Primary studyCore evidenceThin Film Device

Processable UiO-66 Metal-Organic Framework Fluid Gel and Electrical Conductivity of Its Nanofilm with Sub-100 nm Thickness

Somjit V., Thinsoongnoen P., Waiprasoet S. et al. · ACS Applied Materials and Interfaces · 2021 · 30844-30852

3materials
12samples
7synthesis routes
18measurements
57results
7claims 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: Medium

The fluid-gel/spin-coating approach is generalisable to other Zr-based MOFs, demonstrated first-hand for MOF-801 and MOF-808 films.

Caveat: The paper reports film morphology and GIXRD preservation for MOF-801/MOF-808, but no transport data for those films.

p005 / 30848 · Results and Discussion · Figure 4c,d; Figure S6 · Linked to 4 structured results

Application RelevanceSupport assessment: High

Sub-100 nm UiO-66 films provide larger interfacial charge-carrier diffusion coefficients and stable current under applied field, supporting electrocatalysis/electrochemical-storage relevance.

Caveat: The paper measures model CV/chronoamperometry behaviour rather than demonstrating a full electrocatalytic or storage device.

p006 / 30849 · Results and Discussion · Figure 5f; Figures S12-S14 · Linked to 5 structured results

Structure Property LinkSupport assessment: Medium

The UiO-66 topology and permanent porosity are preserved in the fluid gel, with additional mesoporosity and increased pore volume attributed to defect formation during downsizing.

Caveat: Defect-site attribution is based on GIXRD features and porosity trends, not a full defect quantification.

p004 / 30847 · Results and Discussion · Figure S3 · Linked to 5 structured results

Synthesis MechanismSupport assessment: High

Rapid high-concentration solvothermal synthesis plus ultrasonication downsizes UiO-66 to approximately 10 nm particles and produces a free-flowing fluid gel suitable for spin coating.

Caveat: Mechanistic statement is authors' interpretation based on morphology/rheology rather than direct time-resolved growth evidence.

p003 / 30846 · Results and Discussion · Figures 1-3 · Linked to 4 structured results

Synthesis MechanismSupport assessment: High

UiO-66 fluid gel enables water-based spin coating of smooth films with controllable 40-150 nm thickness by changing suspension concentration and spin speed.

p004 / 30847 · Results and Discussion · Figure 4; Figure S4 · Linked to 4 structured results

Transport MechanismSupport assessment: Medium

Lower conductivity in films thicker than 100 nm is hypothesised to arise from greater roughness causing carrier scattering and lower defect concentration reducing carrier density.

Caveat: The paper explicitly frames this as a hypothesis; direct carrier-density or defect-concentration quantification is not reported.

p005 / 30848 · Results and Discussion · Figure S10; Figure S11 · Linked to 4 structured results

Transport MechanismSupport assessment: High

Sub-100 nm pristine UiO-66 nanofilms show markedly higher electrical conductivity and lower activation energy than thicker films/bulk powder.

Caveat: Authors state that more investigations are needed to elucidate the origin of electrical conductivity in ultrathin UiO-66 films.

p005 / 30848 · Results and Discussion · Figure 5; Tables S1-S2 · Linked to 7 structured results

Material identities

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

MaterialCompositionStructure contextSource
MOF-801Zr-fumarate MOFZr-based clusters · fumarate / fumaric acid-derived linker3D · PristineZr-based MOF with topology different from UiO-66; fluid-gel structure preserved by GIXRD.p005 / 30848 · Results and Discussion · Figure 4c; Figure S6
MOF-808Zr-BTC MOFZr-based clusters · 1,3,5-benzenetricarboxylate / trimesate3D · PristineZr-based MOF with topology different from UiO-66; fluid-gel structure preserved by GIXRD.p005 / 30848 · Results and Discussion · Figure 4d; Figure S6
UiO-66[Zr6O4(OH)4(1,4-benzenedicarboxylate)6]Zr6 oxo-hydroxo clusters / Zr nodes · 1,4-benzenedicarboxylate / terephthalate (BDC)3D · PristineUiO-66 topology retained in fluid gel and films by GIXRD; (111) peak around 7.4 degrees with d-spacing 11.5-12.0 A.p003 / 30846 · Results and Discussion

