No chemical additives.
Purely physical.
Physical process · No chemical additives · No metals
GranovaQ® GQD is made entirely by a physical process, with no chemical additives. This avoids the chemical residues of the Hummers (oxidation) method and produces a metal-free material with an intact crystal structure.
01 / Four steps
Four steps to a quantum dot.
Step · Graphite, selected
01
Raw material selection
We select natural graphite with a well-ordered crystal structure using a patented process. This is the starting point of a purely physical method with no chemical additives, and it directly affects how precisely particle size can be controlled later.
Step · Physical exfoliation
02
Physical exfoliation
Graphene sheets are separated using physical energy only — no strong acids, oxidizers or organic solvents. This avoids the chemical residues that come with the Hummers (oxidation) method.
Step · Nano-cutting
03
Particle-size control into quantum dots
Our patented particle-size control produces three grades — 10, 20 and 50 nm — consistently at scale. The quantum size effect changes with particle size, so each grade can be designed for its application.
Step · Quality check
04
Quality check and dispersion
Particle size and quality are checked, and the dispersion is stabilized for the customer's formulation before shipping.
02 / Comparison
How our process differs from other methods.
| Method | Chemicals used | Residues | Crystal structure | Suitability |
|---|---|---|---|---|
| Hummers method (oxidation) | Strong acids (H₂SO₄, HNO₃) + oxidizer (KMnO₄) | Sulfate ions, manganese | Oxidation defects in the crystal structure | Chemical residues limit where it can be used |
| Chemical reduction | Reducing agents such as hydrazine | Hydrazine (a toxic substance) | Partially reduced, incomplete structure | Not suitable for cosmetics or food-contact uses |
| GranovaQ physical process | None | None (no chemical additives) | Intact crystal structure | Can be used in cosmetics, fibers and bedding |
03 / Three advantages
What a physical process makes possible.
Advantage · 01
One-tenth the cost
Production costs are one-tenth those of conventional graphene mass production. We supply more than 30 textile companies in China at volume, which gives us a competitive cost base.
Advantage · 02
No metals
The material contains no metals, so there is no leaching risk of the kind associated with silver- or copper-based additives. It can be used in cosmetics, fibers, bedding and other products that touch the skin.
Advantage · 03
Intact crystal structure
There are none of the crystal defects caused by oxidation or reduction, so graphene's own electronic properties — electron mobility and the quantum size effect — are preserved. This is what makes the material perform well.
04 / Production network
Seven sites, built for volume.
Alongside our R&D and manufacturing site in China, six partner factories handle mass production, each specialized by application: fibers, nonwovens and cosmetic formulation.
Our own site
China
R&D and core manufacturing
Production partner
Anhui
Fiber mass production
Production partner
Changzhou
Fiber spinning and blending
Production partner
Huai'an
Fiber finishing
Production partner
Guangzhou
Cosmetic formulation
Production partner
Chongqing
Fiber mass production
Production partner
Jiangxi
Nonwoven processing
— Next
Each size,its own properties.
After the process, the finished material: uses and functions for each of the three grades, 10, 20 and 50 nm.