Electrical Transport — Dimensionality Modulates Electrical Conductivity in Compositionally Constant One-, Two-, and Three-Dimensional Frameworks

3 measurement groups · 13 results

Reported values remain attached to the sample, method, conditions, extraction quality and source location that produced them.

Two-probe electrical conductivity during air oxidation

Electrical conductivity

As-synthesised Ni-3D rods worked up under N2 · Powder

Anaerobic Ni-3D measured before and after air exposure/oxidation to Ni-3D-ox.

Temperature: 296
Atmosphere: anaerobic then air exposure
Geometry: two-probe conductivity
Context: Ni-3D to Ni-3D-ox oxidation sequence
Measurement source: main p.8, article p.5590 · Electrical Conductivity

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni-3D after 12 h air exposure conductivity	6.7 x 10^-7 S cm-1 after 12 h	6.7e-7 S/cm	—	Text Exact Reported	main p.8, article p.5590 · Electrical Conductivity
Anaerobic Ni-3D two-probe conductivity	6.2 x 10^-9 S cm-1	6.2e-9 S/cm	—	Text Exact Reported	main p.8, article p.5590 · Electrical Conductivity
Ni-3D-ox maximum conductivityMarked as a best value within this paper	2.9 x 10^-5 S cm-1	0.000029 S/cm	—	Text Exact Reported	main p.8, article p.5590 · Electrical Conductivity

Room-temperature four-probe conductivity on pressed pellets

Electrical conductivity

Ni-1D rods/bricks · Powder

Pressed pellets measured at 296 K in ambient atmosphere; four parallel copper-wire contacts and gold-plated tungsten probes; at least three pellets from four separate batches averaged.

Temperature: 296
Atmosphere: ambient; dark probe-station chamber
Geometry: 4-probe pressed-pellet cuboid, current outer probes and voltage inner probes
Context: pristine Ni-1D and Ni-2D pellets; HCl-treated Ni-1D comparison
Measurement source: SI pp.6-7 · Room temperature electrical conductivity measurements · Figures S40-S44

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
4 M HCl-treated Ni-1D conductivityMarked as a best value within this paper	0.267 S/cm	0.267 S/cm	—	Caption Exact Reported	SI p.56 · Figure S41 · Figure S41
Ni-1D average room-temperature four-probe conductivity	(0.16 +/- 0.02) S cm-1	0.16 S/cm	+/- 0.02	Text Exact Reported	main p.8, article p.5590 · Electrical Conductivity
Ni-1D best room-temperature four-probe conductivityMarked as a best value within this paper	0.19 S cm-1	0.19 S/cm	—	Text Rounded Reported	main p.8, article p.5590 · Electrical Conductivity · Figures 8a and S40
Ni-2D average room-temperature four-probe conductivity	(0.054 +/- 0.009) S cm-1	0.054 S/cm	+/- 0.009	Text Exact Reported	main p.8, article p.5590 · Electrical Conductivity
Ni-2D best room-temperature four-probe conductivityMarked as a best value within this paper	0.067 S cm-1	0.067 S/cm	—	Text Rounded Reported	main p.8, article p.5590 · Electrical Conductivity · Figures 8a and S42
Ni-2D device 1 conductivity after transformation for 96 days	0.188 S cm-1 after 96 days	0.188 S/cm	—	Caption Exact Reported	SI p.57 · Figure S42 · Figure S42

Variable-temperature four-contact conductivity; Arrhenius and Mott VRH fits

Electrical conductivity

Ni-1D rods/bricks · Powder

PPMS DynaCool, Electrical Transport Option, 15 or 100 K to 350 or 400 K; heating/cooling cycles; Ni-2D cooling sequence first to prevent transformation.

Temperature: 15-400
Geometry: 4-contact probe cell
Context: Ni-1D, Ni-2D and Ni-3D-ox
Measurement source: SI p.7 · Variable temperature electrical conductivity data · Figures 8b, S46-S51

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni-1D activation energy above about 285 K	43.9 meV at T > about 285 K	0.0439 eV	—	Text Exact Reported	main p.8, article p.5590 · Electrical Conductivity · Figure 8c
Ni-1D activation energy below about 260 K	19.3 meV at T < about 260 K	0.0193 eV	—	Text Exact Reported	main p.8, article p.5590 · Electrical Conductivity · Figure 8c
Ni-2D activation energy	78.0 meV in the temperature range 100-300 K	0.078 eV	—	Text Exact Reported	main p.8, article p.5590 · Electrical Conductivity · Figure 8b
Ni-3D-ox variable-range hopping transport dimensionality	3D Mott VRH, d = 3	—	—	Text Exact Reported	main p.8, article p.5590 · Electrical Conductivity · Figure 8b inset, Figure S50