If you have any questions, please contact us(858) 368-9065 Or Send An Email support@grolltex.com

Monolayer graphene on 4-inch (100mm) diameter Si/SiO2 wafer


Product Metrics

Monolayer Graphene

  • Transparency: >97%
  • Graphene Coverage: 100% with sporadic adlayers (see optical image above)
  • FET mobility: >2700 cm2/(V∙s)
  • Sheet resistance*: 430 ± 50 Ω/sq
  • Grain size: >80 μm
  • Raman D/G ratio*: Indistinguishable to 0.03


  • Our 4-inch Si/SiO2 wafers are sourced from a reliable, quality-assured supplier.
  • Type/Doping: P/B
  • Resistivity: ≤ 0.005 Ω-cm
  • Metal Impurities: 1.00e10 – 5.00e10 (at/cm)
  • Wafer thickness: 500 ± 25 μm
  • Oxide thickness: 285 nm
  • Orientation: <1-0-0>
  • Growth Method: CZ
  • Polish: Single Side

Do you need assistance with Raman measurements on your custom/modified graphene sample? We can help! Please inquire at support@Grolltex.com or call (858) 368-9065 for details.

*The indicated product metrics are generic to our process. Each graphene unit sold is accompanied by a specification sheet unique to the S/N and contains batch-specific metrics. This eliminates guesswork and ensures that you only get the best, well-characterized, and QA-passed graphene.

Data files for mobility and Raman measurements are available upon request. Please send an email including your name, institution, and product serial number to support@Grolltex.com and indicate which file(s) you would like.

Tips Safety Data Sheet

  • To ensure the maximum shelf life of your graphene sample, it is best stored under vacuum or in inert atmosphere (Argon or Nitrogen) conditions once the vacuum-sealed package has been opened.
  • Please keep the product serial number you receive with your sample, as it will assist us if you have inquiries about the product. The serial number (S/N) is located on the clear plastic container the graphene arrives in, the external silver bag, and your packing list.

  • We have taken the guesswork out of your project by analyzing every piece of graphene that leaves the door. Take advantage of the data files available for your graphene batch. Contact us if you require additional characterization of your graphene.
  • If you are planning to perform any patterning or post-processing on your wafer, it is recommended that you perform a wafer conditioning step no more than 12 hours prior to post-processing. Please contact us for recommendations that suit your substrate material


Do you have more specific questions about our products? Do you have inquiries about custom or bulk orders? Do you need help with Raman measurements of graphene? Please feel free to send us an email at support@Grolltex.com, or call us at (858) 368-9065.