Primary studyCore evidenceTransport Physics

Wet-Adhesive On-Skin Sensors Based on Metal–Organic Frameworks for Wireless Monitoring of Metabolites in Sweat

Yang X., Yi J., Wang T. et al. · Advanced Materials · 2022 · 2201768

5materials
11samples
7synthesis routes
15measurements
43results
5claims and caveats

Evidence map

Open a family to keep every result attached to its sample, method and conditions.

Author interpretations and caveats

Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.

Application RelevanceSupport assessment: High

The wireless Ni3HHTP2-based sweat sensor produced vitamin C measurements comparable to HPLC and tracked sweat vitamin C dynamics after oral intake.

Caveat: On-body study involved five healthy male subjects aged 20-30; raw data are not supplied.

7 · Results and Discussions · Figure 4d-f · Linked to 3 structured results

Application RelevanceSupport assessment: Medium

The Ni3HHTP2-based sensor is reported as reusable, operationally stable, structurally stable in aqueous/sensing conditions, and biocompatible for wearable use.

Caveat: The stability evidence is mostly application-specific and short-term; long-term storage or repeated human-use ageing data are not reported.

4-5 · Results and Discussions · Figures 2d-i; S15-S16 · Linked to 4 structured results

Composite RoleSupport assessment: High

The BNC substrate supplies hydrophilicity, breathability, and wet adhesion that make the Ni3HHTP2 electrode wearable without external fixturing on sweaty skin.

Caveat: These are substrate/device properties rather than intrinsic cMOF transport properties.

5-6 · Results and Discussions · Figure 3 · Linked to 5 structured results

Structure Property LinkSupport assessment: High

Ni3HHTP2 provides intrinsic electrical conductivity, high surface area, and metal catalytic sites that enable efficient and selective AA/UA electrocatalytic oxidation.

Caveat: Application metrics are from composite Au/BNC electrodes, not free-standing pristine MOF films.

3 · Results and Discussions · Figure 1f-g · Linked to 5 structured results

Structure Property LinkSupport assessment: High

Ni3HHTP2 was selected over Cu3HHTP2 and Ni3HITP2 because Cu3HHTP2 had no AA response and Ni3HHTP2 showed a stronger AA signal and lower calculated RDS free energy than Ni3HITP2.

Caveat: Conductivity alone is not the selection criterion; Cu3HHTP2 has higher pellet conductivity but poor AA electrocatalytic response under the tested conditions.

3-4 · Results and Discussions · Figure S9; Figure 1h · Linked to 5 structured results

Material identities

Names and aliases are kept exactly within the paper’s own identity model.

MaterialCompositionStructure contextSource
Cu3HHTP2 conductive MOFBrowse family: Cu₃(HHTP)₂ / Cu–HHTPCu3HHTP2Copper nodes in a HHTP-based conductive MOF. · HHTP = 2,3,6,7,10,11-hexahydroxytriphenylene.2D · PristineStructurally analogous Cu-cMOF comparator; PXRD compared with the Ni cMOFs.3 · Results and Discussions · Figure S9
Ni3HHTP2 conductive MOFBrowse family: Ni₃(HHTP)₂ / Ni–HHTPNi3HHTP2Nickel nodes / Ni sites in a triphenylene-based conductive MOF. · HHTP = 2,3,6,7,10,11-hexahydroxytriphenylene.2D · PristineLayered conductive MOF; PXRD peaks at 2theta = 4.7, 9.6, and 12.6 deg indexed to (100), (200), and (210), respectively; randomly oriented nanorods observed on the working electrode.2-3 · Results and Discussions · Figure 1; Figure S8
Ni3HHTP2/Au/BNC wearable layered electrode sensorBrowse family: Ni₃(HHTP)₂ / Ni–HHTPNi3HHTP2 film on Cr/Au patterned bacterial nanocellulose with Ag/AgCl reference and Ecoflex insulationNi nodes in Ni3HHTP2; Au current collector; Ag/AgCl pseudo-reference electrode. · HHTP linker in Ni3HHTP2; bacterial nanocellulose substrate and Nafion binder.2D · CompositeComposite layered device with two Ni3HHTP2-modified working electrodes on a 15 um BNC substrate; Cr/Au electrode layer and Ecoflex insulation.2 · Results and Discussions · Figure 1a-b
Ni3HITP2 conductive MOFBrowse family: Ni₃(HITP)₂ / Ni–HITPNi3HITP2Nickel nodes / Ni sites in a HITP-based conductive MOF. · HITP = 2,3,6,7,10,11-hexaiminotriphenylene or hexaiminotriphenylenesemiquinonate as written in SI.2D · PristineStructurally analogous Ni-cMOF comparator; PXRD compared with Cu3HHTP2 and Ni3HHTP2.3 · Results and Discussions · Figure S8
Ni3HHTP2 and Ni3HITP2 periodic slab modelsNi3HHTP2 and Ni3HITP2 two-layer slab surfacesNi sites in periodic slab models. · HHTP and HITP linkers in periodic slab models.2D · Model SystemPeriodic two-layer slabs used for DFT modelling of AA oxidation intermediates.S8 · Density functional theory calculations · Figure S10

