# NanoArc Chemistry Library

This directory contains chemistry and phase-change-material research for
NanoArc. It does not define approved ACE electrical behavior or establish a
production safety claim.

## Directory map

| Directory | Contents |
|---|---|
| `PCM_Cells/` | Test-cell design, qualification, and generated PDFs |
| `SAT/` | Sodium acetate trihydrate preparation and crystallization work |
| `Hydrogels/` | Alginate and agar electrolyte-carrier screening plans |
| `Specimens/` | Records for locally held or collected material specimens |
| `Proposals/` | Broader PCM, cartridge, and post-NanoArc research proposals |
| `SDS/` | Safety data sheets and supplier-documentation notes |
| `LAB_EQUIPMENT_INVENTORY.md` | Confirmed chemistry equipment, workspace disposition, and capability limits |
| `LAB_EQUIPMENT_UPGRADE_QUEUE.md` | Trigger-based purchases, acceptance tests, and shared-budget rules |
| `References/` | Papers and other technical references |
| `Images/` | Source-material photographs and experiment evidence |

## Current working sequence

1. Complete the mandatory fixed-probe, vessel-support, and water-only fixture
   rehearsal described in [`LAB_EQUIPMENT_UPGRADE_QUEUE.md`](LAB_EQUIPMENT_UPGRADE_QUEUE.md).
2. Perform the approved but exploratory, nonqualified `SAT/SAT-HM-001` process
   rehearsal.
3. Qualify documented SAT stock for formal work using
   [`SAT/SAT_STOCK_QUALIFICATION.md`](SAT/SAT_STOCK_QUALIFICATION.md). Household `SAT-HM-001` material is not
   formally qualified by that rehearsal.
4. Procure, build, and qualify the common 5 g test-cell family using
   [`PCM_Cells/NanoArc_PCM_Test_Cell_Qualification_Rev0.md`](PCM_Cells/NanoArc_PCM_Test_Cell_Qualification_Rev0.md).
5. Establish empty, water, pure-SAT, and manually seeded baselines.
6. Obtain Tristan's approval for the draft crystallization-route protocol, then
   execute its chemical-nucleator, retained-seed, and on-demand branches without
   combining mechanisms prematurely.
7. Feed reviewed, characterized results into cartridge development only after
   the preceding evidence is complete.

Planning is not execution: the PCM-cell protocol is approved but uncompleted,
the crystallization route remains a draft unless separately approved, and the
hydrogel carrier screen is an approved plan whose materials and fixtures are
not yet procured or tested.

The broader candidate backlog is maintained in
[`Proposals/Chemistry_Applications_Idea_Register.md`](Proposals/Chemistry_Applications_Idea_Register.md).

The approved benign carrier screen is maintained in
[`Hydrogels/NanoArc_Hydrogel_Electrolyte_Carrier_Screen_Rev0.md`](Hydrogels/NanoArc_Hydrogel_Electrolyte_Carrier_Screen_Rev0.md).
Its physical prerequisites are listed in
[`Hydrogels/HYDROGEL-CARRIER-001_PREREQUISITES.md`](Hydrogels/HYDROGEL-CARRIER-001_PREREQUISITES.md).

SAT stock intake and disposition are recorded in
[`SAT/SAT_STOCK_QUALIFICATION.md`](SAT/SAT_STOCK_QUALIFICATION.md); reference and SDS gaps are tracked in
[`References/REFERENCE_GAPS.md`](References/REFERENCE_GAPS.md) and [`SDS/SDS_GAPS.md`](SDS/SDS_GAPS.md).

## Configuration-management note

The Chemistry workspace was audited on 2026-08-15. No collision-suffixed copy
of this README or `Proposals/Chemistry_Applications_Idea_Register.md` exists
under the NanoArc workspace. The unsuffixed files are therefore the canonical
current files; no historical duplicate was removed.