Sample register

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

Show 12 sample records
SampleForm and roleProcessing and geometrySource
MOF-801 fluid gelresearch_0736__mat__mat_mof801Unknown · Target Sample · Pristine FrameworkPrepared using the UiO-66 fluid-gel procedure with fumaric acid replacing terephthalic acid.p002 / 30845 · Synthesis of UiO-66 Fluid Gel · Figure S6a
MOF-801 thin filmresearch_0736__mat__mat_mof801Thin Film · Target Sample · Pristine FrameworkSpin-coated from MOF-801 fluid gel using the UiO-66 thin-film method/optimal parameters.cleaned glass substratep005 / 30848 · Results and Discussion · Figure 4c
MOF-808 fluid gelresearch_0736__mat__mat_mof808Unknown · Target Sample · Pristine FrameworkPrepared using the UiO-66 fluid-gel procedure with trimesic acid replacing terephthalic acid.p002 / 30845 · Synthesis of UiO-66 Fluid Gel · Figure S6b
MOF-808 thin filmresearch_0736__mat__mat_mof808Thin Film · Target Sample · Pristine FrameworkSpin-coated from MOF-808 fluid gel using the UiO-66 thin-film method/optimal parameters.cleaned glass substratep005 / 30848 · Results and Discussion · Figure 4d
Al/UiO-66/Al thin-film devicesresearch_0736__mat__mat_uio66Electrode · Target Sample · Pristine FrameworkDevice fabricated in N2 glovebox by thermal evaporation of Al, spin-casting UiO-66 fluid gel, annealing, and top Al evaporation.cleaned glass substrate with 40 nm Al anode and 40 nm Al cathode · UiO-66 layer 40-150 nm; Al electrodes 40 nm each; device area 0.04 cm2p002 / 30845 · Fabrication of UiO-66 Thin-Film Device for Electrical Measurement · Figure 5a,b
150 nm UiO-66 nanofilmresearch_0736__mat__mat_uio66Thin Film · Target Sample · Pristine FrameworkSpin-coated fluid-gel nanofilm used as thicker-film comparison for Arrhenius, diffusion coefficient, chronoamperometry, AFM roughness, and conductivity.cleaned glass substrate; Al/MOF/Al device for solid-state transport; glass substrate in KCl electrolyte for CV · 150 nmp005-p006 / 30848-30849 · Results and Discussion · Figure 5; Figures S10-S13; Table S1
60 nm UiO-66 nanofilmresearch_0736__mat__mat_uio66Thin Film · Target Sample · Pristine FrameworkSpin-coated fluid-gel nanofilm used for Arrhenius, diffusion coefficient, chronoamperometry, and stability measurements.cleaned glass substrate; Al/MOF/Al device for solid-state transport; glass substrate in KCl electrolyte for CV · 60 nmp005-p006 / 30848-30849 · Results and Discussion · Figure 5; Figures S12-S14
80 nm UiO-66 nanofilmresearch_0736__mat__mat_uio66Thin Film · Target Sample · Pristine FrameworkSpin-coated fluid-gel nanofilm used for conductivity and AFM roughness comparison.cleaned glass substrate · 80 nmp005 / 30848 · Results and Discussion · Figure S10; Table S1
UiO-66 nanofilm thickness seriesresearch_0736__mat__mat_uio66Thin Film · Target Sample · Pristine FrameworkSpin-coated from UiO-66 fluid gel dispersed in DI water, then annealed at 100 C on a hot plate for 10 min and in vacuum oven at 100 C for 20 h.cleaned glass substrates · 40, 60, 80, 120, and 150 nm; overall controllable range 40-150 nmp004-p005 / 30847-30848 · Experimental Section; Results and Discussion · Figures 4 and 5; Figures S4-S5
UiO-66 fluid gelresearch_0736__mat__mat_uio66Unknown · Target Sample · Pristine FrameworkFree-flowing UiO-66 gel dispersed in DI water for spin coating; kept in ethanol at room temperature for further use.p002-p003 / 30845-30846 · Experimental Section; Results and Discussion · Figures 2c,d; Figure 3
UiO-66 nonflowing gelresearch_0736__mat__mat_uio66Unknown · Pristine Control · Pristine FrameworkDense UiO-66 nanoparticle gel prepared following literature and compared with the fluid gel for spin-coating processability.p003 / 30846 · Results and Discussion · Figure 2b; Figure S2
conventional UiO-66 microcrystalline powderresearch_0736__mat__mat_uio66Powder · Pristine Control · Pristine FrameworkConventional microcrystalline UiO-66 powder used as morphological, water-adsorption, porosity, and conductivity comparison.p003 / 30846 · Results and Discussion · Figure 2a; Figure S1; Table S3