There are Langmuir-Blodgett systems for creating different films. Familiarize yourself with the systems and try to make the thinnest film from the powder on the subphase that is suitable for your CNTs. Lower the slide into the film, pre-pressed with barriers. Then pull the slide out of the thin layer. Your film should fit on the slide. If it does not fit, you need to lubricate the slide with some glue.
To create a thin CNT layer on glass slides using CNT powder, disperse CNTs in a solvent (e.g., ethanol, NMP) with a surfactant (e.g., SDS), then ultrasonicate for uniform dispersion. Use dip coating (immerse and withdraw slides at a controlled speed), spray coating (airbrush evenly), or spin coating (drop solution on a spinning slide) for deposition. Dry at 100–200°C and anneal at 200–400°C to enhance adhesion. For ultra-thin, uniform films, use the Langmuir-Blodgett method: spread CNTs on water, compress with barriers, and transfer onto slides by controlled dipping. Pre-coating slides with glue can improve adhesion.
Sir, when I commented, I did not notice your response to the question. As you said, scientific ethics encourage making different comments for the purpose of knowledge accumulation and general benefit while respecting the opinions of others at the same time. Nevertheless, I merely attempted to provide some brief details to answer the question, nothing more.
And even if we assume what you suggested, then I endorse what you said.