Mallik S., Chand Pal S., Acharyya S. et al. · ACS Applied Materials and Interfaces · 2023 · 30580-30590
Open a family to keep every result attached to its sample, method and conditions.
Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.
The 3000 rpm CPO-27-Ni/pentacene bilayer OFET detects DES vapour down to 10 ppm under room-temperature conditions.
Caveat: Authors infer capability below 10 ppm but did not experimentally measure below 10 ppm.
p007 / article p.30586 · Results and Discussion · Figure 6a,b · Linked to 5 structured results
The bilayer OFET is more sensitive to DES than to DPGME, nitrobenzene, or toluene at the same tested concentrations.
Caveat: Selectivity values for comparator gases are read visually from Figure 6d; LDA plot is qualitative without reported classification metrics.
p007 / article p.30586 · Results and Discussion · Figure 6d,e · Linked to 7 structured results
The bilayer OFET shows bias-stress transients and ambient ageing mobility loss, so device stability is usable but caveated for long-term deployment.
Caveat: SI text and Figure S6b appear inconsistent on the magnitude of 65-day mobility reduction; both were recorded with provenance.
SI p.S5-S6 · Bias stress stability; Long term stability · Figures S5-S6 · Linked to 4 structured results
DES desorption/recovery is slow at room temperature, likely because reversible physisorption is limited by insufficient desorption energy and some DES remains attached to Ni sites.
Caveat: Recovery-time numbers are not tabulated in the main text; detailed response is graphical.
p008 / article p.30587 · Results and Discussion · Figure 6c · Linked to 1 structured result
CPO-27-Ni provides open Ni2+ Lewis acidic sites and porous channels that can capture and interact with DES vapour.
Caveat: The specific DES-Ni binding depiction is schematic and partly supported by prior H2S/CPO-27-Ni literature cited by the authors.
p007 / article p.30586 · Results and Discussion · Figure 5f · Linked to 6 structured results
CPO-27-Ni powder retains its PXRD crystallinity after extended ambient exposure/use, supporting its use as a stable sensing-layer component.
Caveat: The SI reports qualitative retention from PXRD; no numeric crystallinity metric is provided.
SI p.S2-S3 · Powder x-ray diffraction pattern of CPO-27-Ni · Figure S2 · Linked to 4 structured results
CPO-27-Ni diffusion damages the pentacene thin-film phase while progressively increasing the bulk crystalline phase, interpreted as MOF-induced recrystallisation.
Caveat: Integrated peak area values are shown graphically but not tabulated in the main text.
p005 / article p.30584 · Results and Discussion · Figure 4c · Linked to 4 structured results
Spin-coated CPO-27-Ni crystallites diffuse into pentacene grain boundaries, creating a bilayer channel and roughening/non-stationary growth.
Caveat: Direct diffusion evidence is based mainly on AFM phase/morphology and growth-scaling interpretation, not a chemically resolved depth profile in the main text.
p004 / article p.30583 · Results and Discussion · Figure 2g; Figure 3 · Linked to 3 structured results
Among the bilayer OFET rpm series, the 3000 rpm CPO-27-Ni coating gives the highest carrier mobility and was selected for sensing experiments.
Caveat: Mobility values are figure-read estimates because numeric tabulated values are in missing SI/plots.
p006 / article p.30585 · Results and Discussion · Figure 5c · Linked to 4 structured results
Bilayer OFETs have lower drain current than pristine pentacene OFETs, attributed to Schottky barrier formation, polar traps, defects, and possible confinement effects.
Caveat: Drain-current numbers are visual estimates; mechanistic attribution is interpretive.
