Jiang S., Mo X., Zhao X. et al. · Analysis and Sensing · 2024 · e202400024
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.
Lu-HHTP acts as a chemiresistive humidity sensor over 33-95% RH at room temperature, reaching response 19 at 95% RH with 36 s response and 25 s recovery.
Caveat: Application data are from a MEMS-coated device; device-to-device statistics are not reported in the extracted text.
4 · Conclusions · Figure 3; Table S2 · Linked to 4 structured results
Lu-HHTP is assigned as a highly crystalline 2D layered conductive lanthanide organic framework with hexagonal channels and ordered AA-type stacking.
Caveat: The refined structure is described as average/disordered with two sets of disordered structures.
2 · Results and Discussion - Synthesis and Characterization · Figure 1; Table S1 · Linked to 5 structured results
The layered Lu-HHTP framework remains structurally robust after water soaking and during prolonged humidity sensing.
Caveat: Long-term stability response values are read approximately from Figure 3D; PXRD water soaking is qualitative.
4 · Humidity Sensing Measurements of Lu-HHTP · Figures 3D and S6 · Linked to 3 structured results
The proposed humidity-sensing mechanism is that water adsorbs at oxygen-containing groups, promotes electron transfer, and at higher RH forms more hydrogen bonds that reduce interlayer distance and enhance out-of-plane transport.
Caveat: The reduction in interlayer distance under humidity is proposed mechanistically; the extracted paper does not report an in situ interlayer-spacing measurement under RH.
4 · Results and Discussion - humidity sensing mechanisms · Figure S8 · Linked to 3 structured results
The authors attribute charge transfer in Lu-HHTP to redox-active HHTP units plus interlayer pi-pi stacking.
Caveat: Mechanistic link is interpretive and based on spectroscopy plus conductivity rather than direct transport anisotropy measurements.
3 · Results and Discussion - Synthesis and Characterization · Figure 2 · Linked to 4 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Lu-HHTP | Lu-HHTP; exact empirical formula not reportedlutetium ions, seven-coordinate Lu centres · 2,3,6,7,10,11-hexahydroxytriphenylene (HHTP) | 2D · PristineTwo-dimensional layered conductive lanthanide organic framework with 1D hexagonal channels, slightly misaligned AA stacking and interlayer pi-pi interactions. | 2 · Results and Discussion - Synthesis and Characterization · Figure 1 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| Lu-HHTP coated MEMS humidity sensorresearch_0099__mat__lu_hhtp | Electrode · Target Sample · Pristine Framework | 5 mg Lu-HHTP dispersed in ethanol by ultrasonication; 20 ul applied to MEMS electrode and dried/heated at 60 deg C for 10 hMicro-Electro-Mechanical Systems (MEMS) device electrode surface | 4 · Experimental Section - Humidity sensing measurements · Figure 3 |
| Lu-HHTP black powderresearch_0099__mat__lu_hhtp | Powder · Target Sample · Pristine Framework | solvothermal product collected by centrifugation, washed with distilled water and ethanol several times, then dried under vacuum at 60 deg C overnight | 4 · Experimental Section - Synthesis of Lu-HHTP |
| Pressed Lu-HHTP pelletresearch_0099__mat__lu_hhtp | Pellet · Target Sample · Pristine Framework | Lu-HHTP powder compressed between copper nails in a tube under 0.4 GPa for two-contact probe conductivitydetermined by micrometer from average of 5 measurements; numeric thickness not reported | 4 · Experimental Section - Electrical conductivity measurements · Figure S4 |
| Lu-HHTP after water or humidity exposureresearch_0099__mat__lu_hhtp | Powder · Target Sample · Pristine Framework | Lu-HHTP after soaking in water for 24 h or after 95% RH humidity sensing experiment | 4 · Results and Discussion - humidity sensing mechanisms · Figures S6-S7 |