Pith Number

pith:K4ZPO7T4

pith:2026:K4ZPO7T4K3KCOX6AI5S3UIOYXB

not attested not anchored not stored refs pending

Ion Concentration and Voltage Imaging with Fluorescent Nanodiamonds

Anita Quigley, Hiroshi Abe, Nikolai Dontschuk, Patrick Voorhoeve, Philipp Reineck, Qiang Sun, Rob Kapsa, Takeshi Ohshima

Fluorescent nanodiamonds enable optical imaging of voltage and ion concentrations via NV charge-state switching.

arxiv:2602.13975 v3 · 2026-02-15 · cond-mat.mes-hall

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\usepackage{pith}
\pithnumber{K4ZPO7T4K3KCOX6AI5S3UIOYXB}

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4 Citations open

5 Replications open

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Claims

C1strongest claim

In aqueous electrochemical cells, we demonstrate voltage and ion concentration imaging based on the NV charge state in self-assembled FND layers on transparent substrates. Applied voltages reliably modulate the FND PL with a sensitivity of up to 16 mV Hz^{-1/2}. FND PL is also modulated by local changes in salt concentration with a sensitivity of up to 1.8% per millimolar NaCl.

C2weakest assumption

The observed photoluminescence modulation is caused by controlled switching between NV^0 and NV^+ charge states rather than other surface or environmental effects such as pH drift or temperature changes in the aqueous cell.

C3one line summary

Fluorescent nanodiamonds enable all-optical imaging of voltage (up to 16 mV Hz^{-1/2}) and ion concentration (1.8% per mM NaCl) via reversible NV charge state switching in aqueous cells.

Receipt and verification

First computed	2026-06-19T16:12:18.665301Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5732f77e7c56d4275fc04765ba21d8b86cc37eaad00c561bc86902f14b3a1f4b

Aliases

arxiv: 2602.13975 · arxiv_version: 2602.13975v3 · doi: 10.48550/arxiv.2602.13975 · pith_short_12: K4ZPO7T4K3KC · pith_short_16: K4ZPO7T4K3KCOX6A · pith_short_8: K4ZPO7T4

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/K4ZPO7T4K3KCOX6AI5S3UIOYXB \
  | 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: 5732f77e7c56d4275fc04765ba21d8b86cc37eaad00c561bc86902f14b3a1f4b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e435c4ad6fa893b7dc3904951ad5cca1fa941d48d9603fead46c42cf8c543f4b",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "cond-mat.mes-hall",
    "submitted_at": "2026-02-15T03:26:06Z",
    "title_canon_sha256": "5a6bf8673594438548c9ee69892f63f4182defcf58ad9a6acf088ade82611e9c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2602.13975",
    "kind": "arxiv",
    "version": 3
  }
}