p006 / article p.30585 · Results and Discussion · Figure 5a,b · Linked to 4 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| CPO-27-Ni/pentacene bilayer OFET | Composite device stack: glass/Al/Al2O3/h-BTNC/pentacene/CPO-27-Ni/AuCPO-27-Ni Ni2+ open metal sites; Al gate; Au source/drain · CPO-27-Ni dhtp linker plus pentacene semiconductor | unknown · CompositeBottom-gate top-contact OFET in which CPO-27-Ni crystallites are spin-coated onto pentacene and diffuse into pentacene grain boundaries. | p006 / article p.30585 · Results and Discussion · Figure 5d,e |
| CPO-27-Ni / MOF-74(Ni)Browse family: Ni₂(DOBDC) / Ni–MOF-74 / CPO-27-Ni | [Ni2(dhtp)(H2O)2].8H2O; dhtp = dobdc = 2,5-dioxide-1,4-benzene dicarboxylateNi2+ metal sites; one-dimensional Ni-O chains after water removal · 2,5-dioxide-1,4-benzene dicarboxylate / 2,5-dihydroxyterephthalate (dhtp/dobdc) | 3D · PristineRhombohedral honeycomb-like CPO-27-Ni/MOF-74(Ni) with microporous 1D hexagonal channels; powder XRD peaks at 2theta 6.83 and 11.80 deg assigned to (110) and (300). | p002 / article p.30581 · Introduction · Figure 1 |
| Pentacene | C22H14 | unknown · Model Systemp-type organic semiconductor film with metastable thin-film phase (001') at 2theta 5.71 deg and stable bulk phase (001) at 2theta 6.15 deg. | p004 / article p.30583 · Results and Discussion · Figure 4 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| CPO-27-Ni/pentacene bilayer OFET, 2000 rpm MOF coatingresearch_0424__mat__cpo27_pentacene_bilayer_ofet | Thin Film · Target Sample · Composite | CPO-27-Ni dispersion spin-coated on pentacene at 2000 rpm and dried in a vacuum desiccator for 1 day.glass/Al/Al2O3/h-BTNC · 20 nm pentacene; MOF layer thickness not directly reported | p003 / article p.30582 · Results and Discussion · Figure 2b |
| CPO-27-Ni/pentacene bilayer OFET, 3000 rpm MOF coatingresearch_0424__mat__cpo27_pentacene_bilayer_ofet | Thin Film · Target Sample · Composite | CPO-27-Ni dispersion spin-coated on pentacene at 3000 rpm; selected for all sensing experiments due to highest carrier mobility.glass/Al/Al2O3/h-BTNC · 20 nm pentacene; MOF layer thickness not directly reported | p006 / article p.30585 · Results and Discussion · Figure 5c |
| CPO-27-Ni/pentacene bilayer OFET, 4000 rpm MOF coatingresearch_0424__mat__cpo27_pentacene_bilayer_ofet | Thin Film · Target Sample · Composite | CPO-27-Ni dispersion spin-coated on pentacene at 4000 rpm and dried in a vacuum desiccator for 1 day.glass/Al/Al2O3/h-BTNC · 20 nm pentacene; MOF layer thickness not directly reported | p003 / article p.30582 · Results and Discussion · Figure 2d |
| CPO-27-Ni/pentacene bilayer OFET, 5000 rpm MOF coatingresearch_0424__mat__cpo27_pentacene_bilayer_ofet | Thin Film · Target Sample · Composite | CPO-27-Ni dispersion spin-coated on pentacene at 5000 rpm and dried in a vacuum desiccator for 1 day.glass/Al/Al2O3/h-BTNC · 20 nm pentacene; MOF layer thickness not directly reported | p003 / article p.30582 · Results and Discussion · Figure 2e |
| activated CPO-27-Ni for N2 sorptionresearch_0424__mat__cpo_27_ni | Powder · Pristine Control · Pristine Framework | Guest solvents exchanged with dry methanol for 72 h, then removed by heating at 100 deg C for 20 h before N2 sorption. | p003 / article p.30582 · Results and Discussion · Figure 1e |
| CPO-27-Ni colloidal dispersion in DMF/ethanolresearch_0424__mat__cpo_27_ni | Unknown · Composite Component · Pristine Framework | CPO-27-Ni powder mixed with DMF/ethanol 1:1 and stirred overnight at room temperature. | p009 / article p.30588 · Experimental Section / Fabrication of OFET and Characterization |
| as-synthesised CPO-27-Ni powder/crystalsresearch_0424__mat__cpo_27_ni | Powder · Composite Component · Pristine Framework | Prepared in the authors' laboratory according to a cited literature procedure; SEM shows crystals ranging from micrometres to nanometres. | p003 / article p.30582 · Results and Discussion · Figure 1f |
| 20 nm pentacene filmresearch_0424__mat__pentacene | Thin Film · Pristine Control · Model | Deposited by organic molecular beam evaporation on h-BTNC at 80 deg C.Al/Al2O3/h-BTNC dielectric stack on glass · 20 (+/-5) nm | p003 / article p.30582 · Results and Discussion · Figure 2a |
| pristine pentacene-based OFETresearch_0424__mat__pentacene | Thin Film · Pristine Control · Model | BGTC OFET without MOF layer; Au source/drain contacts deposited by thermal evaporation.glass/Al/Al2O3/h-BTNC · 20 nm pentacene; 120 (+/-10) nm Al gate; 15 nm Al2O3; 30 um channel length | p006 / article p.30585 · Results and Discussion · Figure 5b |