Work function based gas sensing with Cu-BTC metal-organic framework for selective aldehyde detection

Davydovskaya, P.; Pohle, Roland; Tawil, A.; Fleischer, M.

doi:10.1016/j.snb.2012.10.023

Cited by 75 publications

(45 citation statements)

References 11 publications

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“…2) What is the impact of sensing layer thickness on the measured work-function change?I no therw ords, is the response a bulk or surface-localizedp henomenon? The first question was addressed by using literature data for the Kelvin probe response [11] and comparing with our results. The second question was addressed by growing HKUST-1i nacyclicalo r" layer-bylayer" [23][24][25] manner directly on the CS-FET with 10 and 60 cycles.…”

Section: Hkust-1 Sensing Filmmentioning

confidence: 99%

“…[19] Ar epresentative I DS -V SUB plot used for work-function shift calculation is given in Figure S4 (Supporting Information), where I DS is the source-drain current and V SUB is the substrate voltage as in (e) Sensingmechanism: [22] when ag as adsorbs to the sensing material, its work function (F)s hifts, inducing changes in the band bending of the underlying silicon. [11] showinge xcellentagreement for all six sensors studied. Figure 1.…”

Section: Hkust-1 Sensing Filmmentioning

confidence: 99%

“…For instance, our comparison of literature reports for the heat of adsorption of various alcohols on HKUST-1 correlates with the marginal work-function changep er alcohol adsorbed. [10,11] Another heuristic is that the work-function response depends to al arge degreeo nt he metal, whichD avydovskaya et al showed by using aK elvin probe microscope with as eries of M-btc MOFs, in which M = Co, Ni, Al, Cd, to as eries of analytes [12] (the corresponding experimentw ith various linkers has not been performed yet). However,aMOF'sh igh affinityf or an analyte is not necessarily enough to provoke aw ork-function shift.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Transistor‐Based Work‐Function Measurement of Metal–Organic Frameworks for Ultra‐Low‐Power, Rationally Designed Chemical Sensors

Gardner

Gao

Fahad

et al. 2019

Chemistry A European J

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Ac lassic challenge in chemical sensingi ss electivity.M etal-organic frameworks (MOFs) are an exciting class of materials because they can be tuned for selective chemical adsorption. Adsorptione ventst riggerw ork-function shifts, which can be detectedw ith ac hemical-sensitive field-effect transistor (power % microwatts). In this work, several case studiesw ere used towards generalizing the sensing mechanism, ultimately towards our metal-centric hypothesis. HKUST-1 was used as ap roof-of-principle humidity sensor.The response is thickness independent, meaning the response is surfacel ocalized. ZIF-8 is demonstrated to be an NO 2 -sensing material,a nd the response is dominated by adsorptiona tm etal sites. Finally, MFM-300(In) shows how standard hard-soft acid-base theory can be used to qualitatively predict sensorr esponses. This paper sets the groundwork for using the tunability of metal-organic frameworks for chemicalsensing with distributed, scalable devices.[a] D.Supporting information and the ORCID identification number(s) for the author(s) of this articlecan be found under: https://doi.

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Section: Hkust-1 Sensing Filmmentioning

confidence: 99%

Section: Hkust-1 Sensing Filmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Transistor‐Based Work‐Function Measurement of Metal–Organic Frameworks for Ultra‐Low‐Power, Rationally Designed Chemical Sensors

Gardner

Gao

Fahad

et al. 2019

Chemistry A European J

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“…It should be noted that the change of CDEE (or work function) can be used as an index for determination of the chemicals adsorbed on an adsorbent. The sensors that work based on the change of CDEE are called work function‐based sensors …”

Section: Resultsmentioning

confidence: 99%

The effect of electric field and Al doping on the sensitivity of hexa‐peri‐hexabenzocoronene nanographene to chloropicrin

Hosseinian

Gharachorloo

Lighvani

et al. 2018

Applied Organom Chemis

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It has been previously reported that the recently synthesized hexa‐peri‐hexabenzocoronene (HBC) nanographene cannot detect toxic chloropicrin (CP) gas. To overcome this problem, we examined the effect of Al doping and applying an electric field on the sensitivity of HBC towards CP gas by means of density functional theory calculations. We found that the Al‐doping process significantly increases the adsorption energy of CP gas from −7.1 to −39.9 kcal mol−1 but decreases the sensitivity of HBC. By applying an electric field, the HBC is polarized with two different electrostatic potentials on its different surfaces, which increases the adsorption energy. By increasing the electric field strength, the adsorption energy and electronic sensitivity of HBC are increased. We predicted that in the presence of an electric field of about −0.025 au, HBC can act as an electronic senor or a work function‐type sensor with a short recovery time. At this field, the electrical conductivity of HBC is significantly increased on CP adsorption which generates an electrical signal. Increasing the electric field to higher intensities is not favourable because of increasing recovery times, and decreasing it to lower intensities reduces the sensitivity of HBC.

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“…The selectivity of the SAW sensor has not been investigated. Cu-BTC has also been used for aldehyde sensing [37], where the work function of Cu-BTC on titanium nitride was changed by adsorption of aldehydes, especially pentanal. The sensor also responded to relative humidity strongly.…”

Section: Detection Of Trace Water With Cu-btcmentioning

confidence: 99%

A fiber optic sensor with a metal organic framework as a sensing material for trace levels of water in industrial gases

Ohira

Miki²,

Matsuzaki

et al. 2015

Analytica Chimica Acta

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Work function based gas sensing with Cu-BTC metal-organic framework for selective aldehyde detection

Cited by 75 publications

References 11 publications

Transistor‐Based Work‐Function Measurement of Metal–Organic Frameworks for Ultra‐Low‐Power, Rationally Designed Chemical Sensors

Transistor‐Based Work‐Function Measurement of Metal–Organic Frameworks for Ultra‐Low‐Power, Rationally Designed Chemical Sensors

The effect of electric field and Al doping on the sensitivity of hexa‐peri‐hexabenzocoronene nanographene to chloropicrin

A fiber optic sensor with a metal organic framework as a sensing material for trace levels of water in industrial gases

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