Spectroscopy — High-performance field-effect transistor glucose biosensors based on bimetallic Ni/Cu metal-organic frameworks

4 measurement groups · 17 results

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

FTIR

Infrared spectroscopy

Ni/Cu-MOFs (7:1)-FET · Electrode

FTIR spectra of Ni-MOFs powders, Cu-MOFs powders and Ni/Cu-MOFs (7:1) powders.

Geometry: powder spectra for framework analogues
Context: pristine framework comparison
Measurement source: 3 · 3.1 · Fig. 2b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
FTIR framework peaks	2916, 2848, 1399, 1630 and around 1109 cm^-1	—	—	Text Rounded Reported	3 · 3.1 · Fig. 2b
FTIR amino-group peak	3433 cm^-1	—	—	Text Rounded Reported	3 · 3.1 · Fig. 2b

ICP-MS

Bulk elemental and compositional analysis

Ni/Cu-MOFs (7:1)-FET · Electrode

ICP-MS determined final Ni/Cu molar ratios for feed ratios 1:7, 1:1, 7:1, 20:1 and 30:1.

Geometry: Ni/Cu-MOFs with different feeding molar ratios
Context: pristine mixed-metal variants
Measurement source: 5 · 3.1 · Table S2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ICP-MS final Ni/Cu ratio for Ni/Cu-MOFs (1:1)	feeding Ni:Cu 1:1; final product Ni:Cu 0.83:1	—	—	SI Table Exact Reported	S7-S8 · Supporting Information · Table S2
ICP-MS final Ni/Cu ratio for Ni/Cu-MOFs (1:7)	feeding Ni:Cu 1:7; final product Ni:Cu 1:8.31	—	—	SI Table Exact Reported	S7-S8 · Supporting Information · Table S2
ICP-MS final Ni/Cu ratio for Ni/Cu-MOFs (20:1)	feeding Ni:Cu 20:1; final product Ni:Cu 17.53:1	—	—	SI Table Exact Reported	S7-S8 · Supporting Information · Table S2
ICP-MS final Ni/Cu ratio for Ni/Cu-MOFs (30:1)	feeding Ni:Cu 30:1; final product Ni:Cu 26.56:1	—	—	SI Table Exact Reported	S7-S8 · Supporting Information · Table S2
ICP-MS final Ni/Cu ratio for Ni/Cu-MOFs (7:1)Marked as a best value within this paper	feeding Ni:Cu 7:1; final product Ni:Cu 5.48:1	—	—	SI Table Exact Reported	S7-S8 · Supporting Information · Table S2
final Ni/Cu molar ratios by ICP-MS	Feed Ni:Cu 1:7, 1:1, 7:1, 20:1 and 30:1 gave final Ni/Cu ratios 1:8.31, 0.83:1, 5.48:1, 17.53:1 and 26.56:1, respectively	—	—	SI Table Exact Reported	S7-S8 · Supporting Information · Table S2
Cu 2p absence in Ni-rich variants	Cu 2p peaks did not appear in XPS of Ni/Cu-MOFs (20:1) and Ni/Cu-MOFs (30:1)	—	—	Text Qualitative	5 · 3.1 · Fig. S6a

XPS

X-ray photoelectron spectroscopy

Ni/Cu-MOFs (7:1)-FET · Electrode

Survey and high-resolution XPS used to compare Ni/Cu-MOFs (7:1), Ni-MOFs and Cu-MOFs.

Geometry: MOF film/powder surface analysis
Context: pristine mixed-metal framework and monometallic controls
Measurement source: 3-4 · 3.1 · Fig. 2c,d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Cu 2p binding-energy shift	-1.37 eV for Ni/Cu-MOFs (7:1) relative to Cu-MOFs	—	—	Text Exact Reported	4 · 3.1 · Fig. 2d
Ni 2p binding-energy shift	+0.35 eV for Ni/Cu-MOFs (7:1) relative to Ni-MOFs	—	—	Text Exact Reported	4 · 3.1 · Fig. 2d
XPS survey binding energies	O 1s 532.43 eV; N 1s 399.00 eV; C 1s 284.94 eV; Ni 2p 855.51 and 871.98 eV; Cu 2p 934.53 eV	—	—	Text Exact Reported	3 · 3.1 · Fig. 2c

XPS elemental quantification

X-ray photoelectron spectroscopy

Ni/Cu-MOFs (7:1)-FET · Electrode

Table S1 reports C 1s, N 1s, O 1s, Ni 2p and Cu 2p atomic/weight percentages for Ni/Cu-MOFs feeding ratios 1:7, 1:1, 7:1, 20:1 and 30:1.

Geometry: Ni/Cu-MOF films with varied feeding molar ratios
Context: pristine mixed-metal variants
Measurement source: S7 · Supporting Information · Table S1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
XPS elemental composition and Ni/Cu ratio for Ni/Cu-MOFs (1:1)	C 1s 73.05 At%, 64.77 Wt%; N 1s 11.58 At%, 11.98 Wt%; O 1s 13.85 At%, 16.37 Wt%; Ni 2p 0.70 At%, 3.03 Wt%; Cu 2p 0.82 At%, 3.85 Wt%; Ni/Cu molar ratio 0.85	—	—	SI Table Exact Reported	S7 · Supporting Information · Table S1
XPS elemental composition and Ni/Cu ratio for Ni/Cu-MOFs (1:7)	C 1s 71.84 At%, 63.30 Wt%; N 1s 10.59 At%, 10.89 Wt%; O 1s 16.03 At%, 18.83 Wt%; Ni 2p 0.57 At%, 2.46 Wt%; Cu 2p 0.97 At%, 4.52 Wt%; Ni/Cu molar ratio 0.59	—	—	SI Table Exact Reported	S7 · Supporting Information · Table S1
XPS elemental composition and Ni/Cu ratio for Ni/Cu-MOFs (20:1)	C 1s 67.70 At%, 54.69 Wt%; N 1s 12.46 At%, 11.73 Wt%; O 1s 15.47 At%, 16.64 Wt%; Ni 2p 4.12 At%, 16.26 Wt%; Cu 2p 0.15 At%, 0.68 Wt%; Ni/Cu molar ratio 25.75	—	—	SI Table Exact Reported	S7 · Supporting Information · Table S1
XPS elemental composition and Ni/Cu ratio for Ni/Cu-MOFs (30:1)	C 1s 66.96 At%, 52.54 Wt%; N 1s 13.69 At%, 12.53 Wt%; O 1s 14.11 At%, 14.76 Wt%; Ni 2p 5.06 At%, 19.42 Wt%; Cu 2p 0.18 At%, 0.74 Wt%; Ni/Cu molar ratio 28.11	—	—	SI Table Exact Reported	S7 · Supporting Information · Table S1
XPS elemental composition and Ni/Cu ratio for Ni/Cu-MOFs (7:1)Marked as a best value within this paper	C 1s 67.15 At%, 53.41 Wt%; N 1s 14.07 At%, 13.06 Wt%; O 1s 14.06 At%, 14.91 Wt%; Ni 2p 3.93 At%, 15.29 Wt%; Cu 2p 0.79 At%, 3.32 Wt%; Ni/Cu molar ratio 4.97	—	—	SI Table Exact Reported	S7 · Supporting Information · Table S1