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the cassettes WELFA-C
based on functionalized nanodiamonds

WELFA (WAINVAM-E Lateral Flow Assay) is a new generation of rapid and ultra-sensitive diagnostic test, which combines the principle of Lateral Flow Immuno Assay (LFIA) with the unique optical properties of NV center nanodiamonds.

The WELFA system consists of cassettes WELFA-C containing strips impregnated with functionalized nanodiamonds, specific to the targets of interest, and a reader, the WELFA-R.

Discover the WELFA-R, the cassettes reader Download the WELFA brochure Download the WELFA Biomedical brochure

Strips of functionalized nanodiamonds:

At WAINVAM, we functionalize NV nanodiamonds with antibodies to use them as probes or fluorescent markers. When irradiated by a green laser, they emit red fluorescence and can then recognize molecules of interest in a targeted and selective manner.

The functionalizations available in our EVADIA-NDF range, can be integrated into the strips, for cassette creations on request.

Within the framework of various collaborations, as well as to reach our long-term objective the early detection of cancers, we are working on other functionalizations.

To customize your strips,
we will determine together your needs:

  • Analytes to be detected and their quantification
  • Matrices to be analysed (blood, urine, saliva, environments …)
  • Expected measurements and performances

The stages of

The applications of


Feel free to contact us;  we will study with you the functionalization of nanodiamonds that will best meet your specific detection and measurement needs.

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Quantum properties of NV diamonds

Chapters available Optical properties of NV centre Optical detection of the magnetic resonance Longitudinal relaxation time T1 Coherent control of the spin state: Rabi oscillations Transverse coherence time T2* Dynamic decoupling: coherence time T2echo Optical properties of the NV centre The first observations of NV

Quantum sensors

A quantum sensor is a measuring instrument that exploits the laws of quantum mechanics and provides the measurement of physical quantities directly from values of fundamental constants of quantum physics. Such a sensor is therefore inherently accurate and stable, both being essential properties for many

Oxidative stress

Oxidative stress is involved in many phenomena ranging from a simple burn to serious diseases such as cancer, infectious diseases or neurodegenerative diseases. It is promoted by internal mechanisms such as infections or deficiencies, as well as by external factors such as smoking, sun exposure

The operation of a NV magnetometer

Magnetometry refers to the general principle of measuring the magnetic field of a system in order to study or characterise certain properties. The sensor with which magnetometry measurements are made is called a magnetometer. At WAINVAM-E we develop magnetometers using the optical and quantum properties