Ammonia Gas Sensor Response of a Vertical Zinc Oxide Nanorod-Gold Junction Diode at Room Temperature

Tu, Ying; Kyle, Candice; Luo, Hui; Zhang, De-Wen; Das, Anirban; Briscoe, Joe; Dunn, Steve; Titirici, Maria‐Magdalena; Krause, Steffi

doi:10.1021/acssensors.0c01769

Cited by 64 publications

(41 citation statements)

References 55 publications

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“…In the literature, today’s gas sensors have a power consumption in the µW range, but research aims for nW power consumption in the future. The power consumption when compared to other low power ammonia sensors reported in literature 33 – 38 showed that it is equivalent and three orders of magnitude lower than a commercial FIGARO ammonia sensor TGS826. The sensor performance for the gas sensors in this article is reported in terms of gas sensor response ( S ).…”

Section: Resultsmentioning

confidence: 79%

Three-dimensional platinum nanoparticle-based bridges for ammonia gas sensing

Isaac

Reiprich

Schlag

et al. 2021

Sci Rep

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This study demonstrates the fabrication of self-aligning three-dimensional (3D) platinum bridges for ammonia gas sensing using gas-phase electrodeposition. This deposition scheme can guide charged nanoparticles to predetermined locations on a surface with sub-micrometer resolution. A shutter-free deposition is possible, preventing the use of additional steps for lift-off and improving material yield. This method uses a spark discharge-based platinum nanoparticle source in combination with sequentially biased surface electrodes and charged photoresist patterns on a glass substrate. In this way, the parallel growth of multiple sensing nodes, in this case 3D self-aligning nanoparticle-based bridges, is accomplished. An array containing 360 locally grown bridges made out of 5 nm platinum nanoparticles is fabricated. The high surface-to-volume ratio of the 3D bridge morphology enables fast response and room temperature operated sensing capabilities. The bridges are preconditioned for ~ 24 h in nitrogen gas before being used for performance testing, ensuring drift-free sensor performance. In this study, platinum bridges are demonstrated to detect ammonia (NH3) with concentrations between 1400 and 100 ppm. The sensing mechanism, response times, cross-sensitivity, selectivity, and sensor stability are discussed. The device showed a sensor response of ~ 4% at 100 ppm NH3 with a 70% response time of 8 min at room temperature.

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Section: Resultsmentioning

confidence: 79%

Three-dimensional platinum nanoparticle-based bridges for ammonia gas sensing

Isaac

Reiprich

Schlag

et al. 2021

Sci Rep

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“…First, due to the spillover effect of Au toward oxygen, the addition of Au NPs can further enhance the influence of oxygen on the sensing process. 54 In addition, Au likely acts as a "carrier storage box" on the surface of InSe, which makes it possible to achieve favorable responses toward NO 2 and NH 3 by controlling light illumination. Briefly, Au NPs can store electrons of InSe under dark conditions (p-type doping effect).…”

Section: R R Qv Kt Expmentioning

confidence: 99%

A Fully Integrated Flexible Tunable Chemical Sensor Based on Gold-Modified Indium Selenide Nanosheets

Zhang

Yang

et al. 2022

ACS Sens.

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In this work, a novel light-modulated bifunctional gas sensor based on Au nanoparticles-modified 2D InSe nanosheets was demonstrated. The prepared sensor displayed a reversible and extremely high response for recognition of nitrogen dioxide (NO 2 ) under visible-light illumination. The sensitivity (1192%) was about 10 times higher than that under dark condition, and the limit of detection (LOD) was 0.17 ppb. In contrast, when sensing ammonia (NH 3 ), higher sensitivity and selectivity were obtained in darkness rather than in light, with sensitivity and LOD of 11% and 0.2 ppm. Furthermore, the sensor possesses decent stability, repeatability, and anti-interference ability. The tunable sensing behavior with light modulation has been clearly studied with the help of density functional theory. A new principle called "carrier storage box" of Au nanoparticles was proposed to explain the change in surface state of InSe under light modulation. Finally, the prepared sensor has been successfully applied to construct a fully integrated wearable device to measure NH 3 and NO 2 in ambient environment. In all, this work provides a highly competitive gas detection method and paves the way for designing 2D materials-based optoelectronic devices with tunable and multifunctional features.

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“…There are several reports of the use of ZnO in sensing applications, including gas sensors, , ultraviolet (UV) sensors, ,, and pressure sensors . Moreover, ZnO is used in applications related to its photocatalytic activity. , In the area of nanomaterials-based glucose sensors, there are several reports of the use of ZnO nanomaterials and hybrid nanostructures containing this metal oxide in enzymatic glucose sensors − and nonenzymatic sensors, whether amperometric − or optical. ,, …”

Section: Introductionmentioning

confidence: 99%

Visible Photoluminescent Zinc Oxide Nanorods for Label-Free Nonenzymatic Glucose Detection

Morais

Marques

Ferreira

et al. 2022

ACS Appl. Nano Mater.

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Diabetes mellitus affects a significant percentage of the world’s population, and the incidence of this disease is expected to increase exponentially in the coming years. The development of practical and low-cost glucose sensors is of utmost importance to monitor and manage diabetes and diabetes associated complications. In this scope, a nonenzymatic glucose sensor was produced by growing zinc oxide (ZnO) nanorods on a cellulose-based substrate by microwave-assisted hydrothermal synthesis. The developed sensor relies on ZnO nanorods’ photocatalytic ability to photo-oxidize glucose, eliminating the need to use an oxidase enzyme. The quantification of glucose is based on the quenching of the ZnO’s photoluminescence signal by the hydrogen peroxide produced during the nonenzymatic oxidation of this monosaccharide. The developed sensor possesses a sensitivity of 1.46%/mM, a linear range between 0.5 and 30 mM, and a limit of detection of 0.103 mM. The sensor showed good selectivity for glucose, and it was also demonstrated that there was a high correlation between the glucose concentration values obtained using the sensor’s calibration curve and the clinical data of human plasma samples, therefore validating the use of ZnO nanorods to monitor the glucose concentration in human plasma samples. This work reports for the first time a ZnO-based eco-friendly, stable, and highly selective alternative for glucose monitoring, pointing to a promising future for metal oxide nanostructures for biomedical sensors.

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Ammonia Gas Sensor Response of a Vertical Zinc Oxide Nanorod-Gold Junction Diode at Room Temperature

Cited by 64 publications

References 55 publications

Three-dimensional platinum nanoparticle-based bridges for ammonia gas sensing

Three-dimensional platinum nanoparticle-based bridges for ammonia gas sensing

A Fully Integrated Flexible Tunable Chemical Sensor Based on Gold-Modified Indium Selenide Nanosheets

Visible Photoluminescent Zinc Oxide Nanorods for Label-Free Nonenzymatic Glucose Detection

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