Open the box and check the contents against your order, keep the GFETs in the sealed ESD packaging until immediately prior to use. Store at room temperature.

Are there any special handling instructions?

The GFET-PV01 channels can be damaged by physical contact. Do not touch the centre of the GFET, inside the round epoxy encapsulation area. Hold the PCB by the sides or at the end opposite to the edge connector.

Does the GFET-PV01 need to be prepared in any way before use? 

Your specific application for the GFET will determine the procedures required to prepare it for evaluation. First, consider whether the intended measurements are with an aqueous sample. If they do use aqueous samples, then care should be taken to transition the graphene from the dry storage state to a hydrated state. It is recommended to equilibrate the device with a measurement solution for at least ten minutes to achieve the best working conditions for the FET.

What to do if my device does not perform as I expect?

First, ensure that the GFET-PV01 is correctly connected to your measurement equipment and confirm that the measured resistance across each dry FET channel is less than 3 kΩ. If you are using the GFET-PV01 connected through the PiG breakout board, please ensure all connections are secure and the GFET-PV01 is fully inserted into the connector. If after confirming all connections the resistance across each dry FET channel exceeds 3 kΩ, please contact help@paragraf.com.

If resistance values are meeting specifications but no gating is achieved, make sure any electrolyte liquid is covering the surface of the FET channel being tested. We recommend wherever possible to use Paragraf’s internal gate for troubleshooting.If you are using an external gate, make sure the electrode is fully immersed into the liquid. In both cases, confirm that the gate is connected to the equipment. If after all the checks, no reasonable transfer curves are achieved, please contact help@paragraf.com.

If gating is obtained, but the transfer curve characteristics do not match expectations, confirm that the device was equilibrated with the electrolyte solution for five to ten minutes prior to commencing measurement.

What to do if the packaging or product is damaged when received?

Please take an image of the packaging and the damage experienced and email us at help@paragraf.com. We will respond within two working days. If a replacement is arranged by return postage, this will include a returns envelope and we request that you return the damaged goods to us promptly, and we can improve our production and fulfilment process to avoid the same issue reoccurring in the future.

How should the product be disposed of at the end of use?

The packaging is produced with recycled materials and can be fully recycled following local guidelines.

The PCB and FET elements need to be disposed of via your local WEEE infrastructure, following decontamination with a suitable detergent or sterilisation product. If you don’t have access to WEEE goods recycling, contact help@paragraf.com and we will offer a solution.

Where do I go to find additional help and support?

Please contact help@paragraf.com.

If you don't see what you need, ask us...

Paragraf produces a range of Graphene Hall-Effect Sensors (GHS) and Graphene Field-Effect Transistors (GFET) for different customers, please contact us with your specific requirements