Electrical Transport — The Growth Mechanism of a Conductive MOF Thin Film in Spray-based Layer-by-layer Liquid Phase Epitaxy

3 measurement groups · 11 results

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

AC complex impedance spectroscopy / EIS Nyquist analysis

Impedance spectroscopy

Cu3(HHTP)2-xC spray LBL-LPE thin-film growth-cycle series, x = 1-60 · Thin Film

Cu3(HHTP)2-xC films x = 5, 10, 15, 20, 30, 40, 50 and 60; Solartron SI 1260 impedance/gain phase analyser; gold wire 50 um; quasi-quad probe at room temperature; 300 mV AC amplitude; 10^-1 to 10^6 Hz; ZView2 equivalent-circuit fitting.

Temperature: room temperature
Atmosphere: not specified
Geometry: device dimension as in Figure 2d, Cr/Au electrodes with 10 um channel width
Context: pristine Cu3(HHTP)2-xC thin-film series
Measurement source: p004-p005 · 1.5 Evaluation of AC complex impedance spectra · Figure 3a-b; Figure S8

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
early-cycle bulk resistance dominance	at first 5 cycles, Rb is approximately 10 times higher than Rgb and Rc	—	approximately	Text Approximate	p004 · Results and Discussion · Figure 3b
AC impedance frequency range	10^-1 to 10^6 Hz	—	—	Text Range	p003 · Results and Discussion · Figure 3a
Nyquist semicircle and resistance trend with growth cycle	semicircle diameter decreases with growth cycle; Rb and Rgb decrease with a power-function model rather than a linear model	—	—	Text Qualitative	p003 · Results and Discussion · Figure 3a-b; Figure S8
resistance-change saturation cycle	decrease of Rb, Rgb and Rc slows and approaches saturation after the 10th growth cycle	—	after the 10th growth cycle	Text Rounded Reported	p004 · Results and Discussion · Figure 3b inset

two-contact probe conductivity

Electrical conductivity

HHTP powder pellet · Pellet

HHTP powder pellet measured by the same Keithley 4200 two-contact probe method at room temperature.

Temperature: room temperature
Atmosphere: ambient/not specified
Geometry: powder pellet; exact dimensions not reported
Context: non-MOF ligand control
Measurement source: p004 · 1.4 Evaluation of Electronic Conductivity · Figure S3

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HHTP pellet conductivity	3.4 x 10^-9 S cm^-1	3.4e-7 S m^-1	error bar shown, numeric uncertainty not labelled	Figure Axis Approximate	p007 · 2. Figures · Figure S3

two-contact probe DC I-V conductivity

Electrical conductivity

Cu3(HHTP)2-xC spray LBL-LPE thin-film growth-cycle series, x = 1-60 · Thin Film

Keithley 4200 semiconductor analysis system at room temperature; applied voltage -5 to 5 V with 0.1 V scan step; conductivity calculated as sigma = thickness/(A.R).

Temperature: room temperature
Atmosphere: ambient/not specified
Geometry: Cr/Au electrodes on sapphire; Figure 2d shows 1000 um electrode length and 10 um channel width / MOF film gap
Context: pristine Cu3(HHTP)2-xC thin-film series; HHTP pellet control also measured
Measurement source: p004 · 1.4 Evaluation of Electronic Conductivity · Figure 2d-f; Figure S6

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Cu3(HHTP)2-20C conductivity from SI comparisonMarked as a best value within this paper	1.4 x 10^-2 S cm^-1	1.4 S m^-1	error bar shown, numeric uncertainty not labelled	Figure Axis Approximate	p007 · 2. Figures · Figure S3
10-cycle conductivity after rapid rise	2.1 x 10^-3 S cm^-1	0.21 S m^-1	—	Text Rounded Reported	p003 · Results and Discussion · Figure 2f
conductivity increase over first 10 growth cycles	from 3.8 x 10^-7 to 2.1 x 10^-3 S cm^-1, about 5500 times	—	approximately 5500 times	Text Rounded Reported	p003 · Results and Discussion · Figure 2f
low-cycle conductivity start point	3.8 x 10^-7 S cm^-1	0.000038 S m^-1	—	Text Rounded Reported	p003 · Results and Discussion · Figure 2f
Cu3(HHTP)2-1C I-V behaviour	nonlinear I-V curve and very low current	—	—	Text Qualitative	p003 · Results and Discussion · Figure S6b
Cu3(HHTP)2-3C I-V behaviour	good linearity of I-V curve; uniform and continuous thin film	—	—	Text Qualitative	p003 · Results and Discussion · Figure S6d