Pith Number

pith:62JZO6I2

pith:2026:62JZO6I2ATH7OKH2NJ3PUQ3YMH

not attested not anchored not stored refs pending

Defects, Corrugation and Temperature Govern Rarefied-Air Drag on Graphene Coatings

Antimo Marrazzo, Davide Bidoggia, Maria Peressi, Samuel Cajahuaringa

Coating alumina with graphene reduces the tangential momentum accommodation coefficient of nitrogen, lowering drag in rarefied air.

arxiv:2602.00285 v3 · 2026-01-30 · cond-mat.mtrl-sci · physics.chem-ph · physics.flu-dyn

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\usepackage{pith}
\pithnumber{62JZO6I2ATH7OKH2NJ3PUQ3YMH}

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

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The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

coating the α-Al2O3(0001) surface with graphene markedly reduces the tangential momentum accommodation coefficient (TMAC) of N2, shifting scattering toward more specular reflection and thereby lowering drag; the reduction strengthens up to 900 K. While structural defects can increase TMAC via defect-induced corrugation and local atomic and electronic rearrangements, graphene retains its performance at experimentally relevant defect densities.

C2weakest assumption

The molecular dynamics simulations provide an accurate representation of the real-world gas-surface momentum exchange for N2 on graphene-coated alumina, including the effects of temperature and defects.

C3one line summary

Graphene coating on alumina reduces TMAC of N2 in rarefied conditions, lowering drag, with the effect strengthening to 900 K and remaining robust to defects.

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-06-02T01:03:41.617381Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f69397791a04cff728fa6a76fa437861f4a419f754ba9750139a9250d0e7d09b

Aliases

arxiv: 2602.00285 · arxiv_version: 2602.00285v3 · doi: 10.48550/arxiv.2602.00285 · pith_short_12: 62JZO6I2ATH7 · pith_short_16: 62JZO6I2ATH7OKH2 · pith_short_8: 62JZO6I2

Agent API

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/62JZO6I2ATH7OKH2NJ3PUQ3YMH \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: f69397791a04cff728fa6a76fa437861f4a419f754ba9750139a9250d0e7d09b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a5883d97488dea8b6fbd82855cc8c0b43e12c967c40d4b15d6a0273c3b2aed0a",
    "cross_cats_sorted": [
      "physics.chem-ph",
      "physics.flu-dyn"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.mtrl-sci",
    "submitted_at": "2026-01-30T20:14:33Z",
    "title_canon_sha256": "662da5a8e89bc47f69ae9c23a54264e94712a89956c69788666e0c53bdc0d4cc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2602.00285",
    "kind": "arxiv",
    "version": 3
  }
}