Sample register

Sample form, processing state and composition status define the context for measurements.

Show 11 sample records
SampleForm and roleProcessing and geometrySource
Cu3HHTP2-modified electrochemical sensor electroderesearch_0069__mat__mat_cu3hhtp2Electrode · Pristine Control · CompositeMOF-modified sensor electrode used for AA CV comparison.Au/cellulose electrode inferred from common sensor fabrication3 · Results and Discussions · Figure S9
Cu3HHTP2 pressed pelletresearch_0069__mat__mat_cu3hhtp2Pellet · Pristine Control · Pristine FrameworkPressed pellet with two parallel Au wire contacts for two-probe I-V measurement.2.5 mm diameter pellet; thickness measured by micrometer but not reportedS4 · Conductivity of the MOFs · Figure S7
Activated Cu3HHTP2 powderresearch_0069__mat__mat_cu3hhtp2Powder · Pristine Control · Pristine FrameworkMethanolic sealed-bottle synthesis followed by washing, acetone exchange, and heating at 80 C.S3 · Synthesis of cMOFs
Ni3HHTP2 film working electrode on Au/BNCresearch_0069__mat__mat_ni3hhtp2_au_bnc_sensorElectrode · Composite Sample · CompositeNi3HHTP2 aqueous dispersion with 10% Nafion drop-cast onto Au/cellulose electrode and dried overnight.15 um bacterial nanocellulose membrane with Cr (5 nm)/Au (75 nm) patterned electrode · BNC 15 um; Cr 5 nm; Au 75 nm; MOF film thickness not reported2 · Results and Discussions · Figure 1c-e; Figure S5
Ni3HHTP2 periodic two-layer slab modelresearch_0069__mat__mat_ni_cmoF_dft_modelsModel · Model System · ModelTop layer and intermediates relaxed; other layers fixed.Periodic DFT vacuum slab · 21.4 x 37.1 A surface; two-layer slab; 30 A vacuumS8 · DFT calculations · Figure S10
Ni3HHTP2 pressed pelletresearch_0069__mat__mat_ni3hhtp2Pellet · Pristine Control · Pristine FrameworkMOF powder pressed into a rounded pellet with two parallel Au wire contacts attached by elargol.2.5 mm diameter pellet; thickness measured by micrometer but not reportedS4 · Conductivity of the MOFs
Activated Ni3HHTP2 powderresearch_0069__mat__mat_ni3hhtp2Powder · Pristine Control · Pristine FrameworkPowder obtained by aqueous synthesis, washing, acetone solvent exchange, and vacuum heating.S3 · Synthesis of cMOFs
Ni3HITP2 periodic two-layer slab modelresearch_0069__mat__mat_ni_cmoF_dft_modelsModel · Model System · ModelTop layer and intermediates relaxed; other layers fixed.Periodic DFT vacuum slab · 21.9 x 21.9 A surface; two-layer slab; 30 A vacuumS8 · DFT calculations · Figure S10
Ni3HITP2-modified electrochemical sensor electroderesearch_0069__mat__mat_ni3hitp2Electrode · Pristine Control · CompositeMOF-modified sensor electrode used for AA CV comparison.Au/cellulose electrode inferred from common sensor fabrication3 · Results and Discussions · Figure S9
Ni3HITP2 pressed pelletresearch_0069__mat__mat_ni3hitp2Pellet · Pristine Control · Pristine FrameworkPressed pellet with two parallel Au wire contacts for two-probe I-V measurement.2.5 mm diameter pellet; thickness measured by micrometer but not reportedS4 · Conductivity of the MOFs · Figure S7
Ni3HITP2 powderresearch_0069__mat__mat_ni3hitp2Powder · Pristine Control · Pristine FrameworkAqueous ammonium hydroxide/Ni acetate/HITP synthesis followed by washing with DI water and acetone.S3 · Synthesis of cMOFs